Luxman PD-121/131 turntable

Direct-drive turntable (without tonearm0

Brand-new direct-drive turntable with fully electronic controlled brushless DC servo motor, featuring bayonet arm-base mounting, unique mirror stroboscope system.

Features

Brushless DC srvo-controlled motor ensures excellent stability of rotational speed and offers high torque

Special arm-base mounting is used for easy replacement (one touch system) of tonearm of your choice. (No tonearm is supplied with this turntable)

Smart and ultra slim appearance yet resistant to howling and floor vibration

Turntable platter designed as to give not only necessary inertia but possible heaviest weight in consideration of motor bearing and resonance/tension of each part of the turntable

Insulator, compliance and control required for prevention of vibration is obtained by combination of spring, rubber and silicon grease.

Acrylite case, 4 mm thick dust cover.

Feather-touch On/Off micro switch

 

Generally speaking, manufacturers design a product and place great stress on cost performance and additional effort is paid as to where the compromise is made. In the case of audiophiles, importance is attached to what they seek or want to do rather than its cost.

This turntable Luxman now proudly announce is designed purely from the concept of audiophiles - slim and compact appearance, rugged construction resistant to howling and external vibration, arm base where one's favorite tone-arm could be fixed by a single touch and performance stability. Look at the internal construction and you will surely notice the above philosophy throughout.

 

Motor Suspension

The most unique feature of this turntable is the motor suspending structure. The robust chassis of aluminum die-casting integrates the tonearm base. For the upper panel, anodized aluminum of 3mm thick is used, which is, through rubber, fixed to the wood frame thus providing damping effect. Net weight is 13 kg (PD-121) and 11 kg (PD-131), which contributes effectively to prevent howling feedback or floor vibration.

 

Bayonet Mount Tonearm Base

A tonearm is not provided with the PD-121 (and PD-131). But the elaborate bayonet mount type tonearm base , similar in principle to that used in cameras, is adopted to ensure quick interchangeability of various famous tonearms with easy "one touch" operation

 

Unique Stroboscope

A unique idea is adopted for the stroboscope to ensure an easy and pleasant check of the turntable rotation. In order to make the stroboscope pattern very clear a black light tube is fired by very short duration pulses and a special "dayglo" paint has been used for the strobo markings. Further the line frequency indication can be identified by colour yellow for 50 Hz and yellow/green for 60 Hz.

 

Chassis, wooden frame and panel

Aluminum die-cast chassis with sufficient strength and weight, 3 mm thick anodized aluminium panel are firmly assembled together with rubber and elegant wooden frame with bumper effect which keeps this turntable immune from vibration

 

Insulator of Triple Structure

A special and unique insulator has been developed to ensure best possible anti-vibration. Each spring is damped by rubber, and the whole damper mechanism is suspended in silicon-grease. This is really and effective insulator and necessary compliance and damping effect are beautifully integrated.

 

Specifications:

Phono Motor Section

Driving System:  Direct-drive system

Motor:  DC servo brushless motor

Turntable Platter:  300 mm (12") aluminum die-cast

Platter Weight:  2,4 kg including platter-mat (1,9 kg PD-131)

Speed Rotation:  33-⅓ and 45 rpm

Adjustable Range of Rotation:  ±4% independently for each speed

Signal-to-Noise Ratio:  no less than 70 dB (ICE-B)

Wow and Flutter:  no more than 0,03% WRMS

Additional

Dust Cover:  4 mm thick acrylic resin Detachable with pre set hinge stop

Stroboscope:  Mirror system, speed indication by means of black light

Insulator:  adjustable height

General

Power Requirements:  110, 120 220, 240 V 50/60 Hz

Power Consumption: 

During Rotation :  6 W (PD-121) 5 W (PD-131)

At Start :  20 W (PD-121) 14,5 W (PD-131)

Dimensions (W x H x D):  472 x 144 x 3375 mm (18-5/8" x 5-11/16" x 14-11/16")

Weight: 

PD-121 (net) : 13 kg (29 lbs)

PD-131 (net) ;  11 kg (24 lbs)

 

Luxman PD-277 turntable

Fully Automatic Direct-Drive Turntable

 

Brushless, Slotless DC Servo Motor

The servo-controlled direct drive brushless DC motor with its gapless pole design is totally free from cogging or pulsing that plagues many other direct-drive turntables, ensuring superb Wow and Flutter characteristics. The high-inertia platter distributes its large mass evenly around the contour.

 

Straight Tonearm

The straight, statically-balanced tonearm has several important features. For exampling, the vertical pivots extend through the arm rather than simply suspending it from the outside. This minimizes lateral play, and assures that the stylus remains always perpendicular to the disc. Also, the arm's nested double-tube construction and internal damping deal most effectively with resonance.

The headshell is integrated to the tonearm. This system is much better than changing headshells, since it minimizes mass at the critical point of the tonearm, removing possible poor contact of the cartridge terminals.

 

Mirror Reflex Stroboscope

The unique stroboscope system of mirror-reflection type is featured, which makes it easy to adjust an accurate rotation speed.

 

Feather-Touch Operation

An electronic sensing system offers feather-touch operation of the auto-start and cut-off functions, giving no mechanical loads.

 

Platter Mat

The platter mat is so designed as to realize firm retention of the disc. To minimize unnecessary space between the disc and mat, the plane is procured between the two by making the platter contour match that of the disc.

This mat damps not only the disc but the platter itself thanks to its high-density rubber material, and it is exactly inlaid to the platter. Its specially treated surface ensures superb contact to the disc.

 

Dust Cover

An acrylic resin is used for the dust cover, which provides very smooth surface and excelent result against acoustic feedback. Simi-free-stop hinges make the entire dust detachable.

 

Other features

The power-on/off and speed selector, manual-auto-repeat selector, and auto-start and cut-off buttons are most logically placed in consideration of human engineering. Also, all the necessary functions are provided such as oil-damped cueing system, inside-force cancellor, etc.

 

Specifications:

Phono Motor Section

Driving System:  Direct-drive system

Motor:  DC servo brushless and slotless motor

Turntable Platter:  300 mm aluminium die-cast

Platter Weight:  1,8 kg including platter-mat

Speed Rotation:  33-⅓ and 45 rpm

Adjustable Range of Rotation:  ±4%

Signal-to-Noise Ratio:  no less than 60 dB (ICE-B)

Wow and Flutter:  no more than 0,03% WRMS

Tonearm Section

Tonearm:  Straight Arm of static balance type

Effective Length:  240 mm

Tracking Error:  +2°13', -1°08'

Overhang:  15 mm

Cartridge Weight:  4 g - 11 g

Cartridge Height:  16 mm - 19 mm (by use of spacers)

Stylus Pressure:  0 - 3 g (direct reading)

Accessories:  Anti-skate adjustment, tonearm elevation

Additional

Dust Cover:  Detachable with semi-freestop hinge

Stroboscope:  Mirror-reflex type

Automatic Function:  Auto-Start; Auto-Repeate Cut-Off

General

Power Requirements:  110, 120 220, 240 V 50/60 Hz

Power Consumption:  12 W

Dimensions (W x H x D):  472 x 152 x 348 mm (18-37/64" x 6" x 13-45/64")

Weight:  10 kg (22 lbs) net

 

JVC L-A31 turntable

Auto-Return Direct -Drive Turntable

Features

Cog-free coreless DC servo motor

FG direct-drive system

Low-mass straight tonearm

Up-front controls

Auto return convenience and pitch control

 

Sharing many features with JVC's more advanced turntables is the L-A31. like every other JVC turntable, it has the JVC-exclusive cog-free coreless DC servo motor to smooth rotation and deliver high torque, and our FG direct-drive system to maintain speed accuracy. Rotational speed is constantly adjusted against any variations, whatever the cause. Our low-mass straight tonearm is consistent with current thoughts on the subject; low-mass improves tracking, allowing the use of even quality high-compliance cartridges. Its straight design further reduces mass and increases rigidity. Resonance is optimally just above warp frequencies while remaining below audible frequencies and our ultra-light non-resonating headshell is included. Operation is simple, convenient and smooth. Controls are up-front, outside the closed dust cover - even arm cueing. Cueing and end-of-play auto return are two amenities added to protect records and stylus. Record handling is reduced to a minimum. Other features are the built-in strobe and a pitch control for "tuning" your records. We're sure that feature for feature and spec for spec, there isn't a finer turntable available.

 

Specifications:

Motor

Type :  Coreless DC servo motor

Drive System :  Direct-drive system

Wow and Flutter:  0,03% (WRMS); 0,05% (DIN)

Signal-to-Noise Ratio:  75 dB(DIN-B)

Platter:  295 mm die-cast aluminum alloy

Tonearm

Type:  Statically-balanced arm on Tracking Hold system

Effective Length:  220 mm

Tracking Error:  +3°35', -0°43'

Overhang:  15 mm

Tracking Force:  0 - 3g (o,1 steps)

Cartridge Weight (Headshell Included):  8,5 - 12,0 g

Operation Mode:  Auto-return

General

Dimensions (W x H x D):  420 x 115 x 355 mm (16-9/16" x 4-1/2" x 14")

Weight:  5,2 kg (11,4 lbs)

 

JVC L-A21 turntable

 

Auto-Return Belt-Drive Turntable

Features:

Quiet and accurate belt-drive

Precision synchronous motor

Low-mass straight tonearm

Up-front controls

Auto return convenience

 

The design objectives for our lowest cost turntable were for the most performance and features at a price easily accessible to anyone. Check the features and specifications of the L-A21 and you'll agree that we met all our design objectives. Our reliable belt-drive system eliminates vibration and noise and promotes smooth platter rotation. And our motor is an advanced synchronous type - impervious to changes in line voltage. Our tonearm, like those found on our more expensive models, is of a low-mass design for high tracking and low distortion while its straight tube design reduces spurious movement of the arm due to dynamic torsion. Our special headshell is non-resonant yet extremely rigid. We've also included a cueing device and the auto return mechanism. Like all its operating controls, the cue button is outside the closed dust cover so there's little chance of nudging the tonearm and damaging record or stylus . All in all, a great bargain at any price.

 

Specifications:

Motor

Type :  4-pole synchronous motor

Drive System :  Belt-drive system

Wow and Flutter:  0,08% (DIN)

Signal-to-Noise Ratio:  63 dB(DIN-B)

Platter:  300 mm die-cast aluminum alloy

Tonearm

Type:  Statically-balanced straight arm

Effective Length:  220 mm

Tracking Error:  +4°, -0°48'

Overhang:  15 mm

Tracking Force:  0 - 3g

Cartridge Weight (Headshell Included):  8,5 - 11,5 g

Operation Mode:  Auto-return

General

Dimensions (W x H x D):  420 x 115 x 350 mm (16-9/16" x 4-1/2" x 14")

Weight:  4,5 kg (9,9 lbs)

IMF TLS80 II loudspeakers

Based upon the world acclaimed Reference Standard Professional Loudspeakers, the Monitor TLS80 fulfills the need of the dedicated audiophile for a speaker of comparable quality, but tailored for home use.

Full transmission line loading incorporates new damping materials. Acoustic foam, as used in anechoic chambers, is "sculptured" to produce a wedge effect where the maximum surface area is exposed to damp the line, yet presenting the minimum of restriction. A separate midrange line is similarly terminated whilst standing waves are progressively absorbed by long hair wool. Both a tweeter and a super-tweeter are employed to ensure power handling conducive with wide dispersion and extended response beyond the limits of human hearing. Only a transmission line can provide the dynamic impact experienced in the concert hall. Bass is reproduced within the listening room rather than in a box. If there were a better method of loading, we would have employed it.

The whole system is integrated by a complex crossover, developed as the result of research in depth into the problems of phase correction, impulse response and amplifier matching. A three position "Tilt" control enables the energy response to be modified from nominally flat to "Rise" or "Fall", compensating for the location, the characteristics of ancillary equipment, or even personal preference.

 

 Like the Reference Standard, the speakers are designed to be used on the stands provided. These ensure that the loudspeakers are supported off the floor, reducing room colouration components. Importantly they slightly tilt the speakers back, maintaining a substantially flat response both axially and hemispherically.

 

 There is very little that need be said about the Monitor, which is both neutral yet exciting. Supplied in matched "mirror image" pairs the stereo presentation is stable, portraying great detail with the uncanny ability to reproduce the acoustic environment of the original performance. We suggest that you audition these speakers with the finest ancillary equipment. In the tradition of our monitoring approach to loudspeaker design the TLS 80 is capable of providing greater satisfaction over a wider range of programme material.

 

Specifications

Drive Units

Bass :  300 x 210 mm (11,75" x 8,25") flat polystyrene bass unit loaded by transmission line

Mid :  150 mm (6") plastic cone midrange in separate line

High :  45 mm (1,75") diaphragm high gauss tweeter; 20 mm (0,75") chemical dome super-tweeter

Crossover:  Electrical four way at 350 Hz, 3 kHz and 13 kHz

Frequency Range:  20 Hz to beyond audibility

Control:  Tilt

Matching Impedance:  4 - 8 Ω

Efficiency (Measured via Pink Noise at 1 m for 40 W):  98 dB (dependent on Control setting)

Driving Power Requirement:  40 - 100 watts

Dimensions (W x H x D):  460 x 980 x 410 mm(18" x 38,5" x 16")

Overall height on stand: allow 1070 mm (42")

Weight (Net/ Gross):  37 kg / 45 kg

Stands Weight (Net/Gross):  7 kg (each)/ 20 kg (pair)

 

Castle Isis loudspeakers

In this digital, computer age loudspeakers are often seen as poor relations of the electronics in a hi-fi or home cinema system. As electro-acoustic devices they are often, incorrectly thought of, as "old" technology - one design indistinguishable from another. You couldn't be more wrong.

 

The Castle Isis sets new performance standards for a speaker of its compact dimensions thanks to the use of castle designed and developed advanced technology drive units. Smooth high frequency detail is delivered by our 25 mm polyamide dome tweeter. Its shallow horn loading ensures good treble dispersion on and off-axis for a wide listening area.

The 130 mm mid/bass driver is built into a strudy die-cast chassis with a lightweight injection moulded plastic cone. A high temperature Kapton voice coil former is used to allow the driver to produce high levels of clean, undistorted sound. A simple crossover, employing audiophile quality components, integrates these exceptional drivers without sacrificing transparency or "slam"

The Castle Isis cabinet is pleasingly proportionated with a front-facing reflex port that suits it equally to bookshelf or stand use.

 

Specifications

Frequency Response:  60 Hz - 20,000 Hz

Nominal Impedance: 8 Ω

Sensitivity:  87 dB for 1W at 1m

Amplifier requirements:  20 - 80 watts

System type:  Reflex

Drivr Unit

Bass :  130 mm in a cast chassis with injection moulded cone

Treble :  25 mm composite soft dome

Dimensions (W x H x D):  170 x 350 x 195 mm

Weight (Packed):  11,6 kg

 

Acoustic Research AR-28B loudspeakers

This group of speakers - the AR -28b, -18b, and 8b - exemplify a fundamental belief we have held through nearly three decades of acoustic research. Listeners whose system options are highly restricted by budgetary considerations need not be deprived of true quality sound. These B-series acoustic suspension speakers use long throw woofers with energy absorbent diaphragms damped to an extremely low Q. the bass stays tight and clean, even at 100 watts of power on the 28b and 18 b, and 75 watts on the 8b. For added protection during peak power surges, the 1-1/4-inch high range drivers are cooled with magnetic fluid and fitted with S-Shaped lead outs.

A special feature of the 28b is a new 8-inch woofer that produces remarkably smooth frequency response in the mid-range, the critical aera for vocal reproduction.

Acoustic Research proudly presents three types of loudspeaker systems and one great sound.

 

AR-28B Specifications

System Type:  Bookshelf acoustic suspension, 2-way system with drive units in vertical array

Drive Units:

LF :  200 mm (8") long-throw acoustic suspension woofer

HF :  32 mm (1-1/4") liquid cooled cone high range driver

Voltage Sensitivity:  2,83 watts produces 88 dB SPL at 1 meter on axis

Efficiency:  1 watt produces 88 dB SPL a 1 meter on axis

Power Requirement:  10 watts per channel minimum

Power Handling Ability:  maybe used with amplifiers rated at up to 100 watts per channel

System Frequency Response:  -3 dB (half power) points at 52 Hz and at 22,000 Hz

System Low Frequency Performance:  -3 dB at 52 Hz with an effective Q at resonance of 10

Impedance:  8 Ω  nominal

Crossover Network:  Woofer has a 12 dB/octave mechanical crossover. High range has a first order electrical network plus mechanical slope to give a total of 18 dB/octave

Crossover Frequency:  2,000 Hz

Cabinet Internal Volume:  14,75 litres (52 cu.ft)

Cabinet Dimensions (W x H x D):  279 x 508 x 184 mm (11" x 20" x 7-1/4")

Cabinet Finish:  Walnut or oak grain vinyl veneer

Weight:  8,6 kg (19 lbs) 1 speaker; 19,2 kg (42,3 lbs) 2 speakers packed in carton (shipping)

 

Acoustic Research AR-18B loudspeakers

This speakers - the AR-18b - exemplify a fundamental belief we have held through nearly three decades of acoustic research. Listeners whose system options are highly restricted by budgetary considerations need not be deprived of true quality sound. These B-series acoustic suspension speakers use long throw woofers with energy absorbent diaphragms damped to an extremely low Q. the bass stays tight and clean, even at 100 watts of power on the 18b,  For added protection during peak power surges, the 1-1/4-inch high range drivers are cooled with magnetic fluid and fitted with S-Shaped lead outs.

Acoustic Research proudly presents three types of loudspeaker systems and one great sound.

 

AR-18B Specifications

System Type:  Bookshelf acoustic suspension, 2-way system with drive units in vertical array

Drive Units:

LF :  200 mm (8") acoustic suspension woofer

HF :  32 mm (1-1/4") liquid cooled cone high range driver

Voltage Sensitivity:  2,83 watts produces 88 dB SPL at 1 meter on axis

Efficiency:  1 watt produces 88 dB SPL a 1 meter on axis

Power Requirement:  10 watts per channel minimum

Power Handling Ability:  maybe used with amplifiers rated at up to 100 watts per channel

System Frequency Response:  -3 dB (half power) points at 62 Hz and at 22,000 Hz

System Low Frequency Performance:  -3 dB at 62 Hz with an effective Q at resonance of 10

Impedance:  8 Ω  nominal

Crossover Network:  Woofer has a 12 dB/octave machanical crossover. High range has a first order electrical network plus mechanical slope to give a total of 18 dB/octave

Crossover Frequency:  2,000 Hz

Cabinet Internal Volume:  9,86 litres (35 cu.ft)

Cabinet Dimensions (W x H x D):  267 x 432 x 168 mm (10-1/2" x 17" x 6-5/8")

Cabinet Finish:  Walnut or oak grain vinyl veneer

Weight:  6,8 kg (15 lbs) 1 speaker

 

Acoustic Research AR-8B loudspeakers

Acoustic Research proudly presents three types of loudspeaker systems and one great sound.

This model of speakers - the AR-8b - exemplify a fundamental belief we have held through nearly three decades of acoustic research. Listeners whose system options are highly restricted by budgetary considerations need not be deprived of true quality sound. These B-series acoustic suspension speakers use long throw woofers with energy absorbent diaphragms damped to an extremely low Q. the bass stays tight and clean, even at 75 watts of power on the model 8b. For added protection during peak power surges, the 1-1/4-inch high range drivers are cooled with magnetic fluid and fitted with S-Shaped lead outs.

 

AR-8B Specifications

System Type:  Bookshelf acoustic suspension, 2-way system with drive units in vertical array

Drive Units:

LF :  150 mm (6") long-throw acoustic suspension woofer

HF :  32 mm (1-1/4") liquid cooled cone high range driver

Voltage Sensitivity:  2,83 watts produces 88 dB SPL at 1 meter on axis

Efficiency:  1 watt produces 88 dB SPL a 1 meter on axis

Power Requirement:  10 watts per channel minimum

Power Handling Ability:  maybe used with amplifiers rated at up to 75 watts per channel

System Frequency Response:  -3 dB (half power) points at 74 Hz and at 22,000 Hz

System Low Frequency Performance:  -3 dB at 74 Hz with an effective Q at resonance of 85

Impedance:  8 Ω  nominal

Crossover Network:  Woofer has a 12 dB/octave machanical crossover. High range has a first order electrical network plus mechanical slope to give a total of 18 dB/octave

Crossover Frequency:  2,000 Hz

Cabinet Internal Volume:  7,17 litres (25 cu.ft)

Cabinet Dimensions (W x H x D):  241 x 375 x 159 mm (9-1/2" x 14-3/4" x 6-1/4")

Cabinet Finish:  Walnut or oak grain vinyl veneer

Weight:  4,8 kg (10,5 lbs) 1 speaker; 10,9 kg (24 lbs) 2 speakers packed in carton (shipping)

 

Akai GX-210D reel-to-reel tape deck

Three Motor Automatic Reverse Stereo Tape Deck

GX-210D features 3-motor drive mechanism includes self-lubricating Hysteresis Synchronous Motor

To match the lasting performance of the GX Head, the GX-210D is equipped with Akai's unique self-lubricating capstan motor. The installation of two oil circulating mechanisms with cellulose fibres within the interior of the motor provides long lasting, trouble-free operation. Oil circulating speed is adjusted naturally according to motor revolutions and temperature, and because shaft rotation is always smooth and stable, various mechanical troubles resulting from oil circulation suspension do not occur. Further, these unique cellulose fibres also function as filters to keep the oil clean during the circulating process, adding to the motor's epoch-making longevity. Two highly efficient outer-rotor motors for supply and take-up reel drive assure consistent and smooth tape travel and ideal starting torque.

Other features

Automatic and Manual Reverse Playback

Akai's Exclusive Glass and X'tal Ferrite heads

Self-Lubricating Hysteresis Synchronous Capstan Drive Motor

Reel Drive Outer-Rotor Motors

Sturdy 2-Lever Control System

Instant Tape/Source Monitoring

Tape Selector for High Performance Low Noise Tape

Automatic Stop and pause Control

4-Digit Index Counter for Easy Indexing

Built-in Reel Retainers

 

Specifications

Track System:  4-track, 2-channel stereo system

Tape Speeds

7-1/2 ips (19 cm/sec) ±0,8%

3-3/4 ips (9,5 cm/sec) ±1%

Wow and Flutter

7-1/2 ips :  less than 0,08% (*0,12%) RMS

3-3/4 ips :  less than 0,12% (*0,25%) RMS

Total Wow and Flutter:  less than 0,18% RMS at 7-1/2 ips (Scotch #175 tape, 3,000 Hz recording and playback)

Frequency Response

S.R.T. Tape

7-1/2 ips :  30 to 25,000 Hz ±3 dB

3-3/4 ips :  40 to 20,000 Hz ±3 dB

Regular Tape

7-1/2 ips :  30 to 23,000 Hz ±3 dB

3-3/4 ips :  40 to 18,000 Hz ±3 dB

Total Harmonic Distortion:  less than 1,5%

Output Line :

1,228V (4 ±1 dB) at FWD mode, using a 250 Hz 0VU pre-recorded tape

1,228 V (4 ±1,5 dB) at REV mode, using a 250 Hz 0 VU pre-recording tape

Output DIN :  610 mV (-2 dB) using a 250 Hz 0 VU pre-recorded tape

Inputs

Mic :  better than 0,3 mV

Line :  better than 60 mV

DIN :  better than 5 mV (Low); 60 mV (High)

Recording/Playbackl Level: 1,228 V (4 ±1,5 dB ) at 7-1/2 ips 1,000 Hz 0 VU recording

Signal-to-Noise Ratio:  better than 50 dB (7-1/2 ips); better than 47 dB (3-3/4 ips)

Total Signal-to-Noise Ratio:  better than 47 dB at 7-1/2 ips

Crosstalk:  better than 45 dB

Erase Ratio:  better than 70 dB

Recording Bias Frequency:  102 kHz ±5%

Bias Leak:  less than -30 Vu

High Frequency Deviation

Between FED Channels :  within 3 dB

Between REV Channels :  within 4 dB

Between FWD-REV :  within 3,5 dB

Reversing Time :  2 to 3 seconds

Recording Capacity :  45 min. Stereo recording using a 1,800 ft tape at 7-1/2 ips

Fast Forward and Rewind Time:  110/90 sec. Using a 1,800 ft tape at 50/60 Hz

Motors

Capstan Motor :  2 speed Hysteresis Synchronous Motor

Type  :  HM2-16MC (winterized) 4-8 pole

Revolutions :  1,500/1,800 rpm at 50/60 Hz

Reel Motor :  Two 6-pole eddy current outer rotor motor

Type :  24XO-MR

Revolutions :  930/1,120 rpm at 50/60 Hz

Heads

Combo Recording/Erase Head

Type :  RE4-6 GX head

Gap :  3,5 to 5,5 micron (REC); 0,2 mm W Gap (Erase)

Impedance :  1,400 Ω  ±25% at 100 kHz (REC)

130 Ω  ±7% at 100 kHz (Erase)

DC Resistance :  5,5 Ω  (REC); 2,3 Ω  (Erase)

Playback Head

Type :  P4-202 GX Head

Gap :  1,2 to 2,2 micron

Impedance :  1,400 Ω  at 1,000 Hz

DC Resistance :  268 Ω

Semiconductors:  29 Transistors; 15 Diodes; 3 Zener Diodes

Power Requirements:  100 to 120 V, 220 to 240 V AC 50/60 Hz

Power Consumption:  100 W max

Dimensions (W x H x D):  368 x 371 x 227 mm (14,5" x 14,6" x 8,9")

Weight:  15,4 kg (33,9 lbs)

 

Akai 1730D-SS reel-to-reel

4-channel / 2-channel Stereo Tape Deck

An entirely new world of sound has been created by Akai's electronics engineers who have developed a new and sophisticated line of 4-channel surround stereo equipment. Included in this line are the exciting 1730D-SS 4-channel/2-channel Stereo Tape Deck and 1730-SS 4-Channel/2-Channel Stereo Tape recorder.

With either system, you're completely surrounded in sound with four speakers, left and right in front, and left and right in the rear. This system gives you a real "sense of presence", the feeling of being exactly in the middle of a live performance. Both models are designed to be used for not only 4-channel stereo but also 2-channel stereo as well.

The 1730D-SS is perfectly matched with Akai's exclusive AA-6100 amplifier. this amplifier has 80 W music power for dynamic 4-channel stereo sound and accommodates both 4-channel and 2-channel stereo operation.

 

Akai's dependable 2-lever system complements the high grade parts and robust construction of this rugged 4-channel/2-channel stereo model

It is regular practice to employ mechanical control in one-motor tape decks.  Akai has long since employed this 2-lever system in our one-motor decks. When compared to an ordinary 1-lever system, because the Play/Rec and F.Fwd/Rew Levers are independent, the movable range of the levers are shorter, and operation is lighter. Also, because the F. Fwd/Rew Lever is separate, mis-operation is minimized. Further, because of the mechanical structure of this control system, other parts are not unfavourably influenced and mechanism endurance is extended. Rectangular shaped Control Panel with proportionately balanced controls.

4-Head System

Durable 2-Lever Controls for Extra Dependability

Instant tape/Source Monitoring

Newly Designed Slanted Control Panel for Easy Operation

Front and Rear Channel Headphone jacks for Easy Monitoring or Private Headphone Listening

Automatic Stop and Shut-Off

4-Digit Index Counter

Built-in Reel Retainers

Pause Control

 

Specifications

Recording System:  In-line 4-track, 4-channel stereo and 4-track 2-channel stereo recording

Playback System:  In-line 4-track, 4-channel stereo and 4-Track, 2-channel stereo playback

Tape Speed:  3-3/4 and 7-1/2 ips

Speed Deviation:  within ±1,5% at all speeds

Reels:  7", 5"  reels can be used

Wow and Flutter:

7-1/2 ips :  less than 0,15% rms

3-3/4 ips :  less than 0,2% rms

Frequency Response

7-1/2 ips :  30 to 22,000 Hz ±3 dB

4-3/4 ips :  40 to 13,000 Hz ±3 dB

Signal-to-Noise Ratio:  better than 48 dB

Total Harmonic Distortion

Line Output :  within 2% at 1,000 Hz 0 VU recording

Main Output :  within 3% at 1,000 Hz 5W (8 Ω )

Crosstalk: less than -50 dn (track) -40 dB (channel)

Erase Ratio:  less than 70 dB

Insulation Resistance: better than 50 MΩ

Insulation Durability:  1,000 V AC for more than one minute duration

Line Output:  +4 dB ±1,5 dB (1,228 V), at 0 VU indication, 250 Hz 0 VU recorded Tape. Required load impedance more than 25 k Ω

DIN Output:  -6 dB ±1,5 dB when using a 250 Hz recorded tape. Required load impedance more than 50 k Ω

Line Input:  above 40 mV/ 330 k Ω

Mic. Input :  above 0,4 mV/30 k Ω

DIN Input :  above 20 mV/100 k Ω

Fast Forward and Rewind Time: 

90 sec. 1,200 ft. Tape at 50 Hz

70 sec. 1,200 ft. Tape at 60 Hz

Motor:  Hysteresis synchronous 2 speed motor

Horse Power :  1/100 HP

Power Ratio :  85%

Revolutions :  3,000 to 1,800 RPM (at 50 Hz); 3,600 to 1,800 RPM (at 60 Hz)

Condenser Capacity:  3 µF (at 50 Hz); 2 µF (at 60 Hz)

Heads

Recording:  In-line 4-track 4-channel stereo (4-track 2-channel stereo)

Impedance :  125 Ω  ±20% at 1,000 Hz

Gap :  4/1,000 mm

Playback :  In-line 4-track 4-channel stereo (4-track 2-channel stereo)

Impedance :  1,200 Ω  ±15% at 1,00 Hz

Gap :  2/1,000 mm

Erase head :  In-line 4-track 2-channel stereo

Impedance :  195 Ω  ±10% at 100 kHz

Erase Head :  In-line Full track

Impedance :  350 Ω  ±10% at 100 kHz

Power Supply:  100 to 240 V AC, 50/60 Hz

Power Consumption:  55 W

Dimensions (W x H x D):  420 x 450 x 240 mm (16,5" x 18" x 9,5")

Weight:  17 kg (37,5 lbs)