TOSHIBA SA-7150 (1978) - World's First Digital Synthesizer Receiver.

You are looking at the world's first receiver with a digital Phased-lock Loop (PLL) frequency sythesizer for both FM and AM. The SA-7150 delivers tuning accuracy that approaches theoretical limits not possible with pointer and tuning meters. This is of enormous importance if music is important to you. Accurate tuning of the precise broadcast frequency means the lowest possible distortion, the greatest possible fidelity and the widest possible dynamic range. Toshiba had the resources and technical expertise to originate as well as manufacture the many ultra-sophisticated parts and circuits such as LSI's in the synthesizer section that assure the purity of the original signal. The SA-7150 is decidedly not your average receiver. But then, Toshiba isn't your average company.

Continuous Power Output:

150 W/channel (min. RMS at 8 ohm, 20-20,000 Hz , no more than 0,05% T.H.D.)

Dimensions (W x H x D):  550 x 200 x 500 mm

Weight:  27 kg

DENON POA-8000 - State of the Art Power

State of the Art mono power amplifier introduced in 1981 by DENON. I think the POA-8000 can easily compete for the best looking monoblocks ever. It is using a ultra-high stability and ultra low noise construction with DENON's Non-NFB Class-A design. This design will prevent transient distortion and it will provide excellent dynamic characteristic. A high speed, high linearity 3-stage powerful Darlington power stage is used while DENON's real bias circuit is enabling high efficiency Class A operation. Large VU meters and Digital display adds the final touch to this beautiful power amplifier. The POA-8000 set was partnered by the equally well designed and handsome DENON PRA-6000 preamplifier.

Technical data...

DENON POA-3000RG (1990) - MOS Super Optical Class A

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 switched 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. 

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