It is the stereo power amplifier used as DA-P100 and a pair.
2 block configurations which prepare a voltage amplifier before an
electric power amplifier are adopted.
This has solved the problem of power
amplifier including S/N and distortion sharply with stable NFB.
The high thing of fa (high region cutoff frequency) with the
sufficient linearity of hFE (direct-current current gain) is selected carefully
and used for a power transistor. This has realized the power ratio 3.0.
Furthermore, the results of having excelled in sound quality, such as
reduction of notch distortion, have been obtained by using it by a single push
A power-source part is considered as a thing of a magnification
stage and one, is aiming at improvement in a quality of the part itself, and is
aiming at improvement in the whole.
The not a transformer but cut core of EI
structure with many losses are adopted as a power transformer. Moreover,
improvement in a regulation is aimed at by enlarging capacity with 400VA.
Moreover, in order to acquire the Oide power of the 4-ohm load 150W,
impedance has adopted as the filter capacitor of a power source enough what can
send large current low. The electrostatic capacity of 22000 micro F and the
current capacity 36A are carrying out thing adoption at the capacitor.
It is the design in which the protection circuit operates at radiator
(radiator) 100 degree C.
One power transistor is equipped with one
unusual detector circuit.
||Stereo power amplifier
|Both channel operation :
|One-side-channel operation :
|Music power :
||0.1% (at the time of an Output power)
|Cross modulation distortion
||0.15% (at the time of an Output power)
||20Hz - 20kHz
||10Hz - -30kHz 0.5dB
|The semiconductor used
||Transistor: 35 pieces
Diode: 25 pieces
||Width 360x height 223x depth of 268mm