¥ 165,000 (around 1985)
A stereo power amplifier that realizes high power in a compact case.
Its unique magnetic field technology delivers high power in a compact size, and it can also be used as a high-power monaural power amplifier with bridge support.
In conventional power amplifiers, a large amount of power is always stored in a capacitor in order to follow a large instantaneous input, so the power supply circuit tends to become large and costly. To solve this problem, a magnetic field amplifier is equipped with a monitor circuit that detects the waveform (amplitude) of an input signal, and two characteristic circuits that follow the input signal and switch control the power supply circuit at high speed. These two circuits switch to a small amount of power when a weak input signal is input, and switch to a large amount of power instantaneously when a large amplitude waveform is input. In reality, the amplitude of an audio input signal is modulated and the power side can be controlled precisely and stepwise. Therefore, the power supply has a waveform close to the waveform of the input signal that supplies the necessary amount of energy when necessary. This results in an extremely high-efficiency amplifier with little heat generation.
The magnetic field coil, which is the heart of the power supply, is directly connected to the AC line power supply so that there is no power shortage even at high peak average.
A protected circuit is installed to prevent damage to the speakers.
|Type||Stereo power amplifier|
|Output||110W + 110W (8 Ω, 20 Hz ~ 20 kHz, THD0.15% or less)
300W (8 Ω monaural, bridge operation)
|Clipping Power||130W/ch (8 Ω, 1 kHz)
200W/ch (4 Ω, 1 kHz)
350W (8 Ω monaural, bridge operation, 1 kHz)
|Signal-to-noise ratio||100 dB or More (IHF-A)|
|Frequency characteristic||1 Hz ~ 80 kHz + 0 -3dB (1W)|
|Total harmonic distortion factor||0.15% or Less (IHF-A)|
|Cross modulation distortion factor||0.15% or Less (SMPTE)|
|TIM Distortion||0.01% or less|
|External dimensions||Width 483x Height 89x Depth 254 mm|