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





Onkyo DX-700


Specifications
Signal Readout System:  Optical non-contact
Reading Rotation: About 500 - 200 rpm (constant kinear velocity)
Linear Velocity:  1,2 - 1,4 m/s
Error Correction System:  cross interleave readsolomon code
Decoded Bits:  1 BIT PWM  Accu Pulse Quartz System
Sampling Frequency:  352,8 kHz (8 times oversampling)
Number of Channels:  2 stereo
Frequency response:  5 Hz - 20 kHz
Total Harmonic Distortion:  0,004% (at 1 kHz)
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  100 dB
Channel Separation:  90 dB (at 1 kHz)
Wow and Flutter:  below threshold of measurability
Output level:  2 V rms
Power Consumption:  12 watts
Dimensions (W x H x D):  455 x 110 x 305 mm (18' x 4-3/8" x 12")
Weight:  4,9 kg (10,8 lbs)

I like

Denon DCD-3300


The DCD-3300 compact laser disc player utilizes a unique Denon Super Linear Converter which prevents deterioration of soun quality in the PCM playback system, assuring accurate reproduction of sound record on compact laser disc, in the studio or in live sound production areas. the parts for this high performance disc player have been selected with careful discrimination, to produce high quality, realistic playback of the full musical production.

Features:
Double Super Linear Converter
This unique, Denon converter system prevents the zero-cross distortion that causes deterioration in PCM reproduction quality. The result is perfect reproduction of concert hall quality.
Optical Isolator
Used for transmitting digital signals, this isolator converts digital signals into optical ones, thereby eliminating undesirable noise interference between tha digital servo and audio circuits.

Wireless Remote Control
An accessory remote control unit has a veriety of general functions such as Play, Stop and Pause and a ten-key key-pad controlling direct music selection, direct programming and time search functions. this  remote control capability gives the DCD-3300 yet greater versatility.
High-performance Digital Filters
The DCD-3300 uses an independent D/A converter for L and R channels, with four, super sampling, high-precision digotal filters. A Denon-original lattice-type linear phase "C.A.L.P." (Computer Analyzed Linear Phase) filter also provides flat frequency characteristics. This analog filter is ideal for ensuring excellent starting characteristics and clear sound reproduction.
Specially-Designed Audio Power Transformer
Two independent power transformers are used for the digital servo and audio circuits. Combined with the large capacity power condeser, they stabilize the audio circuitry.

Sound System Provided with Balance Output
The balance output (load 600 ohm) is operated with a canon connector. Offering three types of output: Fixed, Variable (Imbalance) and Variable (Balance), this sound system can meet professional requirements.
Quick Search Function
A starting point for play canbe designated in seconds, providing easier operation for both reference and professional purposes.
Original Denon Linear Motor
Designed for quick and smooth running, the linear motor greatly reduces access time and improves tracking resolution, resulting in enhanced high fidelity reproduction.
Optical Output of Digital Information
Musical information on a compact disc can be digitally output for reproduction by an external digital processor or D/A unit. An optical output is added to two coaxial outputs, eliminating noise interference and improving sound quality.

Specifications:
Audio
No. of Channels:  two channels
Frequency Response:  2 - 20,000 Hz ±0,2 dB
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  100 dB
Total Harmonic Distortion:  0,0025% (1 kHz)
Separation:   100 dB (1 kHz)
Wow and Flutter:  less than the measuring limit (±0,001% W, peak)
Output Voltage:
Fixed:  2,0 V
Variable :  6,9 V with maximum Line-out volume
Balance Type:  19 dBm/600 Ω load with maximum line-out  volume (Variable output voltage is shown without  600 Ω load on balance type output)
Disc:  Compact disc are used
Playing Time:  60 min/single side
Diameter:  120 mm
Signal Format:
Sampling Frequency:  44,1 kHz
Quantization:  16 bit linear/chnnel
Transmission Bit Rate:  4,3218 Mbits/sec
Digital Output Signal Format
Format :  Digital Audio Interface
Coaxial Output Voltage :  0,5 Vp-p 75 Ω
Optical Power:  -12 dB
Optical Waveform :  650 nm
Pickup
System :  Objective lens drive system, laser pickup
Lens Drive System :  Two-dimensional parallel drive
Ligh Source :  Semiconductor laser
Wavelength :  780 nm
General
Power Supply:  110, 120, 220, 240 V, 50/60 Hz Voltage
Power Consumption:  25 W
Dimensions (W x H x D):  434 x 105 x 360 mm (17,1 x 4,1 x 14,2 inch)
Weight:  14 kg

Function:  Direct selection, automatic search, programmed selection, repeat playback, manual search, index search, time search
Display :  Track number, index number, time, and program
Remote Control Unit :  RC-3300 Infrared pulse system


Luxman D-404


Luxman D-404
Specifications
TYpe:  Compact disc player with optical pickup
Quantization:  16 bit linear
Channels:  2 - stereo
Frequency Response:  5 Hz - 20 kHz  +1,0 dB  -1,5 dB 
Dynamic Range:  80 dB
Total Harmonic Distortion :  0,01% (1 kHz)
Channel Separation:  80 dB
Wow and Flutter:  unmeasurable
Output:  2,0  Volts ±0,5
Pickup:  Semiconductor laser type
Track Location:  by track
Power Supply:  AC 100 V, 120 V, 220 V, 50/60 Hz
Power Consumption:  13 Watts (100V)
Dimensions (W x H x D):  453 x 75 x 300 mm
Weight:  5,1 kg



Philips CD-720


Philips CD-720
Specifications
Frequency Ranger:  2 Hz - 20 kHz
Amplitude Linearity:  0,3 dB (20 Hz - 20 kHz)
Phase Linearity:  4° (20 Hz - 20 kHz
Dynamic Range:  90 db (1 kHz)
Signal-to-Noise Ratio:  90 dB (1 kHz)
Channel Separation:  90 dB (1 kHz)
Total Harmonic Distortion:  0,003% (1 kHz)
Audio Output Level:  2 Vrms
Phono Impedance Socket:  30 - 600 Ω
Power Supply:  110-120, 220-240V, 50/60 Hz
Power Consumption:  less than 100 W approx
Safetey Requirements:  IEC 65
dimensions (W x H x D):  435 x 90 x 300 mm
Weight:  4 kg
Cabinet:  Metal and Polystyrene finish



I like

Arcam Delta 60 amplifier


The Arcam Delta 60 is a powerful, versatile and thoroughly modern hi-fi amplifier.
The Delta 60 is a worthy successor to the famous A&R A60. England's "classic" integrated  amplifier of the late seventies and early eighties. Famed for its reliability and long life, as well as its fine sound quality, over 30 000 A60s are in everyday use worldwide. By making use of the advances in technology that were not available when the A60 was designed, the Delta 60 retains all that was best in that amplifier, whilst improving on it in terms of sound quality, aesthetics and ease of use.
The Delta 60's clean design makes it a perfect match for the Arcam Delta series of hi-fi components. These include the Delta 70 compact disc player (with its optional Delta Black Box outboard D/A cenverter) and the Delta 80 FM/AM Tuner. the Delta 60 is also ideally suited to driving Arcam's range of loudspeakers.

Versatility
The Delta 60 can accept inputs from up to 5 different sources. These include 4 line inputs, normally compact disc, tuner and two tape recorders (one of which can be a VCR). A full tape monitor facility for one of the tape recorders is provided, allowing offtape monitoring of the recorder signal when a three head tape recorder is used. Two tape outputs are available.
the disc input caters for all Types of pickup cartridge. As well as normall MM cartridges, even the highest quality low output moving coil types can be accommodated via the Delta 60's built in low noise MC preamplifier stage. this is switchable from the rear of the amplifier. In addition, the user's chosen cartridge may be optimally matched to the disc pre-amplifier by thw addition of our optional switched loading modules. Versions are available to suit both MC and MM cartridges.
All inputs to the Delta 60 are made via good quality phono sockets. All the line level inputs are fed directly to the volume control, enabling any source to be accepted without distortion, as the overload margin is virtually infinite. The volume control itself is a high quality, friction locked "dual" type. This removes the need for a separate balance control (with a consequent improvement in sound qualit). A mono switch is provided; this is operative on all inputs and can yield significant improvements in noise performance when playing old records or receiving weak FM broadcasts.
Ingenious loudspeaker switching is an Arcam speciality. Two pairs of loudspeakers may be used with the Delta 60 - these are connected via heavy duty, silver plated 4 mm sockekets. The main speaker sockets are hard wired directly to the amplifier's outputs to obtain the best possible sound quality. Headphones can be used in parallel with these. A second set of switched loudspeaker sockets is also available; these can be muted via a front panel switch when not required. This is particularly useful for someone who wants to listen to headphones without disturbing the neighbours.

Quality and Reliability
Great care has been taken with every aspect of the Delta 60's design to ensure first class sound quality and reliability. All components are operated well within their ratings and are laid out on a single large fibreglass p.c.b. (printed circuit board). This virtually eliminates internal wiring and connectors, both potential sources of inconsistency and long term unreliability. Most components are soldered using Arcam's military standard flow soldering and p.c.b. washing equipment. This is followed by a rigorous visual inspection procedure. 100% testing of all major parameters is carried out on every amplifier using advanced computer controlled automatic testing equipment both before and after a gruelling 24 hour burn in procedure. After this every amplifier is given a functional listening test by our final inspection department before packing and despatch.
As with all Arcam electronics, the Delta 60 is warranted for 2 years from date of purchase against failure in normal use.
Styling
The Arcam Delta 60 looks as good as it sounds. This is no accident, because great care was taken from the outset with all aspects of both the mechanical and electronic design.
The elegant, slimline cabinet is construced entirely from aluminium alloy with extensive and imaginative use being made of custom extrusions. Aluminium was chosen because of its excellent thermal characteristics (for cooler running) and nonmagnetic properties (for better ssound quality), in addition to its ease and consistency of fabrication. The cabinet is finished in attractive and durable black epoxy paint.

Power
The Arcam Delta 60 is an extremely well behaved amplifier which has a sufficiently high peak current capability to drive all practical loudspeaker loads down to 4 ohms nominal impedance. Electronic protection in the power stages safeguards against  any incorrect loads or short circuits. This short term protection is backed up by easily replaceable output fuses should a fault persist.
The Delta 60 amplifier is guaranteed to deliver its continuous rated output power of 50 watts per channel into an 8 ohm load at any frequency from 20 Hz to 20 kHz. In practice, under normal music conditions, considerably more power is available. Given loudspeakers of at least moderate efficiency, surprisingly high volume levels are attainable without audible distress.

Electronic Design
The Delta 60's electronics incorporate high gain, high current power amplifiers whose inputs are fed directly from the amplifiers's volume control. By eliminating all line amplifier and tone control stages from the circuitry Arcam have ensured that all the Delta 60's line inputs are always routed straight through to the power amplifiers, eliminating the need for such marketing handles as "CD direct" switches and the like. Due to the amplifier's straightwire input the number of series coupling capacitors has been dramatically reduces with consequent improvements in dynamics and clarity.
The power supply meets Arcam's usual high standards with substantial twin 10,000 uF reservoir capacitors fed from a generously sized 200 VA Holden and Fisher toroidal mains transformer. This has excellent regulation and a very low radiated magnetic field for optimum sonic performance.
The phono pre-amplifier stages of the Delta 60 are of a high standard for an integrated amplifier. They feature fully regulated power supplies and a passive equalisation section between the two main stages which are themselves D.C. coupled to each other. This system provides audibly better resolution and imagery. The input buffer amplifiers use precision Op27 amplifiers for improved noise performance and liberal use is made of 1% metal film resistors and high grade polystyrene and polypropylene film capacitors. In addition the Delta 60 incorporates a high quality switchable MC cartridge pre-amplifier stage fed from its own totally separate regulated supply. Provision is made for customised cartridge loading on both MC and MM inputs via Arcam's unique user adjustable universal cartridge loading modules.

Specifications
Output Power
Both Channels :  50 W at 8 Ω  (20 Hz to 20 kHz , 0,5%)
Single Channel :  60 W at 8 Ω , 95 W at 4 Ω
Peak Current Delivery:  ±10A
Harmonic Distortion:  0,02% (50 W, 8 Ω , at 1 kHz)
Frequency Response:
Disc :  better than 40 Hz - 35 kHz  +0,3 -0,5 dB
Typ. -3 dB  at 20 Hz
Line :  30 Hz  to 35 kHz  ±0,5 dB
Typ. -3 dB  at 10 Hz , 80 kHz
Inputs
Disc (Moving Magnet)
Sensitivity :  1,8 mV
Noise (CCIR) :  -75 dB
Overload Margin at 1 kHz  :  35 dB
Input Impedance :  47 k Ω /100 pF
Switchable Loading Module (type ULM/M) available to provide the following additional loads; 30 k Ω , 8 k Ω , 200 pF, 320 pF, 420 pF and user programmable option
Disc (Moving Coil)
Sensitivity :  160 µV
Noise (CCIR) :  -67 dB
Overload Margin at 1 kHz  :  35 dB
Input Impedance :  220 Ω /4,7 nF
Switchable Loading Module (type ULM/M) available to provide the following additional loads; 100 Ω, 30 Ω, 10 Ω, 100 nF and user programmable option
Tuner, Tape 1, 2
Sensitivity: 160 mV
Noise (CCIR) ref. 1 W output -95 dB
Input Impedance: 10 k Ω
Overload Margin at 1 kHz :  50 dB
CD
Sensitivity :  260 mV
Input Impedance :  6 k Ω
Outputs
Tape 1, 2
Nominal  Output :  160 mV
Input IMpedance :  2 k Ω
Crosstalk (all Inputs):  -70 dB at 1 kHz
Power Consumption:  250 VA maximum
Dimensions (W x H x D):  430 x 64 x 295 mm
Weight:  5 kg Net (6 kg Packed)



Rotel RA-610
The  RA-610 is equipped with every conceivable control and feature any demanding audiophile ever hopes of having on his unit. The RA-610 was designed for both the versatility and ease of operation. It will add professional studio flexibility to your present music center.
The performance of RA-610 is exceptional it will allow you to experience true high fidelity as never before. its full and natural stereo phonic reproduction offers you musical entertainment  rivaling that of live performances.

Special Features:
Direct Coupling Output Circuit eliminates the need for an output capacitor, thereby, permitting better frequency response at lower IM distortion.
Differential  Amplifier provides higher stability and lover distortion
Split Power Supplies for left and right channels decrease frequency damping factor and overall distortion.
Tone Defeat switch offers absolute flat response
-20 dB Muting switch provides instataneous quietness
Tape Monitor switch for tape playback and recording
Dual slide tone controls for Bass and Treble offer easy and accurate tone adjustment.
High and Low Filter switches, -9 dB cutoff, for eliminating rumble and scratch noises.
Loudness switch for boosting extreme low frequencies during low volume operation
Two pairs ofm agnetic input jacks for two sets of record players with different input impedances.
Pre-amplifier Outputs for use with separate power amplifier or multi-channel system
Main-amplifier Inputs for use with separate control amplifier or tape recorder.
Front Panel Stereo headphone Jack for easy use
Two speaker Selector switches for individual or simultaneous operation of two speaker systems
Handsame Wood Cabinet.

specifications
Power Output:
Total Music Power (IHF):  120 watts at 4 ohms;  90 watts at 8 ohms
Continuous Power (RMS):  32 watts/channel, 8 ohms at each channel driven
Distortion :
Harmonic :  less than 0,1% at rated output
Intermodulation :  less than 0,1% at rated output  (70 Hz : 7,000 Hz = 4 : 1)
Frequency Response:
Main Amp. ONly :  3 Hz to 1000,000 Hz +0 db to -3 dB
Auxiliary Inputs :  5 Hz to 90,000 Hz +0 dB to -3 dB
Power Bandwidth (IHF):  3 Hz to 55,000 Hz
Input Sensitivity (at rated output)/ Impedamce:
Phono 1 :  2,5 mV/50 k Ω
Phono 2 :  2,5 mV/100 k Ω
Tuner :  120 mV/25 k Ω
AUX 1, 2 :  120 mV/25 k Ω
Tape In :  120 mV/25 k Ω
Main Amp. Input :  650 mV/35 k Ω
Signal-to-Noise Ratio :
Phono 1 :  65 dB
Phono 2 :  65 dB
Tuner:  80 dB
Aux 1 , 2, Tape In :  80 dB 
Residual :  1 mV
Square Wave Rise Time:  2,2 microseconds
Damping Factor:  35 at 8 ohm;  70 at 16 ohm
Output Impedance:
Speaker terminals :  4, 8, 16 ohms at full rating
Pre-amp Output :  50 ohms
Loudness Switch :  +10 dB at 50 Hz
High Filter : -96 dB at 10 kHz
Low Filter :  -9 dB at 50 Hz
Muting:  -20 dB at 1 kHz
Bass Control:  +15 dB to -13 dB at 50 Hz
Treble Control:  +14 dB to -16 dB at 10,000 Hz
Phono Overload:  over 100 mV
Phono Equalizer:  +17 dB at 50 Hz
Cross-Talk:  60 dB at 1 kHz
Dimensions (W x H x D):  16-1/4 x 8-3/4 x 4-7/8 inch
Weight:  13,2 lbs


I like

Tannoy SRM 12X - monitor


One of the Super Red Monitor from Tannoy, the real Thing,, SRM 12X
The SRM 12X Monitor from Tannoy is definitely no impostor, but a fully fledged Studio Monitor whose size makes it equally suitable for domestic use. The Tannoy Dual Concentric  "2 Speaker in One" integrated drive system - similar to our formidable Super Red Monitor - handles 100W of continuous power, and will take peaks of 300W.
The legendary Tannoy efficiency means that power is used to fill your room with more music than conventional speakers, and all at a price that won't bankrupt you.
The SRM 12X, and any other model in the new Tannoy SRM Series of Monitors, will transform your listening pleasure. Why settle for inferior speakers, when the advantage of the World's Finest Monitoring Systems is now available to you at home.

Some speakers carry the title of "Monitor" without actually posessing the professional standards of performance implied by the term. At Tannoy we know a thing or two about monitoring - we/ve supplied Monitor Loudspeakers to the World's leading recording and broadcast studios for 30 years. In the tough profrssional sound world you only last that long if your product is the best, so you canbe sure that any Tannoy Monitor is certainly the Real Thing

Specifications
Rec. Amp. Power:  10 -200 W
Peak Power Handling:  350 W
Max SPL (in room conditions  equidistant from each speaker):  120 dB (126 dB/pair)
Sensitivity (1 W at 1 m anechoic):  92 dB
Drive Units :  305 mm (12") Dual Concentric
Dimensions (H x W x D):  846 x 446 x 272 mm (33: x 17,5 " x 11")
Weight:  30 kg (66 lbs)


Hitachi FT-440 tuner

 Hitachi model FT-440 AM/FM Stereo Tuner
Specifications:
Circuitry:  AM/FM 2-band stereo tuner
Semiconductors:  12 Transisors; 1 FED; 2 ICs; 23 Diodes; 2 LED
FM Section
Frequency Range:  88 - 108 MHz
Usable Sensitivity:  1,7 µV (IHF)
Image Rejection:  75 dB
IF Rejection:  100 dB
Distortion:
Monaural :  0,1% (400 Hz)
Stereo :  0,25% (400 Hz)
Signal-to-Noise ratio:  76 dB
Selectivity:  80 dB (±400 Hz)
Stereo Separation:  50 dB (1 kHz)
Capture Ratio:  1,0 dB
Antenna Input Impedance:  300 Ω balanced type; 75 Ω unbalanced type
AM Section
Frequency Range:  530 - 1,605 kHz
Usable Sensitivity:  12 µV (IHF), 250 µV/m (bar antenne)
Image Rejection:  45 dB (1000 kHz)
IF Rejection:  388 dB
Selectivity:  34 dB (±10 kHz)
Signal-to-Noise Ratio:  45 dB
Output Voltage:
AM :  0 -165 mV (variable) [400 Hz, 30% modulation]
FM :  0 - 550 mV (variable [400 Hz, 100% modulation]
Power Requirements:  AC 120 V 60 Hz or 110 V, 120 V, 220 V, 240 V 50/60 Hz
Power Consumption:  12 W
Dimensions (W x H x D):  435 x 166 x 377 mm
Weight:  7 kg (15,4 lbs)


Sanyo FMT-611K tuner

 Sanyo Stereo Tuner FM/AM Band, model FMT-611K
Specifications:
Usable Sensitivity:
Mono :  1,9 µV/10,77 dBf
Stereo :  4,8 µV/18,82 dBf
50 dB Quieting Sensitivity
Mono :  2,8 µV/14,14 dBf
Stereo :  38 µF/36,79 dBf
Signal-to-Noise Ratio at 1 mV
Mono :  70 dB
Stereo :  66 dB
Capture Ratio:  1,2 dB
Alternate Channel Selectivity :  65 dB (±400 kHz)
Image Response Ratio:  58 dB
Spurious Response Ratio:  85 dB
IF Response Ratio:  75 dB
AM Suppression Ratio:  60 dB
Total Harmonic Distortion:
Mono :  0,15%
Stereo :  0,2%
Stereo Separation (100 Hz/ 1 kHz/ 10 kHz):  35 dB/ 40 dB/ 35 dB
Sub-Carrier Product Rejection (19 kHz/38 kHz):  70 dB/ 70 dB
Audio Frequency Response:  20 Hz -15 kHz ±2 dB
AM Section
Usable Sensitivity:  300 µV/m
Sellectivity at ±10 kHz:  40 dB
Spurious Rejection:  45 dB
Image Response Ratio:  50 dB
IF Response Ratio:  40 dB
Signal-to-Noise at 100mV/Input:  65 dB
Total Harmonic Distortion at 10 mV/m Atenna Input:
30% mod. :  0,3%
80% mod. :  0,9%
General Section
Power Requirements:  120 V AC
Power Consumption:  18 W
Dimensions (W x H x D):  16-1/2 x13-3/4 x 5-7/8 inch
Weight:  14,3 lbs


Sansui AU-20000 amplifier


High-output , low-distortion circuitry
The AU-20000 is the most powerful integrated amplifier in Sansui's distinguished AU Series. Its constant and reliable power output is a continuous 170 watts, min.RMS, per channel, both channels driven into 8 ohms, over a 20 Hz to 20 kHz bandwidth with no more than 0,05% Total Harmonic Distortion.
Powerful Triple Push-Pull output circuit design
No less than six hand-selected power transistors are used in each output channel. The triple push-pull circuitry here is guaranteed to deliver its rated output at the lowest possible distortion power to spare, always.

Dependable power Supply
Particularly close attention is paid to the power supply design to ensure dependability and stability. The circuit is the plus-minus symmetrical voltage type, coupling a low magnetic leakage toroidal transformer with extra large capacitors.
Dual-Amplifier Phono equalizer with low-noise transistors
Dynamic response is improved by the 8-transitor equalizer with differential amplifiers at its initial stages. Distortion is totally minimized, and the dual amplifier design - a CR type for highs and a NF type for lows achieves very accurate RIAA equilization.

Triple Tone Control
The AU-20000  features Sansui's exxlusive Triple Tone Control design, controlled by a CR type circuit. A wide dynamic range and excellent transient response are assured by the use of a plus minus voltage supply
Complete Triple Protection Circuits
Damage and breakdowns are avoided entirely with the use of a temperature sensing circuit, a DC voltage detection circuit and an ASO (Area of Safety Operation) detection circuit. Shorts in speaker terminals or leads, or power temperature emergencies instantly activate these circuits for complete protection.
Selectable phono sensitivity and Impedance
The phono input circuitry in the AU-20000 incorporates two special selectors, each with three positions, to allow the selection of the correct sensitivity and impedance to obtain optimum results with any cartridge in use.

Versatile tape monitor circuit
The AU-20000 accepts up to the stereo tape deck and provides individual monitoring and deck-to-deck dubbing for each. It also permits source monitoring during the dubbing process.
Other user-oriented features
Provided are:  Tone Defeat Switch; 3-Step Audio Muting Switch; 2-Step Low/High Filters; Mode Switch; Meter Sensitivity Switch, and large, Self-Illuminated level Meters.

Specifications
Power Output: 
170 watts per channel into 4 and 8 Ω
85 watts per channel into 16 ohms
Load Impedance:  4, 8 and 16 Ω
Power bandwidth:  20 to 20,000 Hz at or below rated min. RMS power output and Total Harmonic Distortion
Total Harmonic Distortion: :  less than 0,05% at or below rated min.RMS power output and Total Harmonic Distortion
Intermodulation Distortion (70 Hz : 7 kHz = 4 : 1 SMPTE Method):
Overal (from AUX) less than 0,05% at rated RMS power output
RIAA Curve Deviation (Phono):  +0,2 dB, -2 dB (30 to 15,000 Hz)
Channel Separation (at rated output  1,000 Hz):
Phono 1 :  better than 55 dB
Phono 2 :  better than 55 dB
Tuner :  better than 60 dB
Aux :  better than 60 dB
Power Amplifier :  better than 100 dB
Tape Monitor :  better than 60 dB
Hum and Noise (IHF):
Phono 1 :  better than 70 dB
Phono 2 :  better than 70 dB
Tuner :  better than 80 dB
Aux :  better than 80 dB
Power Amplifier :  better than 100 dB
Tape Monitor :  better than 80 dB
Input Sensitivity and Impedance (1 kHz, for rated output):
Phono 1 ;  1,5 mV, 3 mV, 6 mV / 30 k, 50 k, 100 k Ω
Phono 2 :  1,5 mV, 3 mV, 6 mV / 50 k Ω
Max. Input Capability:  more than 350 mV RMS at 0,05% distortion
Tuner :  130 mV / 50 k Ω
Aux :  130 mV/ 50 k Ω
Tape Playback 1 :  130 mV (PIN)
Tape Playback 2 : 130 mV (PIN); 130  mV (DIN)
Tape Playback 3 :  130 mV (PIN)
Recording Output
Tape 1 :  130 mV (PIN)
Tape 2 :  130 mV (PIN), 30 mV (DIN)
Tape 3 :  130 mV (PIN)
Controls:
Bass :  +10 dB  -10 dB at 30 Hz
Midrange :  +5 dB -5 dB at 1,500 Hz
Treble :  +10 dB  -10 dB at 20,000 Hz
Filters:
Low :  -3 dB at 20 Hz (12 dB/oct);  -3 dB at 40 Hz (12 dB/oct)
High :  -3 dB at 7 kHz (6 dB/oct);  -3 at 12 kHz (12 dB/oct)
Muting:  0 dB, -10 dB, -30 dB
Power Requirements:  100, 120, 220, 240 V 50/60 Hz
Dimensions (W x H x D):  460 x 178 x 400 mm (18-1/8" x 7" x 15-3/4")
Weight:  22,6 kg (49,8 lbs) net


Pioneer PL-A25 turntable


A combination of Superb Sound and easy Automatic operation. First,in this finecomponent, you get the best, the steadiest system ever devised to achieve steady turntable platter revolution - the belt drive. Adding to the steadlness is the aluminum alloy die-cast platter with its big 12" diameter. Very important, there is a system of automatic devices for the tonearm - auto lead-in, auto return, cut and repeat, making for very easy operation. The arm also has a lateral balancer for better stereo balance. The IM cartridge provides excellent response, and the entire unit is mounted in an attractive walnut cabinet.

 the finest Drive System
The PL-A25 employs a quality outer rotor hysteresis synchronous motor for constant turntable speed. The 12" aluminum alloy die-cast turntable, with its rock-steady flywheel action, is driven by a precision-made polyurethene belt that is unaffected by temperature, oil or humidity. The result is a high signal to noise ratio; wow and flutter are reduced to inaudible levels, and the overall sound is excellend

The PL-A25 is mounted in an oil-finished walnut cabinet with smoked acryl dust cover, styled to add eleganceto any interior. The cabinet is provided with rubber "feet" to absorb vibrations and shocks, preventing howling or needle skipping.

Improved Tone-arm
The PL-A25 employs a newly developed straight tonearm, designed to be used with light weight stylus  pressure for high compliance by reducing the weight of the tonearm itself and increasing the sensitivity of the pivot. The tonearm is provided with a lateral balancer for balanced stereo reproduction. It preventd drift of the tonesrm toward the outside or inside of the turntable. The tonearm is easily lowered and raised by the oil-damped arm lift to protect the  valuable stylus records.


Specifications
Drive System:  belt-drive system
Drive Motor:  4-pole outer rotor hysteresis synchronous motor
Turntable:  12" alloy die-cast platter
Speed:  33-1/3 and 45 rpm
Tonearm:  static-balanced tubular tonearm
Cartridge:  PC-35 (magnet type)
Stylus:  PN-35 (0,5 mil diamond)
Stylus pressure:  2 - 3 grams
Output Voltage:  3,5 mV (at 1 kHz, 50 mm/sec)
Separation:  better than 20 dB (at 1 kHz)
Frequancy Response:  10 to 25, 000 Hz
Signal-to-Noise ratio:  better than 46 dB
Wow and Flutter:  less than 0,1%
Power Requirement:  110,117, 130, 220 or 240 V AC 50 or 60 Hz
Power Consumption:  14 VA (12 W)
Dimensions (whd):  440 x 170 x 350 mm (17-5/16" x 6-11/16" x 13-3/4")
Weight:  7,5 kg (16 lb 8 oz)


Pioneer PL-41D turntable


A broadcast-quality, belt-drive stereo turntable, with outstanding performance specifications and sensitive pipe tonearm

Pioneer's PL-41D incorporates a host of important features for professional stereo music reproduction and is eminently suitable for the highest quality home music systems. A belt-drive stereo turntable with precisely finished turntable platter and tonearm, the unit has the look of distiction - and the performance to match. Its motor is the  8-pole hysteresis synchronous type, designed for unvarying speed accuracy, regardless of voltage fluctuations, and for extremely low vibration, noise, and wow and flutter. Other key features of the PL-41D include Pioneer's unique suspension assembly, advanced polyurethane belt, polished for unerring accuracy of revolution, a heavy aluminum alloy diecast turntable platter, a lateral balancer and tonearm height adjustment device to assure perfect tracking. Not the least important feature of the PL-41D, in keeping with Pioneer's tradition of offering maximum value for your stereo investment, is a inducted magnet type cartridge with 0,5 mil block diamond stylus, good for more than 2000 hours of fine music playback.

Specifications:
Motor:  8-pole hysteresis synchronous type
Speeds:  3-1/3 and 45 rpm
Platter Diamterer/Weight:  310 mm /  aluminum die-cast
Signal-to-Noise Ratio:  52 dB
Wow and Flutter:  0,07%
Tonerarm:  Static-balanced, S-shaped pipe arm (with plug-in head shell)
Usable Cartridge Weight:  4 to 14 g
Power Requirements:  AC 100 V 50/60 Hz  or 110, 120, 130, 220, 240 V 50/60 Hz
Power Consumption:  13,5 watts
Dimensions (W x H x D):  498 x 201 x 429 mm
Weight:  12,5 kg