The LDA ultra low distortion audio power amplifiers home
The Euraudio LDA ultra low distortion power amplifier family consists of 7 high performance audio power amplifier DiY kits, which are recommended for experienced hobbyists interested in high-end audio.
Each kit contains the LDA14 or LDA17 ultra low distortion power amplifier board with low, medium, high, or extra high 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 amplifier family, from here you can reach
- the description of the LDA kits,
- the assembly instructions of the kits,
- the specifications of the kit subassemblies,
- photos of LDA amplifiers built so far with the opinion of their builders,
- the Frequently Asked Questions,
- and some development information about the LDA project.
Assembly instructions
Click below for the assembly instructions of the various kits.
Specifications
Click the links below for the specifications of the various kit subassemblies. Subassemblies are mono, unless otherwise noted. (2 mono subassemblies are needed for a stereo amplifier.)
Audio power amplifier
LDA14 Ultra low distortion audio power amplifier
LDA17 Ultra low distortion audio power amplifier
Power supply & relay
PSS701/PSS702 Power supply & ultra low distortion solid state relay
PSSR2S/PSS2S Power supply & two ultra low distortion solid state relays, stereo
Protection circuit
Mains input/distribution & auxiliary DC power supply
MID2/MID2A
Mains input/distribution & auxiliary DC power supply
Power supply
Switch-on mute circuit with relay
SMRS Switch-on mute circuit with relay, stereo (obsolete)
SMRS2 Switch-on mute circuit with relay, stereo (obsolete)
SMRS3 Switch-on mute circuit with relay, stereo
Mains input/distribution & auxiliary AC power supply
"MIA", a proposed Mains input/distribution & auxiliary AC power supply
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 and the nulltest.
