wiring different impedances

[MemphisCherokee 10+ year member]

So i currently have 2 single coil 4 ohm memphis pr's and and soon ill be acquiring 2 more, except, they are dual 4 and i cant seem to figure out the load they'd be putting on the amp.

wouldnt it essentially be like 6 single 4's?

i would have to keep it at least 2 ohms because that's all that the memphis MCD-500 is rated at (unless you guys have proved otherwise)

what should i do

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[JimJ 5,000+ posts]

I wouldn't mix SVC 4 ohm and DVC 4 ohm drivers.

 

[audioarsonal 10+ year member]

I think that would be 1.33 in series and .67 in parrel

 

[jco1385 5,000+ posts]

wire the 2 single 4s together for 2ohms and then wire the dual 4s down to 2 ohms?? i dunno... would that still be 2 at the amp?

 

[audioarsonal 10+ year member]

NO.He is getting 2 DVC as well as the 2 SVC he has.They can be wired as 3 4 ohm DVC subs.

 

[jco1385 5,000+ posts]

then that'd be a no go. just run the 2 dvc's IMO

edit: that's put you at 1ohm tho

 

[audioarsonal 10+ year member]

I think if you wire them all up in series for 1.33 you might be able to get away with it.I have ran amps that were 2ohm stable down to 1 and didn't have problems.I did get alittle hot though.

 

[jco1385 5,000+ posts]

I think if you wire them all up in series for 1.33 you might be able to get away with it.I have ran amps that were 2ohm stable down to 1 and didn't have problems.I did get alittle hot though.

it is not recommended to do this....you could be buying a new amp if you do.

 

[MemphisCherokee 10+ year member]

i dont know how much of a problem the amp would be, the gain is set little to none

ive got a pre-amp giving it around 8v and the gain way down so i think i may be safe

 

[audioarsonal 10+ year member]

If he has the unit properly fused that will protect the amplifier.But it is a risk.

 

[JimJ 5,000+ posts]

It's a bad idea regardless of whether or not the amp will work with it.

 

[MemphisCherokee 10+ year member]

i checked the rockford fosgate wiring wizard for 6 svc and i came up with either .67 in parallell or 24 in series.

i checked it as 3 DVCs and it came up with 2.67 ohms

idk, maybe ill hawk the dvcs and buy more svcs

the original svcs are kinda fawked from surround damage.

only reason im even considering getting these is because theyre gonna be hella cheap

 

[94Mazda626 10+ year member]

Either way the dvc subs will be getting either half or double the power that the SVC would be getting. If you could at least a set of SVC 4ohm subs would have been a much better choice or failing that DVC 2 ohms and wire them in series for a 4 ohm load

 

[MemphisCherokee 10+ year member]

hmmm, ill figure something out

 

[jmanpc 5,000+ posts]

It's a bad idea regardless of whether or not the amp will work with it.

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mixing impedances = fail