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For a given output voltage, let's say a DAC outputs a 2nd order harmonic -60 dB down from the fundamental. If that DAC is connected to an amplifier that also has 2nd order harmonic distortion at -60 dB, what is the result? I'm guessing that if the 2nd order harmonic is of the same phase, the...

nightfishing, thanks for the input. My description was a little simplified. The amp is external, and connected to multiple sub drivers. I think in my case the amp just doesn't deliver enough power for the input voltage when connected to multiple drivers like it is. I forget what the impedance is...

I appreciate all the suggestions. It looks like I have some good options. Thanks!

Thanks SIY. I can solder and follow a schematic, but I'm not sure which opamp to use or which schematic to follow :). I'd be up for building my own if it's a lot cheaper, but would also like to save time by buying something. When I search, I seem to just find phono preamps or preamps that seem...

I have a budget system with a receiver, two mains, and a subwoofer connected to the sub out on the receiver. The subwoofer's volume is too low, even with it's own gain maxed. The subwoofer can play plenty loud if I increase the overall system volume, but the relative volume is too low. What's a...

I've mostly seen DIY full range dipoles, but here is a commercial offering with dipole bass from Jamo: https://www.jamo.com/products/r909 In my particular case, I already have a full range DIY dipole working in my apartment. I think this building would be considered lightweight construction...

I've read that a dipole is a velocity source, not a pressure source. Does this mean the room is pressurized less with a dipole than when using a monopole source for bass? I would imagine a less pressurized room would transmit less sound to neighboring rooms, am I correct?