Accuphase DP-80 (1986)

CD transport released in July 1986 as Accuphase’s first CD player, paired with the DC-81 digital processor.

Overview

The Accuphase DP-80 is a CD-dedicated digital signal reproducer, which is to say a CD transport. Accuphase Laboratory Inc. released it in July 1986. It was the company’s first CD player, and it was designed to work with the DC-81 digital processor. The optical reading system is non-contact, using a GaAlAs semiconductor laser with a 660 nm emission wavelength and a KSS190 laser assembly. It plays 3" discs. Digital audio leaves through two optical outputs and one 75 Ω coaxial output, conforming to EIA and EIAJ standards.

Specifications

Production Year	Released in July 1986
Original Price	¥260,000
Dimensions	475 mm (W) × 135 mm (H, including legs) × 373 mm (D)
Weight	15.0 kg
Power Consumption	15W
Power Supply	AC100V/117V/220V/240V, 50Hz/60Hz
Rotation Speed	500 ~ 200 rpm (CLV)
Reading Speed	1.2 to 1.4 m/s, constant
Channels	2 channels
Error Correction	CIRC
Laser Type	GaAlAs (double hetero diode)
Optical Output	-21 to -15 dBm (EIAJ)
Coaxial Output	0.5 Vp-p / 75 Ω
Digital Output Format	Digital Audio Interface (EIA compliant)
Optical Transmission Capacity	10 Mbit/sec
Remote Control	Infrared pulse system, RC-1 commander with 2× R6 (SUM-3) batteries
Remote Dimensions	64 mm × 149 mm × 18 mm
Remote Weight	115 g (including batteries)
Semiconductors	Transistors: 22, ICs: 27, Diodes: 34

Design

A master clock system controls all operations, so there is no beat interference from multiple oscillators. The mechanism sits on a high-rigidity base of ceramic-mixed special resin. It is floated from both the chassis and the disc table to isolate vibration. It is also secured on a die-cast aluminum frame and reinforced with a solid structure to prevent resonance. The pickup moves on a linear motor for fast, smooth operation. Two 8-bit microprocessors handle mechanism control and display/key functions. The digital outputs are two optical fiber terminals (EIAJ standard) and a 75 Ω coaxial output, with optical isolation to keep noise from transferring. A full line filter reduces power-line noise. Inside are a large toroidal transformer, a single main PCB for control and data extraction, and Sony LSIs for servo and digital processing. The exterior has gold-style hairline panels and natural persimmon wood sideboards.

Context

The DP-80 was Accuphase’s first CD player, and it marked the brand’s entry into digital audio. It was developed as a pair with the DC-81 digital processor, and together they formed a high-end digital playback system. Accuphase was founded in late 1972 by former Kenwood engineer Jiro Kasuga. It had built amplifiers and tuners up to this point.

Market

Common failures include IC CX23035 malfunction, KSS-190A laser head failure, servo control issues, and degraded lubrication that causes gear jams. Repairs call for circuit realignment, proper bearing lubrication (oil-based preferred), and servo system calibration. A used DP-80L and DC-81L combination was listed for €2,950 on March 26, 2026.