Are you a true audiophile seeking the perfect blend of vintage charm and exceptional performance? Look no further! Up for sale is the Nakamichi 670ZX, a revered classic cassette deck that has been lovingly serviced by Nak Central Audiolabs and expertly optimized to deliver top-notch performance and aesthetics.

Key Features and Highlights:

Discreet 3 Heads Technology: The Nakamichi 670ZX boasts a unique Discreet 3 Heads configuration, ensuring superior playback and recording quality. Enjoy faithful audio reproduction and achieve professional-level recording results.

Expert Servicing by Nak Central Audiolabs: This deck has undergone meticulous servicing by Nakamichi specialists at Nak Central Audiolabs. They have a deep understanding of the intricacies of Nakamichi equipment, ensuring that this 670ZX is performing at its absolute best.

Optimized Performance: The deck has been fine-tuned and optimized to extract every ounce of performance from its components. Expect clean, precise sound with minimal signal loss and optimal signal-to-noise ratio.

Enhanced Cosmetics: In addition to its exceptional performance, this Nakamichi 670ZX has also received cosmetic attention. It flaunts a stunning appearance, reflecting the care put into its refurbishment.

Robust Build Quality: Nakamichi is renowned for its build quality, and the 670ZX is no exception. Solid construction and high-quality materials ensure this deck will stand the test of time.

Serial No 05108
UK 240vFull Service Including :
Mechanism replaced (donor: 680ZX)Master Record potentiometer replaced (donor: 680ZX)

Repairs:

§All Electrolytic Capacitors Power Supply replaced

§All Electrolytic Capacitors Audio Path replaced

§Old rubber belts replaced with new ones

§Oscillator / pre-magnetization repaired

§All operating voltages rectified, filtered and stabilized

§Playback head, Record head and Erase head, cleaned and demagnetized

§Tape path, cleaned and demagnetized

§All potentiometers cleaned

Mechanical adjustments

-Mechanism Control Cam Adjusted

oOffset Adjustment of Control Motor Driver

oOffset Fine Adjustment of Control Motor Drive

oPoint of Reference Voltage Adjusted

-Reference Voltage Adjusted:

oStop: 3.0 V/1.75 V

oFast (FF/REW): 1.3 V/1.75V

oPause: -2.8 V/1.6 V

oPlay: -5.4 V/ 2.6 V

-Cam Timing Adjusted

-Tape Speed Adjusted

oSpeed Adjusted

-Record Head and Playback Head Tilt Adjusted

-Head Base Stroke in Play and Cue Modes Adjusted

-Head Base Stroke in Play Mode Adjusted

-Head Base in Cue Mode Adjusted

-Tape Guides and Erase Head Stroke Adjusted

oSupply Tape Guide Height Adjusted

oTake-up Tape Guide Height Adjusted

oErase Head Stroke Adjusted

-Erase Head Height and Tilt Adjusted

-Back Tension Adjusted

-Playback Head and Record Head Height Adjusted

oPlayback Head Height and Azimuth Alignment Adjusted

oRecord Head Height and Azimuth Alignment Adjusted

-Record Head Stroke Adjusted

-Tape Traveling Adjusted

-Flywheel Holder Adjusted

Electrical Adjustments Audio Alignments

-Tape Speed Adjusted: 3 kHz and Wow and Flutter Tapes:

oSpeed (1-7/8 ips): 3 kHz

-Tone Calibration Adjusted: 400 Hz Test Tone: 1.0 V (0 dB) Output, both channels Left & Right

-FL Indicator Level and Dynamic Range Adjusted:

o25.6 kHz clock oscillation frequency on the Frequency Counter

o0 dB FL level Input

o- 20 dB input signal, obtained -20 dB on FL

-MPX Filter Adjusted: 1 V at MPX ON, -20 dB

-Playback Head Track Aligned (1 kHz Track Alignment)

-Playback Head Azimuth Aligned (15 kHz Azimuth)

-Playback Level Calibrated (400 Hz Level Tape)

-Playback Frequency Response Standard Speed Adjusted (10 kHz, 15 kHz, 20 kHz)

-Playback Frequency Response Half Speed Adjusted (10 kHz, 15 kHz, 20 kHz)

-Bias Oscillation Frequency and Erase Current Adjusted: 105 kHz

-Bias Trap Adjusted (Record Amplifier)

-Record Head Height Adjusted (400 Hz @ 0dB)

-Record Head Azimuth Aligned (15 kHz @ -20dB)

-Bias Trap Adjusted (Playback Amplifier)

-Record Level Calibrated

-Recording Bias Current Adjusted (400 Hz @ 0 dB, 20 kHz @ -20 dB and 10 kHz / 20 kHz @ -20 dB)

-Overall Frequency Response Adjusted (400 Hz @ 0dB and 20 Hz to 20 kHz @ -20 dB)

-Record Head Height Adjusted and Azimuth Aligned

-Record Head Azimuth Phase Adjusted

-Record Level Calibrated and Record Bias Current Adjusted

-Overall Frequency Response at Tape Speed 1-7/8 ips Adjusted

-Crosstalk Adjusted

-Channel Separation Adjusted

-Erasure Adjusted

-Signal to Noise Ratio Adjusted

-Total Harmonic Distortion Adjusted

Specifications:

Connectivity

Headphones

RCA Input/output Connectors

Wired Remote Control

Din DC Power Output For Backbox Series

Head Configuration

3 Head Design

Separate Record and Playback Heads

4 Track / 2 Channel

Noise Reduction

Dolby-B Noise Reduction

Double Dolby NR Circuits

MPX Filter

Calibration

400Hz Test Tone

Auto Azimuth Calibration

Manual Level Calibration

Preamplifier

Output-Level Control

Individual Input Level Controls

Master Record Level Control

Display

3-Digit Mechanical Counter

Analog Needle Meters

Track Indicator

Operation

Timer Recording/Playback

Memory Stop

Pitch Control

Real-Time Tape Monitoring

Record Mute

Full Logic Transport Control

Music Scan

2-Speed Cueing

Damped Eject

Removable Well Cover

Transport

Pressure Pad Lifter

Dual-Capstan Transport

Slack-Tape Take-up

Belt Drive (Capstan)

Mechanical Tape Loading

Auto Shutoff

Multi Motor Mechanism

Idler Drive (Reel)

Belt Drive (Mechanism)

Belt Drive (Azimuth Adjustment)

Exterior

19-Inch EIA Rack Mounting

Front Loading

Orientation Left

Black Finish

Tape

2-Position Equalization Selector

Chrome Tape Capability

Normal Tape Capability

Metal Tape Capability

Manual Tape Type Selection

Indicators

Illuminated Cassette Compartment

Electronics

Double NF Record And Play Amplifiers

General

Stereo

Speed

1⅞ ips – 4.76 cm/s

Type: 3-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 1⅞ ips (4.76 cm/s)

Heads: 1 x record, 1 x playback, 1 x erase

Motor: 2 x reel, 1 x capstan

Noise Reduction: B, C, and DBX

Frequency Response (with DBX): 20Hz to 22kHz (±3dB)

Signal-to-Noise Ratio: 76dB (DBX)

Wow and Flutter: 0.04% WRMS

Total Harmonic Distortion: 1% (DBX)

Input: 60mV (line), 0.25mV (mic)

Output: 0.5V (line)

Dimensions: 17.2 x 5.3 x 11.2 inches (437 x 134 x 285 mm)

Weight: 11 kg

Condition:

This Nakamichi 670ZX is in excellent condition, both functionally and cosmetically. It has been carefully serviced and optimized to meet Nakamichi’s high standards, making it an exceptional addition to any audiophile’s collection.

Please Note:

This auction includes the Nakamichi 670ZX Discreet 3 Heads Cassette Deck and its power cable.

As a vintage item, it may show minor signs of wear, but nothing that affects its performance or beauty.

Unleash the full potential of your cassette tapes with the Nakamichi 670ZX. Buy now and experience the joy of owning an expertly serviced and optimised piece of audio history!
Feel free to reach out if you have any questions or need more information.

Disclaimer: The above specifications are based on manufacturer data at the time of production. Please note that performance may vary slightly due to the age and nature of vintage electronics.