Would I affect SQ much if I were to run a pair of 9" drivers between 45 and 350hz in a mono configuration?

yes, it is gererally accpeted by most that frequncies above 100-150 should be ran in stereo(l&r) and not in mono

unless you are putting them side by side in the middle of the dash, go with a stereo output.

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Strongly agree with Defro

I'll expand on this....

With them far appart, you will want to run them in stereo. If you bring them within a 2 feet of each other with those frequencies, you will start to hear the affects of Intermodulation Distortion. It is better to run drivers that are side by side covering the same frequencies in Mono.

As Defro mentioned, frequencies above 100hz are very easy to localize. If your goal is to colapse the soundstage and make the music sound like it's coming from where-ever you have your speakers mounted; run mono.

BTW, I've actually played with this, and it's not the way to go.

Running 2 subs below 60hz in stereo is a whole other thing...but we'll leave that one alone.

Adam

care to elaborate on this?

regards, Mark

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does this apply to a 4 channel amp being bridged to 2 channels (left and right) as well? or are we talking strictly mono as in one channel for left and right?

ya i would keep them close by ir else it would sound wierd

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mono up to 350Hz will cover most of the male voice and much of the female voice range. The 'spittyness', deep breaths, and 'sibilance' would still be in stereo but the actual locations of many instruments (tuba, human voice, bass, some piano, some drum etc ) would be confusing as the lower registers pull to the mono channel and the HF pull to the tweeters. The tonality might be OK but the locations would be inaccurate.

I tried it, it didnt work... and yes I will try it again but not up to 350 Hz

^^^ i totally agree! there are many other instruments as well (such as guitars of various kinds and so forth) that use this range to! so if you are to place these sounds in mono how with the instument find its proper place on the sound stage?

as far as sub base, 60hz and down just consists of sub sonics witch are omni-directional (meaning the souce could be any where in the room but it will sound the same) we all know that certain systems like loading sound off of walls and what not affects the amplitude in certain ranges and what have u but the general concenses is the above.

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