i have one dual voice coil 4 ohm sub. i wired it to 2 ohm. i checked the resistance with a DMM and the read out i got was 2.5 ohms. is this normal?

also when setting my gain should i use the formula 500 watts x 2 ohm = sqrt (1000) = 31.62

or should i do 500 watts x 2.5 ohm???

What does each set of coils measure out to?

What does each set of coils measure out to?

one reads 4.5 and the other 4.4

retest.

First, touch probes together and see what they read then subtract that from what the coils read.

retest.

First, touch probes together and see what they read then subtract that from what the coils read.

I retested each coil this morning. i touched the probes together and i got .1ohm. one read 4.1 ohm which is perfect and the other was reading 4.2, i guess thats ok?

odd...

I've never seen actual resistance measure nominal resistance.

But even at that reading, wired in parallel should be 2.0-2.1, not 2.5.

What size wire u usin?

Try a minimum of 10 awg wire and try to keep the run no longer than 6ft and see if that helps.

somehow my friends 2 single 4 ohm subs measured out to 6.3 ohms lol

that's only normal if they are both wired in series

odd...

I've never seen actual resistance measure nominal resistance.

But even at that reading, wired in parallel should be 2.0-2.1, not 2.5.

What size wire u usin?

Try a minimum of 10 awg wire and try to keep the run no longer than 6ft and see if that helps.

I'm using 12 gauge wire. ii just retested with the coils wired in parallel and im getting exactly 2.0ohm. i dont know why it was reading 2.5 before but things seem fine now.

thanks for the help