Which amp is best? - AVS Forum
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post #1 of 7 Old 11-23-2012, 04:43 PM - Thread Starter
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Hello,

I have my whole house wired for sound (about 8 pairs of speakers throughout the house). I have a receiver hooked up to two of these sets, but was told it would be a fire hazard if I tried to stack more into any of the inputs and needed an amp. I'm looking to do this as cheaply as possible. Do you have any suggestions on amp options?

Thanks!
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post #2 of 7 Old 12-06-2012, 06:28 PM - Thread Starter
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Can I use a speaker selector for this? Any recommended brands?
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post #3 of 7 Old 12-06-2012, 09:39 PM
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Sure. Niles makes impedance-matching speaker selectors up to 10 pair in a single unit.

The cheapest way would be to connect them in series/parallel combinations that are close to the nominal recommended impedance for your receiver. They'd all be on at the same time though that way.

Just because there is a knob doesn't mean you should turn it.
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post #4 of 7 Old 12-24-2012, 08:40 AM - Thread Starter
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post #5 of 7 Old 12-24-2012, 08:46 AM
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It appears that it does some low impedance protection which is certainly better than not, but less efficient than the impedance matching/autoformer type.

Just because there is a knob doesn't mean you should turn it.
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post #6 of 7 Old 12-24-2012, 09:08 AM - Thread Starter
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Forgive me but I'm a complete newbie on this stuff! What exactly is impedence protection and why do I need it?
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post #7 of 7 Old 12-24-2012, 10:49 AM
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Keeps the load of the connected speakers within the acceptable range of the amp, typ. 4 ohms or higher. Without it, you risk the amp seeing too low of impedance which, best case, the amp gets hot and shuts down. Worst case, it gets hot, is damaged as a result, and goes to the scrap heap.

Just because there is a knob doesn't mean you should turn it.
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