Audio Database

W-25
Commentary

A stereo tri-amplifier that combines a 10W stereo amplifier with an AM/SW tuner.

It supports monaural / stereo AM broadcasting, monaural / stereo recording and shortwave broadcasting.

You can adjust the sound by adjusting the volume of 2 pairs of amplifiers with the clutch type knob.
It is also possible to adjust the left and right separately.

Pickup is compatible with small output magnetic pickup and crystal pickup.

Equipped with an external input terminal, FM tuner and tape recorder can be connected.

It can be attached to wooden cabinet or furniture by removing the case.

Model Rating
Type AM-AM/SW Stereo Tri-Amplifier
Receiving frequency AM : 535 kHz to 1605 kHz (2 channels)
SW : 3.7 mhz to 11 mhz
Output 10W + 10W maximum
8W + 8W (unstrained)
Pick-up Magnetic / Crystal Dual Use
Tone control Bass : + 12 to -17dB at 50 Hz
Treble : + 17 to -14dB at 10 kHz
Loudness control (Vol-30dB) + 12 dB at 50 Hz, + 11 dB at 10 kHz
Equalizer RIAA
Residual noise 50mV(MAG)
5mV(Aux)
Tuning instruction Two tuning indicators
Vacuum tube used Total 14 balls, 2 koku
6BE6x2
6BD6x2
6AQ8
12AX7x2
6BM8x4
6ME5x2
5AR4
OA79x2
Power supply voltage 100 VAC / 117 V, 50Hz/60Hz
Power consumption 125VA
External dimensions Width 436x Height 132x Depth 300 mm
Weight 11kg(24.21lbs)