MUSMYS A-75 Pure Class A HiFi Power Amplifier 120W x2 Stereo Audio Amplifier Replacement for Accuphase A-75

Key Features:
- Pure A-class output, 120W 4Ω x 2 stereo.
- The output uses 12 field-effect power transistors per channel, which can drive impedance as low as 1Ω.
- The input adopts an exclusive self-developed fully balanced low-noise module, which can greatly broaden the frequency response of music, improve sound clarity and intensity.
- The voltage amplification part adopts two parallel connections to reduce input noise and improve dynamic range.
- Adopting direct current stabilization technology to ensure stable operation of the power amplifier.
- Incorporating mains power (220V) isolation technology to effectively isolate DC components from entering the transformer.

Description:
- A-75 includes an upgraded version of the "MCS + Circuit" primary slow charging amplifier circuit equipped with "MCS", an improved multi-level parallel circuit design, and a current feedback design to ensure linear response at each level. The amplification unit circuit is connected in parallel to reduce noise, and a DC stabilized power supply is installed in the driving section and MCS+ circuit to improve the SN ratio and purity of the sound. The high-efficiency large transformer is housed in a metal cover and equipped with a "super large pond" filtering group to provide sufficient and stable power supply. The amplifier section adopts a fully balanced amplification circuit design, with 12 high-power field-effect transistors used for amplification output per channel, achieving high-quality high driving force and providing true power amplification outputs of pure Class A 60Wx2 (8Ω), 120Wx2 (4Ω), 240Wx2 (2Ω), and 480Wx2 (1Ω). Provide powerful power output and super strong driving capability.

- A new fully balanced and split buffer amplifier has been developed, which effectively improves the signal-to-noise ratio and expands the dynamic range. The fully balanced amplification technology has the advantages of good symmetry, low distortion, high stability, and strong driving force compared to ordinary amplification technology. By adopting a fully balanced amplification circuit design, the performance of CMRR is greatly enhanced, and it has a high ability to suppress harmonic distortion. However, fully balanced amplification requires relatively strict matching of circuit components, and the number of components used will double, so it is mostly used in professional models or advanced fever equipment. And the real A75 input buffer is selected with -3-6-12dB switching, which can be matched with different front-end input impedance.

- A-75 looks exactly the same as the previous generation A-70, but in terms of specifications, the signal to noise ratio of the previous generation is 121dB, and that of A-75 is 122dB; the damping factor of the previous generation is 800, and that of A-75 is 1000.

Package Included:
- 1 x Power Amplifier