Micro Seiki BL-51

 Rotating Assembly

The massive platter sits atop an incredibly thick, 16 mm main shaft. Its concentricity is machined to within 0,4 microns. The bearing material is a special alloy lubricated by and suspended in a unique oil-bath damping system. Not only does the system negate the need for periodic user lubrication, it is unaffected by temperature changes and aging.

 Drive System

The brushless, servo-controlled motor is of the outer-rotor design and uses sophisticated electronic circuitry to maintain speed acciracy. The specially-engineered, low-tension drive belt is , made of a carbon/urethane compound for maximum longevity and is pround to a precise thickness of 0,45 mm. Motor speed is user variable.

 Genuine Wood base

One of the best acoustical damping materials know is wood. It is used as the base material for all Micro Seiki turntables and BL-51 is natural ebony finishes.

The model BL-51 can accommodate the following tonearms:

Micro MA-707, MA-701

SME 3009

Infinity Black Widow

ADC LMF-1, 2

Grace G-704, 707, 714

Stax UA-7

Specifications

Drive System:  belt drive

Speeds (selectable):  33-1/3 and 45 rpm

Speed Variation:  User variable to  ±3%

Wow and Flutter:  0,025% WRMS

Signal-to-Noise Ratio:  75 dB (DIN B)

Drive Motor:  FG servo DC motor

Platter Diameter:  310 mm (12.2")

Platter Weight:  2,3 kg (incl. Rubber mat)

Platter Material:  Diecase aluminum

Base Construction:  Multi-laminar natural wood

Finished:  Hand-rubber natural ebony

Power Requirements:  120, 200 - 240 V 50/60 Hz

Power Consumption:  1,2 Watts max.

Dimensions  (W x D x H):  510 x 405 x 175 mm

Weight:  11,8 kg

Micro Seiki MA-701

 MA-701

Low-Mass Straight Tonearm with Dual Radial Bearings

A special alluminum alloy is used to give the arm its formidable strength and exceptionally low mass. Both qualities are needed to take full advantage of todays, supercompliant cartridges. The straight-line geometry assures the most accurate tracing angles as well as contributing to the arm's low mass. A pair of precision radial bearings give the arm a lateral sensitivity of only 10 milligrams. Even the normally-over-looked signal connectors are of the constant wipe type, insuring contact maintenance at all times.

Headshell

Thanks to the use of carbon fibres, the headshell is as light and rigid as the arm itself. It joins the arm with a semi-integrated plug-in system that utiliizes thick gold-plated wiping-type contacts. Oxygen-free copper leads are used to exclude electromagnetic influences (eddy-current losses) resulting in exceptional transmission characteristics. (Improved S/N ratio).

Skating Force Cancellation

Anti-skating is provided by a precision-calibrted adjustment to exactly match vertical tracking force.

Oil Damped Cueing

Feather-light contact between stylus and record groove is provided by the oil-damped cueing system. It is silent, smooth and, at the end of a record, completely automatic.

Specifications

Type:  Dynamic balanced universal tonearm

Over lenght:  315 mm (12-3/8")

Effective lenght:  237 mm (9-3/8")

Overhang:  15 mm (5/8")

Offset Angle:  21°50'

Tracking Error:  less than 1,5°

Height Range :  43 - 83 mm (1-3/4" - 3-1/4")

Height Fine Adjustment (lever operation):  6 mm (0,23")

Recommended Cartridge Weight:  4 - 12 g (0,14 - 4,2 oz)

Anti-skating Device:  Spring tension type

Establishing of Anti-skating Force:  Relative to stylus pressure

Tonearm Lifter:  Delayed action type

Output Cable:  5 pin connector plug-in low capacity design (55PF/m)

Headshell (H707x):  4g (0,14 oz) made of carbon mixed

Connector: Plug-in type, with hard gold plating

Micro Seiki BL-91 (L)

 Belt Drive Turntable System (Armless)

Many manufacturers have been promoting the direct-drive motor at the expense of precision materials and manufacturing techniques. While direct-drive is capable of remarkable speed accuracy, the system does nothing toward maintaining that accuracy against the inevitable destructive effects of aging.

Our  philosophy is that there isno substitute for quality, precisoin and tank-like ruggedness.

 The BL-91 (L) turntable is the ultimate expression of that philosophy. Staring with a massive, thick,  12,2inch platter and employing special-alloy bearings machined and polished with techniques usually reserved for turbojet engines, Micro's engineers have devised an exclusive oil-bath damping system to support the entire rotating assembly in complete isolation from all mechanical resonaces.

A precision-ground drive belt connects the rotating assembly to the brushless, servo-controlled motor with total isolation from motorgenerated vibration. In fact, the BL-91 (L) is probably the smoothest, most vibration-free device of its kind ever built.

 Rotating Assembly

The massive platter sits atop an incredibly thick, 16 mm main shaft. Its concentricity is machined to within 0,4 microns. The bearing material is a special alloy lubricated by and suspended in a unique oil-bath damping system. Not only does the system negate the need for periodic user lubrication, it is unaffected by temperature changes and aging.

 Drive System

The brushless, servo-controlled motor is of the outer-rotor design and uses sophisticated electronic circuitry to maintain speed acciracy. The specially-engineered, low-tension drive belt is , made of a carbon/urethane compound for maximum longevity and is pround to a precise thickness of 0,45 mm. Motor speed is user variable.

 Electronics power Transformer

To service the servo electronics, a special transformer with a cutless core was developed. This extremely low-flux device reduces to near zero magnetically-induced hum when used with a moving-coil phono cartridge.

 Turntable Base

The base of the BL-91 (L) is made completely of multi-laminar natural woods,a dense, sturdy design that prevents the transmission of resonances and distortion forces. It is finished with hand-rubbed, natural-ebony veneer suspended on four sophisticated, anti-feedback feet.

 Brass TonearrmMounting Plate.

The tonearm mounting plate on the BL-91 is solid brass. It weighs 1,5 kg (2,0 kg for BL-91L). This plate keeps the tonearm fulcrum rigid, assuring accurate tracing angles and minimal tonearm resonances.

The standard plate will fit the following arms;  Micro Seiki, Audiocraft, Technics. Teac, Denon, JVC

Optional mounting plates are available for SME, Grace and other quality arms.

Specifications

Drive System:  belt drive

Speeds (selectable):  33-1/3 and 45 rpm

Speed Variation:  User variable to  ±6%

Wow and Flutter:  0,025% WRMS

Signal-to-Noise Ratio:  75 dB (DIN B)

Drive Motor:  4-pole, 6-slot outer rotor brushless type, servo-controlled

Platter Diameter:  310 mm (12.2")

Platter Weight:  3,5 kg (incl. Rubber mat)

Platter Material:  Diecase aluminum

Platter Moment of Inertia:  600 Kg-cm² (with rubber mat)

Base Construction:  Multi-laminar natural wood

Finished:  Hand-rubber natural ebony

Power Requirements:  120, 200 - 240 V 50/60 Hz

Power Consumption:  4 Watts max.

Dimensions BL-91 / BL-91L (W x D x H):  532 x 440 x 175 mm / 600 x 472 x 186 mm

Weight BL-91 / BL-91L:  16 kg / 22 kg

Micro Seiki MA-505 (LS, LX)

Micro Seiki model MA-505 Dynamic Balance Type Tonearm

 Specifications

Type:  Dynamic balanced universal tonearm

Over lenght:  322 mm (12,68")

Effective lenght:  237 mm (9,33")

Overhang:  15 mm (0,59")

Offset Angle:  21°50'

Tracking Error:  less than 1,5°

Height Adjustable Range From motor board surface to pivot center):  42 - 86 mm (1,65" - 3,39")

Height Fine Adjustment (lever operation):  6 mm (0,23")

Recommended Cartridge Weight:  4 - 10 g (0,13 - 0,35 oz)

w/subweight A : 9 -16 g (0,33 - 0,56 oz)

w/subweight B : 16 - 22,5 g (  0,56 - 0,79 oz)

Tracking Force Adjustment:  0 -3 g direct reading

 Micro Seiki model MA-505L/LS.

 is long limited version of MA-505 which was manufactured for pro, and MA-505LS is long version with silver wire. 

Micro Seiki model MA-505LX.

 is special long version of MA-505 which has heavier arm base, inner wire is pure cooper special order to Mogami corp 

Rotel RA-810

The RA-810 is propably one of the most versatile, most professional stereo pre-main amplifiers ever developed.  Possessing an abundant 180 watts music power, the specially designed split power supply drivers almost any quality speakers stably and smoothly. The direct coupling circuitry incorporated ensures an excellent frequency response and negligible IM distortion. The transistors used are all long-life, low-noise silicon types that give the RA-810 its superb S/N and extended dynamic range. Note that a wide 5 to 50,000 Hz power bandwidth and THD of 0,3% or less are also achieved by this highly advanced equipment. Naturally the controls and the connection facilities are just as awesome. Most of all, see the RA-810 in actual, and find out its personality yourself.

Special Features

All long-life, low-noise Silicon Transistors.

Direct Coupling Circuity.

Split Power Supply.

Specially designed protection circuits to prevent damages to your speakers and to the amplifier.

Separable Pre-Amp and Main-Amp sections for many versatile uses.

3-stages Direct Coupled pre-amplifier.

Usage of 2 pairs of speaker systems, one pair at a time or simultaneously at the same time.

Facility for two tape recorders, with monitoring and dubbing features.

Facility for two record players, with switcheable input sensitivities and impedances for one of them to match characteristics of your cartridge.

Facilities for a stereo tuner, two auxiliary inputs for such as another tape recorder and 8-track tape player.

Facility for two Tape DIN Jacks.

Facility for 3 AC Outlets.

Long-stroke Slide Tone Controls, convenient for precise and effective tone adjustments.

Volume Control, Selector Control, Mode Control, Monitor control, Speaker Selection Control and Balance Slide Control.

"Push-Push" type switches for Muting, Loudness, High and Low Filters, Tone and Power.

A Power Indicator Lamp for easy visual indication.

A front panel Headphone Jack.

Specifications

Power Amplifier Section

Total Music Power (IHF): 

180 watts at 4 Ω;

125 watts at 8 Ω

Continuous Power (RMS, both channel driven, THD less than 0,5%):

60 watts/channel at 4 Ω;

40 watts/channel at 8 Ω

Harmonic Distortion:  less than 0,3%  (20 -20,000 Hz at 40 W/ch)

Intermodulation Distortion:  0,1% at 40 W/ch

Frequency Response:  4 to 75,000 Hz; +0 -3 dB

Power Bandwidth (IHF):  5 to 50,000 Hz at 8 Ω

Input Sensitivity/Impedance:  1 V/30 k Ω

Damping Factor:  35 at 8 Ω

Speaker Impedance:  4 to 16 Ω

Pre-Amplifier Section

Output Voltage:  1 V (rated), 3 V (maximum)

Harmonic Distortion:  less than 0,1% at rated output voltage

Frequency Response:  3 to 50,000 Hz,  +0 -3 dB

Hum and Noise:

Phono 1 and 2 :  65 dB

Tuner, Tape In : 75 dB

Aux 1 and 2 : 75 dB

Residual Noise:  1,5 mV

Input Sensitivity/Impedance:

Phono 1 : 2 mV/ 100 k Ω

Phono 2 : 2, 4, 8 mV/30 k, 50 k, 100 k Ω

Tuner, Tape In : 200 mV/45 Ω

Aux 1 and 2 : 200 mV/45 Ω

Tape DIN : 330 mV/100 k Ω

Phono Equalizer:  EEF type, RIAA ±0,5 dB, 50 to 15,000 Hz

Phono Overload:  125 mV

Loudness Switch:  +10 dB at 50 Hz;  +6 dB at 10,000 Hz

High Filter:  -10 dB at 10 kHz

Low Filter:  -10 dB at 50 Hz

Muting Switch:  -20 dB at 1 kHz

Bass Control:  ±10 dB at 50 Hz

Treble Control:  ±10 dB at 10,000 Hz

Crosstalk:  43 dB at 1khz

Square Wave Risetime:  5 microseconds

General

Power Requirements:  100, 117, 220, 240 V 50/60 Hz

Power Consumption:  150 watts max.

Dimensions (W x H x D):  420 x 140 x 304 mm  (16½" x 5½" x 12")

Weight:  10 kg (22 lbs)

Tandberg TR-2075

 Very powerful amplifiers can degrade tuner and preamplifier performance. So separate components became the rule and -for years- the rule made sense. But now we,ve found ways to break the rule and build a very high-powered receiver with better performance for less cost than comparable separate components. We started with a high power toroidal transformer to eliminate stray electrical influence on other components within the unit. An expensive device not usually found in consumer products it offers superior stability and performance.

The transformer feeds two powerful amplifiers. They have a wide frequency range for transparent sound. Ample overload margin for low distortion. And true complementary, direct-coupled circuits. Four protective circuits help deliver this exceptionally clean high power safely to your speakers.

TR-2075 has separate preamplifiers for each input to keep low level signals noise-free. And sensitivity controls to equalize listening levels (First stages of amplification occur within millimeters of signal input. An expensive but effective way to achieve low noise and clean sound)

 The FM Section Features

MOSFET transistors, 4-pole ceramic filters and integrated circuits (IC's).

Automatic switchover to FM stereo with illuminated indicator.

Electronic tuning. Heavy flywheel making tuning a pleasure.

Muting for quiet tuning.

Large tuning and signal strength meters for spot-on tuning.

FM 25 µs de-emphasis switch for use with external Dolby decoder when receiving FM Dolby broadcasts.

The AM Section Features

2 MOSFET transistors in the HF stage and the mixer provide equally good reception with strong and weak aerial signals.

2 tuned RF circuits mean that the signal/noise ratio is excellent and the image frequency rejection ratio is greater than 90 dB.

The Audio Section Features

Extremely low distortion

2 inputs for transcription units, one with adjustable sensitivity. Large dynamic range.

2 inputs for tape recorders with adjustable sensitivity. Large dynamic range and Tape Monitor facility.

Copying facilities for 2 tape recorders

Output for tone-controlled programme

3 tone controls for each channel

3 filters, 2 high an 1 low. Steep slopes.

2 front output jacks for stereo headphones

Automatic protection against all kinds of overload.

Recommended speakers; Tandberg Studio Monitor 

 Push button electronic time delayed diode switching provides noise-free blends when changing program sources. This innovation allows us to put the controls in the best position for easy operation and the electronics where they can deliver the best performance. Independent tape-to-tape facilities add to the extreme versatility of TR-2075.

TR-2075 also offers electronic FM tuning for stability and long life. Phase-locked loop decoding for superb stereo separation. And phase linear filtering for low distortion. (Just a few of the reasons why this FM tuner/IF circuitry equals - or excels - any we know)

Large Tuning Meters

The TR-2075 has two tuning meters: the signal strength meter gives full scale deflection for strong aerial signals (200 mV). This meter also has a scale for indicating audio output power. The centre-zero meter makes it easy to tune-in FM stations spot on and is particularly important for stereo transmissions.

 Tape Monitor and Tape Copy

Both tape recorder inputs have a Tape Monitor facility permitting source and tape testing during recording. The Tape Copy facility allows copying in both directions between two tape recorders connected to the TR-2075. Copying can take place without affecting any other programme that is going to the loudspeakers.

Separate Output/Input Amplifier Section

The pre-amplifier and the power amplifier can both be used as separate units. At the back of the TR-2075 there are phono sockets for the input and output of each channel. This means you can connect the pre-amplifier to another amplifier or to other hi-fi unit. In the same way the power amplifier in the TR-2075 can be used independently.

Highly Efficient Ferrite-Rod Aerial

The Am aerial is situated at the back of the receiver and can be rotated through 270° to the best position for reception. The TR-2075 also has sockets for outdor aerials for  FM and AM.

Specifications

Amplifier Section

Output Power per channel, sine wave, with 1 kHz in 8 Ω /4 Ω:   95 W /120 W.   Both channels driven simultaneously DIN 45500

Output Power per channel , sine wave, from 20 to 20,000 Hz in 8 Ω:   75 W.   Both channels driven simultaneously. 0,15% Distortion

Distortion (with output power 1 dB below nominal and lower at 1 kHz in 8 Ω (4 Ω):  0,08%

Intermodulation (according to DIN 45 500):  0,15%

Damping Factor (nominal output power in 8 Ω (4 Ω):  60 (30) 20-20,000 Hz

Frequency Response (from linear inputs (-15 dB):  6 - 80,000 Hz

Channel Separation (at 1 kHz minimum):  60 dB

Tone Controls: 

Treble  Control at 10 kHz : ±15 dB

Frequenzy/Loudness at 10 kHz : +3 dB

Mid-Frequency Range at 1 kHz : ±7 dB

Bass Control at 50 Hz : ±15 Hz

Frequency/Loudness at 50 Hz : +8 dB

Low Filter -12 dB/oct, -3 dB at 70 Hz

1 High Filter  -12 dB/octave, -3 dB at 8 000 Hz

2 High Filter -6 dB/octave, -3 dB at 8 000 Hz

Input Sensitivity (nominal  output power in 8 Ω):

Tape 1 : 150 - 600 mV

Tape 2 (Extra) : 150 - 600 mV

Phono 1  Magn. (cer) : 2,2 - 10 mV

Phono 2 Magn. (cer.) : 3,0 mV

Signal-to-Noise Ratio (2x50W in 8 Ω according to DIN 45 500):

Tape 1 : 62 dB

Tape 2 (Extra) : 62 dB

Phono 1 : 60 dB

Phono 2 : 58 dB

Tuner Fm Section

Wave Band:  87,5 - 108 MHz

Frequency Response (-3dB):  20 - 15,000 Hz

Sensitivity in Mono (for 26 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  0,8 µV/1,6 µV

Sensitivity in Stereo (for 46 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  20 µV/40 µV

Signal-to-Noise Ratio (with 1 mV aerial voltage):

Unweighted (according to IHF),  Stereo/Mono : 75/78 dB

Weighted (according to DIN), Stereo/Mono : 62/66 dB

Unweighted (according to DIN) , Stereo/Mono : 65/68 dB

Distortion (according to DIN), Stereo/Mono :  0,15%/0,15%

Selectivity (according to IHF), ±400 Hz :  80 dB

Image Frequency Rejection Ratio:  70 dB

AM suppression:  70 dB

IF Rejection:  95 dB

Limiting (-3dB) with 75 Ω aerial impedance:  0,7 µV

Muting Thereshold with 75 Ω aerial impedance:  4 µV

Capture ratio:  0,9 dB

Channel Separation (accor. to DIN 45 500):  40 dB

Pilot Tone Suppression (accor. to DIN 45 500):  70 dB

38 kHz Suppression (accor. to DIN 45 500):  60 dB

Tuner AM Section

Wave Bands:  518 - 1600 kHz

Selectivity at 1 MHz ±9 kHz :  42 dB

Distortion with 30% modulation :  0,8%

Sensitivity at 1 MHz, 30% modulation , 20 dB S/N:  20 µV

General

Cabinet:  Delivered in Teak, Rosewood or Walnut

Mains Voltage:  240 V 50.60 Hz (internal tappings for 120-220-240 V)

Dimensions (W x H x D):  515 x 153 x 353 mm (20½" x 6" x 14")

Depth with knobs:  378 mm (15")

Weight:  12,5 kg (27,5 lbs)

Tandberg TR-2055

 The Audio Section Features

Adjustable sensitivity for one of the transcription unit inputs and for both the tape recorder inputs.

2 inputs for transcription units,and 2 tape recorders.

Both tape recorder inputs have a Tape Monitor facility.

Copying facilities for 2 tape recorders

Front output jack for recording a tone-controlled programme (Tape Contour Out)

Frequency/Loudness compensated volume control

2 filters, low and  High

2 front jacks for stereo headphones

Light diode indicators (LED) for the most important operational modes

Recommended speakers; Tandberg Studio Monitor 

 The FM Section Features

MOSFET transistors, 4-pole ceramic filters and integrated circuits (ICs).

Automatic switchover to FM stereo with illuminated indicator.

Electronic tuning. Heavy flywheel making tuning a pleasure.

Muting for quiet tuning.

Large tuning and signal strength meters for spot-on tuning.

FM 25 µs de-emphasis switch for use with external Dolby decoder when receiving FM Dolby broadcasts.

The AM Section Features

2 MOSFET transistors in the HF stage and the mixer provide equally good reception with strong and weak aerial signals.

2 tuned RF circuits mean that the signal/noise ratio is excellent and the image frequency rejection ratio is greater than 90 dB.

Specifications

Amplifier Section

Output Power per channel, sine wave, with 1 kHz in 8 Ω /4 Ω:   60 W /80 W.  Both channels driven simultaneously DIN 45500

Output Power per channel , sine wave, from 20 to 20,000 Hz in 8 Ω:   55 W.  Both channels driven simultaneously. 0,15% Distortion

Distortion (with output power 1 dB below nominal and lower at 1 kHz in 8 Ω (4 Ω):  0,08%

Intermodulation (according to DIN 45 500):  0,15%

Damping Factor (nominal output power in 8 Ω (4 Ω):  50 (25) 20-20,000 Hz

Frequency Response (from linear inputs (-15 dB): 76 - 80,000 Hz

Channel Separation (at 1 kHz minimum):  60 dB

Tone Controls: 

Treble  Control at 10 kHz : ±15 dB

Frequenzy/Loudness at 10 kHz : +3 dB

Bass Control at 50 Hz : ±15 Hz

Frequency/Loudness at 50 Hz : +8 dB

Low Filter -12 dB/oct, -3 dB at 70 Hz

1 High Filter  -12 dB/octave, -3 dB at 8 000 Hz

2 High Filter -6 dB/octave, -3 dB at 8 000 Hz

Input Sensitivity (nominal  output power in 8 Ω):

Tape 1 : 150 - 600 mV

Tape 2 (Extra) : 150 - 600 mV

Phono 1  Magn. (cer) : 2,2 - 10 mV

Phono 2 Magn. (cer.) : 3,0 mV

Signal-to-Noise Ratio (2x50W in 8 Ω according to DIN 45 500):

Tape 1 : 62 dB

Tape 2 (Extra) : 62 dB

Phono 1 : 60 dB

Phono 2 : 58 dB

Tuner Fm Section

Wave Band:  87,5 - 108 MHz

Frequency Response (-3dB):  20 - 15,000 Hz

Sensitivity in Mono (for 26 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  0,8 µV/1,6 µV

Sensitivity in Stereo (for 46 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  20 µV/40 µV

Signal-to-Noise Ratio (with 1 mV aerial voltage):

Unweighted (according to IHF),  Stereo/Mono : 75/78 dB

Weighted (according to DIN), Stereo/Mono : 62/66 dB

Unweighted (according to DIN) , Stereo/Mono : 65/68 dB

Distortion (according to DIN), Stereo/Mono :  0,15%/0,15%

Selectivity (according to IHF), ±400 Hz :  80 dB

Image Frequency Rejection Ratio:  70 dB

AM suppression:  70 dB

IF Rejection:  95 dB

Limiting (-3dB) with 75 Ω aerial impedance:  0,7 µV

Muting Thereshold with 75 Ω aerial impedance:  4 µV

Capture ratio:  0,9 dB

Channel Separation (accor. to DIN 45 500):  40 dB

Pilot Tone Suppression (accor. to DIN 45 500):  70 dB

38 kHz Suppression (accor. to DIN 45 500):  60 dB

General

Cabinet:  Delivered in Teak, Rosewood or Walnut

Mains Voltage:  240 V 50.60 Hz (internal tappings for 120-220-240 V)

Dimensions (W x H x D):  510 x 153 x 353 mm (20" x 6" x 14")

Depth with knobs:  377 mm (15")

Weight:  13 kg (28-3/4 lbs)

Tandberg TR-2025

 The TR-2025 completes the TR 2000 series - 3 top models to meet a variety of needs and pockets. The stereo FM section has pre-tuning for 5 stations. The power amplifiers deliver more than 2 x25 watts in 8 ohms over the complete frequency range from 20 to 20,000 Hz with less than 0,15% total distortion.

 The FM Section Features

Excellent stereo tuner.MOSFET, IC's, and 3x 4-pole ceramic filters providing extremely good sensitivity and selectivity.

Automatic switchover to FM Stereo

Automatic frequency control (AFC) disconnects itself during tuning and connects itself again when tuning is completed. Can also be operated manually.

Heavy flywheel gives smooth, precise tuning.

Muting for quiet tuning.

 DiN sockets for 2 tape recorders. Both inputs have Tape Monitor facility

Input for transcripton unit (mag. p.u.)

Copying facilities for 2 tape recorders simultaneously

Low and High filters

Frequency / loudness compensated volume control

Front output jack for stereo headphones

Specifications

Amplifier Section

Output Power per channel, sine wave, with 1 kHz in 8 Ω /4 Ω:   32 W /40 W.  Both channels driven simultaneously DIN 45500

Output Power per channel , sine wave, from 20 to 20,000 Hz in 8 Ω:   25 W.   Both channels driven simultaneously. 0,15% Distortion

Distortion (with output power 1 dB below nominal and lower at 1 kHz in 8 Ω (4 Ω):  0,08%

Intermodulation (according to DIN 45 500):  0,15%

Damping Factor (nominal output power in 8 Ω (4 Ω):  65 (25) 20-20,000 Hz

Frequency Response (from linear inputs (-15 dB):  8 - 50,000 Hz

Channel Separation (at 1 kHz minimum):  60 dB

Tone Controls: 

Treble  Control at 10 kHz : ±15 dB

Frequenzy/Loudness at 10 kHz : +3 dB

Bass Control at 50 Hz : ±15 Hz

Frequency/Loudness at 50 Hz : +9 dB

Low Filter -12 dB/oct, -3 dB at 70 Hz

1 High Filter  -12 dB/octave, -3 dB at 8 000 Hz

Input Sensitivity (nominal  output power in 8 Ω):

Tape 1 : 170 mV

Tape 2 (Extra) : 170 mV

Phono 1  Magn. (cer) : 2,3 mV

Signal-to-Noise Ratio (2x50W in 8 Ω according to DIN 45 500):

Tape 1 : 61 dB

Tape 2 (Extra) : 61 dB

Phono 1 : 60 dB

Tuner Fm Section

Wave Band:  87,5 - 108 MHz

Frequency Response (-3dB):  20 - 15,000 Hz

Sensitivity in Mono (for 26 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  0,8 µV/1,6 µV

Sensitivity in Stereo (for 46 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  20 µV/40 µV

Signal-to-Noise Ratio (with 1 mV aerial voltage):

Unweighted (according to IHF),  Stereo/Mono : 70/72 dB

Weighted (according to DIN), Stereo/Mono : 60/62 dB

Unweighted (according to DIN) , Stereo/Mono : 63/65 dB

Distortion (according to DIN), Stereo/Mono :  0,4%/0,2%

Selectivity (according to IHF), ±400 Hz :  75 dB

Image Frequency Rejection Ratio:  70 dB

AM suppression:  65 dB

IF Rejection:  95 dB

Limiting (-3dB) with 75 Ω aerial impedance:  0,7 µV

Muting Thereshold with 75 Ω aerial impedance:  3 µV

Capture ratio:  1,5 dB

Channel Separation (accor. to DIN 45 500):  40 dB

Pilot Tone Suppression (accor. to DIN 45 500):  55 dB

38 kHz Suppression (accor. to DIN 45 500):  55 dB

General

Cabinet:  Delivered in Teak, Rosewood or Walnut

Mains Voltage:  240 V 50.60 Hz (internal tappings for 120-220-240 V)

Dimensions (W x H x D):  515 x 143 x 320 mm (20½" x 5¾" x 12¾")

Depth with knobs:  322 mm (13¼")

Weight:  8,3 kg (19 lbs)

Garrard 401

 The Garrard 401 which operates at three standard speed is produced to the highest  technical specification to meet the most exacting requirements of radio, television and recording studios as well as for high-fidelity enthusiasts.

Styled by one of Britain's leading designers it presents an elegant appearance in metallescent charcoal with chrome relief. The balanced, machined turntable is an aluminium, gravity casting weighing approximately 6 lb.

Accurately spaced, gear-cut stroboscopic markings on the periphery of the turntable are illuminated by a high-intensity neon lamp situated in the rigid aluminium base plate.

This is a unique feature of the 401 and enables the user visually to check that the turntable is running at exactly the correct speed.

 Fine speed adjustment is achieved by means of an eddy current brake; a control on the unit base allowing the speed to be veried by plus or minus 3 per cent.

The high - and low-range (110 -125 V and 220-250 V) shaded-pole induction motor, encased in a heavy iron casting to provide full magnetic screening, is isolated from the base plate by six tensioned springs. This provides an effective vibration barrier between the motor and the rest of the unit. The spindle is machined from a high grade of steel which is then hardened, tempered, ground and superfinished.

A double-pole switch is used for the power supply to the motor and is fully supressed. Each unit undergoes the most rigorous inspection and test, and the final performance figures are recorded on an individual test report which accompanies the unit.

 Every Gerrard Unit is 100% inspected on the very latest electronic test equipment to make sure that it conforms to the high standard of quality and reliability for which Garrard are world-wide renowed.

All Garrard units are wired for stereo reproduction (also suitable for mono) and all automatic turntables have facilities for manual (single record) operation.

Each model has been specially designed to meet specific and exacting requirements giving a complete range from the highest quality transcription tuntable to the popular priced automatic and single record-playing units.

 Leading designers keep Garrard to the forefront in contemporary styling.

Special durable finishes are used, making every Garrard unit suitable for tropical conditions.

Each unit is supplied with template (giving all dimensions), transit or fixing screws, installation and operating instructions.

Units not supplied with pickup cartridge should be fitted with the cartridge of your choice. For advice, consult your dealer.

All Garrard models are designed to play records conforming to I.E.C. Publication 98, BS1928;1965, and equivalent national standards.

Specifications

Type:  Professional,  3-speed Idler-drive turntable

Platter:  Diecast aluminium with an anti-static rubber mat and stroboscopic engraving on rim

Platter Diameter/Weight:  305 mm (12")/2,5 kg (6 lb)

Base Plate:  Diecast aluminium, ribbed for rigidity

Motor:  Shaded-pole induction type, magnetically screened by a heavy cast-iron case and suspended on 6 tensioned springs, dynamically balanced roto within exceptionally close limits.

Motor Switch:  Double-pole, fitted with a switch click supressor across each pole

Speed Ranges:  33-1/3,  45 and 78 rpm (31.9 - 34.6;  43.2 - 46.8 and 75 - 81 rev/min)

Wow:  Less than 0.08% RMS

Flutter:  Less than 0.04% RMS

Rumble:  negligible

Insulation: Tested at 1500 volts AC for 1 minute between motor windings and frame and at 500 volts DC with an insulation test meter when a resistance greater than 20 megohms must be registered.

Voltage:  Dual range 110/125 and 220/250 volts AC

Frequency:  50 or 60 Hz dependent on motor pulley and platter fitted

Power Consumption:  Approx. 12  watts

Dimensions: 

371 mm (14-5/8") from back to front,

349 mm (13-3/4") wide,

51 mm (2") above and 100 mm (3-15/16") below underside of base plate

Weight:  7.9 kg (17,5 lbs)