The APX200 from Audio Hungary is an excellent balanced tube stereo amplifier with a power of 100 W per channel. This is the MKII version which has an autobias circuit and uses a quartet of KT90 tubes. The bias selector on the front panel is used to check if one of the power tubes is defective.

The APX200 has a direct input, both single-ended and balanced, and an input that is routed via its volume control, enabling the APX200 to be used as one input integrated amplifier.

This amp has been supplied by the official Dutch distributor and has only been used for demo purposes. It comes with the original manual and box. Newprice: 4.000 euro (pricelist is available), now for 1.990 euro.

Specs:
Nominal output power: 2 X 100 W, stereo
Total harmonic distortion: < 1 % (measured by 1 kHz sine wave - nominal output power) Frequency response: 15 Hz - 100 kHz (-3 dB - nominal output power) Input sensitivity (LINE1): 665 mV, asymmetrical Input sensitivity (LINE2, DIRECT INPUT!): 665 mV, symmetrical, 1330mV, asymmetrical Gain (from LINE 1): 32,5 dB (8 Ω) ; 29,5 dB (4 Ω) Input impedance (LINE1): 10 kΩ Nominal load impedance: 4 Ω; 8 Ω Signal-to-Noise ratio: > 101 dB
Power consumption: 150W (quiescent) and 640W (maximum)
Vacuum tube set: 4 x KT90; 2 x 6922; 2 x 12AX7
Weight: 29,6 kg