Jarek Lupinski created an active loudspeaker for use with his I-pod in this little project. He purchased a cheap centre speaker from a Goodwill store and adapted it for passive use. Using a LM4950 - 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier chip from National Semiconductor running in DC mode as his source, this powered speaker is capable of being powered by batteries.
The plastic speaker case and low power means I can’t imagine this project as reaching the higher echelons of High Fidelity music, but it is probably as capable of any of the standard commercial offerings. Jarek built this with loose change scale funding and gets the satisfaction of building his first chip amp!
Read more at Jarek’s site…
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