To Benno’s knowledge, Constellation Audio is the only other company that does this and then with multiple pairs rather than one. This type of transistor is not available in the usual complimentary positive and negative pairs (PNP and NPN), but just NPN or ‘negative’ and GamuT had to do a lot of work to stabilise two of these devices for each channel, effectively turning them into a pair. So how does GamuT get away with using only one device? I asked engineer Benno Baun Meldgaard this question and he explained that they use industrial transistors that were developed for motor control and welding, and are even able to handle 400 amp peaks. The reason that solid state amps have multiple output devices is because this gives more power and more power needs more heat dissipation. Manufacturers therefore tolerance their output devices as tightly as possible Naim takes this to its logical extreme with its Statement amps, where each set of output transistors are made from adjacent pieces of silicon from the same die – but that is clearly a pricey approach. GamuT amplifiers use a single high-current MOSFET output transistor per channel, where most other solid state amplifiers use multiple output devices and if these differ in their electrical characteristics, distortion creeps in. The M250i is an even more powerful monoblock, but the as the name suggests, the D200i’s delivers a healthy 200W in its own right. GamuT makes two power amplifiers, of which this is the stereo option. Hearing the latest D200i brought back what I loved about this Danish beast.

I liked it a lot, but somewhere along the upgrade path to MkIII status, it began gathering dust and I let it go. I have some history with the GamuT D200 power amplifier the original version was my reference amplifier for many years and powered at least two generations of Bowers & Wilkins 802 Diamond speakers.

Gamut d200 service manual