Audio Database


Accuphase B-6
25,000 yen(1978 release)

M-60, P-300S, the power bridge network developed by P-300 exclusive use.

Operational amplifier IC is used for a buffer circuit and a phase inversion circuit. Especially this IC is the thing excellent in the high region characteristic and S/N, and the necessity for phase compensation in a broadband of it is lost, and it is suppressing sound quality degradation.
Moreover, while direct-current-izing NF loop, an input and an output removing a capacitor and a coloration are removed.

There are notes in this bridge network.
It is the design of M-60/P-300 S/P-300 exclusive use.
When it is used with other Accuphase products etc., big distorted generating and an oscillation may be caused.

When speaker impedance is setting to 8ohms or more and impedance falls on specific frequency, if there is a point of 5ohms or less, distortion may be generated near the maximum except take-off.
Therefore, it recommends investigating the impedance characteristic of a speaker beforehand.


Rating of a mode
Form Power bridge network
Profit 0dB
Maximum except take-off 5.0V
THD 0.01% (at the time of 20Hz - 20kHz, and 5.0V output)
Frequency response 20Hz-20kHz+0 -0.2 dB
direct-current-600kHz+0 -1.0dB
Input impedance 100kohm
Output load impedance 100ohms
S/N 110dB (IHF-A, 20Hz - 20kHz, output 2.0 V:00)
Power supply voltage AC100V, 50Hz/60Hz
Power consumption 4W
Dimensions Width 184x height 77x depth of 197mm
Weight 2.0kg