"Sal" salmonella@food poisoning.org wrote:
"Jerry Stuckle" wrote in message
...


OK, so instead of putting out 100W to one eight-ohm speaker, you're
putting out 100W to two eight ohm speakers. So you have a 3db gain,
assuming the speakers are in phase.

It is no different than feeding two eight-ohm speakers from separate 100W
amplifiers, and the results are the same.

Discussion of audio amplifier power in home systems always prompts me to
relate this: I worked for a guy who was formerly a projectionist at Radio
City Music Hall in New York. He told me the sound system used amplifiers
rated at 70 watts per channel. That's a 6,000-seat theater.

He worked there a long time ago, so this not a claim of what they use today.
Use for perspective only, please.

"Sal"

Some of the early amps were smaller. I remember a discussion about a movie
coming in that suggested higher power. Those speakers were typically at
least 100 times more power efficient than average home speakers, or 10 dB
spl. Many were altec a7's.

Greg