Audio Database


319,400yen(October, 1985 release)

Power amplifier of a tube.

In order to make the charm and the its stuff of a thermionic-tube no one but show fully, an operation in a Class-A area is carried out.
The auto-bias scheme is adopted in MQ-360.

Twin-Triode 6CG7 from which a drive electrical power is obtained by a low impedance is adopted as the driver circuitry which drives the power stage, and it is made to carry out a generous operation in a whole page push pull stream composition.

While securing a regulation high also at the time of an overcurrent by carrying a mass transformer in a power source, careful consideration is carried out also to the polar mandatory.
Moreover, the exclusive transformer of the optimal ultra linear interconnection for an auto-bias circuitry is adopted as an output transformer, and the high region property and distortion which were smoothly extended to 100kHz have realized the tone quality of a tube no one but.

The S.T.A.R. circuit of the view which is not made to interfere in each circuitry block is adopted.

Rating of a mode
Form Tube power amplifier
Valves employed 6550Ax4
Effective output 40W+40W (8 ohms, 1kHz, both channel simultaneous operation)
THD 0.2% or less (1kHz, 1W)
2.0% or less (1kHz, 40W)
Frequency characteristic 10Hz - 30000Hz - less than (1W) 1dB
Input sensitivity/impedance 1.1V/100kohm
SN ratio (IHF-A correction) 100dB or more
Attachment Input level set (right-and-left interlock type)
Line phase sensor
Supply voltage AC100V, 50Hz/60Hz
Power consumption 290W (Electrical Appliance and Material Control Law)
Dimensions Width 434x height 176x depth of 252mm
Weight 19kg