Technics SE-A3000 Ver.3.0

Commentary

Improved stereo power amplifier based on SE-A3000.

A MOS class AA circuit using a MOS FET is mounted in the amplifying element of the class AA circuit.
Class AA aa circuit, voltage amplification and current supply are performed by separate amplifiers, and all current to the speakers is supplied by the current supply amplifier due to the Class AA Bridge effect, so that the voltage controlled amplifier operates in an ideal full class A operation with an output of 0 and exhibits excellent device characteristics.
In the MOS Class AA circuit, a MOS FET with high input impedance and excellent linearity is adopted for the class A operation voltage control amplifier to obtain a low distortion factor. In addition, a bipolar transistor with low loss and high power operation is adopted for the current supply amplifier to improve the speaker drive power with a strong current supply.

We have adopted TAKE II Ver. 3.0 electrolytic capacitors for smoothing power supply.
This capacitor is an upgraded version of an electrolytic capacitor using a bamboo mixing separator. Mechanical and electrical characteristics have been greatly improved by improving aluminum foil and electrolyte. In addition, a spiral coil is attached to the outside of the aluminum case to improve high-frequency characteristics and improve sound quality through trial listening, thereby suppressing the sense of distortion of sound.

By adopting a high-rigidity chassis, large insulator, and side wood with a real wood mirror finish, the vibration isolation effect is improved.

The power supply and power amplifier block are composed of two monaural amplifiers, and the left and right are independent twin monaural configuration is adopted.

Equipped with a high-precision large peak power meter that can directly read from 0.001W to 300W.
This power meter is equipped with a light ON/OFF switch.

Two input terminals, Direct and Normal, are installed.
The left and right independent level volume is equipped on the Normal terminal.

Equipped with XLR canon input terminal for balance input.

OCC wire is used for internal wiring.

3P-2P type detachable power cord is used.

Model Rating

Type	Stereo power amplifier
Rated output	140W + 140W (4 Ω, 20 Hz to 20 kHz, 0.02%) 120W + 120W (6 ω, 20 Hz-20 kHz, 0.015%) 100W + 100W (8 Ω, 20 Hz to 20 kHz, 0.01%)
Frequency characteristic	20 Hz ~ 20 kHz + 0 -0.2 dB 0.8 Hz ~ 150 kHz + 0 -3dB
Signal-to-noise ratio	108dB(JEITA) 129dB(IHF'66)
Input Sensitivity / Impedance	Unbalanced : 2V/10k Ω Balanced : 2.2V/20k Ω
Meter indication range	0.001W ~ 300W (8 Ω)
Pwer	100 VAC, 50Hz/60Hz
Power consumption	248W
External dimensions	Width 483x Height 186x Depth 431 mm
Weight	25.6kg