# Aleph-30 Class-A Power Amplifier Circuit

**Electronics Projects, Aleph-30 Class-A Power Amplifier Circuit article
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The Pass Aleph 30 is the first of the second generation of Aleph single-ended Class A power amplifiers. This design results from my commitment to create the best sounding product, a simple circuit having the most natural characteristic. The Pass Aleph 30 integrates power Mosfet devices and pure single ended Class A operation in a simple two-gain-stage topology with the sole purpose of recreating subjectively natural sound.

## Aleph-30 Class-A Amplifier Project

**Class A power amplifiers SPECIFICATIONS**

Gain 20 dB balanced, 26 dB single ended

Freq. Response – 0.5 dB @ 2 Hz, -1.5 dB @ 100 KHz

Power Output 30 watts/ch @ 8 ohms, 40 watts @ 4 ohms

Maximum Output 25 volts, 5 amps

Distortion (1KHz) 0.2% @ 30 watts, 8 ohms

Input Impedance 47 Kohm single-ended, 52 Kohm differential

Damping factor 100

Crosstalk -80 dB 20-20 KHz

Balanced Input Rejection -50 dB typical CMRR

Output Noise 500 uV unweighted

Random noise floor 5 uV typical

DC offset 100 mv

Power Consumption 200 watts

Temperature 25 degrees C. above ambient

Dimensions 17 ” W x 15.5″ D x 5.5″ H

Shipping Weight 45 lb.

Source: www.skip.informatik.gu.se/~kmg/diyaudio/projects/aleph30 **Aleph-30 pcb schematic Alternative link: **aleph-30-class-a-power-amplifier-circuit.rar alternative link2 alternative link3

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