Unison Research P70 amplifier

Fully balanced dual mono valves amplifier in Push-Pull

Designing the P70 has required about one year of work. The very first prototype has been developed in 2006, and it immediately showed all the critical elements related with this kind of design. It took time to find all the electronic solutions that have lead to the current circuitry.

The P70 is now an amplifier capable of delivering more than 70 W per channel into a 6 Ω  load, with Total Harmonic Distortion lower than 0,2% over the whole audio band. Its performances are comparable to those of a good single ended amplifier.

 

Structure of P70

The amplifier is laid out in dual mono configuration. Both the amplifier stages and the power supply circuits are completely independent. The signal path in the amplifier is fully balanced from the input through the output. This means that the signal at the output terminals is balanced with respect to the amplifier ground.

The P70 has four line inputs. All of them can be balanced or unbalanced, an external switch allows the selection. The volume potentiometer is a four sections motorised Alps blue series potentiometer. The selection of the channel is performed by four high quality relè.

All the operations of the amplifier, included the safety functions, are controlled by a microprocessor to ensure maximum reliability and intuitive user interface.

The amplifier itself is constituted by an input stage featuring two double triodes ECC83 and one double triode ECC82, and a power stage with two KT88 per channel.

The output transformer has been custom designed by Unison Research and ensure a bandwidth of more than 30 kHz at full power.

 

The preamplifier is constituted by a double differential pair in an original configuration. The two differential stages are DC coupled and allow to reach the needed gain. They are followed by a couple of cathode followers, again DC coupled, which guarantee the low output impedance required. The power supply for the whole preamplifier stage has a very high voltage, around 600 V.

The input stage has a local feedback, characterised by different feedback factors for the bias component and the signal. The two different values are set keeping into account the different need for precision on the value of the bias and of the signal.

The importance of a stable controlled bias in the amplifier is due first of all to the choice of the DC coupling between the stages and also to the need to allow the same signal excursion along the paths of the balanced signal.

The circuit we have designed amplifiers signals up to 200 V p-p. conversely, the feedback factor affecting the signal has been kept to the lowest possible value.

 

Specifications

Power Output:  70 W +70 W RMS

Output Impedance:  6 Ω  (4 - 8 ohms)

Input Sensitivity:  500 mV

Input Impedance:  47 k Ω

Frequency Response:  10 Hz to 40,000 Hz (0,5 dB, 1 W)

Signal-to-Noise Ratio:  83 dB A

Total Harmonic Distortion :  0,3% (10 W)

Negative Feedback:  12 dB

Damping Factor:  8

CMRR:  59 dB

Power Requirements:  105 - 120 / 210 - 240 V , 50/60 Hz at rest 360 W

Dimensions (W x H x D):  460 x 450 x 200 mm

Weight:  35 kg

 

Thiel CS2.3 loudspeakers

 

The Thiel CS2.3 reflects our highest standards for sonic reproduction, regardless of price or class.

 

The 3-way CS2.3 incorporates many of the advanced driver, enclosure, and crossover design principles used in larger and more expensive Thiel models, but does so at a lower price and in a moderately sized cabinet. The CS2.3 employs a 1-inch metal dome tweeter coaxially mounted with a 3.5-inch midrange driver, and an 8-inch metal diaphragm woofer, with a passive radiator. Thiel’s unique  Coherent Source design provides greater realism The CS2.3’s outstanding performance is achieved in part by Thiel’s Coherent Source design technology which preserves the music’s time and phase information for much greater realism. Phase correct crossover design and time correct driver mounting provide natural three-dimensional imaging and greater clarity. The CS2.3’s high performance also results from our extremely thorough engineering, rugged construction, and use of unusually high quality components.

 

Features

A 3-inch thick baffle, 1-inch thick cabinet walls, and internal bracing greatly increase cabinet stiffness. By reducing unwanted vibration, both clarity and imaging performance are improved.

The baffle’s rounded edges contribute to very open sound by significantly reducing edge diffraction.

Thiel-designed and built drivers incorporate several innovative design techniques to reduce diaphragm resonances, increase output levels, and lower distortion.

 

 

Specifications

Bandwidth (-3 dB):  35 Hz - 23 kHz

Amplitude Response:  37 Hz - 20 KHz ±2 dB

Phase Response:  minimum ±5°

Sensitivity:  87 dB at 2.8 v-1m

Impedance:  4Ω, 3Ω minimum

Recommended Power:  100-400 watts

Driver Complement:

Woofer :  8" (6.4" radiating area) with anodized aluminum cone, cast frame, 1.7" dia. voice coil. Underhung coil (short coil/ long gap) motor system. Linear travel 0.4" pk-pk, 13 in3 linear displacement. 2.5 lb. magnet, 6 lb. total magnet structure. Copper pole sleeve, copper magnet ring. Made by THIEL.

Midrange :  4.5" (2.7" radiating area) with anodized aluminum diaphragm, cast frame, 1" dia. voice coil. Underhung coil (short coil/long gap) motor system. Linear travel 1/8" pk-pk. Magnet weight of .8 lb. powers midrange and tweeter. Copper pole sleeve. Ferrofluid. Made by THIEL.

Tweeter :  1" (1.2" radiating area) with anodized aluminum dome. Powered by midrange motor. Coincident with midrange.

Dimensions (W x D x H):  11 x 15 x 41.5 inches

Weight:  70 lb

Thiel CS1.6 loudspeakers

Coherent Source ® Loudspeaker

 

The CS1.6 is a 2-way floor-standing model incorporating several new innovative design techniques that greatly improve performance in a small, floorstanding loudspeaker. The 36-inch tall CS1.6 delivers a much purer and more open upper midrange response coupled with a sweeter and smoother high frequency performance than conventional two-way models. The new CS1.6 also offers a very high 90 dB efficiency to work well with lower amounts of amplifier power.

Completely Time and Phase Coherent

As with all THIEL loudspeakers, the CS1.6 is completely time and phase coherent for much greater sonic realism. THIEL’s Coherent Source® technology achieves the elimination of both time and phase distortions that cause alterations in the reproduced musical waveforms of most loudspeakers. Eliminating these distortions results in enhanced realism, clarity, transparency and immediacy as well as improved imaging and soundstaging in both the lateral and depth perspectives. Phase coherence is achieved by utilizing a sophisticated first-order electrical crossover system in conjunction with unusually wide bandwidth drivers. Time coherence is achieved by placement of the drivers on a baffle that is sloped at the correct angle to cause the sound energy from each to reach the listener at the same time.

 

Innovative Woofer and Tweeter Design

Much of the CS1.6’s outstanding performance is the result of its new high output, high efficiency aluminum dome, 1-inch tweeter and the innovative woofer diaphragm/voice coil design. Both drivers incorporate short coil/long gap, copper stabilized motor systems to greatly reduce distortion, employ metal diaphragms for very uniform Frequency response and clarity, and use Long Excursion Motor Systems for high Output capability.

 

High performance from a small, floor-standing loudspeaker

The CS1.6 is a two-way, floor-standing speaker system that incorporates THIEL’s latest innovative driver technology, rugged cabinet construction, and phase/time correct Coherent Source® design. Allmetal diaphragm, low-distortion drivers are used for outstanding tonal response and the advanced phase correct crossover design greatly improves spatial fidelity and clarity.

 

High output, high efficiency tweeter

The CS1.6 tweeter is a high output, high efficiency aluminum dome unit with long excursion abilities that reduce distortion and increase output capability. The new high frequency driver uses a short coil/long gap motor system design for low distortion, a copper sleeve to stabilize the strength of the magnetic field for reduced distortion, and practically unbreakable lead wires for increased reliability—features all shared with THIEL’s more expensive models’ tweeters.

 

Metal diaphragm, low distortion woofer

The CS1.6’s 6.5-inch woofer uses a much larger than normal diameter voice coil to greatly extend the woofer’s bandwidth for improved upper midrange performance. The large diameter coil distributes its driving force over a large area of the cone rather than concentrating it at the center. This coil design coupled with the woofer’s metal diaphragm increases the cone’s stiffness and frequency of unwanted resonances for very clear and open reproduction. The short coil/long gap, copper-stabilized motor system dramatically reduces distortion. Equally innovative is the woofer’s centrally located neodymium magnet that is placed inside the coil, rather than outside, creating an inherently shielded speaker to prevent picture distortion when placed near video displays.

 

Cabinet construction

The compact cabinet is built with a 2-inch thick front baffle and 1-inch thick cabinet walls for extreme rigidity to reduce unwanted vibration, improving clarity and spatial performance. The baffle’s rounded edges reduce diffraction effects for improved tonal, spatial, and transient performance, and its sloped front correctly time aligns the tweeter with the woofer. The unique slotted bass reflex system reduces unwanted port noise and grille loading effects.

 

Finished in the world’s finest woods

The CS1.6 is available in a wide variety of exquisite, real-wood, laminate, and painted cabinet finishes, finely crafted to enhance any home environment.

 

Specifications:

Bandwidth (–3dB):  48 Hz - 20 kHz

Amplitude Response:  50 Hz - 20 kHz ±2 dB

Phase Response:  Minimum ±10°

Sensitivity: 90 dB at 2.8 V-1m

Impedance:  4 Ω   (3.0 Ω   minimum)

Recommended Power:  50 - 300 watts

Dimensions (W x D x H):  9" x 11.5" x 35.5"

Weight:  38 pounds

 

Tascam DA-45HR DAT recorder

Here's the new standard in audio mastering technology. The Tascam DA-45HR is the worlds first 24-bit high resolution DAT recorder. It combines stunning audio performance with a rugged transport, advanced features and backward compatibility with standard 16-bit DAT.

A full audio I/O complement and word sync in/thru provide all the tools to integrate into any analog or digital studio of any size. Perfect for studios and mastering houses, the DA-45HR bridges the gap between the 16 bit and 24 bit worlds with a familiar interface you already know.

 

The 24 bit format DAT uses the same DAT tape that is used in standard DAT recorders. In order to store the extra data generated by higher resolution recording, the tape speed is doubled in HR (High Resolution) mode. So, when you're recording in 24 bit HR mode, a standard 120 minute tape will last 60 minutes. Obviously, 24 bit DAT tapes will only play back on a 24 bit DAT recorder like the DA-45HR.

The DA-45HR can also run just like a standard 16 bit DAT recorder, running normal speed and writing 16 bits to the tape. Reading and writing is fully supported, so you won't have to dig out a different DAT recorder for anything else.

 

Specifications:

Tape Speed:  SP - 8.15 mm/s; HR - 16.3 mm/s

Recording Time (120 DAT):  SP - 120 minutes; HR - 60 minutes

Recording Resolution:  SP - 16 bit; HR - 24 bit

Recording Sample Rate:  44.1 kHz, 48 kHz

Frequency Response:  20 Hz- 20 kHz ±0.5 dB (SP & HR modes)

Signal to Noise Ratio: 

Better than 105 dB Playback (SP)

Better than 112 dB Recording, 105 dB Overall (HR)

Total Harmonic Distortion: 

Less than 0.005% Playback (SP)

Less than 0.002% Recording, less than 0.004 Overall (HR)

Wow and Flutter:  Unmeasurable (less than 0.001%)

Channel Separation:  better than 95 dB (1 kHz at Full Scale)

Input RCA: 

-10 dBV, 50 k Ω 

+6 dBV Maximum (2 V rms)

Input XLR: 

+4 dBu, 10 k Ω   (-16 dB, -18 dB, -20 dB Full Scale)

+20 dBV, +22 dBV, +24 dBV Maximum

Output RCA: 

-10 dBV, less than 700 Ω 

+6 dBV Maximum (2 V rms)

Output XLR: 

+4 dBu, 27 Ω   (-16 dB, -18 dB, -20 dB Full Scale)

+20 dBu, +22 dBu, +24 dBu Maximum

AES/EBU I/O:  XLR-type, IEC60958 Type I (AES/EBU)

SPDIF Coaxial I/O:  RCA pin, IEC60958 Type II (SPDIF)

Headphone Output:  2x50 mW into 32 Ω 

Word Sync IN/THRU:  75 Ω   (auto-terminating)

Control Ports:  1/8" mini plug accepts RC-D45 remote DB15 Parallel I/O

General Specifications:

Power Requirements:   

120 V AC, 60 Hz (USA/Canada Model); 

230 V AC, 50 Hz (UK/Europe Model); 

240 V AC, 50 Hz (Australia Model)

Power Consumption:  40W

Dimensions:  482 x 140.5 x 368 mm (19" x 5.5" x 14.5")

Weight:  8.3Kg, 18.25 lbs.

Optional Accessories:  Wired Remote (RC-D45)

 

Technics RS-AZ6 cassette tape deck

Amorphous -Z 3-head Cassette Deck

Features

Amorphous-Z Head significantly improves playback performance

ATC (Auto Tape Calibration) for optimum performance from each tape

Advanced tape transport mechanism - Hi-Speed FF/REW and Power Loading

Linear Magne-Field Class AA record EQ/amp

Anti-vibration THCB (Technical Hybrid Construction base)

Dolby HX Pro & Dolby B/C NR systems

Hi-speed TPS (Tape Program Search)

Linear electronic counter with memory stop

Auto tape/source monitor select

MPX filter on/off

Wireless remote control capability with selected Technics Amplifiers and receivers

 

Specifications

Deck System:  Stereo cassette deck

Track System:  4-track 2-channel

Recording System Frequency:  AC Bias 210 kHz

Erasing System:  AC erase

Heads:

Recording : Permalloy head

Playback :  Thin-Film type head

Erasing : Double-gap ferrite head

Motors:

Capstan Drive :  DC servo motor

Reel Drive :  DC motor

Tape Speed:  4,8 cm/sec

Wow and Flutter:  0,07% WRMS ±0,2 % (DIN)

Frequency Response:

Normal Tape :  20 Hz - 17 kHz  ±3 dB (20 Hz - 18 kHz DIN)

CrO₂ Tape :  20 Hz - 18 kHz ±3 dB (20 Hz - 19 kHz DIN)

Metal Tape :  22 Hz - 23 kHz ±3 dB (20 Hz - 24 kHz DIN)

Signal-to-Noise Ratio

Dolby NR Off :  62 dB A-weighted)

Dolby B NR On :  71 dB (A-weighted)

Dolby C NR On :  78 dB (A-weighted)

Input Sensitivity/Impedance:

Rec Out :  100 mV/47 k Ω

Output Level/Impedance

Play :  500 mV/500 Ω

Headphones:  190 mV/ 8 - 600 Ω

Power Requirements:  230 -240 V AC 50/60 Hz

Power Consumption:  26 W

Dimensions (W x H x D):  430 x 125 x 290 mm

Weight:  3,9 kg

Ortofon MC 20 Super II cartridge

A Completely New Design  - Inside and Out

As the fourth generation of Ortofon's best selling Moving Coil cartridge ever, the MC 20 Super II has a tradition as well as a reputation to live up to. Very conscious of this, the Ortofon engineering team has carefully evaluated every detail and available technology, to create a cartridge which, will deline the standard of sound reproduction in its class.

 

Fritz Gyger Type 1 Stylus With Improved Geometry and Ultra Stable Imaging

The FG Type 1 stylus benefits from the latest technological advances within diamond cutting and polishing. It is now possible to produce a very slim profile which will track even the highest frequency groove information. This is particularly important for the innermost turns of the groove. At the same time, the FG Type 1 stylus is distinguished by a larger than normal footprint for reduced distortion and record wear.

The audible results are crystal clear - a convincing and natural reproduction with a very stable definition or width and depth in the musical perspective.

 

The Ortophase Concept Adds a New Dimension to Analogue Sound

The inherently phase linear characteristics of the FG Type 1 stylus are further emphasised by the proprietary Ortophase concept which was introduced in Ortofon's famous MC 2000 cartridge.

Statistically reliable listening tests and extensive laboratory studies have demonstrated the importance of phase linearity in the reproduction of high quality audio.

But it has taken Ortofon's experience and manufacturing technology to make cartridges phase linear. Since a cartridge is a bandwidth limited transducer, a ruler-flat frequency response will not produce phase linear characteristics. Ortofon's research has shown that a very carefully calculated shaping of the amplitude response will result in a linear phase response.

This is the reason why frequency charts for the MC 20 Super II , show a slightly rising level above 5 kHz. Normally, such a response would be interpreted as a result of uncontrolled resonances. In fact, the natural resonances are under full control, and every Ortofon Moving Coil cartridge has been tuned by hand to ensure that it precisely meets the specifications of the Ortophase concept.

 

Non-Resonant Aluminium Cartridge Housing Prevents Sonic Colouration

The sound of the MC 20 Super II also benefits from Ortofon's new aluminium cartridge housing.

Internally, the magnetic assembly is securely screwed and glued to the body, and the precision fit of the two anodised extrusions makes the entire housing acoustically inert.

The large, solid upper plate makes it easy to achieve a perfect mechanical coupling to any high quality shell.

 

Specifications:

Output Voltage:  0,2 mV (1 kHz, 5 cm/sec)

Channel Balance:  less than 1,0 dB

Channel Separation:  better than 25 dB

Frequency Response:  20 - 40,000 Hz +4 dB -1 dB

Compliance Dynamic:  16 µm/mN

Stylus:  FGT 2 type

Tracking Force:  1,6 - 2,0 g

Tracking Ability:  better than 90 µm

Recommended Load Impedance:  better than 100

Weight:  10 grams

 

McIntosh C-100 preamplifier

Controller and Preamplifier

 

The McIntosh C100 Preamplifier/Controller is without question the finest audio preamplifier ever created. No design compromises were allowed in the quest for a preamplifier with absolute accuracy, total sonic purity and virtual elimination of distortion and audible noise. For those who have been searching for their "Last Preamplifier" your search is over.

 

Full features Remote Control

Full featured RC is included that will allow complete control of all front panel controls and switches

 

Power Control Output

A Power Control connection for convenient turn on of McIntosh power amplifiers and accessories is included.

 

Dual Chassis Design

Dual-Chassis design completely separates all power supply, microprocessor and control circuits from the pure audio circuits for total noise isolation

 

Balanced and Unbalanced Inputs/Outputs

Three balanced high level inputs, three balanced main outputs and one balanced tape output, are provided. Eight unbalanced inputs, three unbalanced outputs as well as listen and record processor loops are included.

 

Precision Tracking Volume Control

Volume levels are controlled by a microprocessor controlled logarithmic attenuator with a tracking accuracy of 0,1 dB. Levels change in 213 individual 0,5 dB steps.

 

Precision Volume Display

The front panel digital Volume display indicates the preamplifier gain in dB or percentage of available volume

 

Precision Parts

Only the finest precision 1% tolerance resistors and polypropylene capacitors are used throughout

 

Moving Coil and Moving Magnet Phono Input

Separate shielded precision RIAA phono preamplifier for low output moving coil phono cartridges, utilizes two double mu metal shielded, silver wire, step-up transformers. Precision RIAA phono preamplifier for moving magnet cartridges.

 

Ultra Low Distortion

Distortion levels of all types are less than 0,002%. Music is amplified with total transparency and accuracy

 

Specifications

Frequency Response:  10 Hz - 40,000 Hz +0 -0,5 dB

Total Harmonic Distortion :  0,002% (from 10 Hz to 40,000 Hz)

Signal-to-Noise Ratio : 

Phono :  86 dB

High Level :  100 dB

Max. Voltage Output:

Balanced :  25 V rms

Unbalanced ;  12 V rms

Output Impedance:  50 Ω 

Sensitivity

Phono MM :  4,4 mV for 2,5 V rated output (1mV IHF)

Phono MC :  100 µV for 2,5 V rated output

High Level:  450 mV for 2,5 V rated output

Input Impedance

Phono MM :  47 k Ω  (65 pF)

Phono MC :  10 Ω

High Level :  22 k Ω  (unbalanced), 44 k Ω  (balanced)

Max. Input Signal:

Phono MM :  50 mV

High Level :  5 V (unbalanced), 5 V (balanced)

Power Requirements:  100, 110, 120, 220, 230, 240 V, 50/60 Hz at 30 watts

Dimensions (W x H x D):  445 x 137 x 445 mm (17-1/2" x 5-3/8" x 17-1/2")

Weight:  31,8 kg (70 lbs)shipping

 

Thorens TD-180 turntable

Welcome to Analogue. The Thorens turntable starts here, and this model is ideally suited for newcomers. It has lift function, automatic tonearm return, auto-shut-off, and it features a speed of 78 rpm. Great for playing those old shellacs. The appropriate stylus for shellacs is available as an accessory. It perfectly matches the phono cartridge supplied.

 

Specifications:

Drive System:  Thorens belt drive

Speeds:  33-⅓, 45 and 78 rpm

Motor:  regulated DC motor

Platter:  aluminium , 285 mm diameter; 800 g weight

Wow and Flutter:  less than 0,05%

Rumble: better than 66 dB

Tonearm:  TP 20

Effective Length :  231 mm

Effective mass :  16 gr

Anti-skating:  Weight on lever

Shut-off:  mechanical

Capacity of Signal Leads:  140 pf

Voltage Supply:  16 V from external power supply

Dimensions (W x H x D):  440 x 145 x 365 mm

Weight:  5,5 kg

 

Musical Fidelity X-P100 pre amplifier

 

X-P100 remote control Class A preamplifier.

The X-P100 is a new model based on our innovative and now very highly regarded Nu-Vista valve preamp but using Field Effect Transistors in place of the Nuvistor valves used in that model.

These transistors were carefully selected from the great many alternatives we tested because of their close similarity in both measured performance and sonic fingerprint to the 6CW4 Nuvistor. We feel that the X-P100 offers a very similar level of sonic fidelity to the Nu-Vista but at the reduced cost afforded by the choice of FET devices.

The X-P100 preamp also features full remote control and a high quality discrete MM phono stage.

 

External Power Supply and  Setting Up

The X-P100 is supplied with an external power supply which is connected to the main unit via an umbilical lead terminated in an XLR/Cannon type plug. This lead should be connected to the socket on the back of the X-P100 main unit.

 

Connections

All connections should be made with the power OFF.

The X-P100 has 5 line level inputs - CD, Tuner, Aux1, Aux2 and Tape, plus an MM phono input. All line inputs are electrically identical and are suitable for use with any source component with an output voltage in the hundreds of millivolts (mV). This includes CD players, tuners, tape machines and the audio outputs of video recorders, televisions, DVD and Laser Disc players etc.

The high quality phono input caters for turntables fitted with a Moving Magnet type cartridge or other cartridges with an output voltage in the range 1 to 5mV.

 

Tape Recording

The X-P100 has a single tape circuit with facilities for off-tape monitoring with 3-head cassette decks.

Connection of your tape machine to the X-P100 should be as follows. The tape machine's Tape/Line outputs go to the X-P100's 'Tape' input sockets. The tape machine's Tape/Line inputs go to the X-P100's 'Tape Record' output.

To record simply select the required source with the source selector knob on the front panel. The selected source will now be sent to the 'Tape Record' output for recording by the attached tape machine.

 

Remote Control

The X-P100 features Infra Red remote control of volume, input selection and mute functions via the supplied remote control handset. The Infra Red receiver is the small red lens marked I.R. situated on the front panel, it is a good idea to place your X-P100 such that there is an unobstructed line-of-sight to this lens from around your listening room.

 

Specifications:

Inputs:  5 Line, MM phono

Total Harmonic Distortion:

less than 0.007% (20 Hz - 20 kHz unweighted)

Less than  0.004% (20 Hz - 20 kHz ‘A’ weighted)

Frequency Response:  20 Hz - 20 kHz ±0.2 dB

Signal-to-Noise Ratio

MM Phono:  better than 72 dB unweighted

MM Phono :  better than 78 dB 'A' weighted

Line : better than  81 dB unweighted

Line : better than  90 dB ‘A’ weighted

Dimensions (W x H x D)  230 x 110 x 315mm, Width and height include feet

Power Consumption: 20 watts (maximum)

Standard accessories:

Remote control handset

X-P100 power supply unit

IEC type mains lead

2 x batteries (AA, SUM-3, CR6)

Musical Fidelity X-AS100 power amp

Musical Fidelity X-AS100 Power Amplifier.

Used properly and carefully, it should give you many years of outstanding musical reproduction.

Aesthetically and electronically the X-AS100 matches perfectly with the X-P100 Preamplifier, X-RAY CD player and X-PLORA tuner. Together, they form one of the finest hi-fi systems available.

The X-AS100 has been designed to be switched on continuously. The PSU should be positioned as far away from the X-AS100 as possible. We suggest that the PSU is placed on the floor near the mains outlet.

Dust regularly with a soft duster or soft brush but be careful when using cleaning or polishing agents - they may harm the surface finish

 

Connections

The X-AS100 is a stereo amplifier which can if required be mono for use in passive bi-amping systems.

The X-AS100 can be used with a preamplifier or any line level source which has a volume control. We highly recommend the matching X-P100 or Nu-Vista Preamps available from Musical Fidelity as an excellent choice.

 

Specifications:

Power Output: 100 watts per channel, 8 Ω

Total Harmonic Distortion:

less than 0.005% (at 1 kHz)

Less than  0.04% (20 Hz - 20 kHz unweighted)

Less than  0.003% (20 Hz - 20 kHz 'A' weighted)

Frequency Response:  10 Hz - 70 kHz ±1 dB

Input Sensitivity:  900 mV

Signal-to-Noise Ratio

Better than  106 dB unweighted (ref 100W)

Better than  117 dB ‘A’ weighted (ref 100W)

Better than  86 dB unweighted (ref 1W)

Better than  97 dB 'A' weighted (ref 1W)

Channel Separation: better than 90 dB( 20 Hz-20 kHz)

Power Consumption: 450 watts (maximum)

Dimensions (W x H x D): 230 x 110 x 330mm (Width and height include feet, depth include terminals)

Standard accessories

 X-AS100 power supply unit

IEC type mains lead

Audiostatic ES-100 loudspeakers

 

The Audiostatic Philosophy

Be it from a piano string, clarinet reed, drum skin or vocal chord; the beginning, middle and end of any sound is vibration, making high-fidelity sound reproduction a trickly proposition. In the recording process, you are starting with a sound source such as a violin string, which vibrates at a certain primary frequency of cycles per second, yet alos creates a variety of secondary frequencies or harmonics. This vibration pressurizes the nearby air, producing sound waves that cause objects in the vicinity to vibrate in unison. If these objects are sensitive devices such as microphones, containing a single responsive membrane capable of matching all of the primary and secondary vibrations of the source, a coherent translation of acoustic energy into electric energy can be made.

Ideally, the translation in playback from electric to acoustic energy should be exactly the reverse of the recording method. That is, the end of the playback chain should be a single, coherent membrane that acts as a microphone in reverse, capable of matching the vibrations of the original instrument and exciting the eardrums to move in unison.

Conventional, planar and ribbon two-way or three-way cross-over-type speakers do not behave like either the microphone or the original sound source. They attempt to divide the source into two or three separate vibration sources, reuniting them in mid-air. This results in a lack of coherency or faithfulness to the original sound, simply because a vibrating violin string does not break itself into two or three separate frequency elements and then reintegrate these separate frequencies in mid-air at the microphone.

 

An Audiostatic electrostatic speaker is a device that works essentially as a microphone in reverse. It uses no crossovers to artifically create a frequency division which did not exist in the source,  and because its moving mass is so much lighter than conventional, planar and ribbon speakers, it is capable of the very fast acceleration and deceleration necessary to keep up with the complexity of the original sound.

 

The Audiostatic ES 100 Series

Audiostatic ES 100 series are pure full range electrostatics. The heart of each Audiostatic electrostatic loudspeaker is the multi suspension (US patent 4105877) electrostatic element with ultra low mass membrane.

To prevent even the smallest irriqularities in sound, the frames of the ES 100 series are of a solid, 35 mm thick m.d.f. construction. There is no sound-degrading obstruction like grille cloth between the loudspeaker membrane and the listener's ear. Only computer grade electronic components are used, with polypropylene capacitors in the sound path. Massive 18 crt. Goldplated terminals are standard, accepting every possible loudspeaker cable. Finish is in beautiful spekled lacquer, available in 16 colors without extra charge.

 

The Audiostatic Modular Design

Bipolar full range electrostatic need careful room matchment to insure optimum reproduction of low frequencies. For this reason the ES 100 can be extended with the SW 100 electrostatic subwoofer, to achieve the best possible results in larger rooms.

The SW 100 simply can be switched in parallel with the ES 100, without dropping the overal impedance below 4 ohms.

 

Specifications

Frequency Range:  35 Hz - 22,000 Hz

Sensitivity:  86 dB 1W/1m

Impedance:  8 Ω  minimum

Recommended Amplifier:  50 - 250 watts (8 Ω )

AC Input:  220 Volts (12 volts U.S.)

Suitable for rooms:  18 - 50 mq.

Dimensions:  1880 x 350 x 35 mm

Weight:  23 kg

Roksan Darius loudspeakers

 Originally designed to monitor the performance of the Xerxes record player, the principles learnt in its construction have been employed in other loudspeakers in the Roksan range.

Darius tackles the fundamental questions of what a loudspeaker is and what can be achieved from a stereo reproduction system.

A loudspeaker moves the air of the room with reference to some fixed point. With stereo, two fixed points are used. If the two reference points are in turn allowed to move, the intimate detail of the musicians performance is lost, the emotion reduced, and the picture or illusion of the sound stage is blurred and fore shortened. With a Darius loudspeaker system, the necessary steps are taken to ensure that the reference points are immutable.

 

The cabinet of the Darius is one inch thick and internally cross-braced to ensure rigidity, reducing the flexure of the panels. One of the braces has a dual function; it passes directly behind the bass driver and allows this unit to be clamped from both the front and back accurately fixing its position within the cabinet.

The cabinet is then located in an exoskeleton stand, that clamps the cabinet at eight carefully selected nodal points. The stand ensures that the Darius is rigidly held in position within the room. With the bass driver accurately located, the problem then becomes one of mounting the tweeter so that it is immune from the vibrations being produced by the bass unit.

 

The tweeter has its own dedicated mini-baffle which is suspended on four springs from the rest of the enclosure. This affords complete isolation from the rest of the cabinet. Vibrations from the bass driver cannot interfere with the tweeter's operation.

With both drive units now fixed, the reference points are well defined and the result is an exceptionally clear sound and realistic three dimensional sound stage.

The Darius loudspeaker system has the crossover external to the cabinets so that the system can be extended by adding Darius sub woofers and active amplification.

 

Cabinets are available in a wide choice of real wood; Black ash, walnut, teak, oak, rosewood and black piano lacquer finishes.

Dimensions

Darius :  470 x 265 x 405 mm

Stand ;  965 x 445 x 330 mm

Crossover :  280 x 275 x 60 mm

Lyngdorf TacT SDAI-2175 amplifier

Lyngdorf SDAI 2175 is a compact, high performance semi digital integrated switch-mode amplifier utilizing some of the circuit topologies originally developed for the Lyngdorf Millennium amplifier. Due to the switch-mode topology, with an efficiency of up to 85%, the SDAI 2175 will provide its output power with minimal heat dissipation. A massive power supply with a 650VA toroid transformer and more than 40000uF capacitors ensures that the SDAI 2175 can deliver the current to drive even the most demanding loudspeakers.

The SDAI 2175 has 2 gold-plated XLR connectors accepting balanced input signals and 6 stereo inputs with 2 gold-plated RCA connectors for unbalanced signals. The SDAI 2175 has a stereo tape out of the selected line level input signal and pre out of the selected input signal after the volume control as either balanced signal from the gold-plated XLR connectors or unbalanced from the gold-plated RCA connectors.

The volume control is implemented as a high precision digital controlled analog attenuation in 0.1 dB steps over a 100 dB range. Input selection is performed via precision relays with double gold plated construction of the contact set. These kind of relays are normally only used in expensive measurement equipment for high linearity and low losses.

 

All controls can be operated from the front panel via the logical user interface or by use of the remote control. Or as an option the setup and operation can be performed via a PC interface.

The input signal is fed to the volume control circuit via an AC coupled true instrumentation type input amplifier. Except for this AC coupling, the SDAI 2175 is fully DC coupled with no bypass capacitors or DC servos to degrade the performance. The protection circuitry in the SDAI 2175 shuts down the unit in case of over-temperature, DC voltage on the outputs and too high output current. The amplifier will resume normal operation when the fault condition is no longer present.

A trigger output on a 3.5mm jack connector allows the SDAI 2175 to control one or more SDA2175’s power condition.

 

Specifications

Balanced Input Connectors:  3 pin XLR, gold-plated.

Balanced Input Impedance:  10 k Ω   (AC-coupled)

Balanced Input CMRR:  40 dB (20 Hz - 20 kHz)

Unbalanced Input Connectors:  RCA (phono) jack, gold-plated

Unbalanced Input Impedance:  100 k Ω  (AC-coupled)

Tape Out Output Impedance:  75 Ω   (Gain 0  dB ref. active input)

Pre Out Output Impedance:  75 Ω   unbalanced; 100  balanced (Gain According to volume control setting. 88 dB = 0 dB with sensitivity 0 dB and rel. Volume 0 dB)

Max. Input Voltage:  ±12Vp AC, 0 - 20 V DC.

Input Sensitivity:  2 V (1V with high sens.) 200 W/8 Ω 

Voltage Gain:  26 dB

Output Connectors:  4 insulated binding posts, goldplated. (Will accept bare wire ends of up to 5 mm diameter)

Output Power (8 Ω ):   2 x 200 W (1KHz, 1% THD+N)

Output Power (4 Ω ):   2 x 375 W (1KHz, 1% THD+N)

Nominal Load Impedance:  4 Ω  - 8 Ω  (It is safe to operate the amplifier with no load)

Frequency Response:  0,3 Hz - 33 kHz (-3 dB points, 8 Ω  load)

Frequency Response:  -0 dB /+0,2 dB (20 Hz - 20 kHz, 8 Ω  load)

Frequency Response:  -0,2 dB / +0 dB (20 Hz - 20 kHz, 4 Ω  load)

Output Impedance:  0,035 Ω   (20 Hz - 1 kHz)

Output Impedance:  0,4 Ω  (20 kHz)

THD+N, (1 W/8 Ω ):   0,004% (A-wgt.)

THD+N, (1 W/4 Ω ):   0,006% (A-wgt.)

THD+N, (100 W/8 Ω:  0,01% (A-wgt.)

THD+N, (180 W/8 Ω:  0,07% (A-wgt.)

THD+N, (375 W/4 Ω:  0,07% (A-wgt.)

Signal-to-Noise Ratio:  113 dB (A-wgt. Ref. 200 W/8 Ω )

Channel separation:  84 dB (1 kHz, 200 W/8 Ω )

Peak output current:  –40 A

Output Common Mode Voltage:  35 V DC (Ref. Ground. The amplifier can not be used in bridged mono mode)

Output DC Voltage:  ±5 Mv

Output Short Circuit Current:  –40 A

Output DC Voltage:  –5 V at <0,1 Hz

Over Temperature:  All heat sinks and mains-transformer.

Mains Input Connector:  IEC 320 cold type (Mains lead supplied)

Mains Voltage Range:  100 - 120 V AC, 50/60 Hz (115 V version)

Mains Voltage Range:  200 - 240 V AC, 50/60 Hz (230 V version)

Internal Mains Fuse:  8 Amp (115 V version)

Internal Mains Fuse:  4 Amp (230 V version)

Power Consumption:  1,5 W (STANDBY mode)

Power Consumption:  35 W (OPERATE mode, no output)

Power Consumption:  116 W (2 x 37,5 W/4 Ω)

Power Consumption:  820 W (2 x 300 W/4 Ω)

Dimensions (W x H x D);  450 x 100 x 355 mm (17,72" x 3,94" x 13,98")

Weight:  13 kg (28,66 lb)