In my suv I am going to have only two component speakers (both up front). At first I was going to get the 4 channel infinity amp (so it matches my sub amp) but I realized never will I use more than two channels. So I was looking at a two channel amp which is $70 cheaper. I want the cheaper amp but I read that it has a frequency response of 10-69khz and the more expensive amp has a 10-100khz frequency response. On average, would I be missing any important frequencys on songs? Would there be a noticable difference if I did not have these frequencies?

 

if you were a bat, dog or some other animal with super hearing. Unfortunately us humans, particularly adults, have a hard time hearing anything over about 18 khz(18000 hz), so basically any amp that has pretty flat response(+/- 3dB) up to or beyond 20 khz should be fine. If your two channel is good to 69 khz, then you are more than o.k. Hope that helps you save some money.

 

Yes, it does. Thank you very much.

 

Do I understand that you will have 2 pairs of component spearkers or only one pair:
If you have 2 pairs, that means 2 sets of 2 woofers + 2 tweeters = 4 woofers and 4 tweeters, then yes, get the infinity 4 channel.
Even with only 2 pair, you can get the 4 channle amp and run the mids and highs separately. Or just be prepared for a future upgrade to electronic crossovers that are built in to many head units such as Alpine or Clarion or othes.