JasonSmith

I want to put a stereo in my boat. I am thinking of going with Rockford stuff. I know I want 3 - 10" subs, 2 pair of 6x9's and 2 pair of 6.5" components. My question is how to power the subs. Most amps are only mono, 2 or 4 channel. I know I'll need a 4 ch. amp for the 6x9's and one 4 ch for the 6.5's but what about the subs? 3 monos? I don't think I have room or budget for that.

ratman

just make sure what ever amp you buy has a cooling fan so it wont shut off when it hot out and you cranking it up

Harper220

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BDiggity

If you want Rockford stuff, i would get a Power T8004. Run all 4 components off the the front channels. This will give u about 100w x 2 running in 2 ohms, this is about 50w per speaker. Bridge the rear, get 3 8ohms single coils subs wired in parallel. This will put the load on the amp at about 2.5 ohms which the Power series can support bridged. The T8004 goes for about $400 or so on ebay.

You can run the same setup w/ a P8004 which is cheaper than the Power series, but the Power amps are better built, have active cooling & can support loads down to 1 ohm.

Here is what i am elbows deep in adding to my boat right now. A RF P4004 (100w x 4 2ohm) will run my 4 Kicker fronts & 4 Kicker rears. I did this because sometimes we need fade control. A P3001 (300w x 1 2ohm) for 2 JLAudio 10" W1v2 4ohms in sealed box. The P4004 goes for about $170 & the P3001 for $140 on ebay.

I am going w/ the Punch series because we really dont crank the stereo up that often, & i cant justify spending too much on amps when we dont put more than 15-20 hrs on the boat a yr.

Wally

iTrader: (1)

seems i may have ben out of the audio stuff for a while.....but i thought the 8ohm stuff was for home use???? ive never seen it for automotive use before??? i guess it realy doesnt make a difference when wired up right though???

question for ya Jason....why only 3 subs? is it a space issue and thats all you can fit? In my scarab i installed 4 10" subs under the rear seat......had them wires both series and parralel to make them 4ohm on a single chan 1000watt amp....it hit hard enough so you couldnt see straight!

Gary Anderson

I've wired 3 by using 2 single coil subs and a dual voice coil in the center. This uses a 2 channel amp with low pass filter. The individual VCs should be the same impedence, ie all 4 ohms. You can wire each channel to a single VC speaker then in parallel or series to 1 VC of the dual VC speaker. It depend on if the amp will support the impedence of parallel wiring.
Most unbrideged amps I've seen can run 2 4 ohm speakers in parallel (2 ohms). But bridging usually requires a 4 ohm minimum.
Gary

BDiggity

He could accomplish a 2.67 ohm load w/ 3 4ohm dual vc's also. SVC's are normally cheaper than DVC's so i was trying to save him a few bucks.

JasonSmith

Woah! You guys are talking a different language! Sounds like I'm in Mexico.
I want to go with 3 because I can't fit 4. I still am thinking I'll just go with 2 10's and skip a pair of 6x9's. I just want it to be friggin' loud and sound good.
Do I need to get dual voice coil subs? Do they sound better?

BDiggity

Como esta?
Would you still have 1 pair 6x9s? (i am trying to determine ohms on circuit). Two good quality 10" subs can hit pretty hard. With 2 subs, you can run more power to each of them & still keep the load on your amp reasonable. You dont need dvc subs, they are just popular cause the allow flexible wiring options to accomplish a certain load. Here are some options (i have way too much time on my hands .

RF T8004
400w x 1 @ 2ohm bridged (actual is 522w x 1)
2 4ohm svc = 2ohm
2 2ohm dvc = 2ohm (wired properly)

RF P8004
400w x 1 @ 4ohm bridged (actual is 462w x 1)
2 4ohm dvc = 4ohm (wired properly)
2 8ohm svc = 4ohm

Based on the amp assumption, each sub would be getting about 200-260w each (depending on amp), that would match up w/ either a RF P3 sub or a JLAudio 10w3v2.

When we raft up at LOTO we can have a sound off.

Gary Anderson

Although I'm at LOTO all summer, that might be a problem. The 3 subwoofoers I was talking about is in my 68 Vette.
Gary