Pioneer - A-8800x & JA-C80 Audio amplifier

Rare Pioneer amplifier, model A-8800x. Complete with the original, optional wooden case, model JA-C80, including the original packaging. As seen in the photos, both the amplifier and the wooden case are in superb condition. Fully inspected technically. Plays magnificently.

It is a Japanese import model, so 100V.

Stereo pre-main amplifier with direct power supply.

The direct power supply system consists of a small-signal circuit board (equalizer amplifier, flat amplifier) and a large-signal circuit board (power amplifier), each equipped with a dedicated power supply. As a result, each power supply is directly connected to its respective circuit, eliminating cable routing and significantly reducing impedance. Additionally, interference between amplifier units can be prevented, leading to improved sound quality.

In addition to the large transformer, the power supply section has two power supply capacitors on the left and right sides in parallel to keep the impedance of the capacitors low.

The A-8800X uses a newly developed Super Linear RET (Ring Emitter Transistor).
This is a group transistor with excellent high-frequency switching characteristics developed in the power amplifier M-25 and also used in the MagniWide Amplifier A-0012. It greatly improves linearity at the effective output.
In addition, a newly developed T-shaped Skype fin is used for the radiator, increasing the heat radiation effect by more than 50%.

Equipped with an MC position where an MC cartridge can be directly connected; MM/MC can be selected by switching the switch on the front panel.

The Phono input uses cascode / current mirror connection and FET differential input circuit.
The flat amplifier section uses a newly developed CAN-type low-noise dual FET differential 2-stage circuit.


Stereo pre-main amplifier
Effective output (15 Hz to 20 kHz): 75W + 75W (8 Ω, both channels driven)
Harmonic distortion factor (8 Ω) 0.03% (at effective output)
0.01% (at 37.5W output)
0.01% (at 1W output)
Cross modulation distortion factor
(50 Hz : 7 kHz = 4 : 1, 8 Ω) 0.03% (at effective output)
0.01% (at 37.5W output)
0.01% (at 1W output)
Output bandwidth: 5 Hz to 50 kHz (both channels driven, THD 0.03%)
Output terminal Speaker, Headset, Tape rec1, 2 (150 mv)
Damping factor 40 (15 Hz ~ 20 kHz, 8 Ω)
Input Sensitivity / Impedance: Phono MM: 2.5mV / 25k Ω, 50k Ω, 100k Ω
Load capacity 100 pF, 200 pF, 300 pF.
Phono MC: 250 μV/100 Ω
Tuner, Aux, Tape play 1, 2: 150mV/50kΩ
Phono maximum allowable input
(1 kHz, 0.02% THD) MM: 200mV
MC: 20mV
Frequency characteristic: Phono MM: 20 Hz to 20 kHz ± 0.2 dB.
Tuner, Aux, Tape play 1, 2: 10 Hz to 100 kHz + 0 - 2 dB
Signal-to-noise ratio (IHF, A-network)
Short circuit) Phono MM: 89dB
Phono MC: 72dB
Tuner, Aux, Tape play: 110 dB
Tone control Bass: ± 10 dB (100 Hz)
Treble: ± 10 dB (10 kHz)
Filter Low: 15 Hz, 6dB/oct.
Loudness contour
(at Volume -40dB) Low: +6dB (100Hz)
High: +3dB (10kHz)
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 180W (Electrical Appliance and Material Control Law)
External dimensions: Width 420 mm x Height 150 mm x Depth 369 mm.
Weight 11.6kg
Sold separately: Wood Cabinet JA-C80 (¥5,500)