A high class handcrafted integrated vacuum tube amplifier by Audio Hungary in beautiful INOX look. 2 x 50 W with KT120 tubes. Designed for 4 Ω and 8 Ω speakers, featuring precision-wound output transformers and bias control circuitry for optimal tube performance. Offers three asymmetric and one symmetric inputs, a polished casing, and a remote control. Tube complement includes Tungsram ECC83 and E88CC/6922 for precise signal handling.
Slightly used but in excellent condition as seen in pictures!
After the premiere of Qualiton A20i in autumn 2015, in autumn 2016 Audio-Hungary Kft unveils another new premium category power amp. As the new flagship of the brand, the new integrated, vacuum tube stereo power amp, named Qualiton A50i, is expected to find a way right to heart of lovers of class A vacuum tube electronics. For this reason, it features just the right characteristics. Let’s have a look at them.
It is a Class-A integrated vacuum tube amplifier with an output power of 2 x 50 W. Comes with Standard KT120 tubes (there are options for KT150 or KT170).
The appliance can be connected to 4 Ω and 8 Ω nominal impedance speakers. The power outputs, based on output pentodes type KT 120, were tuned to the before-mentioned nominal loads through our in-house manufactured, precision winding output transformers. The bias control circuit plays an important role in the operation of the power output too. This curcuit monitors the quiescent current of the output tubes and adjusts it to a preset value. Thus, all four output tubes are in perfectly equal operation states. Out of three asymmetric and one symmetric inputs, one can choose the desired one using the front panel volume control and input selector rotary switch.
The symmetric input features a mini XLR connector. In this case too, the entire volume control and input selector unit is in full harmony with the shiny polished casing of the appliance, bringing together functionality and aesthetics perfectly.
The clearly arranged, minimalistic remote control was designed with this philosophy as well: the unique and aesthetical exterior design was always kept in mind and the usability was improved. Finally, a couple of words on the set of tubes we use: the audio signal arriving on the selected input of the appliance is received by vacuum tubes type Tungsram ECC83.
The driving voltage as well as its matching are produced by E88CC/6922s. In power output, the before-mentioned output pentodes KT 120 are in action—strictly in Class-A.
Specifications
Name
Value
Rated output power
2 x 50 W, stereo
Total harmonic distortion
< 0.75% (f = 1 kHz, rated output power)
Frequency response
30 Hz – 100 kHz (-3 dB, rated output power)
Input sensitivity
425 mV, unbalanced input
Number of input ports
3 unbalanced input per channel, 1 balanced input per channel
Number of output ports
1 output terminal pair per channel, 1 line level output per channel
