stereonomono

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

Showing posts with label Tape Recorder. Show all posts

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)

Akai GX-265D tape deck

Stereo Tape Deck

AC Servo Motor Direct Capstan Drive System

6 Head system Automatic and manual Reverse Recording and Playback

One each GX forward recording, GX reverse recording, GX forward playback, GX reverse playback, forward erase, and reverse erase head make up the superior GX Head reverse recording and Playback system of this model. The quality and special process of the GX Head materials result in a wider dynamic range, better high frequency characteristics and tone quality and longer lasting performance. Manual Reverse Button and Automatic Sensing Tape Reverse completely eliminate the necessity of inverting reels by hand.

Symmetrical Head Block Layout for identical performance in both directions.

The arrangement of the head block is completely symmetrical in relation to the center capstan. The short and equi-distant tape path within the head block and between heads and reel tables on both sides assure identical performance in both directions. Tension Arms on both the take-up and supply reel sides provide perfect tape tension, also contributing to operating stability.

AC Servo Motor for capstan drive, Wow and Flutter reduced to 0,06.

The GX-265D employs a 3 motor drive system with a new AC Servo Motor for direct capstan drive, Rubber belts, flywheels, etc. are eliminated for reduced interference. This coupled with the center capstan system of this model reduces wow and flutter to an amazing 0,06%.

Microphone/Line Mixing

Individual Microphone and Line Input Level Controls and a built-in mic-line mixing circuit facilitate easy sound mixing from two separate sources.

Quick Pause Control

Depress the pause Switch to immediately suspend reel movement. When Pause mode is effected, the pinch wheel separates from the capstan by only 0,5 mm for a quick and smooth start when released. Especially convenient for editing tape.

Dual Monitoring

Tape/Source Monitor Switch enables comparison of source signals with just records signals for more professional recording results.

Automatic Stop

The Tension Arm/Stop lever drops at the end of the tape, activating an automatic stop mechanism which completely stops reel movement for operating safety.

Individual Track Selectors for Monaural or Stereo Preformance

Recording mode can be effected using individual left or right channel selectors or both channels simultaneously. A Recording indicator Lamp lights to confirm recording mode.

Output Level Control Enables Connection with any Amplifier

An Output Level Control facilitates adjustment of output level to correspond with your amplifier input.

Tape Selector Switch

A Tape Selector Switch facilitates the use of Low Noise or Wide Range tape. While high performance low noise tape is standard for this machine, the ability to use wide range tape further extends high range frequency response.

Feather Touch Controls for Smooth and Easy Mode Selection

VU Meter Scales Extended to +5 VU for Precise level Indication.

Specifications

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

Reel Capacity: up to 7" reel

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

Wow and Flutter:

At 7-1/2 ips : less than 0,06% RMS

At 3-3/4 ips : less than 0,09% RMS

Frequency Response (using Akai LN-150-7 Tape)

At 7-1/2 ips : 30 Hz to 25,000 Hz (±3 dB)

At 3-3/4 ips : 30 Hz to 19,000 Hz (±3 dB)

Distortion: less than 0,5% (1,000 Hz, "0" VU)

Signal-to-Noise Ratio better than56 dB (measured via tape with peak recording level of +6 VU)

Erase Ratio: better than 70 dB

Bias Frequency: 100 kHz

Heads : 6 - One each GX forward recording, GX reverse recording, GX forward playback, GX reverse playback, forward erase, and reverse erase head

Motors: 3 - One AC Servo motor for capstan drive, two eddy current motors for reel drive

Fast Forward and Rewind Time: 90 seconds using a 1200 ft tape at 60 Hz

Output Jacks

Line : 2x 0,775 V (0 VU) Required load impedance more than 20 k Ω

Phone : 1x 30 mV/8 Ω

Input Jacks

Microphone : 2x 0,25 mV/5 k Ω

Line : 2x 70 mV/150 k Ω

DIN Jack: 0,5 V/3 mV

Semiconductors: 38 Transistors; 26 Diodes

Power Requirements: 100 V to 240 V 50/60 Hz

Power Consumption: 80 W

Dimensions (W x H x D): 441 x 404 x 207 mm (7,4" x 15,9" x 8,2")

Weight: 16,6 kg (36,5 lbs)

Sony TC756-2 reel-to-reel

The Sony TC756 set new records for performance of home tape decks.

Hirsch-Houck Laboratories further noted. "The dynamic range, distortion, flutter and frequency response performance are so far beyond the limitations of conventional program material that its virtues can hardly be appreciated".

The Sony TC756-2 features a closed loop dual capstan tape drive system that reduces wow and flutter to a minimum of 0,03% , logic controlled transport functions that permit the feather-touch control buttons to be operated in any sequence, at any time without spilling or damaging tape: an AC servo control capstan motor and an eight-pole induction motor for each of the two reels; a record equalization selector switch for maximum record and playback characteristics with either normal or special tapes; microphone attenuators that eliminate distortion caused by overdriving the microphone pre-amplifier stage when using sensitive condenser mics; tape/source monitoring switches that allow instantaneous comparison of program source to the actual recording; a mechanical memory capability that allows the machine to turn itself on and off automatically for unattended recording; and a full, two-year guarantee.

In addition, the TC756-2 offers 15 and 7-1/2 ips tape speeds; Ferrite & Ferrite 2-track/2-channel stereo three-head configuration; and symphase recording that allows you to record FM matrix or SQ** 4-channel sources for playback through a decoder-equipped 4-channel amplifier with virtually non-existent phase differences between channels.

The Sony TC756-2 is representative of the prestigious Sony 700 Series - the five best three-motor 10-1/2" reel home tape decks that Sony has ever engineered.

Specifications

Track System: 2-track 2-channel stereo (TC756-2); 4-track 2-channel stereo (TC756)

Reels: 270 mm (10-1/2 inches) or smaller

Tape Speed: 19 cm/s (7-1/2 ips), 38 cm/s (15 ips)

Recording Time: with 1,100 m (3360 ft) tape of 270 mm (10-1/2 inch) reel

3-hours stereo recording at 19 cm/s (7-1/2 ips) : TC756

1,5 hours stereo recording at 19 cm/s (7-1/2 ips) : TC756-2

Heads:

TC576 Model

Record : RF140-2902

Playback : PF142-4202

TC756-2 Model

Record : RF142-2202A

Playback : PF142-2202A

Motors:

Capstan : IC-624G (AC servo controlled)

Reel : IC-638R (2)

Frequency Response (with Sony SLH tape):

20 - 35,000 Hz at 38 cm/s (15 ips)

30 - 30,000 Hz ±3 dB at 38 cm/s (15 ips)

20 - 30,000 Hz at 19 cm/s (7-1/2 ips)

30 - 25,000 Hz ±3 dB at 19 cm/s (7-1/2 ips)

Signal-to-Noise Ratio

TC756 Model

Sony SLH Tape : 56 dB

Standard Tape : 53 dB

TC756-2 Model

Sony SLH Tape : 59 dB

Standard Tape : 56 dB

Wow and Flutter

0,04% (RMS) weighted at 38 cm/s (15 ips)

0,06% (RMS) weighted at 19 cm/s (7-1/2 ips)

Overall Distortion: 1,2%

Record Bias Frequency: approx 160 kHz

Input Sensitivity/Impedance

Mic : 0,19 mV (-72 dB) / low

Line In : 60 mV (-22 dB) / 100 k Ω

Output Level/Impedance

Line Out : 0,44 V (-5 dB) with 100 k Ω load / 100 k Ω

Headphone : 8 Ω Impedance

Rec/Power Bandwidth Connector (AEP, UK)

Input Impedance : 3,9 k Ω

Output Impedance : 8,2 k Ω

Semiconductors: 1 ICs; 2 FETs; 58 Transistors; 46 Diodes

AC Outlet (USA): Unswitched, 300 W maximum

Power Requirements: AC 120 V, 60 Hz (USA, Canada); AC 110, 127, 220 0r 240 V 50/60 Hz (AEP, UK)

Power Consumption: 100 W (USA); 110 W (AEP, UK, Canada)

Dimensions (W x H x D): 435 x 451 x 221 mm (17-1/8" x 17-3/4" x 8-3/4")

Weight: 24 kg (52 lb 14 oz)

Akai CR-80 SS cartridge tape recorder

8-Track, 4/2-Channel Cartridge Recording /Playback

Model CR-80 SS is equipped with a built-in 4-channel power amplifier and 4 Speaker Jacks for Instant 4-channel or 2-channel operation. This compact unit makes 4-channel stereo recording a "cinch" even where space is a factor. The same Akai robust mechanism for top rate performance and endurance. One Micron Gap Rec/Playback Head for amazing frequency response to 16,000 Hz

1-Micron Gap Head

Just what is a one-micron gap head? It's a head with a width of only one astounding micron. Until now two or four micron gap heads have been the standards for comparing tape recorders. However, Akai has pushed ahead and narrowed the head gap; thus narrowing the difference between tape recording results and actual sound.

The Akai perfected one-micron gap head has these distinctive advantages over heads with wider gaps:

A - Excellent Frequency Response even at low tape speed

B - Clear, high pitched sound can be regenerated as a frequency tone and recorded smoothly with a minimum of distortion.

Motor

The motor of model CR-80 SS is a condenser starting two-speed induction motor. The winding characteristics of this 2-8 pole motor provides tape-speed stability and minimizes distortion

Other features:

Public Address System - this unit can easily be converted into a P.A. System

Automatic Stop/Continuous Play

4/2 Channel Stereo Selector

Inputa and Phone Selector

Program Indicator Lamp

Specifications

Track System: 8-track, 4-channel /2-channel compatible stereo

Tape Speed: 3-3/4 ips

Wow and Flutter: less than 0,25% rms

Equalization: Correct equalization for playback of tapes recorded to NAB curve

Frequency Response: 30 to 16,000 Hz (±3 dB)

Distortion: less than 2% (1000 Hz "0" VU)

Output Power:

Total Music Power : 40 W (10 W each channel) at 8 Ω

Continuous Power : 28 W (7 W each channel) at 8 Ω

Signal-to-Noise Ratio: better than 47 dB

Erase Ratio: better than 60 dB

Bias Frequency: 60 kHz

Heads:

Rec/Playback : 8-track, 4-channel stereo head

Erase : 8-track, 4-channel erase head

Motor: 2-speed induction motor

Fast Forward Time: 4-channel stereo, 230 seconds using a 300 ft cartridge tape (approx. 15 ips)

Recording Capacity: 30/60 min. 4-ch/2-ch stereo using a 300 ft cartridge tape

Output Jacks

Line (4) : 1,23 V("0" VU) / 100 Ω

Speaker (4) : 10 W / 8 Ω

Phone (1) : 30 mV / 8 Ω

Input Jacks:

Mic (4) : 0,5 mV/5 k Ω

Line (4) : 50 mV/150 k Ω

DIN Jacks: 2 Input/Output DIN jacks: 0,4 V/10 mV (front/rear channels)

Semiconductors: 19 Transistors; 19 Diodes

Integrated Circuits: 4 Linear IC; 4 Power IC

Power Requirements: 120 V 60 Hz

Power Consumption: 75 W

Dimensions (W x H x D): 485 x 138 x 280 mm (19,4" x 5,5" x 11,2")

Weight: 12 kg (26 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)

Revox C115 cassette tape deck

Cassette Tape Deck - Professional Series

System

Tape transport

Dual capstan transport, 3-head system

Auto tape type

Automatic setting for IEC type I, II, IV

HX-Pro

Permanently active headroom extension to increase the overall dynamic range

Ease of use - minimum of training and familiarization required

Balanced arrangement of operating and control elements

Large display with high contrast lettering

Feedback for each key depression on the high contrast display and LED's

Fader start mode interlocks the keyboard

Ergonomic design - characterized by the attractive, classic and discreet design, even professionals under stress will feel comfortable with the Revox C115 Cassette Tape Deck

Large and clearly separated controls for all functions

Functional clarity minimizes operating errors

The power switch, often dreaded by professionals, has been arranged on the rear panel

Useful features and optionas - help to customize the unit and supply the professinal with a reliable tool

Different studio levels externally switchable

De-energized capstan motor in standby

Bias and calibration easily adjustable on front panel

Standardized interfaces for audio and fader control

Simple and quick access to moduls minimizes service time

Rackmount kit optional

Specifications

Transport: Dual capstan tape transport with controlled spooling drive. Separate head system for record and playback; ferrite erase head

Tape Speed: 1-7/8 ips ±0,5%

Tape Slip: <0,3%

Wow and Flutter (weight as per JIS): <0,1% (C-60 and C-90 in playback mode)

Spooling Time: approx. 95 sec for C-60 cassette

Tape Timer: switchable between, min/sec , linear counter, 4 digits

Automatic Tape Type Changover: for typ[es I, II and IV

Recording System: HX-Pro Headroom Extension

Calibration Aid: Rotary controls for Bias and Level via bargraph display

Noise Reduction System: Dolby B and C type, Double Dolby System for source/tape monitoring

Reproduce Equalization:

Type I : 3180 +120 µs

Type II : 3180 + 70 µs

Type IV : 3180 + 70 µs

Frequency Response (via Tape, -20 dB Dolby NR =Off)

Type I : 30 Hz - 18 kHz ±3 dB

Type II : 30 Hz - 17 kHz ±3 dB

Type IV : 30 Hz - 17 kHz ±3 dB

Level Calibration: 200 nWb/m =0 dB = Dolby-level

Harmonic Distortion (k3 of 333 Hz at 200 nWb/m)

Type I : <1,0%

Type II : <1,5%

Type IV : <1,5%

Signal-to-Noise Ratio (ref.to 3% distortion and Dolby C)

Type I : >72 dB

Type II : >72 dB

Type IV : >73 dB

Channel Separation: better than -40 dB at 1 kHz

Bias/Erase Frequency: 105 kHz

Erase Efficiency: >65 dB at 1 kHz (Dolby C =on)

Input Sensitivity/Impedance: 70 mV for 200 nWb/m / >10 k Ω

Max. Input Level: 10 V

Outputs (rel. To 200 nWb/m)

Line Out : -10/0/+6 dBm, R=50 Ω

Phones : max. 500 mV, R=100 Ω

4special Function: Faderstart, to be activated via 6-pole socket (DIN 45 322)

Power Requirements: 115 V, 90 - 130 V, (230 V, 190 - 260 V) 50/60 Hz

Power Consumption: 30 W

Dimensions (W x H x D): 440 x 143 x 366 mm

Weigth: 7,5 kg

Akai X-1800SD reel/cartridge recorder

Akai Cross-Field Reel-to-reel and Cartrdidge Stereo 8 Recorder

Your dream of cartridge recording and playback or Reel-to-Reel recording and playback with the same recorder has come true. This is possible with Akai's X-1800SD, a novelty in the tape recorder world. Akai has combined in one tape recorder all the features that could beattained by using three conventional interconnected recorders.

Cartridge 8-track stereo recording and playback, with an one micron gap head; Reel-to-Reel 4-track Stereo/Monaural recording and playback, with the Cross-Field head of superior recording capacity; and transfer from rell to cartrdige are unique and exclusive features of this model.

Outstanding Features

Reel-to-Reel

4-track stereo/monaural recording and playback

Tape speeds; 1-7/8; 3-3/4 and 7-1/2 ips (15 ips with 15ips adaptor kit)

Heads; Cross-Field head system (Erase, Recording/Playback and Nias heads)

Wide Cross-Field Frequency Response

Two lever system ensures dependable and durable operation

Track selector for simple selection between stereo and monaural

Automatic shut-off and Instant Stopcontrol

3-digit index counter with reset button

Tape cleaner with release button

Tape lifter in fast forward and rewind operation

Cartridge

8-track stereo recording and playback

Transfer fom reel to Cartridge

Transfer safety lock

Tape speed 3-3/4 ips

Heads, Erase and one micron gap recording/playback heads

Cartridge program selector button

Program selection may be remote controlled

Program indicator lamp (also indicates whether cartridge is perfectly set)

One hour of continuous stereo recording and playback

300 foot cartridge tape

Cartridge automatic stop

Reel-to-Reel/Cartridge

Hi-fi stereo sound produced by high capacity 12 W solid stste amplifier and high compliance self-contained speakers

Silicon transistors and shield type head for high Signal-to-Noise ratio

Strudy mechanism for absolute duraability

Main amplifier protector fuse

Tone controls

Tape speed equalizer high visable twin type VU meter

Speaker On/off switch

DIN jack, Stereo headphone jack

Fine oil-finished wooden cabinet

Vertical and horizontal operation

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

Cross-Field Head

On conventional recorders the signal and biass are applied to the same recording head. Therefore the frequencies recorded, especially the high frequency component of the recorded signal tend to be attenuated or erased by the effect of this bias field. On the exclusive Akai Cross-Filed head which was developed by Akai for practical use the signal and bias heads are mounted in opposition with their centres slightly off. As the recorded signal is entirely unaffacted by the prevailing effect of the bias fielf, the tape can be recorded over the entire frequency spectrum with maximum fidelity.

One Micron Gap head

Model X-1800SD utilizes the cross-field head to obtain an amazing level of recording characteristics in reel-to-reel recording. In cartridge recording, the high-quality one micron gap head designed by Akai also gives excellent recording characteristics. This recording characteristic, 50 to 17,000 Hz ±3 dB at a tape speed of 3-3/4 ips, produces excellent results for cartridge tape recordings.

8-track stereo recording/playback (cartridge)

Model X-1800SD employs the 8 track stereo system on the cartridge. The tape has a total of eight tracks, two of which are used at a time for stereo recording or playback. These are four choices of channels for stereo recording and playback. When the tape ends, the next channel is automatically positioned for recording or playback. Recording or playback time for one channel is fifteen minutes, and continous one hour on four channels by using 300 foot cartridge tape. The desired channel may be easily selected by manually pushing the Cartridge program Selector Button.

Cartridge recording tape (ACT-200, ACT-300)

Akai's 1800 series tape recorders, Model 1800L and X-1800SD are the latest models that are capable of recording with a cartridge tape. For use in this type of recording, we have cartridge recording tapes, ACT-200 with 200 foot long tape, and ACT-300 with 300 foot long tape. This cartridge tapes are highly recommended for best results.