Quote from a diyAudio thread:
"Running tests these days on VHex+.
First, the bias is right on the spot from the time I switch the power on till the heat sinks reach 50 degrees Celsius. Rock stable. Also, the offset is easy to set.
Square wave is perfect. All measurements are made at +/-53Volts with 8ohm load.
Very nice good sounding little amp!"
VHex+ modules mounted on a heatsink.
Clipping at 1KHz - seamless recovery.
1KHz square wave response.
Rise time = 1.3uS at 64V => 49V/uS slew rate.
FFT 1KHz 20V RMS @ 8 ohm load (50W RMS).
FFT 1KHz 30V RMS @ 8 ohm load (112W RMS)
Note that excellent harmonics profile - practically only H2 and H3 are in place, no high-order components produced.
The amplifier is relatively simple and very easy to build and setup.
See the posts about the other nice VHex+ builds: