what amp for 3 subs

[slade311]

what kind of amp (as far as features go) do i need to run three subwoofers?

[97teg]

Were gonna need a lot more info than that. Helpful would be which subs your running the rms, single or dual voice coil and what impedence they are. You may need to also upgrade wiring depend on how big the amp is.

[93DelSolSi]

Originally Posted by 97teg

Were gonna need a lot more info than that. Helpful would be which subs your running the rms, single or dual voice coil and what impedence they are. You may need to also upgrade wiring depend on how big the amp is.

[slade311]

type r's ... 4ohm dual vc

[93DelSolSi]

ok....maybe a link to your subs, then i will tell you what you need.

[acuradriva]

you can get a .667 ohm load or a 2.667. I dont know of any amp that will safely go down to .67. You could run an amp that makes full power at 2 ohms but you wont get every watt out of it with the 2.67. JL's make full power from 1.5-4 ohms. So i would suggedt the 1000 watt JL amp.

[97teg]

What is your budget? Something probably 1000 watts at 2 ohms should work well. What size are they? ported or sealed? As much info as you can provide would be useful. If you go ported youll probably need an amp with subsonic filter. Probably need a decent x over. Are you gonna be running other amps with this one? Box size will also determine how much power should be used.

[b00gers]

Originally Posted by slade311

what kind of amp (as far as features go) do i need to run three subwoofers?

an amp doesnt really care how many subs you have. in theory you can hook up 100 subs to an amp, and it wont see a difference from that and a pair of amps. all it really sees is the impedance.

[KuttinEdge]

A simple solution, 3 amps > 3 Alpine mrd-m301's these are 350W RMS / 700W max a 2ohms.

[b00gers]

why would 3 amps be a simple solution? its much more of a hassle running and distributing the wires to all 3 and it takes up a hell of a lot of room.

[KuttinEdge]

Originally Posted by WiLL

why would 3 amps be a simple solution? its much more of a hassle running and distributing the wires to all 3 and it takes up a hell of a lot of room.

Okay, if you wanna run 3- 12" Alpine Type R subwoofers which handle 1000W max and you want to supply sufficient power each of these subwoofers... you are gonna need around 500W per subwoofer. Figure each subwoofer would like to get about 150W RMS. One of the options is to get something like the Alpine MRD-M1000 amps and connect all three speakers in parallel. This would give each of the three subs an actual Mono load of 2.67 which gives an equivalent ohms/channel to be at 1.333. Personally I dont like to drop any kind of load below 2 ohms when you are dealing with that much power. Though some amplifiers say they can handle less of a resistance, no matter what they tell you, that small of a load looks a hell of a lot like a short circuit (which usually is not a good thing unless you plan on building an electric heater). Anyway, the more speakers you have connected to one amplifier, the more work that amplifier has to due which leads to a shorter life. And besides an amp that puts out that much power is probably going to be about 2 feet in length to which you can not alter as opposed to getting three smaller amps that you can mount in different locations. Its really not that hard to wire three amps as opposed to a single amp. The hard part is routing the wires from the front to the rear, after that its distribution blocks and a relay for the remote wire.

[b00gers]

Originally Posted by KuttinEdge

This would give each of the three subs an actual Mono load of 2.67 which gives an equivalent ohms/channel to be at 1.333. .

i dont understand that.

ok an Alpine SWR-1241D is a 4OHM DVC sub and has a power range of 100-300 watts RMS.

the MRD-M1001 is 500 watts RMS x 1 at 4 ohms OR 1000 watts RMS x 1 at 2 ohms. running 2OHMs isnt really too low of an impedance, IMO.

so back to the sub, you wire each sub in SERIES and the 3 subs together in PARALLEL, you will net 2.67 Ohms. mated to that amp, you will get a little less than 1000 watts going to the 3 subs. 1000/3 is 333.3 watts per sub.

and the hassle with using 3 separate amps, besides the wiring...will be the settings. good luck setting each sub EXACTLY the same as the next. you can say that its as easy as turning the knob to the same point, but i would trust that as much as i would trust running an indepedant channel to each voicecoil on a DVC sub.

[slade311]

they r 12" in a sealed box and need .7-1.0 cubic feet of air space

heres the amp ive wanted

http://www.drdetailshop.com/1100Dreview.htm or

http://arawndark.netfirms.com/DEI_1100D/

will it work...or need do i need to go with somethin diff

just an added note...its 1ohm stable but i read its .5ohm stable for burps.

would i be better off to get the 2ohm version of the subs?

thanks for everybodys input...keep it comin

[b00gers]

nice amp. stay with the dual 4OHM subs if you are getting 3.

[slade311]

so i take it that amp will work but wired how???

[b00gers]

you wire each sub in SERIES and the 3 subs together in PARALLEL, you will net 2.67 Ohms. mated to that amp, you will get a little less than 800 watts going to the 3 subs. 800/3 is 266 watts per sub.

go for it.

[slade311]

how can i drop it to one ohm...crutchfield told me that they could take it...Will...how?
thanks

[b00gers]

Originally Posted by slade311

how can i drop it to one ohm...crutchfield told me that they could take it...Will...how?
thanks

you cant get down to 1 OHM with 3 4OHM DVC subs.

3 DVC drivers with Voice Coils in Series / Parallel

Dual-4 Ohm Subwoofers: 2.67 Ohms
Dual-2 Ohm Subwoofers: 1.33 Ohms

you can get to .67 or .33 OHM though. but i really wouldnt.

[slade311]

so if i get the 2 ohm version i can drop it down to 1.33,,,u said stick with the 4ohm if i get three...why is this?

[b00gers]

yes. if you get the 2OHM DVC, you can drop it down to 1.33

i said stick with the DVC 4OHM because i never felt comfortable with an impedance so low. but ive also never had that amp, so i guess that throws it out the window.


if you feel comfortable and believe in that amp, go for the 1.33. otherwise stick with the 2.66 OHM. if this is just for a daily street application, you should be happy with either.

[slade311]

what can happen with goin that low of an impedence?

[Bmpn]

i didnt read all that jargon LOL but Kicker ZR amps peak @ 2.67 ohms ... a ZR 600 or ZR1000 would be nice, they will draw alot of current yes, but nice.

other than that, if you port the box then i dont think an amp that does 1k @ 1 ohm will have a problem with .67ohms, seeing how you'll get one hell of an impedence rise out of the box, and the sub will have a very very dynamic ohm load showing @ the amp...