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3 amps, 3 subs, 3 ohms.


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thapimpfromchi 
Silver - Posts: 616
Silver spacespace
Joined: July 30, 2003
Location: United States
Posted: February 06, 2004 at 10:38 AM / IP Logged  
Hey guys, I'm thinking about getting myself 3 seperate amps, one for
each of my subs. I cant seem to find a 1000 watt amp at 4 ohms, for
cheap. I would much rather have the single amp, but I think i'm gonna
have to get the three. Well, amp I was looking at is the Polk/MOMO
500.1 Carbon series. The amp is a mono block amp, thats capable of
350W x 1 @ 4ohms, or 500W x 1 @ 2 ohms. The reason for the Subject
line, is because I have dual six ohm subs, so, when i wire them in
parallel, im going to get a 3 ohm load. I was just wondering if there
was a way to calculate how much power I'd get from the amp for each
sub, and if these amps would work. I am going to use these amps to
power 3 MA Audio 10" Dual 6 ohm subs. They handle 350 RMS, 700 Peak.
Thanks alot.
1990 Honda Civic HB:
Clarion DXZ545MP H.U.
2- 6.5" Power Acoustik interiors
Diamond Audio 600.1 amp
Diamond Audio 15" M6MKII
Pyramid PB881X 4 CH. Amp
mikep3 
Member - Posts: 26
Member spacespace
Joined: January 07, 2004
Posted: February 06, 2004 at 11:28 AM / IP Logged  

I would suggest that you get a nice class-D amp that can go down to 1 ohm. If you were to wire the coils in parallel and them wire the subs in parallel you would get 1 ohm. This would probably be cheaper as well since you wont need 3 amps and all the hassle of connecting more rca's. For you other question you would probably get about 425 watts out of that amp at 3 ohm's (about the middle between 350 and 500).

EzekialPhoenix 
Copper - Posts: 83
Copper spacespace
Joined: November 10, 2003
Location: United States
Posted: February 06, 2004 at 11:29 AM / IP Logged  
If you are going to spend the money to get three amps, why not get a jl audio 1000/1, which puts out equal power at 1.5-4 ohms.  That will be giving the speakers pretty much exactly the power they need, and probably will be cheaper than buying three separate amps.  As a bonus, it happens to be regarded as a very good amp. 
I be tossin and flossin, my style is awesome. Causin' more family feuds than Richard Dawson.
thapimpfromchi 
Silver - Posts: 616
Silver spacespace
Joined: July 30, 2003
Location: United States
Posted: February 06, 2004 at 11:44 AM / IP Logged  
I saw the 1000/1 amp, but that damn thing is 1000 dollars. I can get the polk amps and caps cheap through a friend who works at circuit city. I never thought of the class d amp idea though. Hmm...
1990 Honda Civic HB:
Clarion DXZ545MP H.U.
2- 6.5" Power Acoustik interiors
Diamond Audio 600.1 amp
Diamond Audio 15" M6MKII
Pyramid PB881X 4 CH. Amp
gregfocker77521 
Copper - Posts: 69
Copper spacespace
Joined: November 25, 2003
Location: United States
Posted: February 06, 2004 at 7:25 PM / IP Logged  

I selling a memphis 1000 that you can use for your 3 subs...I'm selling it cheap.

you would be getting aprox 365 watts to each sub when everything is wired at 1ohm

emait me for more info luissegovia@earthlink.net

forbidden 
Platinum - Posts: 5,352
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: November 01, 2003
Location: Alberta, Canada
Posted: February 06, 2004 at 8:48 PM / IP Logged  
Your best bet is to use one amp to power all 3 subs, you can run into all sorts of headaches if you try the one amp per sub route, things like space for mounting, extra money for wiring, proper crossover matching, proper gain setting, type of box used, differences in efficiencies of the amps, proper signal splitting on the rca input....... Find a good solid class D mono sub amp, spend the extra little bit on it, it will not dissappoint you.
Top Secret, I can tell you but then my wife will kill me.

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