Astro's Electronics Lab

AUSTRALIA • + Follow

Greg Sampey

NEW ZEALAND
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Description

NE5534 5W Utility Power Amplifier

I needed a small amplifier to drive a pair of bookshelf speakers for testing other audio gear, such as tape decks and CD players, etc. I didn't need a lot of power, so I came up with this simple 5W power amplifier based on the NE5534 operational amplifier IC. Under testing at +/-18VDC, it produces 4.6W in to 8 ohms and 7W in to 4 ohms and is very stable. At the designed supply voltage of +/-25V (using an 18-0-18 50-60VA torodial transformer), I expect this will produce closer to 10W in to 8 ohm. This is perfect for my scenario for a "bench-test amplifier". Enjoy!

Original breadboard video:

Video of PCB assembly:

Schematic and Layout

Schematic

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May 10,2025

895 views

NE5534 5W Utility Power Amplifier

1 Layers PCB 56.632 x 52.969 mm FR-4, 1.6 mm, 1, HASL with lead, Blue Solder Mask, White silkscreen

Simple 5W audio power amplifier that can be used as a test amplifier for other audio equipment.

895

Published: May 10,2025

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