.jpg "Technics SU-V7 (1981) | New Class A")
Based on the new class A amplifier technology developed for the SU-V10, this integrated amplifier further reduces distortion by installing linear feedback that reduces the distortion to a theoretical value of 0. In the SU-V7, the bandwidth of the independent feedback circuit is limited, and the feedback amount is gradually reduced as the frequency increases. With this configuration, a gain increase of about 20 dB is obtained at 100 kHz. Even in the ultra-high frequency range, the NFB is 10 times more stable than the conventional one, and the distortion is greatly reduced. The synchronous bias circuit developed by Technics, which is the foundation of New Class A, eliminates switching distortion caused by pause by supplying a constant bias current in synchronization with the pause cycle to output transistors that normally go into complete pause alternately in order to obtain high efficiency in class B and class AB, and keeping the output stage in the active state at all times. In addition, since the signal path and bias current path are independent, the output stage always keeps an appropriate operating point. Together with the function of a high-speed diode with dual characteristics, crossover distortion is eliminated. The power transformer is a resin-sealed power transformer with low vibration and low leakage flux and is equipped with a rush current prevention circuit to save peak current for a few seconds after power is turned on. The amplifier was available in both silver and black finish. The original sale price was 1.000 DM in Germany.
Technical Data:
Continuous power (at distortion factor)
8 Ohm: 2x 80 Watt (0.003 %)
4 Ohm: 2x 80 Watt (0.007 %)
Frequency response: 5 - 70,000 Hz (8 Ohm; 0.02 % THD)
Loudness: yes 50Hz +7dB
High Filter: 7 kHz -6 dB/oct.
Low Filter (Subsonic): 20 Hz -12 dB/oct.
Dimensions (WxHxD): 430 x 120 x 362 mm
Weight: 9.5 kg
.jpg "Technics SU-V7 (1981) | New Class A")
.jpg "Technics SU-V7 (1981) | New Class A")
