JVC KD-21D cassette tape deck

This easy-to-afford KD-21D shares many of the features of other, more expensive JVC decks. Among its noteworthy features are the 5-LED Peak Indicator, Timer Standby Facility, Dual-Ball Cassette Hold System.

Every circuit and every control is designed for the cleanest, most musical recording and playback.

The KD-21D thus offers high-quality specifications such as 56 dB Signal-to-Noise Ratio to guarantee long years of musical enjoyment. Add this high-performance deck to your present audio system to make it complete.

 

Dolby Noise Reduction

If you're familiar with tape recording, so must you be with this useful feature. With it switched in, you hardly notice hiss - the objectionable intruder inherent to tape recording. Unless effectively reduced, tape hiss is particularly more annoying during soft musical passages. And it's a problem no matter what type of tape you use. With the Dolby in the KD-21D, hiss noise is reduced by as much as 5 dB at 1 kHz and 10 dB above 5 kHz. Pulsive peaks are tamed to render high-frequency signals sound free from distortion and all forms of high-frequency noise.

JVC use the Dolby in a compact IC with components inside directly coupled. Its improved transient response means crisp reproduction, while dependability and stability are impeccable.

 

Considerations for Wider Dynamic Range

If a signal is clipped and distorted anywhere along the way from a deck's input to output, there's no way to restore it entirely to its original quality. Therefore, JVC have taken every consideration in the KD-21D to widen dynamic range and prevent distortion and clipping. There are, for example, a separate low-distortion amp for mics in an advanced 2-stage, direct-coupled NPN transistor ; a Mic/Line input selector that permits line inputs to go straight to the recording amp without adding distortion of its own; two 2-position Bias and Equalizer switches to make most of every tape on the market; and more.

 

Useful Recording Aids

These large VU meters enhance visibility to  help you make correct level adjustments. Together with the JVC's 5-LED Peak Indicator, they help you make clean tape recordings every time. As on the more expensive JVC models, our KD-21D is equipped with the Full Automatic Stop Mechanism to eliminate worry about stretched tapes or an overheated motor. A light in the tape well permits you to keep a close watch on the cassette at all times.

 

Specifications

Type:  stereo cassette deck

Track System:  4-track, 2-channel

Motors:  Electronic Governor DC motor

Tape Speed:  4,8 cm/sec

Fast Forward/Rewind Time:  100 sec with C-60 cassette

Heads: 

Recording/Playback :  Cronios head

Eraser: 2-gap , Ferrite head

Bias:  AC bias (95 kHz)

Erasure:  AC erasure (95 kHz)

Frequency Response: 

CrO₂ :  30 - 15,000 Hz (Typical)

Norm :  30 - 14,000 Hz (Typical)

Signal-to-Noise Ratio :  56 dB from peak level, weighted

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with Dolby NR on.

Wow and Flutter:  0,10% (WRMS) 2,20 % (DIN 45 511)

Crosstalk:  65 dB at 1 kHz

Total Harmonic Distortion :  1,3% ( 1khz, 0 VU, Normal tape)

Input Sensitivity/Impedance:

MIC :  0,2 mV/600 Ω  - 10 k Ω

Line :  80 mV/100 k Ω

DIN :  0,07 mV/ k Ω 

Output Level/Impedance

Line :  420 mV/3,5 k Ω

DIN :  420 mV/3,5 k Ω 

Headphone :  0,3 mW/8  Ω  - 1 k Ω

Power Requirements: AC 120 V, 60 Hz (KD-10 C/J); AC 240/220/120 V 50/60 Hz (KD-10 A/B/E)

Power Consumption:  15 W

Dimensions (W x H x D):  390 x 157 x 259 mm (15-3/8" x 6-1/4" x 10-1/4")

Weight:  4,5 kg (9,9 lbs)

 

JVC KD-10 cassette deck

The KD-10 is priced even lower than other JVC decks, but still includes the following features; 5-LED Peak Indicator, a Timer Standby Facility, Automatic Input Selector, JVC's electronic governor motor and more. In line with other, more expensive decks, performance parameters - such as a high Signal-to-Noise Ratio (56 dB from peak level, weighted) - guarantee long years of musical enjoyment. The KD-10 is a high value, high performance deck at a budget cost.

 

New Circuity

JVC's KD-10 includes an IC sized Dolby circuit to reduce annoying tape hiss. This IC form circuit is direct coupled, a highly precise configuration which makes for excellent transient characteristics. Likewise, the KD-10's microphone amp is of an advanced 2-stage direct-coupled design in low-noise IC form.  And to improve its Signal-to-Noise Ratio and dynamic range, the amp is separate from the line input. The result; high record amp linearity and only negligible distortion of even high-frequency signals.

 

Designed for Wide Dynamic Range Recording

Similar to more expensive JVC decks, the KD-10 has an Automatic Mic/Line Input to help lessen distortion and to expand dynamic range. Three-positioned Bias and Equalization switches allow the KD-10 to accept any type of tape on the market. And with the added assistance of JVC's 5-LED Peak Indicator and new and large VU meters (which even compensate for temperature changes) you can create true-to-life recording with a wide dynamic range

 

Convenience Features

A reed-type fully-automatic stop mechanism protects tapes and pinch roller from disfiguration. It also prevents the deterioration of wow and flutter with the passage of time. And speaking of time, the KD-10 includes a Timer Standby mechanism which lets you record unattended or awake to music. You can also make direct mode changes without going through Stop. The JVC Gear Oil-Damped Cassette Lid and more

 

Accurate Tape Transport

Tapes are unspooted by a precision-finished capstan (ground to a roundness of 01 µ), which is coupled to a large, dynamically balanced, 80 mm flywheel, driven by a precision ground belt. It contributes to the low wow/flutter.

 

Specifications

Type:  stereo cassette deck

Track System:  4-track, 2-channel

Motors:  Electronic DC motor x 1

Tape Speed:  4,8 cm/sec

Recording Time:  2x30 minutes with C-60 cassette

Fast Forward/Rewind Time:  85 sec with C-60 cassette

Heads: 

Recording/Playback :  Cronios head

Eraser: 2-gap , Ferrite head

Bias:  AC bias (95 kHz)

Erasure:  AC erasure (95 kHz)

Frequency Response: 

SA/CrO₂ :  30 - 16,000 Hz (Nominal); 40 - 15,000 Hz (Typical)

SF/Norm :  30 - 15,000 Hz (Nominal); 40 - 14,000 Hz (Typical)

Signal-to-Noise Ratio

56 dB from peak level, weighted

60 dB with Dolby NR (DIN 45 500 weighted)

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with Dolby NR on.

Wow and Flutter:  0,06% (WRMS) ±0,2 % (DIN 45 500)

Crosstalk:  65 dB

Total Harmonic Distortion :  1,3% ( 1khz, 0 VU, Normal tape)

Input Senseitivity/Impedance:

MIC :  0,2 mV/600 Ω  - 10 k Ω

Line :  80 mV/100 k Ω

Output Level/Impedance

Line :  410 mV/3 k Ω

Matching Impedance :  50 k Ω  or more

Headphone :  0,3 mW/8  Ω  - 1 k Ω

DIN Socket

Min. Input Level :  0,1 mV./k Ω

Input Impedance :  10 k Ω

Output Impedance :  3 k Ω

Semiconductors:  6 ICs; 1 SCR; 12 Transistors , 31 Diodes

Power Requirements: AC 120 V, 60 Hz (KD-10 C/J); AC 240/220/120 V 50/60 Hz (KD-10 A/B/E)

Power Consumption:  11 W

Dimensions (W x H x D):  420 x 149 x 264 mm (16-9/16" x 5-7/8" x 10-7/16")

Weight:  5,3 kg (11,7 lbs)

 

Sanyo RD-5372 cassette deck

Sanyo's new top-of-the-line cassette deck featuring microprocessor control and 3-head design.

Two motors, a servo-controlled DC motor to drive the capstan, and a second DC governor motor for the reel drive, provide high torque with extremely low wow and flutter. The integrated Sendust Alloy record and playback heads with metal tape compatibility deliver exceptional frequency response and Signal-to-Noise Ratio specifications. Outstanding electrical and mechanical performance in addition to a host of user-oriented features make the RD5372 one of the most sophisticated pieces of cassette recording equipment available

Sendust alloy Record and Playback Heads

Surpassing the capabilities of other head materials, Sendust Alloy record and playback heads are responsible for much of the exceptional performance of the RD5372 and RD5370. the single unit housing both heads provides instantaneous monitoring plus permanent alignment of record and playback heads.

MPX Filter Defeat

This defeat switch permits disengaging the 19 kHz multiplex filter for extended high frequency response when recording live or from a disc.

4-Position Tape Select

Provides optimum bias and EQ for all tape formulations: metal, CrO₂, FeCr and Normal

Integrated Record and Playback Head

Sanyo engineers had to overcome two problems to permit cassette tape monitoring: fitting three heads into the standard cassette format designed to accept only two, and maintaining exact alignment of the record and playback head gaps without the constant adjustment required of some 3-head cassette decks. Sanyo engineers met this challenge with an integrated head design incorporating separate record and playback heads into a single housing. Since both heads are permanently mounted in the same shell, they can never become misaligned, assuring the best possible high frequency performance.

Dual process Dolby Noise reduction

The Dolby noise reduction process has become accepted as the standard for reducing tape his inherent in the recording process. Two-head cassette decks utilize a single Dolby encode/decode circuit for the both record and playback. The RD5372 (and RD5370) 3-head decks contain dual Dolby circuits to encode the recording and simultaneously decode the monitor playback

Microprocessor Logic Control

The Sanyo microprocessor is a tiny digital computer, etched onto a single silicon chip. It executes programmed instructions, sensing the status of switches, controlling solenoids, and monitoring tape motion. This tiny electronic "brain" provides the logic to prevent tape damage, and controls other automatic functions in the RD 5372 (and RD5370)

Specifications

Type:  single compact cassette deck, 3-head design

System: 4-track, 2-channel stereo

Tape Speed: 4,8 cm/s

Heads: One Sendust Alloy Record and Playback Heads, 1 x erase

Motor: PLL DC motor one for x reel, and  capstan

Tape Type: Normal, FeCr, CrO2, Metal

Noise Reduction: Dolby NR

Frequency Response(±3 dB):   (CrO2 tape): 30 Hz to 18,000 Hz  (Metal tape): 30 Hz to 19,000 Hz

Signal to Noise Ratio: 64 dB 

Wow and Flutter: 0.04% WRMS

Total Harmonic Distortion: 1.5%

Inputs:

Line :   100 mV

Mic :  0.26 mV

Output Line : 1 V

 

 

Toshiba SA-850 receiver

Digital Synthesizer Stereo Receiver

Absolutely Precise Digital Synthesizer Tuning with 12 memory Positions, 4 Instant Selection of 6 FM and 6 AM Stations.

Beautifully styled with walnut side panels and brushed aluminum front panels. Lower half of front panel disappears into the unit to expose less often used controls. Double-pair speaker selection, tone control defeat (flat) switch, subsonic filter, loudness switch, stereo/mono mode selection, push-button source selection with full tape monitoring/duplicating facilities including a source-on/recording-off position.

Green LED tuner frequency, signal-strength, stereo and band displays. All push-button tuning system using quartz crystal digital synthesizer system providing manual and automatic tuning with six each preset memory stations for FM and AM.

A professional 41-position click-stop volume control is conveniently located at the upper right. Superb craftsmanship coupled with advanced technology -  the essence of Toshiba's attitude toward high fidelity component design.

 

Quartz Reference Frequency Synthesizer Tuner

Both the FM and AM tuner sections make use of quartz crystal reference frequency and digital frequency synthesizer circuits with PLL system to insure essentially perfect station tuning each and every time. What's more, the ultra-stable control voltage of the PLL is used to tune the 3-gang variable capacitance diodes of the front-end for excellent sensitivity and adjacent channel rejection. This means more received signal power for higher Signal-to-Noise Ratio and less phase distortion than from conventional tuners.

 

Manual and Automatic Tuning

You get your choice of tuning either manually or automatically with push-button selection. In the manual mode, you can tune up or down the FM band in 0,1 MHz increments while for AM, the increments are 1 kHz. In the automatic mode (FM :  Auto Tuning, AM : 10 kHz step tuning), you have a choice of any of six present stations and this holds true for either AM or FM giving you twelve preset stations in all. And more, presenting the station frequency is just as simple by manually tuning to the desired station and pressing two buttons (memory and channel). Channel frequencies are retained with power off and even for a good time with the power cord removed from the outlet.

 

Clean Stereo Amplification for Low Noise at High Power Levels

Full-complementary direct-coupled power amplifiers provide 50 Watts rms power per channel into 8 Ω  and are driven by low distortion differential amplifiers and powerful Darlington drivers with plenty of feedback for inaudible distortion. Clean power supply designs using an extra-large triple-secondary power transformer and twin 10,000 µFd filter capacitors keep power line noise and hum out of the outputs and prevent back-coupling to the low level preamp and tuner stages.

 

Full Tape Monitoring/Duplicating

You get provisions for attaching two three-head (or other) tape decks to the SA-850 with full monitoring provisions plus duplicating switching between the decks either way, 1 to 2 or 2 to 1. and, to isolate the input amplifiers of the decks when their power is off, a special intermediate source monitoring switch position (REC OFF) has been added which eliminates the record output signals to the decks.

 

Wide Range Sound Quality Controls

A large 41-position click-stop volume control is conveniently located at the top, right of the SA-850 to give you level control capability. Twin-pair speaker selection switching lets you fully utilize speakers in remote locations and provides silent operation for use with headphones. Bass/treble controls can be defeated by just loudness control. A subsonic filter eliminates rumble and other low frequency player/disc problems which occur occasionally and a mode switch permits monaural deck playback through both speakers.

 

Specifications

Main Amplifier Section

Power Output (Both Channels Driven):  continuous power output of 50 Watts per channel , minimum rms int 8 Ω  from 20 to 20,000 Hz and with no more than 0,03% T.H.D.

55 watts into 8 Ω  at 1t 1,000 Hz

Total Harmonic Distortion( (20 to 20,000 Hz, 8 Ω )

0,03% or less at 50 Watts per channel

0,02% or less at 25 Watts per channel

0,02% or less at 1 Watt per channel

Intermodulation Distortion (50 Hz : 7000 Hz signals mixed at 4 : 1 , at 8 Ω )

0,03% or less at 50 Watts per channel

0,02% or less at 25 Watts per channel

0,02% or less at 1 Watt per channel

Power Bandwidth:  10 to 35,000 Hz

Residual Noise:  0,5 mV rms into 8 Ω

Damping Factor:  50

Preamplifier Section

Frequency Response

Aux :  10 to 40,000 Hz +0,5, -1,0 dB

Phoo :  20 to 20,000 Hz ±0,3 dB

T.H.D:  0,025 % or less

Subsonic Filter:  16 Hz , 6 dB/oct

Signal-to-Noise Ratio

Phono :  78 dB (2,5 mV), 90 dB (10 mV)

Tape/AUX :  95 dB

Phono Overload Level:  200 mV rms 1,000 Hz

Input Sensitivity/Impedance

Phono :  2,5 mV/47 k Ω

Tuner/AUX :  150 mV/47 k Ω

Tape :  150 mV/47 k Ω

Output Level: 

Tape Rec :  150 mV

Tone Control

Bass :  ±10 dB at 100 Hz

Trebble :  ±10 dB at 10,000 Hz

Loudness Control (-40 dB position)

+8 dB at 100 Hz;  +4 dB at 10,000 Hz

FM Tuner Section

Usable Sensitivity:  10,3 dBf (1,8 µV)

50 dB Quieting Sensitivity:

Stereo :  38,2 dBf (45 µV)

Mono :  15,3 dBf (3,2 µV)

Signal-to-Noise Ratio

Stereo :  68 dB

Mono :  72 dB

Distortion (1,000 Hz )

Stereo :  0,2%

Mono :  0,15%

Frequency Response:  20 to 15,000 Hz +0,5 -1,5 dB

Capture Ratio:  1,0 dB

Selectivity:  80 dB

Spurious Rejection:  75 dB

Image Rejection:  60 dB at 98 MHz

Subcarrier Rejection:  60 dB

IF Rejection:  90 dB

AM Suppression:  50 dB

Muting Threshold:  13,3 dBf (2,5 µV)

Stereo Separation:

45 dB at 1,000 Hz

30 dB from 30 to 15,000 Hz

Antenna

300 Ω  balanced twin-line feeder

75 Ω  unbalanced coaxial cable

AM Tuner Section

Sensitivity:  300 µV/m (IHF, ferrite antenna)

Selectivity:  35 dB

Signal-to-Noise Ratio:  50 dB

Image Rejection:  35 dB

IF Rejection:  30 dB

General

Power Requirements:  AC 120 V, 60 Hz

Power Consumption:  220 W (2,7 A)

Dimensions (W x H x D):  480 x 115 x 390 mm (18,9" x 4,5" x 15,4")

Weight:  12 kg (26,4 lbs)

 

Toshiba SC-410 4-channel

4-channel QM Decoder/Amplifier S.C.-410

Decodes almost any type of encoded matrix 4-channel discs at four modes of 4-channel effect.

Decodes 4-channel programs from ordinary non-encoded discs into quasi-quadraphonic stereo sound

Built-in IC power amplifier for two sets of rear channel speaker systems

Connectable to any type of stereo amplifier furnishing DIN socket and PIN "pre out/in" jack

 

Specifications

Power Output:  30 W rms, 8 Ω , T.H.D. 0,8% (total)

Frequency Response:  20 - 40,000 Hz (exlude QM section)

Power Bandwidth:  20 - 40,000 Hz (exclude QM section)

Semiconductors: 

2 Transistors for AF amplifier

1 Diode for power Supply

2 ICs (TH-9015P's) for power output section

4 FET's and 4 Transistors for QM decoder

Controls:  Main volume, Sub volume, Selector (2-ch/4-ch/tape/aux), Power Off, Speaker A & B, QM effect (concert hall/studio/surround/stage), Hi-cut

Jack and Terminal:  DIN socket, Input/output jack, AC unswitched outlet, speaker terminal

Power Source:  AC 100/120/220/240 V 50/60 Hz

Dimensions (W x H x D):  300 x 115 x 385 mm (11-3/4" x 4-1/2" x 15")

Weight:  6 kg (13-1/4 lbs)

 

Teac 3300 tape deck

The new Semi Pro Tape Deck

The 3300 is available in three basic configurations for maximum versatility

Model 3300-10

Standard 4-track stereo record and playback functions. 3-3/4 and 7-1/2 ips. For maximum tape economy and conventional home use.

Model 3300-11

Half track record and playback with 7-1/2 and 15 ips operation. Ultimate quality fidelity, form master tapes and professional use.

Model 3300-12

Half track record and playback with 3-3/4 and 7-1/2 ips operation. For original recording of master tapes for dubbing.

 

Specifications

Heads:

3300-10 :  three, 4 track 2 channel, stereo or mono erase, record and playback

3300-11 :  three, 2 track 2 channel, stereo or mono erase, record and playback

3300-12 :  three, 2 track 2 channel, stereo or mono erase, record and playback

Reel Size:  10-1/2" and 7"

Tape Speed
3300-10 :  7-1/2 and 3-3/4 ips (±0,5%)

3300-11 :  15 and 7-1/2 ips (±0,5%)

3300-12 :  7-1/2 and 3-3/4 ips (±0,5%)

Motors:

1 dual speed hysteresis synchronous capstan motor

2 eddy current induction reel motors

Wow and Flutter

3300-10 :  0,06% at 7-1/2 ips; 0,09% at 3-3/4 ips

3300-11 :  0,04% at 15 ips; 0,06% at 7-1/2 ips

3300-12 :  0,06% at 7-1/2 ips; 0,09% at 3-3/4 ips

Frequency Response:

3310-10 :  25 - 26,000 Hz (30-22,000 Hz ±3 dB) at 15 ips; 25-24,000 Hz (30-13,000 Hz ±3 dB) at 3-3/4 ips

3310-11 :  25 - 24,000 Hz (30-20,000 Hz ±3 dB) at 7-1/2 ips; 25-16,000 Hz (30-20,000 Hz ±3 dB) at 7-1/2 ips

3310-10 :  25 - 24,000 Hz (30-20,000 Hz ±3 dB) at 7-1/2 ips; 25-16,000 Hz (30-13,000 Hz ±3 dB) at 3-3/4 ips

Signal-to-Noise Ratio

3300-10 :  58 dB

3300-11 :  60 dB

3300-12 :  60 dB

Total Harmonic Distortion :  1% at 1,000 Hz normal operating level

Crosstalk:  60 dB at 1,000 Hz

Stereo Channel Separation:  50 dB at 1,000 Hz

Fast winding Time:  90 sec. For 1,200 feet tape

Inputs

Microphine :  0,25 mV / -72 dB (600 - 10,000 Ω )

Line :  0,1 V, 50,000 ohms or more

Outputs:

Line :  0,3 V for load impedance of 10,000 Ω  or more

Headphones :  8 Ω

Power Requirements:  117 V AC, 60 Hz

Power Consumption:  160 W

Dimensions (H x W x D):  15-3/8" x 15-3/4" x 9-3/4"

Weight:  20 kg ( 44,5 lbs)

Akai 4000D tape deck

Three Head Stereo Tape Deck

A superb stereo tape deck enabling stereo fans to produce the ultimate in high fidelity recordings

High quality three head system embodying the latest techniques, featuring an exclusive one micron gap recording and playback heads plus erase head

All silicon transistorized pre-amplifier reduces hissing noise to a minimum

Strudy mechanism providing excelent durability

Fine oil-finished wooden cabinet matching furniture and / or stereo set

 

Outstanding Features

4-track stereo/monaural recording and playback. For playback, the 4000 D requires an external power amplifier and speakers

2 speeds - 3-3/4 and 7-1/2 ips

3 heads - One micron gap recording and playback heads plus erase head

All silicon trasistorized pre-amplifier

Shield type head for high Signal-to-Noise Ratio

Two lever system ensures dependable and durable sure operation

Track selector for simple selection between stereo and monaural

Sound on sound (by using an optional cord). Sound with sound

Automatic shut off, instant stop control

Tape cleaner

Tape speed equalizer

Tape lifter in fast forward and rewind operation

DIN Jack

Stereo headphone jack

3-digit index counter with reset button, 2 VU meters

Fine oil-finished wooden cabinet

Vertical and horizontal operation

Universal voltage selector (from 100 V to 240 V, 50/60 Hz)

 

Specifications

Recording System:  4 -track stereo- monaural system

Motor:  Induction motor

Semiconductors;  17 silicon transitors, 2 Diodes; 2 rectifiers

At 7-1/2 ips :  Frequency Response:  30 to 22,00 cps ±3 dB

At 3-3/4 ips :  30 to 16,000 cps ±3 dB

Distortion: within 2% 1,000 cps  0VU

Wow and Flutter:

At 7-1/2 ips :  less than 0,15% RMS

At 3-3/4 ips :  less than 0,20% RMS

Signal-to-Noise Ratio: better than 50 dB

Input Level:

Microphone:  better than 0,5 mV

Line :  better than 50 mV

Output Level:  0 VU (1,23 V RMS)

Equalization:  Correct equalization for playback of tapes recorded to the NARTS curve

Recording Level Indicator:  2 VU meters

Fast Forward and Rweind Time:  150 sec. Using 1,200 foot tape at 50 cycles. 120 sec. At 60 cycles

Max Recoding Time:

4 hours monaural recording at 3 -2/4 ips (1,200 foot recording tape)

2 hours stereo recording at 3-3/4 ips

Dimensions (W x H x D):  315 x 405 x 180 mm (12-3/8" x 15-7/8" x 7-1/2")

Weight:  11,5 kg (25,3 lbs)

 

Akai SW-150 speakers

 

Superb Hifi Stereo Sound Effect

Akai 3-way stereo speaker system with high and midrange level controls. SW-150 is design matached to high fidelity Akai stereo tape recorders. Enjoy perfect reproduction of pure sounds from exciting high notes, to mellow, vibrant low tones

 

Specifications

Speakers:

Low Frequency:  12" Woofer

Mid Frequency:  5,25" Midrange

High Frequency:  2" Tweeter (Horn Type)

Impedance:  8 ohms

Max. Power Input:  40 W

Frequency Response:  40 - 20,000 Hz

Dimensions :  25-1/4" x 16" x 11-3/4"

Weight:  35,2 lbs (each)

Philips GA312 turntable

Servo electronic turntable with integrated tone arm

Electronically controlled for smoother reproduction

 

 

Features

A free-floating sub-chassis is suspended independently over the main chassis. The rigid main chassis absorbs any vibration. The floating sub-chassis gives further protection to stylus and record

Electronic stop system eliminates stylus side thrust distortion, temporary cross talk, thumping and groove jumping.

DC motor is combined with a tacho generator. A mini-computer regulates its operation. The computer constantly monitors the running speed. Any deviation - such as changes in cycle current or cleaning brush drag - is instantly corrected.

The driven platter is isolated from motor vibration by a shock-absorbing, precision ground and stabilized polyurethane drive belt. Flutter and rumble are dramatically reduced.

Elastically decoupled counterweight balances the cartridge weight in all planes.

Electronic circuits adjust the speed for 33-⅓ and 45 rpm records. Each speed hasd its own fine adjustment control. All controls have a ligh indicator

Tone-arm cue control lets you raise or lower the arm at any part of the record. Tone arm cueing is feather light, viscous damped and extremely accurate.

Adjustable anti-skating device counteracts the centrifugal force of the spinning record.

 

Specifications

Controls: electronic lighted indicators for 33-⅓ rpm start, 45 rpm start,and stop. Rocker bar for tone arm lift and cue. Two independent potentiometers for speed calibration

Speeds:  3-⅓ and 45 rpm

Speed Calibration Range:  ±3%

Wow and Flutter: 0,1%

Total Audible Rumble:  -62 dB measured according to hearing curve DIN B

Stylus Force Range:  0 to 4 grams

Side Thrust Compensation:  Adjustable for elliptical and spherical styli

Tone Arm:  Integrally coupled with platter on a free-floating sub-chassis for shock isolation

Arm Resonance:  7 kHz

Cartridge Mounting:  Slide-out plate universal, 1/2" mounting centers. Stylus overhang gauge provided.

Platter:  11-1/2" with anti-static rubber mat, 60 Hz stroboscopic ring included

Automatic Stop:  frictionless photocell-electronic system

Motor:  72-pole electronic tacho controlled DC servo motor

System:  belt-drive

Power Supply:  120 Volts AC, 50/60 Hz without modification or convertor UL approved

Power Consumption:  4 watts

Dimensions (W x H x D):  15-1/2" x 6-1/4" x 13-1/4")including dust cover)

Weight:  13,25 lbs (net)

 

Dahlquist M909 loudspeaker

The Dahlquist "M Series" ends the need for compromise. Originally designed for recording and broadcast studios, several models can now be offered for home use because of new techniques. In the Dahlquist tradition, the M Series solves many of the problems that still degrade the sound of other speaker systems. The Dahlquist M Series loudspeakers are the first fully enclosed systems to reproduce all the of the subtle, low level details of the music in the midst of extremely high level music signals. The reproduction of such dynamic shadings makes music come startlingly alive.

The Dahlquist M909

The M909 is a unique blend of technologies. This three-way system has the Dahlquist Un-Box enclosure and critically matched loudspeaker drivers, as do the other members of the M Series. But, in an exciting departure, the M909's specially designed midrange driver shares the cylindrical loading originally developed for the DD-20. as a result, the M909 not only gives the listener superb performance throughout the audio range it gives an extra measure of performance in the critical midrange, where most of the music "happens".

 

By using two matched high speed woofers, the M909 is able to deliver exceptional power in the bass and mid-bass regions. This brings home the type of sound power felt at a live concert -  and typically missing from home listening. These dual matched woofers have the additional benefit of providing a seamless transition to that all-important midrange.

Further, the M909 recreates a sound image of exceptional fidelity. The M909's reproduction of soundstage height, width, and depth draws the listener into the performance. These outstanding capabilities are apparent as life-sized images in space.

Thus, for the first time, experienced listeners can have it all-from a single loudspeaker system that fits in almost any size room, be it an intimate studio with a modestly powered receiver or a living room of generous proportions with high-powered, state-of-the-art electronics.

One of the hallmarks of Dahlquist loudspeakers is the coherency of the total sound. The M909's four drivers blend together seamlessly. As a result, harmonic relationships are accurately preserved. Individual instruments, and especially the human voice, retain their own distinct characters.

Naturally, as is expected from a Dahlquist loudspeaker system, the M909 incorporates as advanced and remarkable anti-diffraction technique which enhances accurate stereo imaging and greatly contributes to open, spacius, and accurate sound reproduction.