[22 W Audio Amplifier]

I see

Thanks  :)

[22 W Audio Amplifier]

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

[22 W Audio Amplifier]

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!

[22 W Audio Amplifier]

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

[22 W Audio Amplifier]

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  :)