XFAMPS01 - Enclosed Stereo Audio Amplifier

LM1875 Class-AB 36W

This is a flat Class-AB audio Amplifier. All modules are made using though-hole components only, that are soldered to 3mm traces of single-sided FR-4 PCB. XF-AMPS01 is powered by regulated dual ±DC power supply that is decoupled from main via transformer. This unit features large capacitors, large heat sinks, phoenix connectors and double insulated enclosure. Driven by 2 LM1875 USA-made ICs this amp is build to last.

Features

• Stereo Output
• Total Output Power: 36W RMS
• Low Distortion: 0.015%,1kHz,20W
• Wide Power Bandwidth: 70 kHz
• Volume Control
• LED Power Switch
• MDF Enclosure
• Stand-by AC Power Draw: 3-4W

Specifications

• LM1875 Class-AB IC
• Optimal Load: 4Ω-8Ω/channel
• Input Impedance: 47k Ohm
• Power Input: 120VAC 60Hz
• Operating Temperature: 0-70°C
• AC Power Input: 120V AC 60Hz via Polarized Cable IEC-60320

Dimensions & Weight

25cm x 16cm x 8cm
9.8" x 6.3" x 3.1"
Weight 1.75kg / 3.88lb

Resources

XF-AMPS01 Amplifier Manual - PDF
XF-AMPS01_Amplifier_Manual.pdf (1.5mb)

XF-AMPS01 Thd and Freq Response
XF-AMPS01_thd_freq_response.pdf (241Kb)

Schemas, gerbers, models, masks and more:
XF-AMPS01 GitHub Repo

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XFPCB003 - Class-AB Amplifier 20-30W LM1875

LM1875 Amplifier Board

The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.

Specifications

• Load: 4Ω - 8Ω
• Output Power: 30W
• Supply Voltage 12V-36V(±18)

Features

• Low Distortion: 0.015%, 1 kHz, 20 W
• Wide Power Bandwidth: 70 kHz
• High Current Capability: 4A
• Protection for AC and DC Short Circuits to Ground

Dimensions

PCB Clad: 76mm x 66mm
Height/w Heat sinks: 50mm

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XFPCB004 - AC to Dual ±DC Regulated Power Supply

Regulated Bipolar Dual Voltage Board

Dual ±DC Output Power Supply built around LM7918 & LM1818 regulators(IC Regulators are made in USA). This power supply is intended to be used with VAC centre tapped transformer for audio amplifier applications.

Features

• Input Voltage Filtering
• Low Output Ripple, Voltage Stable to ±0.005VDC
• Through-hole components, single-layer FR-4 clad using wide copper traces(3mm+).

Dimensions

PCB Clad: 76mm x 66mm
Height/w Heat sinks: 30mm

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XFPCB006 - Stereo Out

3.5mm Audio Input Jack Breakout Board

3.5mm stereo audio jack to 2 Phoenix connectors breakout board.

Specifications

• Phoenix connectors.

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XFPCB007 - Mono Sum

3.5mm Stereo Jack to Mono Sum Breakout

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XFPCB008 - 2-Channel Potentiometer Volume Control Board

Stereo Volume Control

2-Channel Potentiometer Volume Control Board