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Re: In theory...(lots more) (archive)

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Posted by MikeinNH on April 02, 1999 at 19:29:44:

In Reply to: In theory...(lots more) posted by DC on April 02, 1999 at 17:41:09:

: I've seen 16 speakers hooked up to a 2 channel amp.

: Tweeter, Midrange and mid-bass in each corner and 4 subs. Rockford Fosgate used to push this type of setup all the time. All you need is a 2 channel amp that is 2 ohm stable. Each speaker has it's own passive crossover (band pass crossovers for the midrange and the mid-bass speakers) and the amp never sees less than 2 0hms.

: How can this be if all the speakers are 4 ohms? Well, remember that even if you wire a woofer, mid-bass, midrange and tweeter together in parallel, if they are all reproducing different frequencies with NO overlap then the amp only sees 4 ohms at ANY PARTICULAR FREQUENCY. So, wiring all 16 speakers together yielded a 2 ohm load at any frequency.

: How does it sound? Not too bad actually. However!!! Here is what they don't tell you.

: If you wire the rear speakers and the sub together you will lose the ability to alter the output level of one without also altering the output level of the other. In other words...if you crank the volume up to hear the subs, you might overdrive the rear speakers. Rockford pushed the 16 speakers of one amp thing because They made more money off speakers than off amps. Sony is mentioning it because it makes their amps SEEM better, not becausethey actually are better.

Thanks, as usual - I appreciate the insight...I didn't say Sony was "better", but I think they're pretty darn good. I realized you wouldn't be able to control the sub gain seperately - and If I did this, I'd have quality rear 4" speakers, either a/d/s or BA, so I don't think I'd overdrive them with 50 watts.


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