Fresh Stereo Install

Sycobob · 07-03-2015, 07:04 PM

I do have one question, if any of you more knowledgeable fellows can help. The amp specs are listed as

Quote:

40 W x 4 / 300W x 1 (4Ω)
50 W x 4 / 500W x 1 (2Ω)
100 W x 2 / 300W x 1 Bridged (4Ω)

and I'm not sure what impedance values are supported for the subwoofer when the other channels are bridged. 300 W is the 4Ω power, and it just has a blanket (4Ω), which I assume means all speakers. However, Crutchfield has
100 watts RMS x 2 bridged at 4 ohms + 500 watts RMS x 1 at 2 ohms listed as a supported mode. When I chatted with some there they said the sub impedance is independent of whether the other channels were bridged. I can't find anything definitive to back this up though. In the manual, it does have this bit

Quote:

5SPEAKER OUTPUT terminals

:Stereo connections
When you wish to use the unit as a stereo amplifier, stereo connections are used. The speakers to be connected should have an impedance of 2Ω or greater. When multiple speakers are to be connected, ensure that the combined impedance is 2Ω or greater for each channel.

:Bridged connections
When you wish to use the unit as a high-output amplifier, bridged connections are used. The speakers to be connected should have an impedance of 4Ω or greater. When multiple speakers are to be connected, ensure that the combined impedance is 4Ω or greater.

SPEAKER OUTPUT terminals (SUB)
As this unit accepts speakers with a minimum impedance of 2 ohms, connect speakers with 2-ohm or higher impedance to these terminals.

This does kind of sounds like the sub is indeed independent of the everything else, I'm just not sure. I have the sub running at 2Ω right now. I had it blasting recently and I started to smell electronics and the amp was nearly too hot to touch so I immediately turned it off and have been running it much lower since then. That seems fairly conclusive that 2Ω isn't supported, right?

How does this normally work for amps?

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