D1NOnly34

iTrader: (4)

I have a pair of Rockford Fosgate HX2 12" Subs, they are DVC 4 ohms, so they can be wired for 8 ohm or 2 ohm. Right now I have a Rockford FOsgate 1001bd mono amp, which are stable at 4 ohms and 2 ohms, at 4 ohms it is 500x1 and at 2 ohms its 1000x1. Since I have two 4 ohm DVC subs, I cant wire them in the way that the amp is in 2 ohm mode, so I have them to the amp in 4 ohm mode. Of course, when in 2 ohm mode, there is mroe power pushed out. My subs handle 1000watts peak and 500 watts RMS. Now here are where my questions start, since I have 2 subs wired to the only channel on the amp, how mnay watts are going to each sub? The amp is not on full power nor is the bass ****, so does that still mean each sub is getign 500 watts? Or is it cut in half? I'm askign this because I got a sweet deal on a Rockford Fosgate 1500bd, which is 750x1 at 4 ohm and 1500x1 at 2 ohm. Will that be too much for the subs? Just fine? Not enough? Please let me know cause I am a little confused. I would assume that since 2 subs are wired to the channel that maybe the wattage is split in half or something, I wouldnt think that each sub would be getting 500 watts, cause then that would be 1000watts of output form the amp, or I could be wrong.

slickrick

iTrader: (12)

if that 1001bd amp is 1000 rms then it will push 500 to each sub. that other amp you mentioned is too much power. if you use the smaller amp keep the bass boost off and you should be fine. also depends on the size of the box too.

D1NOnly34

iTrader: (4)

I have a huge..HUGE ported box. Also, the 1001bd is 1000watts max at 2 ohms, the way I have it now (4ohms) is 500 watts max, but the amp isnt pushing max power.

harrymay

it also depends on whether you want a headache whenever you get in the car. i have an 800w kenwood amp with 4ohm kenwood 12's. right now its pushing about 150 to each sub, thats more than enoguh power, it also depends on the size of the magnet, those hx's have a big magnet so pushing a higher wattage would be better

D1NOnly34

iTrader: (4)

Right now it is pretty loud, but I know I want more. The magnet on the HX2's are huge, and I know since I'm running the amp on 4 ohms, and not even full power, then each sub is getting like 200 watts max, whereas i get this new amp, each sub would be getting like 350 watts max, still under the RMS range for the sub.

|Bijan|

iTrader: (12)

Just don't PUSH the subs over a long period of time.

Rockford is underrated in their "watts RMS/peak"

D1NOnly34

iTrader: (4)

I know that, Rockford always pushes more than stated, but I listen to bass a lot, and with this new amp, I STILL would be under my RMS range, wouldnt I? I thought this new amp wouldnt be bad.... I think I should be fine with it... unless someone can prove otherwise

D1NOnly34

iTrader: (4)

Any new info? Am i OK with the new amp?

joebangaa

iTrader: (3)

whats wrong with the 1001bd...can't you wire two dvc 4ohm to 2 ohm impedence?? I have 2 dvc 4ohm and that's what i'm doing with a diff amp...just stick with the 1001bd.

D1NOnly34

iTrader: (4)

nope, you cant. A 4 ohm DVC sub can either be wired in 2 ohm or 8 ohm load. Two 8 ohm load speakers ptu together onto one channel becomes 4 ohm, and two 2 ohm speakers is another number, but its nto 2 ohm. If I wanted to get a 2 ohm load from the amp, I would have needed to get the 2 ohm DVC version of the subs. Also a big reason for doing this change is because i'm getting the 1500bd amp for way cheaper than the 1001bd

joebangaa

iTrader: (3)

ah i'm an idiot you're right. I have 2 4ohm dvc myself but for some reason thought my amp is bridged into 2ohm...

D1NOnly34

iTrader: (4)

Heres the thing, since im keeping the same subs, i'm still gonna have that problem with the ohms, not being able to have my amp at 2 ohms. BUT, since I'm getting a bigger amp for a cheaper price, I figured why not, i'm saving money and getting more power. Now if one day I decide to change my subs to dual 2 ohm...oh man... :druel:

Golden Ice

I'm not real familiar with fosgate stuff, but you really can't have too much power with pioneer or JL subs..for awhile I was running a 2600w amp to drive 2 700w subs..in most cases, you're better off having an amp that puts out considerably more power than your subs are designed for, and turn the output level down and the bass boost up til its where you want it..if you're wanting high SPL and arn't as concerned about SQ, turn your fader to the rear (provided you have a fading rca output on your h/u, if not than forget about that), crank your h/u volume up pretty high, use an amp that is way overkill (I.E use a 2000w rms amp to drive 1 700w peak sub), turn the bass boost up all the way, keep a x-over set around 40-55 hz (again, this is ONLY for SPL, not sound quality..), and keep your amp power output turned down fairly low...a buddy of mine and I hooked a JENSEN amp to 2 JL 12s, bridged it down to 0.5 ohms, and put on some heavy duty gunmuffs..the amp smokes and smells like burning wire, but its been hooked up like that for 2 years..subs are fine, amp burned up 1 side, so we moved it to the other side about 6 months ago..I wouldn't reccomend bridging a quality amp down that low, but this was a jensen..I've done it with a legacy too, but I run a SQ setup in my car now, so I don't opt for 0.5-1 ohm bridging..not to mention my pioneer subs don't play cleanly at 1 ohm and below..the JLs we used have been beat to death..they're 8 years old and have been in 7 different cars, including a sentra that won a local SPL sound off when they were new..

Again, I'm not very familiar with Fosgate equipment, so maybe everything I just said won't apply to your case..I just know some of the little tricks to squeeze high SPL out of cheap amps and subs..some of which are really pretty stupid, but they work..Oh, and DO be careful with that ported box if you DO use the bigger amp...that will cut the subs power handling down considerably..