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

Audio Innovations Alto amplifier

 Audio Innovations has a long established range of high quality audio equipment. The marque has founded its reputation on a range of widely acclaimed valve amplification. It has always been the ambition of Audio Innovations to manufacture products with the best possible performance at any given price. To date, this has precluded the use of transistor circuitry as it was not felt to offer equivalent performance to similarly priced valve designs.

In recent years there has been widespread demand for an entry level Audio Innovations amplifier that would combine the performance for which the company aesthetic elan. The Alto is the response to that demand. It is an affordable high quality amplifier dedicated for use with Line Level sources. The experience gained during the evolution of the highly regarded L2 Line pre-amplifier emphasised the importance of handling these higher level signals with particular care. It is vital that the input selection, attenuation and following gain stage are designed to minimise compression and corruption of the signal while at the same time allowing it to be coupled with unrestricted bandwidth to the power stages of the amplifier.

Audio Innovations places great emphasis on reproducing music with a high level of tonal and dynamic coherence. This consistency, regardless of level or pitch, is fundamental to the accurate reproduction of instrument timbre and is absent in almost all transistor electronics. The Alto circuit configuration addresses the key areas where problems occur while its inherent simplicity allows a more faithful representation of the music to be presented to the loudspeakers.

Internally the Alto is constructed to the same exacting standared as our more expensive valve amplifiers. The circuit boards is CAD "in house" designed. Close tolerance metal-film resistors and high quality signal coupling capacitors are used throughout. Input sockets are gold plated and the bi-wireable speaker terminals are heavy duty binding posts which will accept banana plugs, spades or bare wire.

The Alto ofers the facility to operate up to four line inputs as well as two tape recorders, and will therefore integrate easily into most domestic audio systems. With looks and performance that belie it's price the Alto represents a genuine alternative for the style conscious audio enthusiast.
Output Power (at 1 kHz , 8 Ω ):  35 watts
Input Sensitivity (full Power):  265 mV RMS
Input Impedance:  47 k Ω
Frequency Response:  20 Hz - 100 kHz (-3 dB)
Speaker Impedance: 4 to 16 Ω
Inputs (Line Level):  4
Tape Loops: 2
Max. Power Consumption:  400 watts
Dimensions (W x H x D):  430 x 300 84 mm
Weight:  6,5 kg (shipping)

Audio Innovations - The First Audio Amplifier

The Audio Amplifier Series from Audio Innovations challenges a number of traditionally held beliefs, the most fundamental of which is the insistance that inn order for an amplifier to have a sufficient dynamic range, it must have a very high static power output. The second main misconception is that the amplifier must have low distortion; the third being the bandwidth nevessary to reproduce the audio apectrum.
The First Audio Amplifier is the first amplifier to significantly deviate from these design criteria. It is also first commercially available amplifier using the Direct Heated Triode, this being the most linear and load tolerant amplifying device available.

Special Features and Facilities
7,5 watt Pure Class A
Direct Heated Triodes type 684G or 2A3
No overall or local feedback employed
Fully hardwired circuit. No Printed Circuit Board
Handmade paper in oil capacitors for best possible signal transfer.
Non-magnetic resistors
Signal input wired with Audio Note 99,99% pure silver cable type AN-S
Cathode biased output stage
4 Ω , 8 Ω , 16 Ω output impedances, switchable on the back fascia

Rotel RCD-930AX CD player

Features of the RCD-930AX
This CD player uses a Pulse Width Modulated 1 Bit Dual Digital to Analog Converter with a Second Order Delta Sigma noise Shaping Circuit. This is followed by a digital filter equivalent to 8x Oversampling. RCD 930 AX ia a good sounding CD player that will offer a lively, entertaining source of music for your stereo system.
The Display is designed to be very informative . It will provide more information if you require by pressing the appropriate buttons on the front panel or on the  remote control. The Remote control duplicates all of the controls on the front panel and also has Direct Access keys for the track on the CD.

Frequency Response:  20 - 20,000 Hz ±0,8 dB
Total Harmonic Distortion:  <0 1="" at="" khz="" p="">
Channel Separation:  >90 dB at 1 kHz
Signal-to-Noise Ratio:   >90 dB
Speed Accuracy, Wow and Flutter:  Quartz crystal Accuracy
Digatal to Analog Converter:  1 Bit Pulse Width Modulated
Power Requirements:  AC 115 or 230 Volts 50/60 Hz
Power Consumption:  30 watts
Dimensions (W x H x D):  440 x 72 x 298 mm (17-3/8" x 3-5/6" x11-3/4")
Weight:  4,2 kg (9,2 lbs)

Rotel RA-920AX amplifier

Integrated Stereo Amplifier

Continuous Power Output:  20 watts per channel, min. RMS both channels driven into 8 Ω  from 20 -20,000 Hz with no more than 0,03% Total Harmonic Distortion
DIN Output:  35 watts per channel (1 kHz, 4 Ω , 1% T.H.D.)
Music Power :  75 watts
Total Harmonic Distortion(20 to 20,000 Hz from AUX):
Continuous Rated Power Output :  no more than 0,03%
Continuous 1/2 Rated Power Output :  no more than 0,03%
1 Watt per Channel Power Output, 8 Ω  :  no more than 0,03%
Intermodulation Distortion (60 Hz :7 kHz = 4:1)
Continuous Rated Power Output :  no more than 0,03%
Continuous 1/2 Rated Power Output :  no more than 0,03%
1 Watt per Channel Power Output, 8 Ω  :  no more than 0,03%
Output Impedance
Speaker :  4 Ω  minimum
Headphone :  8 - 2,000 Ω 
Damping Factor:  180 ( 20 - 20,000 Hz 8 Ω  )
Input Sensitivity/Impedance:
Phono :  2,5 mV/47 kohm
CD, Tuner, Tape Aux :  150 mV/20  k Ω
Overload Level (T.H.D. 0,5%, 1 kHz)
Phono :  180 mV
CD, Tuner, Tape, Aux :  5 V
Frequency Response:
Phono :  20 to 15,000 Hz ±0,3 dB (RIAA standard)
Cd, Tuner, Tape, Aux :  10 to 40,000 ±1,0 dB
Tone Control
Bass :  ±6 dB at 100 Hz
Treble :  ±6 dB at 10 kHz
Signal-to-Noise Ratio (IHF, A network)
Phono :  78 dB
CD, Tuner, Tape, Aux :  98 dB
Requirement:  120, 220, 240 V 50/60 Hz
Consumption:  120 watts
Dimensions (W x H x D):  440 x 92 x 304 mm (17-3/8" x 3-5/8" x 12")
Weight:  5,1 kg (11,2 lbs)

Kenwood KL-777 loudspeakers

To reproduce in clear sound without distortion anything from the earth-shaking basso profundo of pipe organ to delicate overtone of a violin or the sharp sound of cymbals … this is the requirement speakers  must fullfill as an outlet for sound, . In its challenge to surmount this difficult objective, Kenwood so far has marketed numerous excellent speaker systems.
Based on our ampie past experiences, we now have completed the model KL-777, a power ful 15", 4-way , 6-speaker system.
The large diameter 15" woofer rock beautifully reproduces basso profundo which will even rock the room. Treble and mid-range are handled by two squawkers and two tweeters. A full range of ultra-high frequencies is freshly reproduced by new acoustic material called "mylar film" used in the corn type super tweeter.
The front grille is of the "bow line" design giving the set a classic appearance to accent a room-interior. When the grille is removed, it will show the buffle of refined finish, on which the level control is attached for adjustment of tone quality suitable for the room.

The newly developed powerfull 15", free-edge type woofer reproduces the fundamental a area with minimum distortion. This woofer, being specially designed for the air-suspension model, has successfully been made compact cabinet for the 15" class. The effective range is 800 Hz or below.

The most important range of 800 Hz - 5,000 Hz in music is reproduced by two 5" cornt-type mid-range, parallelly connected. They richly reproduce the mid-range. Being parallelly arranged, their allowable input has been increassed and effixiency improval.

Horn Tweeter
The two horn tweeters, which reproduce treble crisply, are parallelly arranged for improved directivity and increassed allowable input.

Super tweeter
The new acoustic material called "Mylar film" is used in the super tweeter which handles the cone above 10,000 Hz. The normal corn using fiber material is somewhat non-uniform in inner structure due to directional peculiarities of fiber. This is apt to cause split vibrations at high keys.
"mylar film" being of even and uniform structure does not give split vibrations at high keys. Also, because a small quantity is used, ultra-high frequencies beyond the audio frequency can be beautifukky reproduced without distortion.
It being of small diameter and corn type, the directivity is also greatly improved.

The network may appear to be of little relation to the tone quality. However, it could cause distortions near the crossover points or damping inferiority in ultra low frequencies. Model KL-777 takes a full scale network of 12 dB/oct with the ferrite core which gives less magnetic loss. The copper wire used for voice coils can  amply endure the overload and help avoid distortions due to interventions near crossovers or damping inferiority in ultra-low frequencies.

Tone Selector
The tone selector is positioned in the front panel for easy operations.
"Soft" tone is suitable for room in which there is insufficiency in bass or where treble along are reflected.
"Clear" tone is for a boomy room which has insufficient absorption of bass or in which treble alone are absorbed.
"Normal" tone is for a normal room which may be say, in between the above two.

The front grille is of the "bow line" design giving a classic and calm appearance as an accent for the room interior.
Despite the large woofer used, it is comparatively compact and slim facilitating free setting. The front buffle is finely finished and, thus, one may remove the front grille and enjoy its professional appearance. The grille can be easily removed by hand.

Allowable Input
With its maximum input of 100 W, it is capable of reproducing large sound. Further, it can be safely used in combination with an amplifier of large output.
The air-suspension type model is considered characteristic and advantageous with its compact enclosure and capability to reproduce ultra-low frequencies. In contrast, however, its sensitivity is not favorable. Therefore, unless an amplifier of a large output is used, it might not effectively perform its function.
Unlike other air-suspension type models, the KL-777 has gained high sensitivity of 102 dB and can fully perform the function with and amplifier of small output.
Speaker terminals
The one-touch connection terminal has been newly adopted for simple yet firm connection of cords.

Mounted Speakers:
Woofer :  15" free edge type
Mid-range :  2 x 5" corn type
Tweeter :  2 x Horn type
Super Tweeter :  Corn type
Enclosure:  Acoustic suspension type
Maximum Input Power :  100 W
Sensitivity:  102 dB
Frequency Response:  25 - 22,000 Hz
Crossover Frequency:  800; 5,000; 10,000 Hz
Crossover Network:  12 dB/oct
Impedance:  8 Ω
Dimensions (W x H x D):  16-1/4" x 25" x 11"
Weight:  49,4 lbs
Special Features:  Built-in 3-step tone selector

Chartwell PM 100 loudspeakers

The Chartwell PM100 loudspeaker system is a breakthrough in compact loudspeaker design and is intended for use in situstions where space is at a premium, but musical accuracy must not be compromised.

Many small loudspeaker systems suffer from lack of deep bass response and their acoustic  output is unnaturally coloured in the mid-range, but Chartwell research engineers have developed a bass-reflex cabinet incorporating a ducted  port enabling natural reproduction of sound throughout the entire sudio spectrum down to 50 Hz and below, a frequency not always accomplished by speakers several times the size of the Chartwell PM 100.

A 25 mm soft-dome radiator HF unit and a new specially developed long-throw 165 mm bass/mid bextrene cone unit are combined with a 10 element crossover network. More than usual care has been taken in the crossover network design to ensure the input impedance of the system does not vary significantly over the audio frequency range. This reduces the demand on the driving amplifier which would be less liable to break into instability. All these factors ensure that the very high standard which has become the hallmark of Chartwell products is maintained.

Drive Units: 
Bass/Mid :  165 Chartwell
High :  HD12-9D25 Son-Audax (modified)
Crossover Frequency:  3,000 Hz
Power handling:  40 watts RMS. Suitable for amplifiers rated up to 100 W on speech and music
Frequency Range:  50 Hz - 20 kHz ±3 dB
Nominal Impedance:  8 ohms
Cabinet Volume:  15 litres
Dimansions (W x H x D):  240 x 460 x 205 mm
Weight:  7,5 kg
Finish:  teak, Walnut, Rosewood, Black oak


Fully-Automatic Quartz Turntable
Coreless DC Motor with Quartz Servosystem
JVC Super Servo Frequency Generator
Variable "Q" Oil-Damped Tonearm
Fully-Automatic Arm Operation with Memory Repeat
Front Operation Convenience

The JVC QL-F6 is full of new and useful features. Namely, for higher speed accuracy, we've added another speed-correction system to the renowed JVC Quartz servosystem. For higher tracking accuracy, we've added a new oil damping system to our New Gimbal Support. And for low acoustic feedback, we've used a bottom board made of newly-developed H.D.P. compoud - heavier and more solid than conventional plastics - in combination with a solid aluminum die-cast cabinet. Further improvements are made even in the smallest of parts. What improvements do they offer your ears? Here the QL-F6 at your nearest dealer - your ears will know the answers.

Variable "Q" Oil-Damped Tonearm.
The tonearm of the QL-F6 is on JVC's New Gimbal type support, known for low friction and high sensitivity. But JVC has made its performance even better by adding to it our new variable "Q" oil damping system. Advantages are:
1) Damped "Q" (low-frequency resonance) results in better tracking
2) Sensitivity is high, with the support critically controlled
3) The user never needs to replace or replenish oil
4) Resistance to acoustic feedback is higher
5) The "Q" can be adjusted by a pair of controls - one for horizontal and one for vertical - to match the cartridge's compliance.
JVC'scomputer-asisted "K&K Method" was the creative force behind this innovative development.

JVC's New Double-Quartz Servosystem
In addition to the conventional JVC Quartz servo- the one that incorporates a phase comparator - there's another Quartz servosystem inside the QL-F6; the F-V converter makes the use of reference Quartz crystal rather than a more conventional reference voltage generator. Thus the rock-steady platter speed is made still more accurate. You cannot find another turntable offering steadier and more reliable speed control.

JVC's coreless motor is accurately controlled by these two dependable servos to rotate the platter with unimpeachable constancy. Besides, it vibrates very little and generates high torque (1,2 kg/cm) for a coreless motor, thanks to the newly-developed push-pull drive circuit. Finally, the JVC Super Servo FG (Frequency Generator) is built inside the motor to detect any speed error and help keep the platter spinnung accurate, always.

Motor Section
Motor:  Coreless, DC type, FG servomotor
Servo System:  Phase-locking to the quartz oscillator
Drive System:  Direct drive
Speeds:  33- and 45 rpm
Fine Pitch Adjustable Range:  +_6%
Wow and Flutter:  0,025% (WRMS)
Signal-to-Noise Ratio:  more than 78 dB (DIN-B)
Speed Detection:  Frequency generator
Starting Torque:  more than 1,2 kg-cm
Speed Deviation:  within 0,002%
Load Characteristic:  0% (with 170g total tracking force)
Drift:  0,0001 %/H
Power Characteristics:  0% (±10 V)
Temperature Characteristics:  0,00005 %/C
Platter:  32,7 cm
Tonearm Section
Type:  Statically-balanced oil-damped tonearm
Effective Arm Length:  233 mm
Overhang:  15 mm
Weight Range Including Headshell:  13 - 20 g
Cartridge Section
Type:  Moving magnet (MD-1025EB)
Frequency Response:  10 Hz - 25,000 Hz
Output 3 mV (1 kHz)
Channel Separation:  25 dB (1 kHz) load Resistance:  47 - 100 k Ω
Dynamic :  10 x 10¯⁶ cm/dyne
Static :  30 x 10¯⁶ cm/dyne
Stylus:  Dt-ZIEB, 0,3 x 0,7 mil (diamond, elliptical)
Optimum Tracking Force:  1,75 g ±0,25 g
Supply :  AC 110/ 120/ 220/ 240 V, 50/60 Hz
Consumption :  15 watts
Dimensions (W x H x D):  456 x 142 x 400 mm
Weight:  11 kg

JVC L-A11 turntable

Auto-return Belt-drive Turntable

Dependable Auto-Return/Shut-Off Operation
Front-Control Convenience
JVC's Four-Pole Synchronous Motor
High-Sensitivity Tonearm
Low-Howl Cabinet

This dependable JVC model offers the hi-fi performance you've been listening for. And auto-return/shut-off operation, too. The precision motor on a refined belt-drive system, the precision tonearm - these two work together to give you the kind of sound you'd expect from a much more expensive turntable. Add to these the convenience of up-front control and the record protecting, energy-saving, auto-tonearm return and you're ready to enjoy your kond of music, your way. And the JVC L-A11 is not an "ears-only" model, its slim profile and attractive finish are delights for the eyes, too.

Auto-Return / Shut-Off Convenience.
Place the stylus on the first groove of your favorite record, then sit back and enjoy the music - leaving the rest to the automatic mechanism of the system. This uncomplicated mechanism permits the stylus to track freely (as on any first-class manual) until the stylus enters the lead-out grooves of the record. Or, until you trigger the Reject control.
If you desire, you can use the JVC L-A11 as a manual; put the stylus on the groove of your favorite selections, regardless of the arranged sequences of the record. Use the oil-damped Cue lever to avoid accidents. For further convenience, the Reject control is up front, you can send the tonearm home even with the dust cover closed

Low-Rumble Belt-drive System
A four-pole synchronous motor is coupled with a time-tested belt-drive system in this unit for silent and reliable operation. It maintains very close tolerance in speed accuracy regardless of changes in loads or power voltages, wow and flutter is less than 0,06% (WRMS) and the Signal-to-Noise Ratio better than 63 dB (DIN-B). The platter is die-cast of nonferrous material for ideal smooth rotation. You hear only what's on the record , not what's under it.

No Acoustic Feedback, No Muddiness
Muddiness in bass notes is caused by poor insulation and suspension of the motor, cabinet and tonearm of a turntable. Never will you be forced to hear it, for we've provided the JVC L-A11 with a number of features to end low-frequancy Muddiness, shutting out all acoustic feedback.
First, the cabinet is made of a special HDP (High-Density_Pararesonance) compoud with high specific gravity and fast resonance-attenuating response. Second, special configuration insulators are on the bottom of the turntable to resist sympathetic vibrations, particularly from a lateral direction.

High-Sensitivity Tonearm and more.
JVC has developed a new Dual-Contact Angular Bearing. It makes the tonearm more sensitive than usual. It also reduces mechanical error. You're assured of accurate stylus tracking over years and years. The arm rides on the statically-balanced support; mistracking, distortion, channel imbalance, undue record wear are all avoided. Also provided on the turntable are: anti-skating device, and direct-readout tracking-force dial.

Motor Type:  4-pole synchronous
Drive System:  Belt - drive  system
Speeds:  33-⅓ and 45 rpm
Wow and Flutter:
Less than :  0,006% (WRMS)
Less than :  0,008 (DIN)
Signal-to-Noise Ratio :  better than 63 dB (DIN-B)
Platter Diameter:  300 mm aluminum alloy die-cast
Tonearm Type: Statically balanced arm
Effective Length:  220 mm
Tracking Error:  +3,35  - -0,43
Overhang:  15 mm
Applicable Tracking Force:  0 - 3 g
Applicable Cartridge Weight:  14,5 - 18,5 g (including headshell weight)
Operation Mode:  Auto return
Dimension (W x H x D):  438 x 143 x 380 mm
Weight:  4,5 kg

Empire 598 III turntable

The Motor Section
A self-cooling, hysteresis synchronous type with an inside out rotor, drives the platter with enough torque to reach full speed in one third of a revolution. It contributes to the almost immeasurable 0,004% average wow and flutter value in our specifications.
Belt Drive system
Every turntable is apcked only when zero error is achieved in its speed accuracy. To prevent any variations of speed we grind each belt to ±.0001 inch
The Platter
Every two piece, 7 lb, 3 inch thick, die-cast aluminum platter is dynamically balanced. Once in motion, it acts as a massive flywheel to assure specified wow and flutter value even with the voltage varied from 105 to 127 volts AC.

The Main Bearing
The stainless steel shaft extending from the platter is aged, by alternate exposures to extreme changes in temperature, preventing it from ever warping. The tip is then precision ground and polished before lapping it into two oillite, self-lubricating bearings, reducing friction and reducing rumble to one of the lowest figures ever measured in a professional turntable; 63 dB CBS ARLL

The Suspension
Piston damped, 16 gauge steel coil springs cradle the arm and platter. You can dance without your stylus joining in.
The Tonearm
The aluminum tubular design boasts one of the lowest fundamental frequencies of any arm, an inaudible 6 Hz. Acoustic feedabck is unheard of, even with gain and bass turned all the way up. The vertical and horizontal bearing friction is 1 milligram. This allows the arm to move effortlessly, imposing only the calibrated anti-skating and tracking force you select.
The Cartridge
Empire's best, the 4000D/III, wide response cartridge is a standard feature. The capabilites of this cartridge allow you to play any 4 channel or stereo record at 1 gram or less. And the frequency response is an extraordinary 5 - 50,000 Hz , with more than 35 dB channel separtaion.

The Controls
The coordinated anti-skating adjustment provides the necessary force for the horizontal plane. It is micrometer calibrated to eliminate channel imbalance or unnecessary record wear.
Stylus force is dialed with a calibrated clock mainspring more accurate than any commercially available stylus pressure gauge.
A true vertical cueing control floats the tonearm up or down from a record surface bathed in light.

Aiwa AD-1500 deck

Superb Stereophonic Cassette Tape Deck
Aiwa AD-1500 is an epoch making cassette deck created through concentrtion of Aiwa's techniques and offering the highest tone quality and function on the strength of new mechanisms, plus new uses, greater durability, mechanism for preventing misuse, etc.

Superb deck with the Solid Stabilized Transport (SST) system
Equipped with the built-in Dolby ciruit
Permits chromium dioxide (CrO₂) tape use for booth recording and playback
Automatic CrO₂ tape selector device built-in
Uses the newly developed ferrite guard head (FGH)
Provided with Cue/Quick Review Control for speedy replay
Permits mixing for recording
Automatic end stop system

SST System
This is anintegrated system composed of 4 elements
1-Since the pinch roller holder is rightly fixed to the main chassis, the parallel position of the pinch roller and capstan is accurately maintained, and accordingly the tape always runs stably. (Vertical fluctuaction of the tape is prevented and thre is minimum wow and flutter.)
2-Since the tape hub is kept floating by a special reel shaft, no extra friction is added to the torque. Accordingly stable running of tape is ensured.
3-During FWD, the pulley rotates only to the minimum necessary degree, so there is no element to increase wow and flutter unnecessarily.
4-The whole amplifier circuit is driven by power from a stabilized power source, whereby that circuit and of course the delicate Dolby circuit and bias generating circuit are extremely stabilized.

Other Features:
Employ a high weight flywheel
Oil damping elevation system conforming to its luxurious system an oil damping device which elevator the cassette slowly and gently when the cover is opened.
Free stop device of dust cover . Another new feature permits the dust cover to be opened and set at any point you desire.
Removable type free-stop dust cover. Protects the delicate and precise mechanism from dust
Tape-run indicator with light emitting diode. Possible to check tape running at a glence. Service life of the light-emitting diode is semi-permanent.
DIN/PIN autochangeover. Insert PIN cord and it automatically changes to PIN, ever if DIN cord is inserted.
Large size VU meter
Tape illuminator lamp full auto-stop mechanism.

Type:  Hi-fi stereo cassette tape deck
Track:  4-track, 2-channel stereo
Circuit:  36 Transistors; 2 FET, 21 Diodes, 1 Thyristor, 2 veristors, 1 LED
Frequency Response:
Normal Tape :  30 -12,000 Hz
High-Performance Tape :  30 - 14,000 hz
CrO₂, FrCr Tape :  30 -16,000 Hz
Signal-to-Noise Ratio:  60 dB (Dolby On, CrO₂ tape)
Wow and Flutter:  0,07% (WRMS)
Tape Speed:  4,8 cm/sec (1-14/16 ips)
Fast Fprward and Rewind Time:  95 sec. c-60 tape
Recording System:  AC bias
Erasing System:  AC erasure
Motor:  AC Hysteresis Synchronous motor
Head:  Ferrite Guard Head
Input Sensitivity/Impedance:
Miks :  -72 dB/600 Ω  - 10 k Ω
Line :  -26 dB/100 k Ω
DIN Connecter Sensitivity:  0,1 mV/k Ω
Headphone Output Load Impedance:  8 Ω 
Line Output Level/impedance:  0,58 V/ 50 k Ω  (Dolby level)
Rec/Pb DIN Output Level: 0,58 V
Power Supply:  AC 110 - 120 V/ 220 - 240 V; 50/60 Hz
Power Consumption:  15 W
Dimensions (W x H x D):  419 x 152 x 295 mm (16-8/16" x6" x 11-9/16")
Weight:  6,2 kg (13,67 lbs)

Aiwa AD-1300 deck

Stereo Cassette Deck with Dolby System
Aiwa AD-1300
Equipped with Dolby circuit greatly improving the Signal-to-Noise Ratio
Provided with Quick Review/Cue Control for speedy searching the desired tape point
Full Automatic shut-off system
Electronically Controlled DC Servo Motor with Frequency Generator
Slight piano-touch key operation and separate Recording/Playback Volume Controls
Machanical pause convenient for temporary stop and stand-by for recording
Equipped with the newly developed long-life Ferrite Guard head
Three step tape selector switch for the type of tapes used
Index Counter with reset button
Expanded Scale VU Meters
Dubbing DIN-to-DIN Facility
Specially designed Heavy-weight Flywheel
Smoky Plastic Dust cover

Type:  Hi-fi stereo cassette tape deck
Track:  4-track, 2-channel stereo
Circuit:  31 Transistors; 2 FET and 23 Diodes
Frequency Response:
Low Noise tape :  30 -14,000 Hz
CrO₂, FrCr Tape :  30 -16,000 Hz
Signal-to-Noise Ratio:  58 dB (Dolby On, CrO₂ tape)
Wow and Flutter:  0,009% (WRMS)
Tape Speed:  4,8 cm/sec (1-14/16 ips)
Fast Fprward and Rewind Time:  120 sec. c-60 tape
Recording System:  AC bias
Erasing System:  AC erasure
Motor:  DC servo motor
Head:  Ferrite Guard Head
Input Sensitivity/Impedance:
Mikrphone :  -72 dB/600 Ω  - 10 k Ω
Line :  -26 dB/100 k Ω
DIN Connecter Sensitivity:  0,1 mV/k Ω
Line Output Level/impedance:  1,1 V/ 10 k Ω  (Dolby level)
DIN Output Level: 1 V
Power Supply:  AC 110 - 120 V/ 220 - 240 V; 50/60 Hz
Power Consumption:  10 W
Dimensions (W x H x D):  407 x 102 x 261 mm (16-1/16" x 4-2" x 10-9/32")
Weight:  5,1 kg (11,22 lbs)

Royd Prior loudspeakers

In The Prior, flagship model, Royd have created a loudspeaker which not only builds on the famous speed and transparency of the Royd 7 litre range, but also has the ability to play even the deepest bass lines with power and grace.
Previous to The Prior the large cabinets required for full bass reproduction imposed their own signature upon the music, coloyring the sound and destroying the illusion of live performers playing in time and in tune with one another. Reserch here at Royd has led to the virtual elimination of this problem.
The cabinet of The Prior is extensively mass damped, resistively braced and features our new base plate which comprises both steel and filled polyuretheane elastomer. Not only does this spiked foot provide a stable platform for The Prior but it also acts as a "mechanical earth", absorbing cabinet resonances.
Finished in a high quality black ash or walnut veneer, the sloping front panel is not only elegant but also serves to time align the advanced drive units, so enabling The Prior to create a soundstage which  is both wide and deep.

While equally at home with analogue or digital sources The Prior is ruthlessly revealing of faults in partnering equipment and demands the very best in order that its true potential may be realised. In such company this innovative loudspeaker from Royd sets new standards for those who are serious about reproducing music in their homes.

Recommended Amplifier Power:  20 - 150 watts
Sensitivity:  89 dB for 1watt at 1 metre
Peak Power Handling:  150 watts
Nominal Impedance:  8 Ω
Drive Units
LF :  8" cast magnesium chassis woofer
HF :  19 mm dome tweeter Scan Speak
Crossover Frequency:  4 kHz
Bass Resonance Frequency:  42 Hz
Frequency Range:  30 Hz - 20 kHz
Cabinet: resistive reflex design using 8" bass unit in 50 litre enclosure
Cabinet Finish:  Walnut, Black Ash veneer
Dimensions (H x W x D):  945 mm x 265 mm x 370 mm
Packed Weight:  32 kg (per pair)