I have no issues with color scheme, thou i'd pick a bit stronger colors, but overall it's not bad effort for mom & pop made web site...
I have some additional critique:
Several left side navigation result change consistency of the layout and I feel it's annoying and confusing the eye.
Case in point:
"Products by Series" - has "white space" right above "Installer Photo Gallery"
then it's solid will we get to subwoofers - even bigger white space due to too much text on right...
Same for surround speakers.
"Volume controls" adds TONS on unnecessary white space

"Wood Finishes" - very nice finishes, too bad there are so many on single page to skew site layout again.
Speaking of "Installer Photo Gallery" - C'mon - in the microscope I could almost guess the impeccable level of work these guys did, but not every one has a microscope - PLEASE make these images bigger !!!
Regarding image compression - most annoying to me is this one:
Notice the white background - unclear and blurry details - this is due too high jpg compression
All these are minor issues and should relatively easy to fix