QUALITON A20i

QUALITON A20i

Stereo, Class-A integrated amplifier featuring push-pull circuitry. The rated power output of the appliance is 20 W at the most, each side. The outputs at the rear panel can be connected to 8 Ω nominal impedance speakers. The design of the output transformers of the power amp enable to connect the amp with 4 Ω nominal impedance speakers as well. This entails a slight deviation from the parameters indicated in the technical data sheet.

At the front panel, the volume control potentiometer and the input selector rotary switch are connected to the same shaft. Indicators informing about the actual state of the amp are located at the front panel too. It can be monitored whether the appliance is ready for operation (if so, the LED next to the volume control turns from red to white light). The user is also informed about the actual position of the input selector unit. The amp is made of solid, 1.5 mm thick, polished stainless steel sheet.  

Warranty: 2 years

User's manual


  • technical parameters
    Name Value
    Rated output power 2 x 20 W, stereo
    Total harmonic distortion < 0.3% (f = 1 kHz, rated output power)
    Frequency response 25 Hz - 100 kHz (-3 dB, rated output power)
    Input sensitivity 230 mV, unbalanced input
    Number of input ports 3 unbalanced input per channel
    Number of output ports 1 output terminal pair per channel
    Gain +34.8 dB
    Input impedance 10 kOhm
    Nominal load impedance 8 Ohm
    Output polarity non-inverting
    Signal-to-noise ratio > 90 dB; output noise less, than 1 mV
    Power requirements 150 W
    Tubes required 4 x Tung-Sol 5881; 2 x Tesla E88CC; 2 x Tungsram ECC83
    Weight 16 kg
    Dimensions 27 x 18 x 30 cm

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CONTACT US

Should you have any question about our products or need any further information, please do not hesitate to contact us at one of the following contacts:  


Hungary, 4400, Nyíregyháza, Nádor street 28.​ 
Opening hours:
M-F 8:00-15:30
Call center opening hours: M-F 8:00-12:00
Phone: +36 42 446-688 
Fax: +36 42 446-688