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

The Fisher 50-C

 The Fisher Master Audio Control, Model 50-C has been designed to specifications so far beyond those of the ordinary unit of this type, that they will long serve as the ultimate standard of comparsion. In flexibility, flawless performance, beauty of appearance and workmanship, the 50-C is a masterpiece. In sctual use, its performance will be limited on;y by the quality of the associated equipment.
 The Fisher Model 50-C features high gain with extreme reserve output voltage. Intermodulation distortion is so low as to be virtually unmeasurable. The self-contained power supply, completely shielded with DC for all filaments, results in a hum level that is inaudible even under extreme operating conditions. The circuit is all-triode, with fully shock-mounted tubes. Cathode-follower input and two cathode-follower output stages assure isolation of all control circuits, plus independence from load conditions, lead lengths, etc. The Model 50-C can be used with any amplifier.
Phonograph Preamplifier:  Has two cascaded triode stages.
Inputs (Total of five):
3 x high-level inputs (0,5 megohm)
1 x low-level magnetic phono input to match all makes of cartridges.
1 x microphone input (2,2 megohms)
Output Impedances (Both recorder and main audio outputs are from cathode followers, permiting lead lengths up to 200 feet. Recommended load  impedance):  100,000 ohms or greater, 7500 mmf or less.
Maximum Gain: 
From high level input:  22,5 dB
From low level input:  50 dB
Harmonic Distortion: 
0,02% at 1 volt,
 0,05% at 5 volts
0,15% at 10 volts
0,4% at 15 volts
Intermodulation Distortion:
0,08% at 1 volt
0,2% at 5 volts
0,5% at 10 volts
1,6% at 15 volts
Frequency Response:  20 Hz - 20,000 Hz  ±1 dB, (with controls in uniform response position)
Hum and Noise level: 
On radio input - better than 100 dB below normal signal (2 volts output) with volume control at zero.
Better tnan 90 dB below normal signal with volume control at maximum.
On phono input -66 dB below output with a 10 mV input signal.
Controls (Total of eight):
Volume Control; operates either conventionally or as a Loudnes Control accurately calibrated to the reciprocal of the Fletcher-Munsen curves
Loudness Control Switch; eliminates loudness compensation when desired
Selctor Switch; has five position (see Inputs above)
Low and High Frequency Equalization Switches; provide independent adjustment of low frequency turnover and high frequency roll-off (16 combinations)
Bass and Treble Tone Controls; produce up to 16 dB of boost or attenuation at 50 and 10,000 cycles respectively. Can be set for uniform response
Power Switch; operates self-contained power supply and three spare AC receptacles.
Five Independent Level Controls; equlize various input signal levels and permit optimum loudness control setting.
Power Supply:  Self-contained and completely shielded, including a full-wave selenium rectifier for B-plus and bridge-type selenium for Dc filaments
Power Source:  105 -125 Volts, 50 - 60 cycles
Tube Complement:  2 x 12 AX7; 1 x 12 AU7
Chassis:  is of etched aluminum

Dimensions (W x H x D):  14¾ x 3½  x 6 inches

The Fisher 400-C

 Model 400-C Stereo Master Audio Control
Has 16 input jacks and 9 controls for any combination of stereo or monaural uses. Provides for stereo tapes, disc, AM-FM, FM-FM, FM Multiplex and mikes; monaural tapes, disc, Am, Fm, TV sound, Short-wave and mike; recording stereo or monaural with monitoring facilities; and, electronic crossover at 650 cps handling monaural program sources into stereo systems for stereo effects. Four outputs in two pairs for stereo or monaural use.
Twelve stage audio circuit with shielded transformer for hum-free performance.  Four AC outputs for driving other equipment. 
Input; Equalization; Output Selector; 3-position Rumble Filter; 3-position Loudness Contour; Volume and On-Off; Channel Volume Balance; Separate Bass and Treble and 4 input Level Adjustments.
Type Set:  AC Operated Stereo Amlifier
Frequency Response:  20 Hz - 25,000 Hz (Uniform)
Distortion:  less than 0,15% (for 2 volts output);  0,3%  (for  5 volts)
Hum and Noise:  Better than 85 dB for high level inputs and 2 volts output;  65 dB for 10 mV low level input and 2 volts output
Tube Complement:  4 x ECC83;  2 x 12 AT7;  1 x EZ80
Power Supply:  110 -125 Volts AC, 60 cycles
Power Rating:  32 Watts, .30 Amp At 117 Volts Ac
Dimensions (W x D x H):  15-1/8 x 9 x 4-13/14 inches

Weight:  10 lbs

Celestion Ditton 120

 The name Celestion has been synonymous with loudspeakers since 1924 ans is today held in high esteem throughout the world by sound engineers and music lovers alike.
The high fidelity loudspeakers detailed  in this article the latest in the famous "Ditton" range and is the  result of extensive research and development carried out in the Celestion laboatories.
Celestion quality is evident throughout the new Ditton 120 and the unrivalled and exclusive Celestion features which have made Celestion "Dittons" world famous are incorporaed into this new system.
 The upper register from 3 kHz to 15 kHz is reproduced faithfully by the renowned HF 1300 treble unit, many thousands of which have been supplied to manufactures for inclusion in monitoring systems. This "pressure" type unit is 1½" (38 mm) diameter and has an exceptionally smooth response due to careful attention to phase correction and acoustic damping.  The very low mass of the diaphragm assembly and the high magnetic flux permit transient response ofa high order. The small area of the diaphragm provides an excellent polar radiation pattern and ensures a highly satisfactory stereophonic image.

The middle-bass register is reproduced by a sophisticated unit of very high quality. The diameter is 5" (120 mm) and a linear diaphragm excursion of up to ½" is possible ensuring correct reproduction of bass notes at all volume levels. The diaphragm assembly is controlled by a massive magnet system having a flux of 50,000 Maxwells which ensures high efficiency and optimum damping.
 The third radiator is a new version of the exclusive Celestion auxiliary bass radiator now known universally as the ABR. This device ensures improved reproduction of low bass notes even with comparatively small enclosure dimensions. The ABR is operative at the lowest part of the register from 35 Hz to 70 Hz and since the work is shared between the two bass diaphragms efficiency is increased and distortion reduced to a vry low order; in short, the ABR ensures true bass.

The electrical system is integrated by an inductance-capacity frequency dividing network which has been meticulously designed to provide a level response.
 The Celestion Ditton 120 reproduces the full audible range and is suitable for connection to virtually all high quality amplifiers. Where cost and size figure the Ditton 120 provides outstanding value and performance. The appearance will please the most fastidious and the smooth and effortless sound quality will delight the musican and connoisseur alike.
 The appearance and finish of the 120 enclosure is excellent. By using a single sheet of veneer to completely enclose the four sides of the cabinet there is a joint running of the cabinet there is a joint running along one edge only; conseguently it will look equally good in whatever position it is placed. The rear is neatly finished with connections provided by means of two colour-coded screw terminals.

 Drive Units and cabinet
1. Treble Unit Type HF 1300, Phase Corrected, Acoustically Damped, Studio Standard ± 2 dB
2. Mid-Bass Unit, Ultra Compliant Suspension, High Flux (50,000 Maxwell) Magnet
3. Auxiliary Bass radiator (known as ABR) maintains output over 35 Hz - 70 Hz band
4. Anechoic wedges eliminate standing waves (concealed), low loss crossover network
Response:  35 Hz to 15 kHz
Max Input:  20 watts (DIN 45 500)
Crossover:  Low loss L/C network at 3,000 Hz
Impedance:  4 - 8 Ω
Treble Unit:  38 mm (1½") Pressure Type
Mid-Bass Unit:  120 mm (5") Long throw
Auxiliary Bass:  120 mm (5") 15 Hz Resonance
Finish:  natural teak or walnut

Dimensions:  17¼"  x  9" x  7¾"

Trio Kenwood HS-1

 Trio Kenwood Stereo Phone HS-1
Stereo phones may all seem to look alike except that some may appear sleeker, perhaps, than others. But here the similarity ends as far as the HS-1 is concerned, and we urge you to prove this to yourself.
Notice how the soft, form-fitting cushions cradle your ears so comfortably, how easily they're adjustable to fit you perfectly, how completely they shut out all external noise.
Compare the marvelous reproduction quality of its exclusive "Mylar-Cone" speakers.  That sound is a true, flat response from 20 to 19,000 Hz covering thr entire sound spectrum. Moreover, its free from reproduction resonance peaks, and this means a lot to your ears for it eliminates ear fatigue. That's why we say "your ears will notice the difference",but only if you'll give them the chance to hear the HS-1
 Special Features
An Ideal Stereo Phone
The HS-1 is the stereo phone for the most discerning audiophile. Its outstanding features …
Superb sound reproduction quality.
Soft,snug-fit, lightweight comfort.
Sleek, smart-looking style.
… are the result of careful attention to details in research and design, and the utilization of the most advanced engineering techniques.
 Special Phone Cord
The HS-1 is equipped with a long, 3 meter phone cord since it is also suitable for professional use because of its outstanding performance quality.

Special Kenwood Speakers
Mylar-Cone speakers are easy on your ears because they feature an exclusive Kenwood damping scheme which eliminates resonant reproduction peaks. The flat impedance and response charcteristics shown are your assurance of true, full range reproduction.

Input Impedance:  8 Ω
Matching Impedance:  4 to 16 Ω
Maximum Allowable Input Power:  0,5 Watts
Frequency Response Range:  20 Hz to 19,000 Hz
Total Distortion:  less than 0,8%
Output Sensitivity:  118 dB at 1 mW Input
Built-in Speakers:  Mylar-Cone Speaker
Connecting Cable:  3 meter long (4 Core Cable with 3P standardd plug)
Weight: 300 g (0,66 lbs) including Cable

Luxman L-505 uX

 LUXMAN have launched the lastest generation of transistor integrated power amplifier, the 3rd verison of the highly rated X series, L-505Ux, with a high output power of 100W(8Ω). This high performance amplifier introduces LECUA (Luxman Electronically Controlled Ultimate Attenuator).
Over the last 15 years, since L-505s was first introduced in 1996, it has experienced 3 model changes.
Now the L-505uX, as the latest full revision model of Luxman 506 series, is avidly expected and popularly supported by audiophiles all over the world.

With an illuminated central oriented VU meter on its solid, symmetrical facia, L-505uX introduces a high accuracy electronically controlled attenuator LECUA and Luxman exclusive high sound quality feedback circuit ODNF(Only Distortion Negative Feedback) high S/N version 2.3, while keeping all the other superb features of Luxman products. As an integrated power amplifier, L-505xU inherits all the excellent features of L-590ax/L-550AX, such as ideal circuit design, chassis construction, wiring and layout.
L-505uX mainly features class-leading high sound reproduction capability, high power amplification, incomparable audio performance and the implementation of updated components, making this multi-functional integrated amplifier supreme in bringing to life your love of music.
Portable A5-sized 2 channel PCM D/A converter
Parallel the primary stage of the unique high sound quality feedback circuit ODNF to its 2nd stage and implement the high S/N version 2.3.
Rated power 100W+100W(8Ω), providing forceful driving ability to all speaker systems.
High inertia power supply with its combination of high regulation power supply transformer and high capacity capacitors (10, 000Μf X 4).
Two high drivability low impedance large speaker relays in parallel.
The input signal will generate the most appropriate and shortest root to the output, contributing to the new design of Beeline construction.
Introducing high sound quality selector·switch IC which is also used in flagship preamplifier C-1000, to improve channel separation and cross talk performance.
regulated power supply with lower switching noise Schottky diode from Japan Inter company
High-accuracy built-in DAIR crystal for the digital input to minimize the jitter of asynchronous processing.
Indicates frequency features via high visibility 3 digit 7segament LED display.
Implements LUXMAN traditional round pattern PCBs and Spiral Wrapshielded wiring and special-made components.
No gold plating process for all internal spiral wire strands and shields but introduce unique OFC cables, making sounds more natural.
Considering the delicate music signal stream, round pattern PCB implements match layout and wiring to pass signals smoothly.
Provide selectable MM/MC phono AMP with high-grade reproduction performance of LP records.
Able to coexist with AV systems and could be used as a stand-alone preamplifier or power amplier via Separate Switch.
Adopt unique roofless chassis construction to reduce the earthimpedance rise caused by chassis eddy currents.
Supplied with 18mm pitch RCA input, RCA outputs and high quality power cord terminated with large plug.
Ultra-thick speaker cable facilitates its installation.
Speaker connectors with in-line layout, compatible with Y-type connectors (A, B2 system).
Larger ventilation slots on its top panel to improve it heat dissipation efficiency.
Adopt latest Luxman standard size(the size of separation AMP series).
AC inlet to connect headphone output connectors or power cord.
Plaster White coloured enclosure, refined linishing processed top panel,front panel meters with LEDs which could be used to illuminate in listening room.
A durable aluminum remote control to control the amplifier and a no-twist construction Luxman standard Power cord JPA-10000 are supplied.

Continuous Outputs:
100 W100 W (at 8Ω),
150 W150 W (at 4Ω)
Input:  Line x 4,  Phono x 1 (MM/MC ) Balance: Line x 1,
Recording Input/Output x 1,  Separate Inputs x 1
Loudspeaker Output:  A,B System (A+B output)
Amplifying Circuit Output:  ODNF2.3
Input Sensitivity / Impedance:
Phono (MM):  2.5 mV / 47kΩ  ,
PHONO (MC):  0.3 mV / 100Ω  ,
LINE:  180 mV / 47kΩ
Harmonic Distortion:
0.005% or less (1KHz/8Ω)
0.04% or less(20Hz - 20kHz/8Ω)
Frequency response:  20 Hz - 100 kHz (+0, -3.0dB)
PHONO(MM): >91 db,
PHONO(MC): >75 db,
LINE: >105 dB
Power Consumption: 270W(rated output), 85W(no signal), 0.4W(idle)
Dimensions (W x H x D): 440 ×178 ×454 (mm)
Net Weight: 22Kg

Yamaha A - S3000 (New classic)

Meticulously designed and beautiful in appearancejust like a musical instrument
As befits a top-end audio component, the A-S3000 gives off the presence of a fine musical instrument, with absolutely no screws or fasteners that can be seen from the outside. Every single aspect of its construction and design exudes master craftsmanship and reflects an obsession with quality—a truly musical quality possible only for Yamaha, a world class musical instrument manufacturer. The amplifier with its refined design has been meticulously finished by the skillful use of advanced processing technologies: integrating the top panel and side wood connection, leaving no gaps while using different materials—metal and wood—for the connection.

Rigid Streamlined Construction provides strict anti-vibration protection, 
and enables shortest cabling routes
The A-S3000 has adopted a newly designed highly rigid double structure construction in order to achieve profoundly pure and accurate audio amplification. The bottom chassis and insulator ward off external vibration, and provide each circuit board a floating structure supported by an independent inner frame, thoroughly eliminating the impact of vibration. And the power source unit, which consists of a power transformer and capacitors, which are major sources of internal vibration, is fixed firmly with a three-dimensional structured inner frame, and is supported solidly by the front panel and the rear panel. The power amp circuit board and the weighty heat sink are attached to the left and right inner frames. The power supply unit and amplifier circuits are thus structurally isolated, achieving an ideal chassis structure which thoroughly blocks the transmission of vibration. Moreover, the inner frame that supports the power transformer is shaped with ample space below it, allowing passage of the wiring to each circuit over the shortest possible route. The newly developed chassis with this innovative structure helps to minimise the length of the signal paths and achieve low impedance, as well as providing high rigidity and anti-vibration benefits. The result is a dramatic reduction in signal loss, for remarkably pure audio amplification.

Left-right symmetrical design for independent pre amp and power amp blocks
The amplifier circuit design features independent pre amp and power amp blocks, and perfect left-right symmetry. Separation of the pre amp, which handles low energy signals, from the power amp, which handles high-energy amplified signals, greatly reduces sound deterioration caused by mutual interference. Moreover, the left-right symmetrical design, which keeps the left and right power stages completely separate, ensures greater channel separation and enhances clarity of the stereo image.

 Exquisite, large level meters reflect the dynamics in the music
Floating and Balanced Power Amplifier with MOSFETs
All-stage balanced transmission
Direct drawing toroidal transformer for complete elimination of signal transmission loss
Exceptionally low impedance through secure screw connections
Superior quality electronic volume control for optimum sound
Discretely configured phono amp
Large toroidal transformer, solidly mounted with independent three-dimensional inner frame
Comprehensive low impedance design, shortened signal paths and copper-plated chassis
Six mm thick top panel made of non-magnetic aluminium plate
Insulators allow use of spikes or pads
Original speaker terminals for high sound quality, as well as beauty and ease of use
Obsessive, meticulous switch design— elaborate, richly textured, easy-to-use
Remote control with simple design and superior texture

Technical Specifications for A-S3000
Rated Output Power
(8 Ω, 20 Hz to 20 kHz, 0.07% THD):  100 W + 100 W
(4 Ω, 20 Hz to 20 kHz, 0.07% THD)150 W + 150 W
Dynamic Power (IHF)
(8 Ω) : 120 W + 120 W
(6 Ω) : 150 W + 150 W
(4 Ω) : 200 W+ 200 W
(2 Ω) : 300 W + 300 W
Dynamic Headroom (8 Ω) : 0.79 dB
Maximum Output Power [U.K. and Europe models only] (4 Ω, 1 kHz, 0.7% THD):  170 W + 170 W
Maximum Effective Output Power (JEITA) [Taiwan, China, Korea, Asia and U.K. models only]
(8 Ω, 1 kHz, 10% THD):  130 W + 130 W
(4 Ω, 1 kHz, 10% THD):  210 W + 210 W
IEC Output Power [U.K. and Europe models only] (8 Ω, 1 kHz, 0.02% THD):  105 W + 105 W
Maximum Power (JEITA) [Taiwan, China and Asia models]
(8 Ω, 1 kHz, 10% THD):  120 W + 120 W
(4 Ω, 1 kHz, 10% THD):  190 W + 190 W
Power Bandwidth (MAIN L/R, 0.1% THD, 45 W, 8 Ω):  10 Hz to 60 kHz
Damping Factor  (1 kHz, 8 Ω)250 or higher
Maximum Input Signal Voltage
PHONO MM (1 kHz, 0.003% THD) : 50 mVrms
PHONO MC (1 kHz, 0.003% THD) : 2.3 mVrms
CD, etc. (1 kHz, 0.5% THD) : 2.80 Vrms
BAL 1/BAL 2 (1 kHz, 0.5% THD)
(BYPASS) : 2.80 Vrms
(ATT. -6 dB) : 5.60 Vrms
Rated Output Voltage/Output Impedance
REC OUT :  200 mVrms/1.5 kΩ
PRE OUT :  1.0 Vrms/1.5 kΩ
Frequency Response
CD, etc. (5 Hz to 100 kHz) :  +0/3 dB
CD, etc. (20 Hz to 20 kHz) +0/0.3 dB
RIAA Equalization Deviation
PHONO MM  ±0.5 dB
PHONO MC  ±0.5 dB
Total Harmonic Distortion
PHONO MM to REC OUT (20 Hz to 20 kHz, 1.2 Vrms) :  0.005%
PHONO MC to LINE 2 REC (20 Hz to 20 kHz, 1.2 Vrms) :  0.02%
BAL 1/BAL 2 to SPEAKERS  (20 Hz to 20 kHz, 50 W/8 Ω):  0.025%
CD, etc. to SPEAKERS  (20 Hz to 20 kHz, 50 W/8 Ω):  0.025%
Signal to Noise Ratio (IHF-A Network)
PHONO MM (5 mVrms, Input shorted) :  93 dB
PHONO MC (500 μVrms, Input shorted):  85 dB
CD, etc. (200 mVrms, Input shorted) :  103 dB
Residual Noise (IHF-A Network) :  33 μVrms
Input Sensitivity/Input Impedance
CD, etc. :  200 mVrms/47 kΩ
PHONO MM :  2.5 mVrms/47 kΩ
PHONO MC :  100 μVrms/50 Ω
MAIN IN :  1 Vrms/47 kΩ
BAL 1/BAL 2 :  200 mVrms/100 kΩ
Headphone Jack Rated Output Power CD, etc. (1 kHz, 32 Ω, 0.2% THD):  70 mW + 70 mW
Channel Separation CD, etc. (Input, 5.1 k Ω Terminated, 1 kHz/10 kHz) :  74/54 dB or higher
PHONO MM (Input shorted, 1 kHz/10 kHz, Vol.:30 dB):  90/77 dB or higher
PHONO MC (Input shorted,1 kHz/10 kHz, Vol.:30 dB):  66/77 dB or higher
Tone Control Characteristics
Boost/Cut (50 Hz) :  ±9 dB
Turnover Frequency :  350 Hz
Boost/Cut (20 kHz) :  ±9 dB
Turnover Frequency :  3.5 kHz
Power Supply
[U.S.A and Canada models]:  AC 120 V, 60 Hz
[Taiwan model]AC 110 V, 60 Hz
[China model] :  AC 220 V, 50 Hz
[Korea model] :  AC 220 V, 60 Hz
[Australia model] :  AC 240 V, 50 Hz
[U.K. and Europe models]:  AC 230 V, 50 Hz
[Asia model] :  AC 220 - 240 V, 50/60 Hz
Power Consumption
[U.S.A and Canada models] :  500 VA
[Other models] :  350 W
Standby Power Consumption :  0.3 W
Dimensions (W × H × D):  435 × 180 × 464 mm (17-1/8 × 7-1/8 × 18-1/4)
Weight:  24.6 kg (54.2 lbs)

Thorens TD-320

 The TD 320 is the logical conclusion of the realisation of the experience that Thorens have made with the development of the world ackowledged "Reference" and "Prestige" turntables, combined with more than 100 years of tradition in the reproduction of music. The Thorens TD 320, a concept with future.
Servo controlled electronic Thorens belt drive
Resonance absorbing MDF chassis
Clean and uncoloured sound
Professional TP 16 MkII tone arm
Friction-free velocity-sensing electronic shut-off
Design of lasting elegance
 The Thorens belt-drive
The Thorens motor drives the turntable platter by means of a rubber belt. The natural elasticity of the belt prevents most motor vibrations from reaching the platter and therefore, the pick-up stylus, in more than 20 years of continouous development, Thorens has reduced the very few disadvantages of belt drive to an absolute minimum and has brought it to level of technical perfection which is not approached by any other system known today.
A particular development is the Thorens acceleration clutch, which prevents the belt from stretching, thus reducing the starting time and eliminating chassis vibration.
Because of the high performance required by descerning listeners, Thorens has decided to retain its own unique belt drive system as long as no better drive system is developed in Thorens laboratories or elsewhere.
 The Thorens floating suspension
Every turntable must be damped by a suspension system to prevent the sensitive pick-up from environmental vibration and from acoustic feedback. If the springs are placed between motor and turntable platter, they than fulfill the additional requirement of decoupling motor vibrations almost completely from the turntable and the pick-up system.
Chassis  1 carries the motor and controls. Chassis 2 which is isolated by three easily adjustable leaf springs carries the platter and tone arm. The chassis of the 320 is made of amedite material which absorbs resonances resulting in cleaner and more precise sound.
Specifications mean very little to how good a turntable sounds.
The selection of the appropriate materials, the individual tuning, and the harmonisation of all the components are decisive in determining the sound quality.
Thorens have been involved in the production of turntables since the existance of records.
 Friction-free velocity-sensing electronic shut-off
As the lead-out grooves of records show a higher pitch - i.e. the grooves are further apart from one another - the tone arm motional speed increases towards the center of the platter. An electronic circuit picks up the signal produced by the change in the tone arm velocity and commands the motor to stop and the tone arm to raise.
The precision associated with Thorens turntables is further emphasised her, since the activation of the auto stop process is not position sensitive, but fully electronic and friction-free.
The Thorens automatic stopsystem also enables the operator to cue with studio precision at any point on a disc, even at the operator to cue with studio precision at any point on a disc, even at the very centre.
Another circuit prevents the activation of the auto stop process when the tone arm is moved by hand over the disc surface.

Specifications TD 320
Drive System:  1 speed belt drive
Motor:  Low voltage 16 pole synchronous motor, with slip cloutch for instantaneous start.
Speeds:  33 and 45 RPM, electronic speed selection
Motor Speed Control:  2 phase generator for synchronous control
Turntable Platter:  3,1 kg zinc alloy, dynamically balanced
Platter Diameter:  300 mm (12")
Wow and Flutter (DIN 45507):  ≤ 0,035%
Rumble unweighted (DIN 45539):  > 52 dB
Rumble weighted (DIN 455539):  > 72 dB
Power Requirements:  17 V max. 140 mA
Mains Voltage:  may be connected to any line voltage and frequency using the appropiate Thorens AC adapter
Power Consumption:  5 Watt
Dimensions (W x H x D):  440 x 170 x 350 mm (cover closed)
Height with cover open:  430 mm

Weight:  11 kg

Thorens TP-16 Mk II

 Professional TP 16 MkII tone arm
For optimum in tracking ability it is not sufficient that a tonearm has a low bearing friction. It is much more important that it has a low effective mass, because high mass prevents the stylus from following the imperfections (warp or ripple) of the record as it should do.
To overcome high effective mass one can increase the stylus force, but this results in excessive record wear.
Precision bell bearings are used in this professiional arm, mking it insensitive to shock and rough handling , ideally used for broadcasting and discotheques. In addition, the TP 16 MkII is a straight arm and not S-shaped. The necessary offset angle is independent of the arm shape. A special surface treatment of the tone armtube absorbs all undesirable resonances of the tone arm.
It will optimise ideally with almost every cartridge.

Specifications TP 16 MkII tone arm
Effective Length:  232 mm
Effective Mass:  7,5 g
Stylus Overhang:  16,4 mm adjustable
Offset single:  23°
Lateral Tracking Error:  ≤ 0,18°/cm of radius
Skating-compensation:  frictionless magnetic assembly
Tracking Force:  by calibrated spring dial adjustment
Bearing Friction:  ≤ 0,15 mN  (15mp) in both planes
Cartridge Mounting:  Standard ½"
Capacitance of cable:  100 pF

Auto-stop:  Opto-electronic

Dynaco SCA-35

 The SCA-35 is a one piece combined pre and power amplifier. It is the best value of all the Dynaco components and can deliver half again as much steady-state power at the audio extremes as many other units adbertised at twice the wattage.
1) Input selector for phono, tape head and three high level sources
2) Exclusive bandpass filter eliminates rumble and scratch without destroying the musical balance
3) Functional, easy to understanad controls make it easy for the whole family to use, with sufficient flexibility for the enthusiiast's subtle adjustments.
4) Speaker terminal connectors provided for driving a center speaker, no other amplification required.
5)Inputs for low and high output magnetic cartridges as well as ceramic cartridge provided
6) Three preassembbled etched circuit boards reduce assembly time, no adjustments of any kind are required
7) Specially engineered Dynaco output transformers have phase reversal frequency in excess of 300 kHz to provide complete stability regardless of speaker load.
8) 120/240 V AC power transformer available on special oreder for overseas use.
 The SCA-35 is a completely proven amplifier. Since its introduction in 1963, literally tens of thousends have been built from kits or acquired factory assembled. Even though an integrated amplifier, it maintains Dynaco's reputation for easy -to-build kits, as attested by High Fidelty Magazine: "Building the SCA-35 offered no problems, and several hours of pleasant diversion, to the kit enthusiast. The printed circuit boards are supplied with parts already mounted, and wiring to them and to the rest of the chassis is fairly simple because of the happy absence of crowded areas. The instruction manual is clearly written and excellently illustrated. Total working time was eight hours."
  The result, the magazine went on, "… is, in a word, an excellent amplifier - especially so in view of its cost"   Kit price in 1971 was $ 99,55 for East and $ 104,95 for West.
Power Output: 
35 Watts RMS both channel driven at 1000 Hz
28 Watts RMS both channel driven at 20 - 20,000 Hz (either channel alone 17,5 Watts RMS from 20 - 20,000 Hz)
Harmonic Distortion:  under 1% at rated output
Intrmodulation Distortion:  under 1% at rated output
Both Harmonic and IM Distortion (decrease as power is decreased): blelow 0,2% at average listening levels.
Frequency Response:  20 - 20,000 Hz ±0,25 dB
Tone Controls:  ±12 dB at  50 Hz and 15 kHz
Input Signal Required (for rated output at 1 kHz):
Phono Magnetic : 4 mV
Tape : 2,5 mV
High Level : 1 V
Hum and Noise:  70 dB below 10 mV on low level inputs; 80 dB down on high level inputs
Front Panel Controls:  Selector, Volume, balance, Bass and Treble
Front Panel Switches:  Stereo/Mono; Loudness compensation; Bandpass filter; Power
Rear Panel Inputs:  RIAA magnetic phono (high and low level); NAB 7½" tape head; Radio; Tape and Spare
Rear Panel Outputs:  8 and 16 Ω speaker; Tape output (unaffected by balance tone and volume controls), Center channel output (no auxiliary amplifier needed), provision for headphone connection, two AC convenience outlets.
Rear Panel Controls:  Dual hum balancing pots
Tube and Semiconductor Complement:  2 x 12AX7, 2 x 7199, 4 x 6BQ5, 2 silicon diodes
Power Consumption:  100 Watts at 120 V, 50/60 Hz (120/240V powertransformer available on special order)
Dimensions  (W x D x H):  13 ½  x 10 ½ x 4 ¼  inches
Weight (shipping):  20 lbs (9,1 kg)

Cover Included:  Charcoal brown baked vinil cover

Tandberg TA 300

 Features Tandberg TA 300
Specifications better than DIN standard 45500
RIAA equalized preamp for magnetic pickup
High- and Low-cut filters
Loudness compensation added to volume control
Inputs for 2 record players and 2 tape machines (tape/monitor function)
Front jacks for 2 stereo headphones
Front input/output for extra tape machine on the TA 300
Microphone amplifier and mixing capability on the TA 300M
Nominal Power Output (0,3% THD at 1kHz, DIN):
2 x 35 Watts RMS into 4 Ω
2 x 25 Watts RMS into 8 Ω
Music Power Output:  2 x 50 Watts into 4 Ω
Harmonic Distortion (power output 1 dB below nominal value and lower):
0,2% at 4 Ω
0,15% at 8 Ω
Intermodulation Distortion:  0,4% (in output  stage at 8 Ω)
Damping Factor:  30 at 4 Ω; 60 at 8 Ω
Power Bandwidth:
15 - 50,000 Hz into 4 Ω
10 - 80,000 Hz into 8 Ω
Frequency response:  15 - 50,000 Hz (-1,5 dB with linear inputs)
Treble Control:  ±17 dB at 10,000 Hz
Loudness:  +12 dB at 10,000 hz
Bass Control:  ±15 dB at 50 Hz
Loudness:  +12 dB at 50 Hz
Low-cut Filter:  -3 dB at 70 Hz (-12 dB/octave)
High-cut Filter:  -3 dB at 7000 Hz (-12 dB/octave)
Channel Separation:
Phono 1 and 2 ; 60 dB
Tape 1 and 2 : 60 dB
Tuner : 65 dB
Signal/Noise-and-Hum (reference 50 mW, nominal input signal, peak values):
Phono 1 and 2 : 55 dB
Tape 1 and 2 : 83 dB
Tuner : 60 dB
Signal/Noise-and-Hum (reference max. power output and nominal signal input) :
Phono 1 and 2 : 60 dB
Tape 1 and 2 : 83 dB
Tuner : 79 dB
Sensitivity (nominal power output at 1 kHz into 4 Ω)
Phono 1 and 2 : 2,5 mV
Tape 1 and 2 : 75 mV
Tuner : 60 mV
Power requirements:  Selector for 115/220/240 V Ac, 50 or 60 Hz
Power Consumption: 10 - 180 Watts
Dimensions (W x H x D):  430 x 87 x 243 mm (16-7/8" x 3-7/16" x 9-5/8")

Weight:  5 kg (11 lbs)