Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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Re: DIY Amp Projects/Kits

208.128.37.133

Posted by rob selina on March 30, 1999 at 17:56:47

In Reply to: Re: DIY Amp Projects/Kits posted by Kelly McDonald on March 30, 1999 at 16:12:36:

you don't need half as much power as you thought. 50 watts would be killer, you could pull it off nicely with 20 watts. even 10 watts would work if you wanted to though, but your dynamics might suffer a little and it wouldn't go very loud (probably about 90db at your average listening position). I have speakers with an 86db sensitivity and a 6 ohm load and they get obscenely loud with 50 watts. In all reality, most amps are only producing a watt of power to achieve loud levels. You speakers for example can go up to 91 db at 3 ft. Now you probably sit about 9 ft away from your speakers or so requiring a total 4 watts to produce 91 db. (think I got the math right) Now 91 db is pretty loud, I think anything over 95 is too loud and hurts my ears. I'm only listening to music at about 70 db right now, meaning that I'm using less than a watt! I'd shoot for a 20 watt design if I were you. And go with tubes for DIY, much easier than all that soldering ;-)
happy building,
Rob

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