MA-3 Mk 3.3
Output power500 watts per channel, 2-16Ω load before clipping
ImpedanceInput Impedance: 100 KΩ single-ended, 200 KΩ balanced
selectable to 600 ohms
Input2.5 V sensitivity
RCA and XLR true balanced differential input
Tube complement(per channel) 42 x 6AS7G output tube
12 x 6SN7 driver tube
Power Bandwidth1-100KHz within ½ dB
Power Storage Capacity1/4 Farad per channel (more than any production amplifier)
Frequency response(1 watt, open loop) 20 Hz squarewave tilt: unmeasureable even at full power
1Hz-200KHz within 1/2 dB
There is clearly a need for such an amplifier that can make serious power while being completely transparent and musical; fortunately our OTL technology is well-suited to the task. Since we are not limited by issues that plague conventional amplifier designs, the MA-3 retains a wide bandwidth and low distortion simultaneouly. No transformer-coupled amplifier can produce 200, yet alone 400 watts and get it right at every audio frequency; yet the MA-3 makes 500 watts easily, without electronic artifacts. It's high-power amplifier that is fast and truly musical!
The MA-3 has all of the features as our other models, plus a few not seen in any other amplifier ever produced. It is class A, all-triode, and fully differential, with our patented direct-coupled output circuit and patented automatic bias control. There is only a single gain stage in the amp, so the signal path is very direct - something unknown in amps of this class. And with all it's customised components, including custom precision Caddock resistors and tailor-made filter capacitors, it is one of a kind inside and out.
The overall output power of the MA-3 can be varied by turning on or off banks of output tubes; the amp can operate on 1/3, 2/3, or all of the output tubes. This makes the amp very easy to live with! Of course, even at lower power levels, the MA-3 retains the innate authority and musical character that defines it as state-of-the-art.