sub general knowledge

[Toomstone]

if im looking at a sub that has peak power of 1000 watts and rms of 300...do i want to put a 300 watt amp in not to hurt the sub or can you go alot closer to 1000 watts without blowing it? also if it has daul 2ohms....what does that mean? and how does that affect the type of amp i have to buy?

[riverbound]

You are far more likely to blow a sub from distortion than overpowering. It has always been my recommendation to run as much power as you can to speakers. Running the min. ammount of power to a speaker will mean you will push the amplifier much harder to move the speaker. The harder you push the amp the more distortion you will induce into the speakers. More distortion equals more damage to the speaker.
Basically. you want to run more "clean" power to your speakers to prevent them from blowing.

[ROZ]

TS, There was a time when dvc speakers(dual 2ohn voicecoils in your case) were constructed a litle different. That day has long gone. DVC's for the most part just give you a greater variation in wiring configuration when running multiple drvers when trying to target a specific load for an amp :)
Does it effect the amp you buy? Yes. Try to match the amp's RMS rating at the power rating you want and get the correct impedance sub that will RMS at near the same RMS as the amp puts out :mix: For example. If an amp puts out 300RMS with a load of 2ohms at 14.4 volts a subwoofer wired at 2 ohms with a 250-350RMS will match up
You'd be surprised ow much power a quality speaker can handle from a clean am, but even then you're burning the candle at both ends...
300RMS 1k peak... You looking at Alpine subs?

[Toomstone]

ya, im looking at a alpine swr-1021d. what would be a good amp to run with that? im looking to get most of the stuff online then get it installed somewhere.
Thanks
Toomstone :crossx:

[Phat Matt]

ya, im looking at a alpine swr-1021d. what would be a good amp to run with that? im looking to get most of the stuff online then get it installed somewhere.
Thanks
Toomstone :crossx:
Are you running one sub?

[Toomstone]

theres no subs in there right now and i just want to get one because thats all i can fit without getting a custom box

[Phat Matt]

If you got the Alpine SWR-1041D (http://www.etronics.com/product.asp?stk_code=alpswr1041d&store=&catid=368) (dual 4 ohm voice coil) instead you could wire it in parallel to show a 2ohm load on the amp and run the Alpine MRD-M301 (http://www.etronics.com/product.asp?stk_code=alpmrdm301)
That set up should sound just fine and still pretty cheap!

[Toomstone]

whats the difference between daul 4ohm and daul 2ohm? and do you need two channels or bridge a single channel amp?
Toomstone :crossx:

[ROZ]

The difference will dictate the overall load on your amp. If you want to play at 2ohm you'll need the 4ohm version. On a single subwoofer with the coils wired parallel you'll end up 2ohm... Get the mono sub amp that is stable to 2ohm.. the alpine matt suggested will work fine in a single driver application. Also, the amp is controlable from an ALpine headunit....

[Toomstone]

if a single channel amp that has a 1000watt max but says 400 wattx1 at 2ohms, and the apline sub has daul 2ohms....will i be getting 800 watts to the sub?

[Phat Matt]

if a single channel amp that has a 1000watt max but says 400 wattx1 at 2ohms, and the apline sub has daul 2ohms....will i be getting 800 watts to the sub?
Dude. Just get the amp and sub I suggested and you'll be fine. If not, go to a stereo shop and tell them you don't know what you want and bend over.
My work is done here.
Roz, back me up. On a side note. I've been drinking all night, and I just got home. :D

[phebus]

if a single channel amp that has a 1000watt max but says 400 wattx1 at 2ohms, and the apline sub has daul 2ohms....will i be getting 800 watts to the sub?
If wired in parrallel, yes. But it would be 800 watts x 1 at 1 ohm. See how long it holds up at 1 ohm!!

[Toomstone]

Dude. Just get the amp and sub I suggested and you'll be fine. If not, go to a stereo shop and tell them you don't know what you want and bend over.
My work is done here.
Roz, back me up. On a side note. I've been drinking all night, and I just got home. :D
im really just trying to learn what all the different stuff means...because i was completely lost before how some of it worked. thanks alot :) :)
Toomstone :crossx:

[Phat Matt]

im really just trying to learn what all the different stuff means...because i was completely lost before how some of it worked. thanks alot :) :)
Toomstone :crossx:
Didn't mean to be a dick at 3am. Knowing how to wire the different subs to show different Ohm loads makes a difference. Go down to page 4 (http://www.jlaudio.com/subwoofers/pdfs/10W3v2_MAN.pdf) on this manual and you will see how you can wire the subs to get the Ohm load you are looking for. Typically, they lower the load on the amp (1 Ohm vs 4 Ohm), the more power the amp will be putting out to the sub. You have to make sure the amp can handle the load because not all can. It is best to match up the RMS levels between the amp and the sub fo sound and reliability purposes.
See I can be nice. ;)

[Toomstone]

Sorry if im asking alot of questions :confused: ....but i just want to find a setup that will put out good sound with the swr-1021d because i can get a good deal on it from a legit website(ikesound.com) because someone i know has bought from it.The mrd-m301 amp is on that website too but i dont know if its good to power the swr-1021d because that would put it at 1 ohm...right?:squiggle: but im looking in general for a 10' sub with high watts and an amp to power it for about $250 because im planning on putting only one in my truck hopefully before summer. sorry again
Toomstone :crossx:

[Phat Matt]

That one would be at 1 ohm and no that amp wouldn't handle it. If you bought the ones I suggested from www.etronics.com (follow the links I posted earlier) it would cost $252 plus shipping, no tax.

[Phat Matt]

Try calling Circuit City and see if they have the ones I mentioned in stock and for how much. Online the amp is $150 but they don't show the swr.
Brea Store #412
855 East Birch Street
Brea, CA 92821
(714) 256-2140

[BoatFloating]

Try calling Circuit City and see if they have the ones I mentioned in stock and for how much. Online the amp is $150 but they don't show the swr.
Brea Store #412
855 East Birch Street
Brea, CA 92821
(714) 256-2140
$150 for a amp???? Is that made by Sparkomatic?????? :D

[Toomstone]

will a 2 channel amp run the swr 1021d at 2ohms because it has a channel for each side and will a 2 channel run the swr 1041d at 4ohms for the same reason? (i think im learning this right :jawdrop: ) :D
Toomstone :crossx:

[Phat Matt]

will a 2 channel amp run the swr 1021d at 2ohms because it has a channel for each side and will a 2 channel run the swr 1041d at 4ohms for the same reason? (i think im learning this right :jawdrop: ) :D
Toomstone :crossx:
You could run one channel to each voice coil but there isn't really a reason to do that. All you need is a mono amp to push that sub, but you could get a 2 channel amp and bridge it.

[Phat Matt]

$150 for a amp???? Is that made by Sparkomatic?????? :D
You're not helping. :hammerhea :hammerhea :hammerhea :D

[BoatFloating]

You're not helping. :hammerhea :hammerhea :hammerhea :D
Your right with a $150 amp....
:220v:

[Toomstone]

You could run one channel to each voice coil but there isn't really a reason to do that. All you need is a mono amp to push that sub, but you could get a 2 channel amp and bridge it.
wont any mono amp put the swr-1021d at 1 ohm and not be stable because its a daul 2ohm? so i thought a 2 channel would be 2ohms to each of the hookups on the sub?

[Phat Matt]

wont any mono amp put the swr-1021d at 1 ohm and not be stable because its a daul 2ohm? so i thought a 2 channel would be 2ohms to each of the hookups on the sub?
The amp doesn't put the speaker at 1 ohm, it's the other way around. Depending on how you wire the speaker. Some amps are stable to 1 Ohm. That Alpine isn't. You could find one that is but if you want a decent set up for your budget, I still say order the amp and speaker set up I suggested.

[Toomstone]

so matt
with your setup up:D ....does the total watts come to 300 ? :confused:
Toomstone :crossx:

[Phat Matt]

Actually it comes to 350W x 1 RMS (2ohm @ 14.4V). :D

[Toomstone]

thanks alot for your help matt....one last question....can you control the subs bass on any headunit you buy or does it have to be the same as the amp?

[Phat Matt]

If you want to control the sub by itself you need a head unit with RCA sub outs. It doesn't matter who makes it. Most new head units today have RCA outs for front, rear, and sub.