QuoteJust test it and you tell us.
Will do. I've already picked-up that this is the MO around here.
Ray
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Show posts MenuQuoteJust test it and you tell us.
Quote from: J M Fahey on August 30, 2009, 07:33:38 AMYeah, that's close to what I've been thinking. I should breadboard it and then thinker until I find something that will hold me over until the next project and then hard wire what I've put together. I've become too used to planning everything out in as minute detail as possible before starting. Actually, as I've been reading more posts here, and I'm typing this, I'm beginning to realize how many of the details are subjective and I actually may have hit the "as detailed as possible" with a lot more "We'll worry about that when we get there" items than I'm used to.
... No enclosure, nothing, plus any salvaged speaker in a cardboard shoebox. If you like what you hear (you will), you can add whatever you want: a TDA20xx power booster, a cabinet, better or more speakers, whatever.
Quote from: Brymus on August 29, 2009, 06:36:08 PMThat's the thing. I can do the circuit design, enclosure design, etc., I just have no idea of what the other amps will sound like over driven, and for the first project, I'd like something that's more of a sure thing.
Yeah re-amping the "Ruby" or 386 is a good starting point.
I cant say its the best because its not,but if you like the clipping characteristics of the 386 chip(like I do).Then its good and simple.
Quote from: J M Fahey on August 29, 2009, 08:36:38 PMThanks. I'm in the home stretch, hence the planning for "me" projects when I get home. The "house" and "family" projects are planned out for the first nine months after my return easily.
Hi ElRay.Quote(Un)Fortunately, I'm in AfghanistanUgh!!, all I can tell you is that I wish you a happy return home a.s.a.p.
QuoteReturning to your amplifier, if you have only 12V available ...12v is a design choice -- The RP150 already uses a 12v wallwart, and that's also 8 AA/C/D batteries if I wanted some portability
QuoteThe speaker you quoted *can* work, but is not very efficient, strictly a bedroom proposal.I thought these were reasonably efficient, but I've been out of this realm for a while. Isn't the efficiency: SPL: 85 dB 1W/1m? So, If I'm 1m away from the speaker, and I've got the full 1W from the 386 going through the speaker, the volume should be about 85 dB, correct? The amp isn't meant to be too loud, but I'd like a bit of "reserve" if I needed it. But then again, a lower impedance speaker would allow the 386 to put out a bit more power. I'll have to check the spec sheet, maybe the 1W was into 4 ohms and not 8 ohms.
QuoteIf you get your distortion from an overdriven LM386, the power booster needn't distort itself.I was hoping to get the distortion from the power stage, like the Ruby. I wasn't really wanting to add another stage after that, unless adding another stage is the best bet.