Hitachi/Lo-D is industries leader in audio power mosfet.
HMA4590 is Power mosfet amplifier, similar to valve amplifier,
Excellent condition and working order.
 
**** compatible pre-amp available at lankan audio ****
 
Linear dynamic range 
Low distortion= 0.01% THD at 30W
simple circuitry thanks to Voltage biasing on Mosfet
Low weight due to low power consumption.
up-to 100khz frequency response
2 set of speakers connectable.
LED Volume meter
Headphone socket
 
This is 100V only