OHm's and amp/sub question

cornilion · Post by **cornilion** » Mon Mar 10, 2008 2:52 am

i have the QX500.1d and 2 octane-r subs sincgle voice coil.

now im wondering since the amp says 500watts at 2ohm@14.4 VDC (w/e that means

)

i wonder if i put the 2 subs if the amp will be pushing 500watts rms or wil be it pushing 75/275x1 into 4ohm like my manual ays.. i hope not becuase il be realy sad to have 2 big subs only hitting 250rms into both subs(N)(N) my room subs are fucking 220rms for god sec hahahahaha

anyways any help will be appreciated.

fordtough1 · Post by **fordtough1** » Mon Mar 10, 2008 2:57 am

Yes, it will be pushing 500 watts, or 250 per sub. Two 4 ohm subs wired in parallel will present a 2 ohm load to the amp.

cornilion · Post by **cornilion** » Mon Mar 10, 2008 1:45 pm

fordtough1 wrote:Yes, it will be pushing 500 watts, or 250 per sub. Two 4 ohm subs wired in parallel will present a 2 ohm load to the amp.

thnx il have to tell that to future shop cz i odnt wan them setting it up at 275 split to the subs.

:(

Post by **Bfowler** » Mon Mar 10, 2008 1:56 pm

so one thing to realize is that the subs ohms don't change, so its not a setting on the amp or anything.

the subs ARE 4ohm subs each. when wired in parallel, you use the formula 4(their ohms) over the number of drivers (2) to give you 2ohms total.

the could also wire them in series in which you add their ohms (4+4=8ohms) which would give you about 1/2 the power of the 4ohm rating. (in general you roughly double the power rating every time you half the ohm)

so any even remotely decent shop should know to wire those up parallel on an amp that's 2ohm stable

cornilion · Post by **cornilion** » Mon Mar 10, 2008 4:15 pm

Bfowler wrote:so one thing to realize is that the subs ohms don't change, so its not a setting on the amp or anything.

the subs ARE 4ohm subs each. when wired in parallel, you use the formula 4(their ohms) over the number of drivers (2) to give you 2ohms total.

the could also wire them in series in which you add their ohms (4+4=8ohms) which would give you about 1/2 the power of the 4ohm rating. (in general you roughly double the power rating every time you half the ohm)

so any even remotely decent shop should know to wire those up parallel on an amp that's 2ohm stable

ya thnx alot for replying.. i ust came back and thats exactly what the guys doig hes parralel them. he has a QX900.1 himself so he know show it works hahaha thank god lol

so im like "closing" this thread. so no on needs to answer back thnx

this forum rox!