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Akai 4000DS Mk-II

Akai 4000DS Mk-II
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Akai 4000DS Mk-II Specifications

General IconGeneral
TypeReel to Reel
Track System4-track, 2-channel, stereo/monaural system
Signal to Noise Ratio50dB
Reel SizeUp to 7 inch reel
Total Harmonic Distortion1.5%
Output0.775V (line)
Tape Speed3.75 & 7.5 ips
Heads1 x erase
Input Sensitivity50mV (line)
Semiconductors6 x Transistors
InputsLine
OutputsLine

Summary

Akai 4000 DS Specifications Overview

Tape Transport Performance Specifications

Details tape speed, wow/flutter, and rewind times for optimal tape handling.

Audio Performance Specifications

Covers frequency response, SNR, distortion, crosstalk, and erase ratio for audio quality.

Electrical and Component Specifications

Lists input/output levels, bias, components, power, and physical dimensions.

Measuring Method Procedures

Measuring Tape Speed, WowFlutter, Frequency Response, and SNR

Describes measurement procedures for key performance parameters like speed and audio quality.

Measuring Distortion, Crosstalk, and Erase Ratio

Details methods for evaluating audio quality and erase performance.

Tape Transport and Amplifier Dismantling

Step-by-Step Disassembly Guide

Provides visual instructions for taking apart the tape transport unit and amplifiers.

Mechanism Adjustment Procedures

Pinch Wheel and Supply Reel Shaft Adjustments

Covers critical tension and alignment settings for tape handling mechanisms.

Take-Up Reel Shaft and RecordingPlayback Mechanism Adjustments

Details adjustments for tape tension and recording/playback mode switching.

Head Adjustment Procedures

Head Alignment, Slant, and Height Adjustments

Explains precise alignment for optimal audio reproduction and tape path.

Amplifier Adjustment Procedures

Playback and Recording Level Calibration

Details setting audio input and output levels for accurate performance.

Bias and Erase Voltage Calibration

Covers critical settings for recording bias and erase head voltage.

Component Layout Views

Pre-Amplifier P.C. Board Component Layout

Illustrates component placement on the Pre-Amplifier P.C. Board (LE-5022).

Oscillator and Power P.C. Board Component Layout

Shows component placement on the Oscillator & Power P.C. Board (LE-5021).

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