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Old 06-14-2006, 03:29 PM   #1 (permalink)
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What amp for 4 Kappas?

I have Infinty Kappa 3.5" in the rear and 4" in the front my my 89 MR2. My Pioneer DEH-P8600MP headunit puts out 22w RMS (so it says). They sound decent... but I'd like them to sound as good as they can!

What amp would you recommend for ths application?
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Old 06-14-2006, 03:49 PM   #2 (permalink)
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Quote:
Originally Posted by aaron7
I have Infinty Kappa 3.5" in the rear and 4" in the front my my 89 MR2. My Pioneer DEH-P8600MP headunit puts out 22w RMS (so it says). They sound decent... but I'd like them to sound as good as they can!

What amp would you recommend for ths application?
Why not hook up that *new* Targa you got? Hook it up to one pair or the other, then find a comparable amp for the other pair.
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Old 06-14-2006, 03:57 PM   #3 (permalink)
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Really you could use any 4 channel and probably get better sound.. it doesnt really even need to be a spectacular amp. I have a MTX 564, didnt cost much and puts out good power. Can get one on ebay for about 200. Other than that, Just look around.. there are alot of 4 channels to choose from, and you won't need alot of power. Look at camx2's list of quality amps and start looking into some of them for a decent powered one.
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Old 06-14-2006, 04:04 PM   #4 (permalink)
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O btw not to steal this thread but I don't really wanna open a whole new thread just to ask this. But what would I be putting to my speakers with this amp

MTX 564
RMS POWER MEASURED AT 12.5 V DC:

45W X 4 INTO A 4 OHM LOAD WITH LESS THAN 0.3% THD+N

90W X 4 INTO A 2 OHM LOAD WITH LESS THAN .3% THD+N

180W X 2 BRIDGED INTO A 4 OHM LOAD WITH LESS THAN .3% THD+N



DYNAMIC POWER MEAUSRED AT 14.4 V DC:

70W X 4 – 4 OHM LOAD

140W X 4 – 2 OHM LOAD

280W X 2 – BRIDGED INTO 4 OHM LOAD

And my speakers are 4 ohm. I have two channels to components, and the other two to 6x9's in the back.

Im not sure what it is running at but I'm assuming its the 45x4 range. Am I right, or does that present a 2 ohm load? never did figure that out. And if that is the case, how do you ever get to a 2 ohm load? Aren't nearly all speakers 4ohms?

Thx for anyone who helps me out with this question. I think I'm just gonna put this into a thread anyways
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Old 06-14-2006, 04:20 PM   #5 (permalink)
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With the engine off, you're getting the lower numbers, with the engine on, you're getting the higher numbers. Assuming each speaker has its own channel, yes, they're all running at a 4 ohm load. To get a two ohm load, you have to wire them differently. But by doing this youre probably going to lose some type of processing (fading or balancing, depends on how you wire them, though you would probably just lose balancing because you would want to wire fronts with fronts and rears with rears to present equal loads).

However, since you do have four channels, you could ditch the rears (not much of a difference noticable anyway (to me)), and wire the comps active giving each tweeter and mid its' own channel.

Wiring Guide - Even though its used mainly for subs, you can get the same results for your regualr speakers. I had a friend who had wired his speakers down to two ohms so he could run four speakers off a two channel amp.
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Old 06-14-2006, 04:26 PM   #6 (permalink)
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Quote:
Originally Posted by Delay_FTB
Why not hook up that *new* Targa you got? Hook it up to one pair or the other, then find a comparable amp for the other pair.

Serious? I don't want to hook something that old up to these speakers...


As for
Quote:
Really you could use any 4 channel
... no, you can't, unless you want to blow things. You have to look at the distortion numbers as well as the signal to noise numbers.
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Old 06-14-2006, 04:39 PM   #7 (permalink)
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Quote:
Originally Posted by aaron7
Serious? I don't want to hook something that old up to these speakers...


As for ... no, you can't, unless you want to blow things. You have to look at the distortion numbers as well as the signal to noise numbers.
Age ain't nothin' but a number...seriously though, amps don't have an expiration date. Bench test it to see if still works, and if it does, I don't see a problem with hooking it up provided it is powerful enough.

And realistically, most amps any more have about the same numbers like that. And most of the time, aren't that notciable until you get down to "golden ear" status and fine tuning.

I assume your speakers are somewhere withing the power handling ranges that you posted for your amp. However, if you wanna get some specs (RMS wattage) we can probably find some suitable amps.

Something like this JBL might work for you.
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Old 06-14-2006, 04:50 PM   #8 (permalink)
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The speakers are:

3.5" : 2-35w RMS 105w peak
4" : 2-50w RMS 150w peak
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Old 06-14-2006, 05:00 PM   #9 (permalink)
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Quote:
Originally Posted by aaron7
The speakers are:

3.5" : 2-35w RMS 105w peak
4" : 2-50w RMS 150w peak
Ok so maybe this amp is a little more withing power specs.
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Old 06-14-2006, 05:11 PM   #10 (permalink)
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When I said any amp.. I meant something along your power range. I wasn't meaning that for every amp, bviously you need something small, but I meant more along the lines of a the brand. Just find something of decent quality with a good amount of power and you should be fine.
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Old 06-14-2006, 05:16 PM   #11 (permalink)
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Quote:
Originally Posted by Delay_FTB
With the engine off, you're getting the lower numbers, with the engine on, you're getting the higher numbers. Assuming each speaker has its own channel, yes, they're all running at a 4 ohm load. To get a two ohm load, you have to wire them differently. But by doing this youre probably going to lose some type of processing (fading or balancing, depends on how you wire them, though you would probably just lose balancing because you would want to wire fronts with fronts and rears with rears to present equal loads).

However, since you do have four channels, you could ditch the rears (not much of a difference noticable anyway (to me)), and wire the comps active giving each tweeter and mid its' own channel.

Wiring Guide - Even though its used mainly for subs, you can get the same results for your regualr speakers. I had a friend who had wired his speakers down to two ohms so he could run four speakers off a two channel amp.

well ya I know all about the voltage things. It will produce more power given the amp has the voltage. But the way my system is set up is. One channel to components with a crossover. Another to the same thign on the other side. And the other two channels seperate to the 6x9's.

I also realize that I could set up an active way. But I'm not sure if im knowledgable enough to tune it properly. I do have a headunit that has crossover setting and things to so I *CAN* do it, I just dont know if ill be able to. You know what I'm saying?

oo and now I kinda understand with the ohm thing. Its just like a sub setup. Gotcha
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Old 06-14-2006, 05:20 PM   #12 (permalink)
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Quote:
Originally Posted by Corollacrazy42
well ya I know all about the voltage things. It will produce more power given the amp has the voltage. But the way my system is set up is. One channel to components with a crossover. Another to the same thign on the other side. And the other two channels seperate to the 6x9's.

I also realize that I could set up an active way. But I'm not sure if im knowledgable enough to tune it properly. I do have a headunit that has crossover setting and things to so I *CAN* do it, I just dont know if ill be able to. You know what I'm saying?

oo and now I kinda understand with the ohm thing. Its just like a sub setup. Gotcha
I feel ya. Honestly, I have no idea how to tune "properly", but I just go with what sounds good to my ears. xover slopes and eqing don't mean shit if it sounds like ass.
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Old 06-14-2006, 05:22 PM   #13 (permalink)
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Quote:
Originally Posted by Delay_FTB
I feel ya. Honestly, I have no idea how to tune "properly", but I just go with what sounds good to my ears. xover slopes and eqing don't mean shit if it sounds like ass.
Well good deal, I thought I was the only one here that knew nothing of all this xover, and eq's and stuff.. I usually just mess around with it till I like it
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