Amp RMS watts

[kinkyllama]

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 9&tc=photo

Ok well it says 1 x 600 watts rms at 2 ohm
So is that 300 watts rms into each sub with two subs? and what if the subs are 4ohm? or even dual 4 ohm? i still dont understand this that well.

[TheGreatAndPowerfulOz]

Ok, it is a mono amp, so it has only 1 output channel (which I'm sure you allready knew).
600 watts at 1 ohm would work best if you have 2 subs that each have dual 4 ohm coils.

You can wire each sub in parallel to give a 2 ohm load, then wire each 2 ohm load sub in parallel to be seen by the amp as 1 ohm.

Think of it this way:
If a sub has two 4 ohm coils, it can be made to read as 2 ohms or 8 ohms.

Wire the two coils together in series and it adds the two ohm loads together to be seen by the amp as 8 ohms.

Wire the two coils together in parallel and it divids the two ohm loads to be seen by the amp as 2 ohms.

After a sub's two coils have been wired together, the sub must be considered as a single coil with what ever the load you configured it to be. Example, the sub, wired in parallel, is now a 2 ohm load sub.

You can wire two subs together and use the same formula.
Two 2 ohm subs in parallel are seen as 1 ohm.
Two 2 ohm subs in series are seen as 4 ohms.

I have not read the specs on that amp, but if it follows most amps amp says it is 600 watts RMS at 1 ohm, then at 2 ohms, it will be 300 watts RMS, and at 4 ohms, it will be 150 watts RMS.

Again, I have not read the maunal on this amp and it may not follow what most amps do with different ohm loads.

Did I confuse you enough?

Cliff

[kinkyllama]

haha. Thanks alot for the step by step explanation

[TheGreatAndPowerfulOz]

Read Erfinder's electronics theory post; it's very useful.
For your needs as it applies to sub coil resistance, read part 3.
http://www.daewootech.com/forum/viewtopic.php?t=1446

Erfinder: Thanks for posting that information.


Cliff

[kinkyllama]

Well i think im going to get two of these subs (the P3s):
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... otohosting


and power it with this Rockford amp:
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 9&tc=photo

[TheGreatAndPowerfulOz]

I dont think those subs will be best for that amp.

If you can get two single 4 ohm coil subs, then it will work fine on that amp.

Two 4 ohm coils can be wired in parallel to 2 ohms.

The two subs you posted the link to are dual 4 ohm.
These can be wired to yield, 1 ohm or 4 ohms or 16 ohms.

Those subs will either be too quiet at 4 ohms, or draw too much power from the amp at 1 ohm and shut it down in protection while making it overheat.

Cliff

[kinkyllama]

Yeah i wanna get the single one, not the dual... i just had that link handy.

[TheGreatAndPowerfulOz]

Oh ok.
Remember, even if you have good equipment, the box and build quality is 75% or more of how good they will sound.

Crappy subs in a good box can sound good.
Good subs in a crappy box can sound bad.
Good subs in a good box can sound wonderful.

Remember to have a box that matches the RF's enclosure specs.
Also, remember that if you want more sound quality, to build accordingly.
If you want more SPL, then again, build accordingly.

[kinkyllama]

Im trying to find a place to build me a custom box to show it off in my trunk and have it all lay in the tire compartment. But i need to find a smaller shop as i wanna trade for the work. My family owns a lumber company, i know 800$ worth a wood (which they can use for boxs) is a good trade for like $200 work of work.

[TheGreatAndPowerfulOz]

Find references of pervious customers.
Look VERY CAREFULLY at their work.

I would very strongly reccomend this company. Their work is better than any I have seen from any custom shop, and he can build specifically to your car.

http://www.woodlawncabinetry.com/

[kinkyllama]

I want someone local, and need them if i trade