Quote:
Originally Posted by kalee20
I like the chassis!
Yes I agree to match at the remote the end... But that's only if the cable has 30Ω characteristic impedance and also it's electrically 'long.' Assuming that it isn't, and also that the MP3/CD output you're using is the headphone output, why would you deliberately load this down? Almost certainly it'll just be a complementary NPN/PNP emitter-follower pair, with beefy enough devices to drive 30Ω without dying... why not give them an easier life by letting them just feed into a near open-circuit, and avoid any crossover distortion at the same time?
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The amplifiers shake everything when cranked up a bit. They are heavy enough not to shake themselves to bits too.
MP3 players are almost all 30 ohm and most decent CD players also have a 30 ohm output so that is the lead I use. 33ohms it the normal value to go in the jack plugs.