From 1 to 4 ohms...

[ArrizX 10+ year member]

Ok, Just for fun i'm going to put my 7515 mtx 04 in my car today. ill be using a rockford fosgate p1000-1bd. its benched at about 500 @ 4.

my question is this, I was running two tc-7's @ 1 doing 1300wrms. My lights dim bad with it 20+ on alpine hu.

So, my question is this..

If im only pulling 500wrms, but at a higher impedance, will my lights still dim? its not as many watts, but its harder to get the watts due to the 4ohms.

will be be harder or easier on my eletrical?

Click to read more...

 

[hardhitta47 10+ year member]

your lights may dim a little, but not much if at all. i wouldn't say it's "harder" to make power at 4 Ohms...i think it's harder on the amp to make power at lower impedance, because it requires more current.

 

[KCha 10+ year member]

4 is more efficient in general...should be quite a bit of a difference just going from 1300 to 500 anyway.

 

[Punk In Drublic 10+ year member]

When I dropped to 1200 on 1ohm for 2 type R's to 450 @ 4ohms with my new JL, my light dimming went away totally.

 

[southwest713 10+ year member]

yea its better for the amp at 4ohms, should not run as hot either. and since its drawing less current, less dimming will occur.