What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Sansui SC-737


Sansui SC-737
Dolby System Stereo Cassette Deck with M-C ferrite Head
Sansui feels so confident about the quality of this unusually fine cassette deck that we invite you to compare its performance and sound with that of any open-reel deck, even one of our own. That's a bold statement, particularly from a company known for its extreme concern for both the electronic specifications and actual tonal characteristics of its audio products.
To back it up; the SC-737 delivers a frequency response of 35 to 24,000 Hz ±3 dB; the built-in Dolby Type-B noise reductionreduction system allows noise reduction effect of more than 8 dB, the newly designed tape transport mechanism provides a wow and flutter factor of less than 0,11%. One of the first things you'll notice is the unusual size of the SC-737.  this allows sufficient space for the newly developed cassette tape transort mechanism of open-reel-performance quality, the advanced Dolby and all the sophisticated solid-state circuitry designed specifcally for this deck.

Feather-touch keyboard controls resist damage and wear. A built-in lock prevents accidental switching of mode. An automatic electro-optical shut-off device protects tape and moving parts. Hysteresis synchronous reel and capstan motor is unaffected by fluctuations in popwer. Sansui developed Magni-Crystal ferrite head with super-hard, mirror-like surface eliminates dropout and fluctuatio of high frequency signals.  And here's  a unique  feature: a third microphone input with separate recording level control is provided for center mic mixing. Other professional extras include oversized VU meters and separate peak level indicator, an improved 19 kHz Multiplex FM filter for FM recording, "radar" tape travel indicator, tape selector  ( normal, LH/cro2), 3-digit tape counter, no-click pause button, switchable voltage/cycle for international use, headphone jack , DIN and RCA-type input/ output jacks and easy-to-clean, easy-to-use top panel displays and attractive wooden cabinet.

Features:
High-Density Magni-Crystal Ferrite Record/Play Head
Record-Playback Preamplifier
Photoelectric Sensor Shut-Off
Tape Selector Switch
Peak level Indicator and Professional VU Meters
Center-Channel Microphone Mixing
Tape Travel Radar Indicator
Cut-Core Transformer

Specifications
Track System:  4-track 2-channel record/playback
Tape Standard:  philips Cassette standard
Tape Speed:  4,8 cm/sec 91-7/8 ips)
Heads:  record/Playback head; Erase head (ferrite head)
Motor:  Hysteresis synchronous type
Tape Driving System:  belt driving system
Wow and Flutter:  within 0,11 (WRMS)
Tape Speed Accuracy:  within 75 sececonds (C-60)
Frequency Response (Rec/Pb):
Normal tape :  30 - 13,000 Hz (35 - 11,000 Hz ±3 dB)
Chromium Tape :  30 -16,000 Hz (35 - 14,000 Hz ±3 dB)
Signal-to-Noise Ratio: 
Chromium Tape (Dolby Out):  better than 50 dB (weighted)
Dolby Noise Reduction Effect :  better than 8 dB (above 5 kHz)
Channell Separation:  better than 38 dB 91 kHz)
Erasure Factor:  more than 60 dB (1 kHz)
Input Sensitivity/Impedance (0 VU, 1 kHz):
Mic (L. R.) :  0,5 mV/10 k Ω
Mic (center) :  0,5 mV/10 k Ω
Line :  70 mV/100 k Ω
DIN :  14 mV/30 k Ω
Output Level (0 VU, 1 kHz):
Line :  0,56 V
DIN :  0,56 V
Bias Frequency:  85 kHz Nominal
Indicators:  Tape Run, Dolby NR, Record, peak level
Power Voltage :  100,17, 220, 240 V 50/60 Hz
Power Consumption:  22 W (rated)
Semiconductors:  41 Transistors, 2 FETs, 2 Zener Diodes, 17 Diodes, 6 Varistors, 1 Cds Cell
Dimensions (W x H x D):  464 x 121 x 294 mm (18-1/2" x 4-3/4" x 11-3/26")
Weight:  8,1 kg (17,8 lbs ) net




Akai GXC-36D

Stereo Cassette Tape Deck

Cassette recordings that rival reel-to-reel performance - that's what Akai's new GXC-36D delivers. Made possible with Akai's exclusive GX (glass and cystal) Head. There's even an Over-Level Suppressor Switch to limit high recording level distortion. And other impressive features that include a Tape Selector Switch, Tape Run Lamp, Pause Control, Direct Function Change Control, and a 3-digit Counter.

Put it to the hearing test.
In our ever constant pursuance of more perfect sound reproduction, we invented the incomperable GX Head. The application of this extraordinary head to our superior enginered cassette machines results in the upgrading of cassette sound to professional rell-to-reel performance. With the GX Head focused-field recording system, high frequency signals can be recorded and played back with perfect clarity. Review the features and specifications of this new cassette deck and then "put it to the hearing test". We are confident that you will be delighted.

Specifications:
Track System:  4-track 2-channel stereo system
Motor:  Induction Type Motor
Tape Speed:  1-7/8 ips
Wow And Flutter:  less than 0,12% WRMS
Frequency Response: 
40 Hz to 17,000 Hz using chromium dioxide tape
40 Hz to 15,000 Hz using low noise tape
Signal-to-Noise Ratio:  better than 48 dB
Heads: 
One GX recording/playback head
One erase head
Fast Forward & Rewind Time:  within 65 seconds using a C-60 type cassette tape
Output Jacks:
Line :  0,78 V (0 dB); required load impedance :  more than 200 k Ω
Phone :  30 mVat 8 Ω
Input jack:
Microphone :  0,5 mV/ 4,7 k Ω
Line :  70 mV/200 k Ω
DIN Jack :  0,5V/30 mV (high)/ 3 mV (low)
Semi-conductors:  21 Transistors; 12 Diodes
Power Consumption:  20 W
Dimensions (W x H x D):  410 x 115 x 223 mm (16,1" x 4,6" x 8,8")
Weight:  5,3 kg (11,7 lbs)


Quad II Integrated Amplifier


The Quad II-Classic Integrated
The rekindled interest in 2 channel analogue hi-fi been remarkable to witness. The popularity of vinyl has grown steadily over the last years and now represents a significant proportion amongst real music enthusiasts. Quad has been at the forefront of this trend with its development of some of the world's most stunning amplifiers  loudspeakers and phono stages. Creating a compact audiophile integrated solution for LP and Vintage Hi-End Audio lovers while working in collaboration with one of the industry's edteemed legendry figures, Tim DeParavicini.

Through his contemporary designs based on Qad's novel amplifier technology developed over half a century ago for his invention of the first Quad II Mono Amplifier introduced in 1953, our classic range of amplifier and speaker componenets represent far more than a nostalgic trip down memory lane. Each product represents as significant a design statement as their original counterparts.

The new Quad II Classic Integrated  Amplifier is perfectly balanced and completely integrated amplifier system to resolve system matching and offer exceptional performance nd value within a relatively compact and classically styled chassis.

Performance as you would expect from one of the most famous names in hi-fi, is nothing short of breattaking. The 25 watt per channel specified, belies their power and ability to drive even the most difficult loads. The remarkable output transformer design is characterized through its speed, agility and ability to convey the genuine passion of live performnce.

Design and Engineering
The KT-66 output valves, in push-pull configuration are visually stunning, even when safely secured within the cage tht protects them. Each valve produces around 25 watts per channel output in "Pure ClassA" which allows a suebrbly refined sound that appropriately matches modern as well as contemporary loudspeakers.

The package had to retainn the retro look of it famous preamplifier predecessor with th epower amplifier and transformers blended into a modern compact look. It has an understated elegance which lies beneath its smooth curves and lustrous finish because it uses a circuit dating back over fifty years to the time when vacumm tubes ruled the electronics industry and peter Walker was considered by many to be the master of audiophile design.

All Quad products are expected to last a lifetime - even longer. Many Quad customers still derive immense pleasure listening to products built over fifty years ago. The new Quad II Classic Integrated Amplifier is no exception, and with periodic servicing and a caring hand, you can expect its performance to continue for decades to come.

The Quad II Classic Integrated Amplifier operates in Pure Pentode (Beam Tetrode) output with partial cathode loading, this being more linear than so called ultralinear. It is a pure Class A operation, whereas its push pull operation's efficiency can only rach 50% max and its power supply is the usual capacitor filter with diode bridge rectifier, AC 6,3 volts heaters to the valves that is shared between both channels.

Equipped with a bi polar transistor phono amplifier that uses 4 transistors per channel with low feedback to provide correct RIAA equalisation. Also has a gain switch for moving coil caartridges, 0,25 mV at 1 kHz , a circuit which operates from a regulated 36 V derived directly from th emain HT valve. It ensures a very high overload performance from rcords.

The phono circuit is housed in a shielded compartment providing low noise RF proofing within th emain package.

Amplification Process
The Quad II Classic Integrated Amplifier output is 25 watt per channel  Integrated Amplifier had to obey Peter Walker's Philosophy  of cathode loading of the output stage and simplicity of design.
Upon Input, a selector switch routes the required signal to the volume control then on the first of 3 small driver valves. This first valve is an ECC83 acting as a differential balance circuit that is a phase slitter.
The output going into a pair of ECC88 valves that both operate as a cascode circuit for high gain and wide bandwidth directly drives the output valves (KT 66) via capacitors.
The circuit had to have high gain than a normal power amplifier to offer a nominal 250 mV input sensitivity on the various inputs.
Push pull feedback is arranged from the cathodes of the output back to the ECC88 valves to provide low distortion and noise with consistent performance.

Specificastions
Stereo Power Output:  25 W per channel into 8 Ω
Total Harmonic Distortion:  0,06% (at 15W &700 kHz )
Signal-to-Noise ratio:  better than -95 dB (ref 25 W into 8 Ω)
Frequency Response:  20 Hz - 20 kHz +0 dB -0,5 dB
Crosstalk: better than 75 dB
Gain :  34 dB
Noise:  -98 dB (275 mV input)
Valve Type:  4 x KT66; 4 x ECC88; 2 x ECC83
Input Channel:  3 x Line Level; 1 x MM/MC Phono and Tape monitor
Dimensions (W x H x D):  200 x 310 x 380 mm




Kenwood KR-1000

Computerized Hi-Speed DC Receive

Features:
Program Mode Commander memory flowchart display
Multi-functional weekly program clock/audioo timer
7-band digital graphic equalizer and mic mixing
Quartz synthesizer scan tuning, 6 FM/6 AM preset station recall
Digital volume control and bi-directional dubbing
Mic. Mixing
Hi-speed, DC, Zero switching amplifier
120 W/channel RMS, 8 ohms, 20 Hz -20 kHz, o,1% T.H.D.

Specifications
Audio Section
Power Output:  120 wattsper channel, minimum RMS, both channel driven at 8 Ω from 20 Hz to 20,000 Hz with no more than 0,01% Total Harmonic Distortion
Both Channel Driven
Into 8 Ω at 1,000 Hz :  150 W + 150 W
Into 4 Ω at 1,000 Hz :  130 W + 130 W
Dynamic Power Output at 8 Ω :  460 W
Total Harmonic Distortion (20 Hz -20 kHz from tape):
Rated power into 8 Ω :  0,01%
1 watt power  into 8 Ω :  0,005%
Intermodulation Distortion (60 Hz :7 kHz = 4:1 SMPTE)
Rated power into 8 Ω :  0,005%
Slew Rate :  ±150 V/µsec
Rise Time :  1,2 µsec
Damping Factor (at 1 kHz into 8 Ω):  75
Input Sensitivity/Impedance:
Phono :  2,5 mV/50 k Ω
Tape, AUX :  150 mV/50 k hm
MIC :  2,5 mV/50 k Ω
Signal-to-Noise Ratio (A weighted):
Phono :  82 dB for 2,5 mV input;  88 dB for 5,0 mV input
Tape, AUX :  105 dB for 150 mV input
MIC :  72 dB for 2,5 mV input
Maximum Phono Input Levelat 1,000 Hz :  150 mV(RMS, T.H.D. 0,03%)
Frequenct response:
Phono RIAA Standard Curve:  20 Hz to 20 kHz ±0,3db
Tape, AUX :  3 Hz to 270,00 Hz _3 dB
Tone Control: 7-Band graphic Equalizer
60 Hz, 160 Hz, 400 Hz, 1 kHz, 2,5 kHz, 6 kHz, 15 kHz :  ±10 dB at each frequency
Loudness Contour (vol _30 dB):  +10 dB at 100 Hz
Low Filter :  18 Hz at 6 dB/oct
High Filter :  5 kHz at 6 dB/oct
Output level/Impedance
Tape Rec Out
PIN :  150 mV/1 k Ω
DIN :  30 mV/80 k Ω
FM Tuner Section
Usable Sensitivity:  10,3 dBf (1,8 µV)
50 dB Quieting Sensitivity
Mono :  16,1 dBf (3,5 µV)
Stereo :  35,6 dBf (35 µV)
Signal-to-Noise Ratio at 65 dBf
Mono :  76 dB
Stereo :  70 dB
Total Harmonic Distortion at 1,000 Hz
Mono :  0,09%
Stereo ;  0,1%
Frequency response:  30 Hz ot 15,000 Hz +0,5 dB -1,0 dB
Capture Ratio:  1,0 dB
Image Rejection ratio:  80 dB (98 MHz)
Spurious Response ratio:  90 sb (98 MHz)
IF Response Ratio:  100 dB (98 MHz)
Alternate Channel Selectivity
Wide ;  30 dB at ±300 kHz
Narrow :  60 dB at ±300 kHz
AM Suppression Ratio:  60 dB
Stereo Separatio Ratio (Wide)
At 1,000 Hz :  50 dB
At 50 Hz to 10,000 Hz :  37 dB
Subcarrier product Ratio:   65 dB
Antenna Impedenca:  300 Ω balanced and 75 unbalanced
FM Frequency Range:  88 MHz to 108 MHz
Am Tuner Section
Usable Sensitivity:  14 µV
Signal-to-Noise Ratio:  50 dB
Image Rejection:  40 dB
Selectivity:  45 dB
General
Power Consumption: 
700 watts at full power
120 watts at no signal
AC Outlets: Switched 2, Unswitched 1
Dimensions (W x H x D):550 x 155 x 443 mm (21-21/32" x 6-3/32" x 17-7/16")
New Weight:  16 kg (35,3 lbs)



Royd Minstrel


The Minstrel fulfils that essential requirement - it allows you to enjoy your music to the full. Available in a stylish range of finishes, The Minstrel provides high quality listening at a realistic price.
The Minstrel is a versatile loudspeaker which may b eused on shelves, wall mounted or floorstanding, for which a base complete with spikes is available.
Designed for use with a very wide range of amplification, it is equally at home with a digital or analogue source.

The Minstrel is also unfussy as to its placement in the listening room and is therefore the ideal answer to accoustically difficult locations.
The new side ported reflex design allows for the sdjustment of bass response by choosing to have the ports face each other or a side wall.
The Minstrel benefits from Royd's ongoing research and development program and builds on the technical advances incorporated  in the acclaimed Royd Abbot. In addition to the use of mass damping and resistive bracing.

The Minstrel includes an innovative diaphragm construction for the bass unit, which has been developed with the use of the latest techniques of computer impulse analysis. This has resulted in the speaker capturing the full range and power of bass in recorded music without sacrificing any of the clarity and detail contained in the mid range.
These technical advances are clearly audible in the quality of the sound production of The Minstrel, making it an excellent choice for all high fidelity home entertainment systems.

Specifications
Recommended Amplifier Power:  20 - 80 watts
Sensitivity:  87 dB 1W/1m
Peak Power Handling:  100 watts
Nominal Impedance:  8 Ω
Drive Units
Cast Chassis 5" Bass/Mid Range unit
Royd 19 mm dome tweeter with secondary chamber
Crossover Frequency:  3 kHz
Bass Resonance Frequency:  43 Hz
Frequency Range:  33 Hz - 20 kHz
Cabinet Finish:  Black Ash Vinyl, Mahogany Vinyl, Silver Grey textured paint or walnut veneer
Dimensions (HxWxD): 625 x 180 x 120 mm
Base:  250 x 178 x 43 mm
Packed Weight:  16,5 kg incluse base


Infinity Reference Series 61i


Reference Series The Next Generation
In an era when pride in quality craftsmanship, independent creative thinking and conscientious attention to detail seem to be rapidly vanishing from almost every field of consumer goods, Infinity continues to lavish our unique blend of tender loving care and cutting edge engineering on every loudspeaker that bears the Infinity logo.

Most recently, we turned our attention to the popular Reference Series with an eye toward further elevating the already exceptional level of performance of this fine range of loudspeakers.
The result is Reference Series II - The Next Generation, quite simply one of the finest loudspeaker lines ever introduced. The second generation Reference Series loudspeakers represent substantial improvements in key areas such as efficiency, power handling and in both the quantity and quality of deep bass. One of the major contributing factors to this giant step forward is the introduction of drivers which incorporate proprietary APG lightweight cone technology, allowing them to respond to musical waveforms with amazing accuracy.

With higher efficiency, increased power handling and enhanced low frequency output, the new Reference Series is ready to take on any sonic challenge, from chamber melodies to operatic climaxes, from cheerful Aladdin to fearful Jurassic Park.

The Second Generation Reference Series incorporates:
Space-age APG driver technology with carbon and Kevlar fibers.
Super-light cones for improved sensitivity.
Low insertion loss crossovers for improved transient response.
Increased internal volume for extended deep bass response.
Rear-mounted port for undistorted bass response.
Crossover optimized for uniform phase response both on and off axis.
Internal bracing for reduced resonance.
Strategically placed internal damping to eliminate standing waves.
Sloped cabinet for reduced diffraction.
Redesigned grille for optimum vertical and horizontal dispersion.
Spikes for decoupling of floor-standing models.
Finest furniture craftsmanship. Sleeker, slimmer enclosure design.

APG cone technology
Without a doubt the most revolutionary innovation in the Reference Series is the implementation of a specially formulated graphite coated APG (acrylic polymer graphite) cone which combines the excellent internal damping of acrylic polymer with the stiffness of graphite. Extensive subjective and objective testing confirms that APG represents a major breakthrough in cone materials technology with stunning performance in terms of low distortion, linear frequency response, spacious sound and overall musicality.
The exclusive APG process aligns carbon and Kevlar fibers precisely along the polymer matrix, allowing total control over the contour and weight of the cone, while making it possible to create a lightweight cone with varying thickness, for greater dispersion of sound. Carbon and Kevlar fibers are embedded in an APG matrix in carefully controlled proportions. Following oven heating, the compound forms an extremely rigid, ultra-lightweight and super-strong composite cone material with maximum internal damping which offers a significant reduction in distortion caused by colorations, vibration and break-up modes. The sonic benefits of the fast transient response and high sensitivity of the new lightweight driver cones are readily apparent in the astonishing openness, lucidity and harmonic fidelity of the Reference Series loudspeakers. Their crisp, detailed sound is the result of innovative materials and driver technology unrivalled in contemporary loudspeaker engineering.

High sensitivity
Since APG cones are 30% lighter than paper cones of equal stiffness, Infinity engineers could design the new Reference Series with higher efficiency, without employing heavier, more costly magnetic structures.
The high sensitivity of the Reference Series loudspeakers, with highly efficient magnetic systems, super-light cones and low insertion loss crossovers, means far less work for your amplifier. Since amplifier distortion increases with higher power output, reducing power demands also yields a significant reduction in distortion.
Since lightweight cones respond more rapidly and linearly to transients, the rigid, high-tech cone materials employed in the high efficiency Reference Series dynamic drivers offer enhanced transparency, improved resolution of low level detail and of the ambience cues which create a wide and deep soundstage. An increase of 3dB in sensitivity reduces by 50% the power required from your amplifier to achieve the same sound pressure level.

Sophisticated crossover
The new Infinity Reference Series' low insertion loss crossover networks employ select-grade components in o crossover configuration designed to preserve signal integrity and efficiency.
Crossover design assisted by state of the art. computer technology and controlled by  extensive listening tests ensures optimum linearity combined with lowest distortion and the finest sonic quality.
The high efficiency of the crossovers permits  the use of Reference Series speakers in high power applications, including demanding home theater systems.

Enclosure design
In the new Reference Series loudspeakers  radical steps have been taken to eliminate the "boxiness" normally associated with conventional cabinet construction.
The midrange drivers are installed in separate air-tight compartments filled with special damping material to provide smooth, linear reproduction of the crucial midband.
Internal bracing and damping reduce the deleterious effects of resonances and standing waves. Front baffle diffraction phenomena, which typically introduce smearing in the time domain, are reduced through the implementation of an optimized grille shape and through tapering of cabinet top and sides. Rear-mounted bass reflex ports minimize noise, while providing extended, punchy bass.
The Reference Series speakers in Chatsworth Oak or Black Ash vinyl are finished to the highest standards of furniture craftsmanship and their sleek contemporary "Tower" look will match most interiors.


 Reference 61 i
The top of the line Reference tower includes spikes for effective decoupling from the floor and gold-plated terminals for long-term purity of signal transmission. The Reference 61 i adds a second 210 mm APG woofer to the driver complement found in the Reference 51 i, further extending low frequency response and power handling with two woofer voice coils to share the workload.
The 25 mm APG-coated dome tweeter minimizes break-up of the radiating surface across its operating range for smoother, more natural high frequency response with very low distortion. The mechanically isolated 25 mm unit reproduces the midrange with outstanding clarity and definition.
The Reference 61 i brings music to life with a new fullness and richness.
Note: Include spiked feet.

Specifications:
Model:  Reference 61i
Frequency Response: 35 Hz - 25,000 Hz, (±3 dB)
Crossover:  350 Hz / 3 kHz
Sensitivity (2,83 V / 1m):  92 dB
Nominall Impedance:  6 Ω
Power Handling:  35 - 200 watts
DRIVERS:
High Frequency:  Tweeter  25 mm
Mid Frequency:  Midrange 130 mm
Low Frequency:  Woofer  2 x 210 mm
Vinyl Cabinet Finish:  Chatsworth Oak/ Black Ash
Dimensions (HxWxD):   1070 x 274 x 310 mm


Infinity Reference Series 51i


Reference 51 i
The Reference Series floor-standing three-way system employs the same driver components and technology as the Reference 41 i, but in a larger enclosure with increased internal volume for deeper, punchier bass. The extended low frequency response and higher levels of clean, solid bass from the Reference 51 i add a more realistic physical dimension to your listening enjoyment, regardless of musical style.
The carefully sculpted tweeter faceplate provides exceptional linearity across the driver's operating range combined with ideal vertical and horizontal dispersion, while the 130 mm midrange unit, installed in its own air-tight compartment, delivers resonant-free spacious sound in this critical frequency range.
Note: Include spiked feet.

Specifications:
Model:  Reference 51i
Frequency Response: 38 Hz - 25,000 Hz, (±3 dB)
Crossover:  400 Hz / 3 kHz
Sensitivity (2,83 V / 1m):  92 dB
Nominall Impedance:  6 Ω
Power Handling:  25 - 150 watts
DRIVERS:
High Frequency:  Tweeter  25 mm
Mid Frequency:  Midrange 130 mm
Low Frequency:  Woofer 210 mm
Vinyl Cabinet Finish:  Chatsworth Oak/ Black Ash
Dimensions (HxWxD):   890 x 274 x 275 mm


Infinity Reference Series 41i


Infinity Reference 41i
The three-way bookshelf model in the Reference Series offers gold-plated five-way binding posts and incorporates APG cone technology in all three drivers. The 210 mm woofer and 130 mm midrange utilize graphite-coated APG cones for lower moving mass and the 25 mm tweeter's textile dome is APG-coated. The tweeter's catenary profile provides maximum stiffness at the tip of the dome for nearly perfect pistonic motion with no out-of-phase break-up at the tip.
With three drivers, including the ferrofluid cooled tweeter, the Reference 41 i is capable of enhanced power handling for higher maximum sound pressure levels at no compromise in sound quality.

Specifications:
Model:  Reference 41i
Frequency Response: 40 Hz - 25,000 Hz, (±3 dB)
Crossover:  400 Hz / 3 kHz
Sensitivity (2,83 V / 1m):  92 dB
Nominall Impedance:  6 Ω
Power Handling:  20 - 125 watts
DRIVERS:
High Frequency:  Tweeter  25 mm
Mid Frequency:  Midrange 130 mm
Low Frequency:  Woofer 210 mm
Vinyl Cabinet Finish:  Chatsworth Oak/ Black Ash
Dimensions (HxWxD):   600 x 274 x 276 mm

Mordaunt-Short Festival series 2


Festival Series 2
Comprising the DSB 208 bass-and mid-frequency transducer and a dome tweeter whose upper response extends smoothly beyond audibility, the Festival Series 2 is a sensitive, versatile, high -performance system of exceptional "musicality".
With its extended bass response, high power handling and low distortion, the festival Series 2 is therefore as eminently suitable for use in sophisticated high power installations as in smaller or more limited systems.

Features
System design - compact, infinite baffle enclosure. For use shelf-mounted horizontaly or verticaly
Cabinet - 15 mm high-density board construction. Sides wood-veneered with internal balancing veneers; rear spray-finished neutral fleck.
Grille - acoustically transparent, deep brown woven fabric on 9 mm board frame with nylon stud fastenings.
Cabinet finish - selected teak or walnut veneer.
Transducers - DSB for bass/mid frequency and for high-frequency 19 mm wide dispersion synthetic dome
Dividing network - high grade, ferrite core inductors and low-loss, close-tolerance capacitors on printed circuit board.
Electrical connection - terminal moulding incorporating both standard DIN socket and spring-loaded push-button connectors for stripped wire ends. Plugs and leads supplied.

Specifications
Nominal Frequency Range:  35 - 25 ,000 Hz
Specific Frequency Response:  75 - 20,000 Hz  ±3 dB
Impedance:  8 Ω nominal
Sensitivity:  6,7 V RMS (5,6 watts) to produce 96 dB/1m in anechoic conditions using pink noise.
Maximum Sound Pressure Level:  109 dB in typical listening room
Continous Power Compatibility:  10-90 watts per channel. Amplifiers of higher power may be used with care.
Distortion:  Substantia;;y lesss than 1% Total Harmonic Distortion within frequency range 150-25,000 Hz at 6,7V rms input (nominal 96 dB sound pressure level)
Fundamental System resonance:  75 Hz
Dividing Frequency:  3,500 Hz
Filter Characteristics (less tahn 0,1% Total Harmonic Distortion throughout entire frequency range at maximum input):
Low Pass :  12 dB/oct
High pass :  18 dB/oct
Dimensions  (H x W x D):  455 x 280 x 185 mm ( 17-7/8" x 11" x 7-1/4")
Weight :  6,4 kg (14 lbs, 1 oz ) single speaker unpacked


Arcam Alpha 2 amplifier


The improvements that have been taking place in turntables, CD players, and loudspeakers demand a new level of performance from the amplifier - the heart of every hi-fi system. The discerning buyer expects that today's amplifier should combine a natural yet dynamic and powerful sound quality with good looks and ease of operation. above all, the amplifier's standard of manufacture and quality control should promise years of consistent, trouble free performance.
Until now, only a handful of designs were able to meet all of these stringent criteria. Unfortunately the prices of amplifiers in this select group often made them incceassible to those on a limited budget. Arcam, recognising this unfulfilled demand, has now designed and produced  a modern, top quality amplifier that is truly affordable - the Arcam Alpha 2.
Offering many of the sonic benefits of more expensive models, the Arcam Alpha 2 would be regarded as a fine amplifier at any price. However, when its outstanding performance, facilities and construction are compared with other amplifiers at its price level, it is clear that the Alpha 2 is destined to become a classic, setting the new standards by which all others will be judged.

Philosophy
The Arcam Alpha 2 is a product of Arcam's many years of experience in amplifier design and manufacture. Detailed theoretical analysis and extensive listening have produced a design that is technically outstanding. This design has been realised in practice using high quality components selected for optimum electrical and sonic performance. The result is an amplifier that maintains the full dynamics of a musical performance while reproducing the subtleties and emotion both accurately and naturally.
Power
Not only does the Alpha 2 produce a generous 30 watts continuous output per channel into 8 ohms,  but its special high peak current output stage will drive loudspeakers whose impedance dips as low as 2 ohms. Unlike many other amplifiers the Alpha 2 can be run continuously at high levels because its coolrunning aluminium chassis will not overheat.
Versatility
As well as working properly with all commonly available loudspeakers, the Arcam Aplha 2 is fully compatible with a wide variety of programme sources. Five inputs are available; four are selected by a rotaty switch and the fifth by the nearby tape monitor button. all the inputs use a high quality and robust design of phono socket.
The Alpha 2's cartridge input is specialy optimised for use with any moving magnet cartridge or high output moving coil cartridge. The highest quality low output moving coil cartridges can also be accommodated using our optional plug in MCA pre-pre-amplifier board.
There is a dedicated input for a CD player, further inputs for a Tuner and Video playback and finally a set of line level input and output sockets suitable for use with a tape recorder.
Fexibility
A quality domestic hi-fi amplifier can and should possess those genuinely useful facilities which can improve the performance of the complete system. Typical of Arcam's attention to detail is the Alpha 2' volume control which has been psychoacoustically designed to allow ease of adjustment at the low volume levels often used in the home. limited range bass and treble controls of advanced design are also provided. These allow precise adjustment of the frequency extremes without coloration of the critical midfrequency band. Used sensibly they can help correct for imperfections elsewhere in the system, particularly those associated with cartridges and loudspeakers. The constant power law balance control also helps in this respect. The tone and balance controls all have a centre click stop to provide a reference response in the centre position.
The Alpha 2 has a front pabel socket which will suit a wide variety of stereo headphones. The headphones and loudspeakers will normally work together as the main loudspeaker sockets are wired directly to the amplifier's output to obtainthe best possible sound quality. However  a second pair of loudspeaker socket is also fitted enabling the loudspeakers to be muted automatically whenever headphones are plugged in.

Electronic Design
The disc pre-amplifier uses a low noise professional IC and employs audiophile grade 1% metal film resistors and polypropylene capacitors in the critical RIAA equalisation network. This ensures a clean, accurate sound.
Uniguely the Alpha2 is also configurated to accept out plug in moving coil cartridge pre-pre-amplifier board, the MCA. The MCA and Alpha 2 combination has a much lower noise level and correspondingly greater fidelity than other similarly priced amplifiers. This allows the Alpha 2 to be used successfully with some of the world's finest MC cartridges.
All other inputs are fed directly to the Alpha 2's volume control to ensure a virtually infinite overload margin. The preamplifier stages which follow the volume control again employ low noise professional quality ICs and make minimal use of coupling capacitors to avoid degradation of the sudio signal. All preamplifier circuits are powered by two lownoise, low-impedance regulated power supplies.
The Arcam Alpha 2's power amplifier is an advanced bipolar, high slew-rate design with direct coupled fully complementary class AB output stages. Constant bias circuitry for the driver transistors maintains a clean, dynamic output throughout the entire operating range. The amplifier has a very high transient current capability, made possible by use of 100 watt power transistors combined with high value low ESR reservoir capacitors and a generously rated toroidal mains transformer. Together these permit instantaneous peak output levels of some 250 watts from a single channel into a 2 ohm load. Nevertheless the amplifier is effectively protected against overload. readily accessible fast-blow output fuses are also fitted for loudspeaker protection. They are connected within the main  feedback loop to prevent degradation of the signal. In addition the layout of the PCB has been optimised for such factors as maximum transient power capability and minimum on-board interaction.
Finally, the loudspeaker outputs use ultra high quality PCB mounted 4 mm sockets. These employ silver loaded contacts amd are soldered directly to the PCB to ensure integrity of the signal path. High quality matching plugs are supplied as standard.

Specifications
Output Power: 
30 W  - both channels into 8 ohm (20 Hz - 20 kHz at 0,5%THD)
40 W  - single channel at 1 khz into 8 ohm
60 W  - single channel at 1 khzinto 8 ohm
Total Harmonic Distortion:  0,02% (at 25 W into 8 Ω at 1 kHz)
Overload Margins: 
Disc Inputs :  32 dB at 1 kHz
Other Inputs :  50 dB
Frequency Response:
Disc Input :  60 HZ - 20 kHz , ±0,5 dB, -3 dB at 20 Hz
Other Inputs :  30 Hz - 20 kHz ±0,5 dB, -1 dB at 20 Hz
Tone Controls:
Bass :  +-8 dB at 50 Hz
Treble :  +-8 dB at 15 kHz
crosstalk:  -65 dB at 1 kHz
Disc Inputs:
Suitable for MM and high-output MC cartridges
Sensitivity :  2,5 mV
Noise :  -72 dB
impedance :  47 k Ω  in parallel with 100 pF
With MCA board fitted, for low output MC cartridges
Sensitivity   250 µV
Noise :  -70 dB
Impedance :  330 Ω
Tuner, TApe, Video :
Sensitivity :  200 mV
Noise :  -95 dB
Impedance :  25 k Ω
CD
Sensitivity :  450 mV
Noise :  -95 dB
Impedance :  10 k Ω
Outputs Nominal Level/Impedance
Tape :  220 mV/2 k Ω
Headphones :  suitable for 8 Ω  - 2 k Ω  impedance
Loudspeaker:  30 W into 8 Ω  at 1 kHz
low frequency daming Factor :  200
Suitable for speaker of 4 Ω  or higher nominal impedance
General
Power Supply:  240 V , 110 V ; 50/60 kHz
Power Consumption :  120 VA
Spares Provided
Two loudspeaker fuses;
Two red and two black 4 mm plugs
Dimensions (W x H x D):  430 x 230 x 84 mm (16,9" x 9,1" x 3,3")
Weight:  4 kg (8,8 lbs)