Looks like the company has been resurrected in the UK, but production in China, they have a website. The new amps says nothing about their lineage of the old MosFet designs that made them famous. The amp designs look very well built for the prices IMO. The new ones state class D power section. I'm mostly just curious.....
Here's specs from their big power amp M2000
The HH M Series power amplifiers are ultra-high power, flexible 4 channel 2U rack amplifiers designed to provide maximum performance.
Features
Unit Weight: 9Kg/pc, 19.8 lbs/pc
Unit Dimensions: (Hwd) 483 x 306 x 89mm, 19" x 12" x 3.5"
Indicators: Signal/Clip/Protection/Power/-5dB/-10dB/-20dB leds
Controls: Volume Control knobs (per channel), Power switch
Power Connector: 13A Removeable IEC Power Cord C14
Other Controls: Sensitivity switch (per group) , Stereo/Parallel/Bridge Mode Switch, Input Link Mode Switch. Mains Input
Output Connector: NL4 Speakon per channel
Input Link Connector: Balanced XLR-M
Input Connector: Balanced XLR-F
Amplifier Type: High Performance Professional Class D
Psu Type: Universal Auto Switching 100-240V~
Output Power: 8 Ohm Stereo 4 X 500W
Output Power: 4 Ohm Stereo 4 X 750W
Output Power: 2 Ohm Stereo 4 X 950W
Output Power: 8 Ohm Bridge 2 X 1300W
Output Power: 4 Ohm Bridge 2 X 1900W
Frequency Response: 20HZ - 20KHZ (+0, -1.5DB)
THD%: ≤0.1%
S/N: ≥100DB
Damping Factor: 500
Slew Rate: ≥10V/ΜS
Input Sensitivity: 0.775V/1.0V/32DB
Input Impedance (Bal/Unbal
20KΩ/10KΩ
Voltage Gain (8Ω
38.2DB
Cooling: VARIABLE SPEED FAN, AIR FLOW FROM FRONT TO REAR
Protection: SOFT START, VHF, RF, SHORT CIRCUIT, OVER LOAD, CLIP LIMIT, OVER HEAT, PROGRESSIVE VOLUME, OVER/UNDER VOLTAGE