I need some new subs

[A-hole]

I have 1500 watt mono block. I need some subs that can sound decent with this amp, and not no crappy subs, I had some hollywood excrusions and thoose could not handle the power. I have room for 2 12" subs. and the amp can go down to one ohm.

I like my system to sound clean and loud. I enjoy listening to bass cds too. power supply, tech master peb ect. so those subs must have good excrusion. How can I get my trunk to stop rattling too, I have a 85 buick regal, and the back dash rattles, that plate just outside on the rear window keeps rattling like crazy, I tried dynomat to stop it, and It still does, my trunk has dynomat in it. I had it put in by ultimate electronics and it is peeling. ok well please list your suggestion thanks.

Click to read more...

 

[bumpin_blazer 5,000+ posts]

all depends on how much money you want to spend. if you want a mix of spl and sq that can handle 750rms a piece i'd suggest something like a brahma but those are dual 2ohm subs won't wire down to 1 ohm with 2 of them. ummmm, id say a pair of eclipse alum's or ti's if you have the cash would sound really good and loud. you could look into a pair of idmax subs if you can afford them also. give some price limit though

adam

 

[EarDrummin. 10+ year member]

Originally posted by bumpin_blazer all depends on how much money you want to spend. if you want a mix of spl and sq that can handle 750rms a piece i'd suggest something like a brahma but those are dual 2ohm subs won't wire down to 1 ohm with 2 of them. ummmm, id say a pair of eclipse alum's or ti's if you have the cash would sound really good and loud. you could look into a pair of idmax subs if you can afford them also. give some price limit though

 

adam

I don't mean to start another arguement about this, but why wouldn't they wire down to 1 ohm? dual 2 ohm @ parallel = 4 or 1 ohms yeah?

 

[bumpin_blazer 5,000+ posts]

for a single dual 2 ohm woofer yes wires do 4 ohm or 1 ohm PER SUB. now he said he wants 2 12"s to wire down to 1 ohm you do a series parallel which will work just most people don't do it. i think that wire's to 2ohm i'm too tired now to think straight.

adam

 

[Sspider 5,000+ posts]

wuts wrong with Combination of Series & Parallel.....

dats how i will be wiring my dd;s to get a 2 hm load?

 

[EarDrummin. 10+ year member]

Yep, that's how I wired my Perfects, too.

 

[bumpin_blazer 5,000+ posts]

i didn't say there was anything wrong with it except the one time i did say that i was in error got bad info from a friend of mine. series parallel works fine it is just not commonly used i have a few friends that use it although he has 3 dual 4 ohm subs wired in some funky *** configuration.

adam

 

[Sspider 5,000+ posts]

how come it isn't used often....?

rather curious now...it must not be used for a reason....

sspider

 

[bumpin_blazer 5,000+ posts]

i just haven't seen it used very often i don't know why. i assume most people don't know about it honestly i mean they wouldn't want to calculate ohm load of series parallel ya know.

adam

 

[wolfey 10+ year member]

doo doo you are an idiot why dont you post somewhere else..

As far as the series parellel question, the answer i believe has to do with an amplifiers damping factor. Car amps for some reason dont respond well to a series configuration, and it causes each speaker to performs speratically and not together.. your subs will probably be moving in different directions. I accidently hooked my subs in series and they sounded very weird and not loud at or good quality at all.. I dont know if other people have the same thing or what.. or maybe that was just because it was at 8 ohms and so it wasnt getting much power... I think if you have a stereo ampflifier rather than a class d it wont hurt as much.. i think i read that somewhere but who knows.. If its sounds good who gives a shit though.

 

[A-hole]

It should not matter, if you wire a system and series parlal the amp see the final load,

for instance, I am wireing my hollywood, in parrle ciols, then I am putting the subs in series with eachother, so the ohms goes back up. if you know how to wire system, or have any electronic tech, math knowledge, you should be able to get the lowest ohm vaule possible and match it with the amps lowest ohm vaule. I can only go down to 2 ohm, no matter how I wire thees subs, because it a dual 2 ohm coil. per sub...........my alpine r10's had 4 ohm dual coils, I had those at 1 ohm and my amp thore them up.that wiring was parrel parrell. so, if I wont a 1 ohm load on my amp, I may have to get 4 12' with dual 2 ohms coils, or 2 12'' with dual 4 ohm coils, or what ever esle you can think of, I know theres more, but I am not going to list them all. ok, now the brahma, seems to be a favorite AMONGST THIS FORUM SO CAM Any one tell me how exspensive they are? and the DD's

 

[wolfey 10+ year member]

Ok well i dont know how your system came out but i know one thing for a fact... Wiring in series is not recommended for car subwoofers.. I have done it before by accident and it sounded like crap.. Not only did the subs have no power they were acting all weird and sounded funny. You CAN however, wire dual voice coil subwoofers individually in series, and that works fine, but wiring multiple subs in series has bad effects because of an amplifiers damping factor.. If you read just about any car amplifier manual or manuals for wiring car subwoofers, you will see this.. with other applications such as guitar amplifiers and things i've heard that its more popular to wire in series.. but in car audio its not recommended.. certain amps/subs may sound fine but others won't.. And having different subs wired at ohms does have an effect, the ones wired at lower ohms will see more power from the amplifier and will be pushed harder.. it may still sound fine yes, but you will surely have to have a box with separate chambers so that they dont cancel each other out..

 

[A-hole]

yes, if you wire pair of subs in series it will sound like shit , because you are adding them together.4 ohms + 4 ohms = 8 ohms: if you put this on an amp that puts out say 600watts rms @ 4 ohms, then that would mean that the 8 ohms load would be 300 watts rms @ 8 ohms. do you understand that math and logic? the lower the resitsance the higher the power There is a formula for this and its called ohms law. and kirkhofs voltege law. look it up if you want to know more about wiring.

you can run a series set up, but not alone, unless you have two 2 ohm subs, but most of the time it requires a paralle series combo.

 

[bumpin_blazer 5,000+ posts]

hey wolfer a possible reason your subs sounded like a@@ is b/c maybe they were out of phase you think of that one??? wiring multiple subs in series isn't a bad thing i had 4 HE2's in my jimmy a while back wired in series then parallel to get me a 2 ohm load worked perfectly fine and dandy for about 5 months in my car. that's just my personaly input other reason your sub prolly sounded bad is being in series is say it was dual 4 ohm sub then series is 8 ohm load now if you then switched it to 2 ohm for that sub then it does what like 2 times more the power or more depending on amp. that's just my thought on this not trying to argue.

adam

 

[wolfey 10+ year member]

Ok, well if you all have done that and it worked well than thats great, i'm not one to go by what all the manuals and books say, i like to try new stuff and if it works good then i'll go for it.

And yes, i konw ohms law and how to calculate impedance and all that good stuff. I just know that my subs sounded really weird when wired in series. Part of that was because they werent getting as much power.. my 81000d probably puts out like 300 watts rms at 8 ohms tops.. BUT,that is pleanty enough power to make my subs sound good, just not loud.. the thing is, is that they didnt even sound "good". they sounded funky and off beat.. Now i'm not sure what you meant about "out of phase" but maybe.. i do know though after reading the infinity manual, and i've seen it in other manuals, that it says wiring in a series configureation is not recommended for the so called "damping factor", and you will get sloppy results it says. Now technically wiring at a higher impedance load should give a cleaner signal, but with less power.. so the speakers should sound "better" technically, to the point at which the amplifier would be driven into clipping, which would be at a decent level given 300 watts rms is enough to make a pretty loud system believe it or not. BUt anyways, if it worked good for you then i'd say theres nothing wrong with it.. I just wouldn't buy a system with that in mind unless you konw how it will sound cus you might get unhappy results.. http://manuals.harman.com/jbl/car/Owner's%20Manual/GT1241%20om.pdf

look on page 3 and you will see what i am talking about. but hey, dont believe them, believe your ears