Pioneer - A-8800X Solid state integrated amplifier

A Rare Pioneer amplifier, model A-8800x. As shown in the photos, the amplifier is in beautiful condition, only a few scratches. Technically fully inspected! Plays magnificently.

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 each circuit, so there is no cable routing, which greatly reduces impedance. In addition, interference between amplifier units can be prevented, resulting in improved sound quality.

In addition to the large transformer, the power supply section has two power supply capacitors on the left and right side 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 マグニワイドアンプ 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 MC position where 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.

Subject to a Japanese import model, so 100v.

Type Stereo pre-main amplifier
Effective output (15 Hz to 20 kHz) 75W + 75W (8 Ω, both channel drive)
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 ~ 50 kHz (Both channel drive, 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 μ V/100 Ω
Tuner, Aux, Tape play1, 2 : 150mV/50k Ω
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 play1, 2 : 10 Hz to 100 kHz + 0 -2dB
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 420x Height 150x Depth 369 mm
Weight 11.6kg