real world rms

[reaper7534]

I was originally going with a single alpine type r 12" DVC 4 ohm running @ 2ohms running around 600 watts in a sealed enclosure. I'm now debating 2 subs in a sealed box, I don't listen to rap. My amp will do 1300 watts @ 1ohm, with efficiency rating, what can i realistically expect for wattage output at idle conditions without pushing the amp to its limits? PPI black ice

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[adulbrich 5,000+ posts]

Depends on what your voltage drop and impedance rise is.

You can also clamp test your amp to see what it is really putting out

 

[reaper7534]

Should have added ill be adding a XS d5100r battery

 

[shammyhavik]

Hookup the system, and buy a digital multimeter to monitor voltage at the battery.

Honestly u should have headroom for ur electrical's peak but you should do a beefier run of welding wire from the alternator to battery

 

[n2audio 5,000+ posts]

It's about impossible to predict with any accuracy.

But if it's 1300 at 14.4, mathematically it would be about 1060 at 13.

There's probably some regulation going on that wouldn't let it fall that far.

Of course, that would only be achieved with a full volume sine wave so I'm not sure what you're worrying about anyway.

If you're not going to "push it to its limit" it will never be close to full power.

It's irrelevant because the "real world" (measured) AVERAGE power playing music at a moderate volume would probably be in the 200w range.

 

[trumpet 5,000+ posts]

I was originally going with a single alpine type r 12" DVC 4 ohm running @ 2ohms running around 600 watts in a sealed enclosure. I'm now debating 2 subs in a sealed box, I don't listen to rap. My amp will do 1300 watts @ 1ohm, with efficiency rating, what can i realistically expect for wattage output at idle conditions without pushing the amp to its limits? PPI black ice

On music that doesn't have artificial bass that happens to coincide with the lowest impedance the subwoofers will play the real power output is going to vary wildly from a few watts to hundreds of watts. Transient peaks might push the amplifier to its limits, but that's what the capacitors inside the amplifier are there to handle. As mentioned, your electrical system needs to be up to snuff with the entire circuit optimized for low voltage drop and adequate current delivery.

I suggest running 1 sub in a ported enclosure that is designed to play a wide range of frequencies. This is more efficient and you will gain a lot more output this way. Going for higher power with twice the cone area costs more than just buying that second subwoofer.

 

[Jeffdachef 5,000+ posts]

single ported type R D2 wired to 1 ohm is what you want, after impedance rise you'll barely get anything out of that amp on music if wired to 2 ohms.

btw, type R 12 D2 for 100 bucks

http://www.caraudio.com/forums/subwoofer-classifieds/613016-alpine-swr-12d2-12-type-r-sub.html