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Home > Finished Products > Goldmund Circuit Mono Power Amplifier Board, Adjustable Class A Bias Current, HiFi Audio Amp PCB

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Goldmund Circuit Mono Power Amplifier Board, Adjustable Class A Bias Current, HiFi Audio Amp PCB

Name: Goldmund Circuit Mono Power Amplifier Board, Adjustable Class A Bias Current, HiFi Audio Amp PCB
Brand: Emoryseric | HiFi Music Muse
Price: 31.26 USD
Availability: InStock

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Description

Version:

Version A: Fully Assembled & Tested Amplifier Circuit Board using UK-made ECX MOSFETs
Version B: Complete component kit excluding output/power tubes (for self-assembly)

GOLDMUND POST AMPLIFIER CIRCUIT

Based on the GOLDMUND 29 series circuit reference

Extremely low noise, high signal-to-noise ratio

Materials and Construction

Latest JFE2140 matched dual FET for differential input stage

Utilizes 2 pairs of British ECX FETs (as used in original Goldmund machines) in parallel output configuration

High-end KOA resistors

American Alpha brand solder wire

High-end Kingboard laminate PCB, 2mm thick, with 2oz heavy copper foil

Specifications

Power Supply Voltage: DC ±35V to ±60V Recommended ±55V, 120W into 8Ω

Output Power: 30W - 150W

PCB Dimensions: 89mm x 96mm

AP Test Data Refer to G3 Complete Unit AP Test Chart

Output RMS Voltage: 27.4Vrms

Channel Gain: 29.6dB (30.4 times)

Signal-to-Noise Ratio: 121.5dB

Dynamic Range: 121.8dB

THD: 0.0006%

THD+N: 0.002%

Frequency Response Bandwidth: ±0.064dB

The image below shows the version sold for many years, utilizing K1058/J162 power transistors.

British ECX FETs As used in original Goldmund complete units Available from May 2025

AP Test Data for the G3 Complete Unit utilizing this circuit

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Goldmund Circuit Mono Power Amplifier Board, Adjustable Class A Bias Current, HiFi Audio Amp PCB

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Goldmund Circuit Mono Power Amplifier Board, Adjustable Class A Bias Current, HiFi Audio Amp PCB

Quantity:

CUSTOMER REVIEWS

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