Based on the proven technology of our classic pow-amp, the product family has been expanded to include a modular, scalable power amplifier in three variants and with up to four channels: The pow-amp 4S realises a stereo power amplifier with half the power of the pow-amp and offers the most affordable entry into the special sound world of our pow-amps. The pow-amp 4 adds a second identical stereo branch, providing four channels with an identical total system output compared to the pow-amp. The pow-amp 4M has the same dual-mono design as the classic pow-amp- with identical system performance. This differs from the pow-amp 4 variants in that it has a more complex input stage (direct button, RCA option), power supply and premium components in the output filter.
With analogue pulse width modulation (PWM), we use a relatively new operating principle for our pow-amps. As it makes it possible to build powerful yet compact amplifiers, it only found its way into large-scale industrial production. However, if this working principle is put to the uncompromising service of maximum transmission quality, results can be achieved with the process that would be very difficult or impossible to achieve with conventional technology: It combines the speed and finesse of the tube with the power and low distortion of transistors.
Another advantage of this working principle is its high energy efficiency. It breaks through the paradigm of conventional amplifier designs, according to which good devices are large and heavy and produce a lot of heat in order to serve the “power-hungry” loudspeakers. We measured it ourselves: One hour of listening to music with the pow-amp consumed only 60W/h even with the most power-hungry 3-ohm speakers at a deafening volume. Yes, even if pulse power of up to 1000 watts is possible, music is very dynamic and on average only a fraction of this is actually required over time. In comparison, a 35 watt Class A power amplifier can “burn” 200W/h just through quiescent current, i.e. without any music at all.
