Is it bad to wire subs like this?

[Bass911 10+ year member]

This guy wants me to build him a box for 3 Memphis PR 10's. This is the problem, I think? He sent one in for repair and they sent him a dual 4 instead of a single 4. Now he has 2 single 4's and one dual 4. How would you wire all 3 subs together to an one ohm stable mono block amp or is this a bad idea?

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[bhsdriller 10+ year member]

I don't think you can

 

[lostdaytomorrow 10+ year member]

You can wire it down to around 1 ohm, but it's not a good idea, at all.

 

[k_schutte 10+ year member]

you can, it won't "hurt" anything but the D4 with be getting twice as much power as the S4's....

so if you have say 1000 watts RMS to work with then each S4 sub will be getting 250W rms and the D4 will be getting 500W rms....

 

[RAM_Designs 5,000+ posts]

you can, it won't "hurt" anything but the D4 with be getting twice as much power as the S4's....

This. You'll have some sort of power discrepancy depending on how you wire that D4 sub.

 

[Bass911 10+ year member]

So the dual 4 is going to see more power and there's no way around it? I guess he needs 3 300 watt 2 ohm stable d-class amps, right?

 

[Bass911 10+ year member]

Just thought about it and the 3 amp idea won't work.

 

[Alc5M 10+ year member]

you could do 2 amps, one that does 300 at 2 ohms, and one that does 600?

right? assuming you need 300 rms for each sub.

 

[cshaw 10+ year member]

lol send the sub back and get the right one????????????

 

[k_schutte 10+ year member]

lol send the sub back and get the right one????????????

Pretty Much!! LOL

O.P. I think you are looking at it wrong. Amps don't "see" subwoofers, they "see" coils. An amp will send equal amounts of power to each individual coil no matter how many subwoofers are involved and no matter what voicecoil configuration the subwoofers are. If you want them all to see about the same amount of power just get a 2-channel amp and wire the S4's together on oen channel an the D4 on the other channel...

Example, if you have a 2-channel amp that can do 600 rms @ 2ohm per channel then wire the S4's together on one channel and set the gains to 600 then wire the D4 to 2ohm on the other channel and set the gains to 300.... pretty simple really...