Qualiton A50i

About the Qualiton A50i

The Audio Hungary Qualiton A50i is a high-end, Class-A integrated vacuum tube amplifier designed to deliver exceptional audio quality. It features a power output of 50 watts per channel into 8Ω loads, making it suitable for speakers with nominal impedances of 4Ω and 8Ω. The amplifier uses a combination of tubes, including two Tungsram ECC83 tubes for the input stage, four E88CC tubes for voltage amplification, and four KT120 pentodes for power output. The KT120 tubes can be upgraded to KT150 or KT170 for different performance characteristics. The A50i includes four analog audio inputs: three unbalanced RCA and one balanced mini XLR, with a set of mini to full-sized XLR patch cables provided for easy connection to balanced sources. The amplifier also features an auto-bias system to simplify tube maintenance by monitoring and adjusting the output current of the KT120 tubes. The unit is crafted with a stunning stainless steel casing, ensuring both aesthetic appeal and durability. Key specifications include a frequency response of 30Hz to 100kHz, total harmonic distortion of 0.75%, and a signal-to-noise ratio of 90dB. The amplifier weighs 25kg and includes a remote control for convenience.