[millertime]

I have a 2400 watt amp with 4 ohms and I'm going to get two subwoofers I was wondering how many ohms I need in each subwoofer

[NorCal68]

Is it a dual channel or mono amp? You don't want to Ever put an impedance load on an amp lower than it's rated - so if you're getting two Separate sub boxes, each one should be 8 ohms. That way when you wire all the subs to the amp it becomes a 4 ohm load ('parallel wiring' divides the impedance). Be absolutely certain that the polarity is correct, in other words - " + to + and - to - ". Otherwise the signals will cancel each other and you'll not have very much bass at all.
Let me know if this helped or if you more info!

[millertime]

It's a 2 channel amp and I'm getting 2 12 in subwoofers and I'm putting them in one box

[NorCal68]

Ok, without knowing what amp you've got I'll give you a basic rule: Don't Ever have the two channels of the amp get connected to the same 'thing'. This will blow most amps up totally. So, run a separate wire (two conductors of course) from each speaker to each channel of the amp. And the heavier gauge wire the better - maybe #12 or #14 would really work well. And remember the " + to + " part... out of phase will ruin the sound.
I'm here so please ask if you have more questions.
Dave

[millertime]

So I still need 8 ohms or since it's a 2 channel amp I only need 4 ohms subs?

[NorCal68]

Check on the amp, if it says "4 ohms per channel" then go with 4 ohm speakers! It should sound killer! If it talks about "max 4 ohms total" then you'll use the 8 ohm speakers... since as we learned earlier... parallel wiring divides the impedance. If you start wiring guitar amp cabinets I'll tell you all about 'series' wiring...

Technically, the amp info would state 'minimum x ohms' either per channel or total - not 'max'...

[millertime]

2 X 600W at 4 ohms 2 X 1200W Max 4 ohms that's the watts and ohms of my amp that I got

[NorCal68]

You're doing fine, what you need to watch for is the power going into each speaker. You'll need some serious speakers to handle that kind of power. If you mean there's a switch to choose between 600w and 1200w, I'd probably choose the 600... 1200watts will blow most speakers into next week. Keep in mind that's Max Watts and is dependent upon the input signal.

[millertime]

You I think I'm gettting 1500 watt subs so they should handle 1200 watts of power but they need to be 8 ohms right?

[NorCal68]

I'm guessing that the info on the amp actually says 600w at Eight Ohms and 1200w at 4 ohms. That would make the most sense. Either way, it sounds like you could use 4 ohm speakers (clarify: that's 4 ohms each speaker) and run one wire from each amp output to each separate speaker and you've got it. Again, use heavy gauge wire like I said.

[millertime]

K thanks for your help

[NorCal68]

My pleasure! I'm here quite a bit dealing with electronics and engineering issues - check out my profile if you like. And if you could rate my answers, I think it means something here...
Good luck with your sound system!
Dave

[millertime]

LANZAR VIBE276 2 CHANNEL AMPLIFIER - ( AUTOTOYS.COM ) that's my amp with all the watts and ohms info

[NorCal68]

Thanks, I'll check it out - if there's anything unusual or different from what I've told you I'll get back to you.

[millertime]

K thanks

[NorCal68]

All right, so it's 600w RMS (which is basically 'regular normal watts') and 1200w Max or Peak... either way it should make some Serious noise for you. Lol
Will you be using a Sub-output from your tuner/CD/whatever source? That's often a single RCA type connector - looking at the picture I see there's two RCA inputs. You'll need a simple RCA 'Y' adapter from Radio Shack unless there's a switch on the amp which combines the input signals. I really wish there were more pictures, I could tell you more about spkr. Wire connectors...

[millertime]

So should I get the subs with the 8 ohms? Or the 4 ohms?

[NorCal68]

Use speakers listed as 4 ohms and wiring them individually, you've got it! Like you said, the speakers you've chosen are high power so you're good to go.

[millertime]

You ill have to take some pics of them in my 89 Camaro and post them up somewhere so u can see them

[millertime]

I got one more Question for you which subs would be better? BOSS AUDIO BLX12C Blade Exxtreme Series Dual Voice Coil Subwoofer (12") - ( AUTOTOYS.COM )
OR
LANZAR 12 INCH MAX SPEAKER MAXP124D - ( AUTOTOYS.COM )