can you bridge a 4 channel amp

[audioholic 5,000+ posts]

Well, they do make full-range class D amps these days (up to 20khz). Im not aware of any car audio amplifiers that are Class D that aren't mono, unless they are full range. So Im confused why this topic is even an issue. Does someone here have a 2-channel class D subwoofer amplifier?

And if you understand what bridging is, you'd know it wont artificially color the sound of your speakers. Bridging simply means half the load of the mono channel is divided between each channel of the amplifier. So if you bridge an amp to a 4ohm mono load, each channel is seeing 2ohms and giving output accordingly. This means 'bridging' is to the amplifier exactly the same thing as simply running it non-bridged, but at the lower impedance. Will running speakers at their natural impedance, rather than wired in parallel or series, make them sound 'harsh'? Of course not. Hence, neither will running the amp bridged.

 

[Xprime4 10+ year member]

Well, they do make full-range class D amps these days (up to 20khz). Im not aware of any car audio amplifiers that are Class D that aren't mono, unless they are full range. So Im confused why this topic is even an issue. Does someone here have a 2-channel class D subwoofer amplifier?
And if you understand what bridging is, you'd know it wont artificially color the sound of your speakers. Bridging simply means half the load of the mono channel is divided between each channel of the amplifier. So if you bridge an amp to a 4ohm mono load, each channel is seeing 2ohms and giving output accordingly. This means 'bridging' is to the amplifier exactly the same thing as simply running it non-bridged, but at the lower impedance. Will running speakers at their natural impedance, rather than wired in parallel or series, make them sound 'harsh'? Of course not. Hence, neither will running the amp bridged.

But there is a difference at low/high volume. I'm pretty sure it's not a placebo it does sound sharper with a lot of headroom even at low volume. The same exact song was sounding different when i was in the process of bridging one side then comparing.

As for harsher, clipping might be a cause here at high level. The headroom is always nice since you can get louder without bringing distortion and harsh feeling to the speakers