audio system question please help

[dlcpsycho]

i have an amp that puts out 1800watts rms X 1 at 1ohm and its a mono amp

i know i need 2ohm capable subs or atleast dual coil subs to wire it up properly but what i need help with is what power rating does the sub need to be

i was looking at some that have rating as follows

75-1000watts rms and
2000watts peak

can this sub handle the power my amp will be putting out to them? if not what does the rating have to be one the sub and what brands/type/size you recommend.


thanks for all the heklp in advance.

[turbcivic]

Yes, but what type of amp and subs are talking about since some manufacters over rate and underrate their equipment.

[dlcpsycho]

well the amp i got is audiobahn A18001DQ and i was looking at a pair of 15in kickers(box kind)

[killah_xft]

your subs should be able to handle what the amp puts out, so long as you don't crank it.. that's the only way you'll blow them is if you just crank it, and the juice goes to the subb, and you'll hear a loud *pop* that sucker is gone, cause you just fried the sub, and killed the voice coils.. you might also want the check on getting a 2 channel amp if you're getting 2 subs... a mono amp is meant to power one sub effectively, you can wire it to run 2, but that just makes it sound like shit. that's why most people get a 2 channel amp and bridge it to run 1 sub, or they can run it unbridged with 2 subbs.. as far as those subbs go that you were looking at, what are they(model/make)?

[dlcpsycho]

alright i changed what i am doin. i plan on hooking 2 audiobahn A18001DQ amps up to 2 Rockford Fosgate 15" Power HX2 RFR3115 .
those subs are rated at 1000watt RMS and peak 2000watts. so 1 amp for each sub? so will this allow me to run my subs with out the worry of over powering my subs. cause my subs are rated dual coil at 2ohms so when i hook them to my amp it will be droped down to 1ohm which my amp pushes 1800watts rms at 1 ohm. thanks for some more help

[LB Dinh]

Well, if you want balance...you'd want a sub that handles at least 1000 watts RMS.

But realistically, any sub can handle that amp provided that you don't crank the volume to the max or something to that extent. Turning up the volume is just like increasing the power to the amp...am I right? So if you just turn on your system with the volume at low...you're not overpowering your sub.

[turbcivic]

Which type of kickers, L5 or the L7s or just the massive solo x? L5 can handle that power for a short amount of time and the other two will just laugh it off.

[GScivic7]

yah that amp is too much for the L5, my friend had one in a vented Kicker box with a memphis amp running it at about 1000 watts, blew it to pieces in a few weeks. He's running an L7 now and is much happier

[AzCaz]

That audiobahn amp is a monster and it would be giving 1,800 watts rms to each sub designed to handle no more than 1000 (Fosgate Power Hx2). You would be giving them way too much power - they will blow. Also what kind of alternator do you have? I melted a 130Amp alternator with one of those amps even with a 2 farad cap setup. To not blow up your alternator you have to have atleast 145amps to power an amp big enough for those subs (200Rms). And with both amps - if you found 2 subs that can handle the load @ 1 ohm yuu would need over 260 amps. (All not including the power for your car and mids and highs) Be careful - do some math to make sure you dont throw your money away on a setup that will die in under a year.

[dlcpsycho]

so you telling me if i hook up 1 amp to one o f the subs that rms at 1000 and peak at 2000 the sub would blow? the only reason i ask about the subs is because i cant find no sub that will handle 1800 rms.
and for the altenator i am trying to get a 250amp altenator and have one 3 farad cap

[AirAllen01]

I have an older Audiobahn A2200HC amp. It's a two channel that spits out 1600 @ 1-ohm rms, and I've only got two 10-inches on it that can handle 400 rms, but my gain and my boost are only at half. It doesn't matter what speakers you get as long as you don't turn up the juice too high. The Rockford speakers you are talking about will do great for you, but you should bridge them to only one amp. Wire each sub down to 2-ohms. Then when you bridge them they will be wired together at 1-ohm, giving you 900 wts rms to each sub. Even then you can still turn your power down a little and run around 700-800 to each and beat the competition. Save a little money, and only get one amp, you'll be happier in the long run.

[AirAllen01]

Also, for the cap, you can get a 1 or a 3 farad cap, or a 5 or 10 farac capacitor bank. The rule of thumb is 1-farad for each 1000 watts. I run two amps, the Audiobahn 1600 rms and an Audiobahn 75x4 off the factory alternator of my 95 Ford F-150. Check the fuses that you need for each of your amps to run and get an alternator that handles that, cuz you will never pull that many amps off with that stereo, since your amp won't actually pull that much even when turned completely to the max.

[dlcpsycho]

well the subs i have are dvc 2ohm for each coil. so if i wire the coils up in series it makes it 4ohm but wire in parrel they goto 1ohm. so if i wire them in parrel i have to have 1 sub for each amp or else i would be making a .5ohm load for my mono amp since mono amps are already bridged. but if i wire the subs coils in series and then the two subs in parrel to the mono amp , it takes the load down to only 2ohms which produces a 1200watt rms only. so the only way to get 1800watts rms that 1 ohm is 1 amp for each sub. but that would be the only way to wire up the subs so that they dont blow right cause if i hooked up 1 amp to one sub it would produce more rms than it could handle. so if i only hook up this one amp to the 2 subs at a 2ohm load would i still need to get a new alternator or would a 3farad cap by it self work? in addtion to all that i plan on having 5 lcd screens and a sirusis radio tuner.
thanks again for any help and input

[killah_xft]

um that's some major draw you're running off the alternator and battery... have you thought about putting in a second battery for all your electronics?

[AirAllen01]

Here's what you should do. First about the subs. In my opinion, you should actually forget about getting the Rockfords and look more into Image Dynamics ID Max 12's. They have the same 1000 rms power rating, but they are only 1800 max, and dual 2-ohms. If you check Sounddomain.com they have them listed. If you notice that their dB is at 93.1 compared to Rockford's 87.5, this means that it takes less power to push the ID Max's as hard as the Rockford's. You should be able to push each one pretty hard with just the 600 watts or less. You can actually wire the subs two different ways. You can wire each sub to 4-ohms and then bridge them to 2-ohms, giving you 1200 @ 2-ohms, or you can wire each sub to 1-ohm and run them in a series, also giving 1200 @ 2-ohms, but since the resistence for each sub is smaller they get slightly a bit more juice that way (Not much, but a little). My friend has one twelve and says he thinks it sounds better than his Rockford Punch HX2 15 that he had. Also, you might check AdireAudio.com (I haven't done any research on them), but he says that they are also supposed to be some awesome subs. Second about the cap. The 3-farad cap should do, but you might want to go ahead and install a second battery anyway to maintain the life of your battery for your car, because of the screens and everything else. But before you decide, I would check with the local car stereo shop for details. Don't go to Circuit City or Best Buy or any store like that, go to an actual stereo shop. They have more knowledge about stereo from experience. Any more questions just ask.