Audio-GD Master 10 MK3

Master-10 MK3 is a true balanced design applying the newest ACSS design which can improved the XLR connection to sound as good as the ACSS connection. It seems complex, but in fact they are the most simple design the world has ever had, their a lot components to process the power supply. The Master-10 MK3 power amp only has a single "voltage" gain stage to process signals, but works in ACSS mode so in fact it is a current gain stage instead of voltage gain stage, whereas normal OPA chips already include two or three voltage gain stages. The simplest and shortest signal journey brings out the most neutral and least colored sound.

Master-10 MK3 applies ultra-low distortion single stage ACSS amplifier and soldered directly on the motherboard. The gain stages and pre-driver stages working on class A.

The output transistors stages working on high idle current state. The diamond cross output stage design can avoid "switch distortion" as good as the class A amp.

The ACSS is a non-feedback technology made with fully discrete amplifiers. Most people know the global feedback design can offer better specs in test measurements, and non-feedback can't do well in test measurements but can offer better sound for the human's ears. Here is a conflict of the classic circuits. But the ACSS opens a new field, it can offer a least coloration sound which is more neutral with very low distortion and high linearity. So it can retain the dynamics, detail and neutral sound but not sound bright or harsh.

All signal gain is in current, achieved by the unique, superb open-loop multiple output current mirror. Incomparably precise and ultra-low distortion in the gain signal is the result. The signal path is balanced throughout and all transistors work in class A mode.

Because the product has the low impedance transformers design, if the power line (120V or 230V) has serious disturb, usually will has the low voltage DC in the power line, cause the transformers have the vibration and cause the noise.

Even though in the same serious disturb in the power line, the high impedance transformers design can without vibration and noise, for example the R core, EI core or high impedance design O core transformers. But for the power amp, the high impedance transformer design has effect and degrade on sound dynamic, bass impact and control.

Because the serious disturb power line is rare, based on the customers feedbacked, it has around 10% users meet with serious disturb, so our power amps have not include the DC blocker. If customer has experience on vibration and noise in last power amp model, customer can custom order the DC blocker, it can kill 1.2V DC of the power line which is enough for most case.