Channel: John Heisz - Speakers and Audio Projects

Category: Howto & Style

Tags: how tomakingi build itwoodworkingdiymakermakejohn heisz

Description: I'm taking a detour and making a 2 channel class AB amp to power my subwoofers. Since I already have the amp boards I designed, made and tested10 years ago, the bulk of the project will be building the chassis / case. The transformer is a 540VA toroid that puts out 102VAC CT, and that translates to around +/- 73VDC. I may switch this for one with a lower voltage, if I have one that's big enough. The amplifier circuit design is based on the Luxman M-02 folded cascode. Of course, all of the very excellent transistors that were available when that amp was first designed are now obsolete and long out of production, so I had to find suitable modern replacements for them. But that was 10 years ago and even some of the ones I used that were available then are obsolete today. I'm pretty sure I have enough of the ones I used originally to complete the second board to give me a stereo pair. I do need to make the power supply, but that is fairly simple. The chassis will be made entirely from 1/8" thick aluminum and that and the heatsinks shown in the video should provide enough cooling. You can help support the work I do in making these videos: Project plans for sale: ibuildit.ca/plans Join the ibuildit community on Loacals: ibuildit.locals.com Support this channel on Patreon: patreon.com/user?u=865843&ty=h #diyspeakers #johnheisz #audio My "Scrap bin" channel: youtube.com/c/IBuildItScrapBin My main channel: youtube.com/user/jpheisz Website: ibuildit.ca Facebook: facebook.com/I-Build-It-258048014240900 Instagram: instagram.com/i_build_it.ca