My HiFi DIY Amplifier: LM3886 GainClone
Realization details of my DIY Hi-Fi amplifier based on the the GainClone chip (formerly LM3886).
I started this project in the spring of 2004... I was going to finish high schools and departing for university, and absolutely I couldn't allow to leave without my music. I decided to build a poweramp for my next years and now I feel I should share some indications for the next ones who want to realize their own. I found an interesting project, the GainClone integrated amplifier (formerly LM3886). The circuit is absolutely straightforward, all it needs is a clean power supply source and a bunch of external components.
I bought kit parts years ago from a private seller. Actually I discovered that the private seller enlarged his business (or at least as appears from his site) and now he's still selling GainClone kits at chipamp.com.
The reported specs for the LM3886 are: - Maximum Output Power: 68W RMS - 108W Peak - THD: %0.03 at 60W - SNR: 110dB at 60 W - 92.5dB at 1W - PSRR: 120dB - Protection: Short circuit protection and thermal - Output Class: Conjugate AB-A
Additionally you can find more schematics and assembly manuals on the ChipAmp website. Note: I'm absolutely NOT related in any form with that site and I don't make any money from its sales. I just find it a quality product at a really nice price and I'm just glad to provide useful hints.
Cabling was really simple. Finally i put all the stuff in a nice cabinet I bought from an Italian electronic DIY magazine nuovaelettronica.it, part no. "MOB. LX.1361". Sounds really good (more than you can think comparing other product with same price). It has a reported power of 55W rms for channel (that's absolutely more than my needs). If you're interested in the project you can follow discussions and rewiews on DIYAudio forums. The work took a pair of weeks to complete and yes, now I'm still happily using my poweramp with my loudspeakers. Update: 8 years later, the spearks and the amp are still up&running and followed me in UK in my London flat. Yay!
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