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davecoles1

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  1. So what is a bridged amplifier? I thought it was to do with the fact that it could drive two channels (stereo). Maybe I need to look at some different drivers... Thanks so much for all the help
  2. O dear. What am I to do? I just wanted to build a nice small amplifier to power a couple of full range drivers to have somewhere like the computer or the kitchen or something. Why do all the amplifiers seem to need such a high voltage supply? I would have thought 12 V would be a nice and common voltage supply to work from. But then again, I don't really know much about this kind of thing!
  3. Hello again, Thanks so much for the replies, I'm never quite sure if I'll get a reply or not :) So you're saying the way to go may be with 8 ohm drivers? If so I'm glad I didn't order the 4 ohms yesterday! 7 watts should be enough - the drivers I'm looking at have a sensitivity of 86 dB so theoretically 7 W should give another 8 dB which should be loud enough for the application I'm looking at. And 7 W dissipated as heat sounds a lot more agreeable :) I could always just put an ammeter on the input and see how much current it'll draw couldn't I? Does all this sound sensible? Thanks again, Dave
  4. Hi, I have some questions that I couldn't find the answers to on these pages. It's regarding the amplifier found at: http://www.electronics-lab.com/projects/audio/006/ It says at full power the amp will draw 5 amps of current which seems pretty high to me! If I use a supply rated at say 1.2 A, what will happen as the amplifier tries to draw more than 1.2 A of current? Will it kill the supply? Or will the supply just limit the current and therefore the resulting volume? Also, if I wanted to add a volume control, what's the best (but not too complex) way of doing that? Put a potentiometer across the inputs to the op-amps? Any answers would be greatly appreciated. Thanks, Dave :)
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