The LDA ultra low distortion audio power amplifier home

The Euraudio LDA ultra low distortion power amplifier family consists of three high performance audio power amplifier DiY kits, which are recommended for experienced hobbyists interested in high-end audio. Each kit contains the LDA17 ultra low distortion power amplifier board with high power or medium power component set and other necessary circuitry like power supply, protection circuits (not all kits), and relay. There are stereo, dual mono, and mono kits available.

This is the start page of the LDA, from here you can reach

- the description of the LDA kits,

- the assembly instructions of the LDA MIN, LDA DMON, and LDA MON kits,

- photos of LDA amplifiers built so far,

- some development information about the LDA project,

- and the specifications of the kit components.

The LDA kits

Click the image below if you want to read about the LDA kits available.

Assembly instructions

Click the images below for the assembly instructions of the various kits.

       

Photos of LDA builds

Click the image below for photos of the LDA amplifiers built so far.

Development information about the LDA project

Click the image below if you want to read how the LDA project evolved. See some prototype images, measurement results, and read about listening tests.

Specifications of the kit components

Click the links below for the specifications of the various kit components. Kit components are mono, unless otherwise noted.

Audio power amplifier

LDA17 Ultra low distortion audio power amplifier

Power supply & relay

PSSR350 Power supply & ultra low distortion solid state relay

PSS701/PSS702 Power supply & ultra low distortion solid state relay

Protection circuit

APBF/APBM Protection circuit

Mains input/distribution & +12V power supply

"MI12", a proposed Mains input/distribution & +12V power supply

Power supply

PS1S Power supply, stereo

Switch-on mute circuit with relay

SPRS Switch-on mute circuit with relay, stereo

Mains input/distribution & auxiliary AC power supply

"MIA", a proposed Mains input/distribution & auxiliary AC power supply

 

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