Originally Posted by rdgrimes
Depends on the amp design and I don't know specifics on that one. But it does usually sum the noise and distortion from both channels. On many amps with single power supplies, simply using one channel gives you more headroom than using both. You'll need to read up on the specifics of that amp, but there's certainly no particular gain to be had by going with more than 300W. Been there, done that and it adds almost nothing except at ear bleeding levels. You also want to consider the rating for the speakers you have. General rule would be to use 2x the rated RMS power input on the speaker. That presumes a careful user and good quality source material.
From the reviews I have read on using the Crown XLS amps in a home setting (the main one done by Andrew Robinson here
) is that their 1500 and above models (103dB signal to noise ratio) running mono per speaker is fantastic sounding. Here is a link to the specifications of these amps.
Remember, if you look at the specs, look at the 1500 model specs and disregard the 1000 model specs as they are lesser (97dB signal to noise ratio vs. 103dB of the 1500, etc).
The JBL 3677's are rated for 250w RMS. Do I need the power that each Crown can put out @ 8ohms in bridged mode? No, definitely not. But for the price of these and the reviews of their performance in the home setting I definitely couldn't help myself either.
Also, as N8DOGG said, I would think (and from what I believe I have learned from AVS over the years on the topic of amplifiers), the more power each channel has in terms of headroom, the less distortion and chance of clipping their is, allowing for a more "open" soundstage if you will. Also, the additional power from Mono (or bridged mode) would allow someone to keep the amplifier gain setting (which the Crown amplifiers have) lower than if running Stereo mode, thereby further eliminating distortion and headroom issues (the amp can supply more power with less gain used). But I know I am not always right, so please correct me if I am mistaken.Edited by BigCoolJesus - 12/27/13 at 8:02pm