02 May 2024

DENON POA-1500 | PRA-1000 (1983) - Real-Time Audio Technology

Real-Time Audio Technology

Brand: DENON
Model: POA-1500 | PRA-1000
Year: 1983

The POA-1500's non-feedback circuit detects only the distortion in the output stage and performs "direct distortion servo" (distortion canceling circuit), theoretically reducing distortion to the zero region. In this method, the music signal is transmitted only in a fixed direction and does not have input feedback, thereby improving dynamic characteristics. A DC amplifier configuration is adopted, and all signal paths are completely capacitorless. By adopting a direct DC servo circuit, coupling capacitors related to coloration of the sound are eliminated from input to output. A large-sized toroidal transformer and a large-capacity block capacitor are adopted as a power supply part. In the PRA-1000 a non-feedback buffer amplifier is used on the output side, and the signal is sent to the power amplifier that serves as the load in an optimal state. This circuit has a completely symmetrical cascade bootstrapped complementary FET input non-feedback configuration. In addition, a newly developed DC servo circuit is adopted to stabilize the DC offset, and by blocking drift at high speed, the influence of DC deviation on the power amplifier is prevented. The flat amplifier consists of a high-speed OP amplifier and an ultra-low noise FET differential amplifier. By adding a cascade bootstrap circuit to the first stage, distortion increase due to the influence of the first stage volume is prevented, and low distortion characteristics are obtained. Moreover, by incorporating a tone control element into the feedback circuit, a tone control circuit with a simple an configuration is formed. Available in black and silver with wood side panels.

DENON POA-1500 Power Amplifier
Continuous power: 2X150W (8ohm, 20Hz to 20kHz)
Total Harmonic Distortion: <0.002%
Frequency Response: 5Hz-80kHz 
Signal to noise: 123dB
Dimensions (WxHxD): 470x168x418 mm
Weight: 20 kg
Original sale price: 1999 DM Germany
DENON PRA-1000 Pre-Amplifier
Total harmonic distortion: <0,001%
Frequency response: 2Hz-300kHz
Dimensions (WxHxD): 464x124x312 mm
Weight: 6 kg

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Real-Time Audio Technology

Real-Time Audio Technology

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