22 May 2018

DENON POA-3000RG - MOS Super Optical Class A

POWER AMPLIFIER

The first model of the PRA-2000 / POA-3000 series from DENON was introduced in may 1979. Production has continued for 14 years and the 4th generation, the PRA-2000RG / POA-3000RG, were manufactured until 1993. This power amplifier used a DENON proprietary technology called "MOS Super Optical Class A Circuit" This new inverted-Darlington connection in the driver stage allows a flow of bias current 10 times higher than the previous DENON Optical Class A circuit. Supporting this optical power amplifier is "optical coupling" which transmits the control signal from the bias control circuit to the bias circuit. By using the optical element, the interference between the main signal system and the bias control circuit is completely eliminated, and the bias control is realized at high speed. The amplifier delivers 250 W/ch in Stereo mode while the power increases to 500W when swithed to mono operation. For the power section a large toroidal transformer is used with large power source capacitors. Current is independently supplied to the power stage and the pre-driver stage, all this through a complete dual mono construction. 


POWER AMPLIFIER

POWER AMPLIFIER

POWER AMPLIFIER

POWER AMPLIFIER

POWER AMPLIFIER

POWER AMPLIFIER

POWER AMPLIFIER

POWER AMPLIFIER