Heros is like no other amplifier ever made as it has a single differential DC coupled FET/Tube stage working like a single super tube. This DC coupled cell is loaded by a low impedance push-pull transformer helping improve the efficiency to almost double that of a normal Solid State Class A designs. The output transformer blocks DC on the output and presents many other benefits by isolating EMI/RFI, scaling down the output voltage (reducing residual noise) and protecting the output from any power supply noise by canceling it by the nature of it’s differential operation.
Тo guarantee a fully differential architecture we split the phase with the input transformer and sum it back up with the push-pull output transformer. This solution completely floats the the gain cell between the two transformers isolating it from any external influences making Heros immune to the influences of its environment.
The power supply uses high voltage Silicon Carbide diodes followed by a filter choke preventing any switching noise from reaching the output stage. The result is an amplifier free of grain and fizziness or screaming intermodulation, giving new meaning to transparency and tone density. We use our beloved 6N6P as the base for the proprietary DC gain cell, a recognized audiophile performance tube. To keep all at this level we chose a silver wire permalloy input transformer and the highest grade custom toroidal output and power transformers.
Operating all devices in class ‘A’ produces a fair amount of heat, so to handle that the Heros’ chassis itself is a heat sink. It is still the most compact 100-watt class A solid state amplifier available today.The chassis is designed not only to cope with the heat produced by the components but to provide a vibration-free structure to house them. Heros shares it’s chassis design with our other hybrid power amplifiers – Teres, but all similarity ends there. Heros can handle any speaker giving it a new voice.
Tube amplifier architecture with the simplest signal path
Transformer coupled input and output
MOSFET output devices
Silicon Carbide diodes in power supply
Silver input transformer
Pre-settable speaker impedance
Our favorite 6N6P tube used
Fully balanced differential operation
RCA and XLR inputs
Compact chassis built like a tank
100W Class A power output
DC-coupled, no capacitors in signal path
Choke filtered power supply
Weight: 35kg Dimensions: 340 x 450 x 230 mm Power: 260W 115/230V 50/60Hz Max. input level: 4V Output power: 100W Gain: +18db Input impedance: 3k Ohm Output impedance: 0.5 Ohm Signal to Noise: 118db Frequency response: 20-20,000Hz +/- 1db