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need help finding the right amp for some subs

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Old Apr 2, 2007 | 12:26 AM
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Default need help finding the right amp for some subs

this isnt for me, its for a buddy i just sold my old subs to.
he has 2 kicker compvr 12's (4 ohms), and needs to figure out what amps to get. he went out and bought 2 kicker zx300.1 amps, the store (small reputable audio store) told him that they would do be fine with the setup. now someone else is saying that the amps wont power the subs enough, and that they are completely wrong for the setup.

opinions/suggestions?
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Old Apr 2, 2007 | 12:38 AM
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You could give them more power, but there is nothing "wrong" with what they are getting... Not sure how someone could say that setup is "completely wrong"...it's not the subs will be getting so little power that they wont even begin to perform or anything like that..
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Old Apr 2, 2007 | 02:34 AM
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Originally Posted by stevethepirate
this isnt for me, its for a buddy i just sold my old subs to.
he has 2 kicker compvr 12's (4 ohms), and needs to figure out what amps to get. he went out and bought 2 kicker zx300.1 amps, the store (small reputable audio store) told him that they would do be fine with the setup. now someone else is saying that the amps wont power the subs enough, and that they are completely wrong for the setup.

opinions/suggestions?
It depends on how much green he wants to spend on the amp?
All he need is one bad *** amp not two.
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Old Apr 2, 2007 | 03:33 AM
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The subs are rated at 400w RMS and the amp is rated at 300w RMS @ 2ohms.
He should be fine as long as they are in the right airspace.
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Old Apr 2, 2007 | 12:02 PM
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is it a problem that he is using 2 amps?
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Old Apr 2, 2007 | 12:13 PM
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Originally Posted by stevethepirate
is it a problem that he is using 2 amps?
no....just most people wouldn't use 2 separate mono amps because it's costly -- also you said he "went out and bought", which makes me fear how much he paid for them...

EDIT: he does have an aftermarket HU, right? there will most likely be issues with controlling the subs completely as far as pre-outs go on the amps -- as there is most likely only one non-fading preout. -hecould always simply split the pre-amp output which would not be a big deal (pre out voltages of 3.5V or greater would be desireable since there would be a voltage drop due to internal resistances, but nothing significant).

Last edited by fredmr39; Apr 2, 2007 at 12:25 PM.
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Old Apr 2, 2007 | 03:31 PM
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he said he got the 2 smaller amps because it cost less than one big one (the shop was doing a buy one get one free on amps apparently.. which is insane)
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Old Apr 2, 2007 | 03:44 PM
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Originally Posted by stevethepirate
he said he got the 2 smaller amps because it cost less than one big one (the shop was doing a buy one get one free on amps apparently.. which is insane)
well....depends what they charged him for one..but I'm assuming it was less than $250 - which does make that a great deal.
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Old Apr 2, 2007 | 09:28 PM
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this is what the guy is saying...

"Because you have TWO 4 ohm subwoofers. If you were to wire them each to their own ZX300.1, you would get 150WRMS to each. Do you see why? Because the ZX300.1 is rated to output 300WRMS@ 2ohms. You have a 4 ohm subwoofer on each.

If you wire your subs together in parallel (like in the pic I posted), and you use the formula in the modifications encyc, you get a final load of 2 ohms on an amp. SOOOO now you find an amp that does roughly 800WRMS x 1 channel @ 2ohms. Power handling of your subs is always highly dependant on the box they are in. Odds are great you'll be using a simple smaller sized sealed box. You could most likely over power them a bit without issues. So don't ruin yourself looking for an amp that does EXACTLY 800W.

As previously mentioned, you need to be looking at the RMS power out. Not peak or max ratings."
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Old Apr 2, 2007 | 10:53 PM
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But those subs have dual voice coils so you just need to wire the voice-coils on each sub in parallel with same-sub voice coils..........

Guy doesn't know DVC subs I guess...
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Old Apr 2, 2007 | 11:28 PM
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sweet. thanks.
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Old Apr 2, 2007 | 11:59 PM
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Originally Posted by fredmr39
But those subs have dual voice coils so you just need to wire the voice-coils on each sub in parallel with same-sub voice coils..........

Guy doesn't know DVC subs I guess...

You are starting to sound like the guys at Honda-Tech.com. Lose the attitude.
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Old Apr 3, 2007 | 01:13 AM
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Originally Posted by 02TransAm/Batmobile
You are starting to sound like the guys at Honda-Tech.com. Lose the attitude.
Personally, I don't think there was any attitude... if someone is going to point out to someone else and tell them their setup is "completely wrong" without knowing the facts - they need to be told so (keep in mind we don't even know who we are talking about and who was giving the wrong advice)....nowhere did I say "what a dumbass" or "don't listen to this guy" or "this guy doesn't know ****" - and maybe he doesn't know DVC subs (or maybe doesn't know these are even for some reason) - if that's the case even, what is wrong in telling him so?

EDIT: I'm not going to continue this "dispute".

Last edited by fredmr39; Apr 3, 2007 at 01:58 AM.
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Old Apr 3, 2007 | 01:32 AM
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actually, the guy just acknowledged the fact that he was thinking that they were SVC's for some reason.

so... dont ever compare an fbody owner to someone from honda-tech.
lol.

thanks for the help, fredmr.
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