Quote:
Originally Posted by JonStoltz
So you're saying if u can't match the power and resistance of the speakers, the best way to do it with one 4 channel amp is get a pair of 4x6" rated 100 watt @ 4 ohms" and a pair of 6x9" rated 200 watt @ 2 ohms for example.
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I may be misunderstanding what you're trying to say, but my point in that post is that it's better to match speakers to an amp than matching amps to a speaker. If you end up with 3 amps, it's going to take up space, it's going to be a hassle to have distribution blocks and all that good mess (and that's if you do it right, imagine those that simply run wire to the battery. That's not efficient at all).
I think to be honest, I was really saying that the original poster messed up by buying things as he went along instead of planning it out but to remedy what happened was by finding an amp that is similar in ratings.
As far as what you're trying to say, IF your amp puts out 80 watts x 4 @ 4ohms but can handle 2ohms x 4 and has a rating of 140 at that ohm load and you buy speakers accordingly, then yes that's the best solution UNLESS you're comfortable with distribution blocks and have the space to mount different amps in a location where they have air to cool off. Otherwise, the solution is getting a 4 channel amp and purchase speakers accordingly.
For example, I'm restoring a Cutlass Supreme. Right now it's a drivable project (meaning it's not done, yet I still drive it around), but I plan on doing a 4 or 6 channel sound system. I know what I want so I bought the speakers and put them in, powered by the radio ALTHOUGH I will be powering with an amp in due time. Because I know this, I looked around for an amp. I know it's a lot easier to get an amp with a rating of 100 watts x 4 @ 4 ohms , so I bought Alpine type R's in those specs. I got a good deal on em, and now I just have to finish what I'm doing before the install.
If I was in Negolien's situation, I would try to overpower the 6x9's by no more than 25 watts and I would set the gain on each channel appropriately. Usually, from what I've seen, channels 1 and 2 are considered one set and 3 and 4 are another and can be adjusted accordingly.
I chose the 6x9's over the 4x6's because the 6x9's are usually made to handle more than the 4x6's due to it's smaller cone size.
EDIT: I should mention that you need to make sure that the amps are stable at more than one type of ohm. Some can't handle 2ohms and some can't handle 8ohm, although they are rare. Never wire to 1ohm unless the amp can handle it.