DENON PMA-1010D (1987) | Digital - Class A

 

The PMA-1010D from Denon is a pure A-class pre-main amplifier with built-in D/A converter. It operates in class A up to 1W output (8 Ω) for low distortion and high quality sound. In order to cope with the temperature rise of class A amplification, the fin of the heat sink is doubled, and the block is firmly combined with a copper plate with good heat conduction and fast vibration damping, to achieve high heat resistance and no resonance. The power supply section is equipped with a large power transformer, fast recovery diode for high-speed rectification, and 48,000 μ F electrolytic capacitor for audio. Stabilization is achieved by the adoption of balanced floating power supply system. A large heat sink separates the power supply from the main signal system. The built-in D/A converter uses a 4 DA push-pull super linear converter. This converter consists of two carefully selected D/A converters for the left and right channels, each of which functions like a class A push-pull. It also consists of a four times over-sampling digital filter, a sample-and-hold circuit, and an LC-OFC 7th-order C. A. L. P. (linear-phase) low-pass filter. The digital input section consists of coaxial digital input and optical digital input systems. Equipped with a digital input selector using a high-speed C-MOS logic circuit, it automatically identifies CDs, DAT and DBS and transmits them to the D/A converter. In addition, in order to eliminate interference with the converter section, "opto-isolated" method by optical coupling is adopted. The power cord features polarity display. Technical data: Rated power 140W/ch 8ohm | THD 0.003% | Output bandwidth 5Hz-100kHz | Dimensions (WxHxD) 474x174x396mm | Weight 22kg

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