Electrical for stetsom 7kd

[MmatsDude 10+ year member]

1ohms is good but .5 be careful. You'll be good at 2ohms with your electrical and expect about 2500w. At 1ohms you'll need to step up the electrical a bit battery wise. For 1ohms equal to 3 group 31batteries you'll be good.

wow man 2500 wrms @ 2ohms? i thought it put out 5krms + @ 2 Ohms?//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[dtbrown 10+ year member]

wow man 2500 wrms @ 2ohms? i thought it put out 5krms + @ 2 Ohms?//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Impedance rise is a biatch. After rise you'll be closer to 4ohms that's why. I say 2500w cuz that's it's 4ohms rating at 13.8v but 2500w is on the low side estimate. Really depends on how low your voltage goes and your impedance rise. If you keep the voltage in the 13's then more power for sure. But you won't see the 4500w 2 ohms 13.8v rating. Anywhere from 2500-4000 depending on impedance rise and voltage/battery.

98% of amps do about 20% less then rated power due to impedance rise and people not having enough battery unless the amp is hugely underrated. Most amp manufacture ratings are with a non reactive load unlike a speakers have a reactive load.

What subs you plan on running?

 

[MmatsDude 10+ year member]

Impedance rise is a biatch. After rise you'll be closer to 4ohms that's why. I say 2500w cuz that's it's 4ohms rating at 13.8v but 2500w is on the low side estimate. Really depends on how low your voltage goes and your impedance rise. If you keep the voltage in the 13's then more power for sure. But you won't see the 4500w 2 ohms 13.8v rating. Anywhere from 2500-4000 depending on impedance rise and voltage/battery.
98% of amps do about 20% less then rated power due to impedance rise and people not having enough battery unless the amp is hugely underrated. Most amp manufacture ratings are with a non reactive load unlike a speakers have a reactive load.

What subs you plan on running?

I see. Well .5 ohms or 1 ohm sounds good then I'm ma try .5 ohms or 1 ohms with 4 batterys in the trunk, 250 amp alt and a nice batt under the hood.

Either 2 DC LEVEL 5 15's or 2 15 btls loaded or just 1 single 18. still thinking about it.

 

[dtbrown 10+ year member]

Just be careful at .5ohms. If voltage is dropping into the 11's then it's not enough battery and will put stress on the amp. It'll probably be enough power that you won't even turn it up all the way. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[pr-festiva 10+ year member]

Impedance rise is a biatch. After rise you'll be closer to 4ohms that's why. I say 2500w cuz that's it's 4ohms rating at 13.8v but 2500w is on the low side estimate. Really depends on how low your voltage goes and your impedance rise. If you keep the voltage in the 13's then more power for sure. But you won't see the 4500w 2 ohms 13.8v rating. Anywhere from 2500-4000 depending on impedance rise and voltage/battery.
98% of amps do about 20% less then rated power due to impedance rise and people not having enough battery unless the amp is hugely underrated. Most amp manufacture ratings are with a non reactive load unlike a speakers have a reactive load.

What subs you plan on running?

Not to thread jack,, but does that mean it will do about 1250 watts at 8 ohm

 

[dtbrown 10+ year member]

Not to thread jack,, but does that mean it will do about 1250 watts at 8 ohm

Say you put a 4ohms load on it and it rises to 8 ohms probably a little more then that because the nominal load still has an effect on the power. Just an example on the 4k2d that I tested at 2 ohms rising to almost 6ohms was getting 2900w @ 11.9v and amp is rated at 4ohms 2800w @ 12.6v.

But back to your question I'd expect almost 2000w if your starting impedance was 2ohms rising to 8ohms.

 

[pr-festiva 10+ year member]

i was going to wire my two dual 2ohm subs at 8 ohm just for every day listening or would it be better to run them at 2ohm?,im talking before rise.