QUALITON A75. Class A integrated tube amplifier with an output power of 2 x 75W.

The unit can be connected to speakers of nominal impedance of 4 Ω and 8 Ω.

The power outputs, based on KT 120(Kt150.KT170) type output pentodes, were adjusted to the above-mentioned rated loads through precision-wound output transformers manufactured in-house.

The bias control circuit also plays an important role in the operation of the output power. This circuit monitors the quiescent current of the output tubes and adjusts it to a preset value. Therefore, all four output tubes are aligned so that they operate perfectly the same.

Of the three unbalanced and one balanced inputs, the desired one can be chosen with the front panel volume control and input selector. The balanced input has an XLR connector. Also in this case, the entire volume control unit and input selector is in total harmony with the polished and shiny housing of the device, which combines functionality and aesthetics perfectly.

The minimalist remote control was designed with this philosophy: unique exterior design and aesthetics were always kept in mind and ease of use was enhanced.

Finally, a couple of words on the set of tubes used: the audio signal that reaches the selected input of the device is received by Tungsram ECC83-type tubes. The driving voltage, as well as its matching, are produced by E88CC / ​​​​6922s. At the power output, the aforementioned KT 120 output pentodes are in action, strictly in Class-A.

Warranty: 2 years

Technical characteristics:

Rated output power: 2 x 75 W, stereo

Total harmonic distortion: < 0.1% (f = 1 kHz, rated output)

Frequency response: 25 Hz to 70 kHz (-3 dB, rated output)

Input sensitivity, Balanced Stereo IN: 920 mV, to rated output

Input sensitivity, Unbalanced Stereo IN: 920 mV, to rated output

Number of input ports / channel 3 unbalanced Stereo IN, 1 balanced Stereo IN

Number of output ports / channel: 2 unbalanced Power OUT

Gain +28.5 dB (RL = 8 Ohms)

Input impedance, Balanced Stereo IN: 40 kOhms

Input impedance, Unbalanced Stereo IN: 10 kOhms

Load impedance: 4 Ohm and 8 Ohm

Signal-to-noise ratio: > 100 dB (RL = 8 Ohm, rated output)

Power requirements: 620 W

Tubes required: 4 x KT120 (KT150 or KT170 optionally); 4x12AT7; 2x12AX7

Weight: 21kg

Dimensions: 35 x 42 x 22 cm