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does it make any sense to run a 4 channel amp to 1 component set, to me seems like 1 component set should just need a 2 channel but i think the shop i was at was tryin to sucker me into getting a 4 channel amp

 
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"caps go with amps for current draw"

"speakers perform better with dynamat"

"component sets sound better bi-amped"

classic sales pitches. thats one of the first things i was taught when i got a job at an audio shop. you sell them an amp, you sell them a wire kit. you sell them a subwoofer, you sell them a box. you sell them speakers, you sell them trim rings, spacers, cups, and dynamat.

its all a sales technique to get you to spend more money.

more control over your component speakers? yes. better sounding? it can be, but so can running them off 2 channels, too. my component set runs off an active crossover. i have no choice but to bi-amp my set. yours i assume came with a passive crossover, there is no need to bi-amp, yet many higher end sets now come with the ability to do so. there is no real advantage, exept more attenuation control (that -3dB tweeter thing) but if you dont have problems with that, there is no need to run a 4 channel amp to your set.

 
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I have a 4 channel amp th front 2 channels are for my highs (tweeters and midrange through crossovers) and the other 2 channels are bridged for a sub. i am glad I had a four channel because before I had my sub I had the mids through channel b and the highs through channel a. I added to my system w/ out buying a new amp. If you are planning to expand your system you can't go wrong w/ a 4 channel. A lot of peopl will disagre because they want SPL but for our cars 1 10 I found was a good mix of bass and treble if the box is built right.

link to what I have

 
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Get a 2 channel amp dude! There is no need to bi-amp your speakers. The only reason I do with mine is to send more power to my mids then my tweets, because my tweets are mounted high. If you bought a 4 channel amp you will have to bridge it anyway, which may give you slightly less sound quality.

 
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my amp is only bridged on b channel there is no need to bridge a four channel amp for tweeters. origanally before my sub I had channel a hooked to 4 tweeters which is one pair per the front channel. and b channel had 4 midrange which also is one pair per each rear channel. So Fonto i don't understand why you say you would have to bridge it anyway, there is no reason to bridge.