Want to install 2 Fubar 12s with dual 4ohm VCs. Powered by a pair of P/A 1200w amps. The vehicle is a 98 Mazda P/U extra cab. My highs are awesome. What will give me the most Bass possible?

the gmax amps are only 2ohm stable. it is odd that they both blew at the same time but if the impedence is too low to amps will fail.dual 4ohm dvc subs wired in parallel should read around 2ohms. allthought impedence varies with frequency and isnt truly stable.

Well if it is not dual 4 ohm, i have never heard of a sub with dual 3 ohms. There must be something wrong with the voice coils and if that is not it, I dont know.

Hi mate very nice amp you got there here is the specs for it



Model: MA Audio HK401SX
Hard Kore Series 1800 Watt 1 Channel High Performance Class X Car Amplifier
1 x 1800W RMS @ 0.5 Ohm Mono
1 x 1200W RMS @ 1 Ohm Mono
1 x 650W RMS @ 2 Ohm Mono
1 x 500W RMS @ 4 Ohm Mono
Fully Unregulated MOSFET Power Supply
2 Ohm Stable @ Mono
1 Ohm Stable @ Mono
0.5 Ohm Stable @ Mono

if you have 2 12s just bridge them and you will have 650wrms at 2ohm running to them or one sub at 4 ohm 500w rms ps they should pump iam running 2 12s with just 360rms at 2ohm and they do the job good luck

Hello gonenutz14,

It depends on how you define the "best way". Driving each sub with a separate 750 watt amp will result in about 50 percent more power than having them share the output from a single 1000 watt amp. But with 2 amps, there's more wiring issues to contend with and the adjustments are more complex. The 2 750 watt amps will cost more than a single 1000. Plus if the 1000 watt amp is stable to 1 ohm, the power difference will actually be less than 50 percent because of the lower impedance. But if the 750 watt amps are also stable to 1 ohm and their outputs can be combined, we're back to 2 being better than 1.

I'd say that the simplest, most economical way is to use a single amp. If maximum power to the subs is the highest priority, and cost and wiring is not an issue, then 2 is better.

Hope this helps.

If there's only a single sub-out RCA cable, you have two options. The amp may have a manual switch that puts it in Mono mode, in which case you only use 1 of the 2 RCA jacks. The other option is to go get an RCA splitter. This will take your single sub-out cable and feed the exact same signal to both left/right of your amp. Either way, you get the same result. If the 1200W amp is for your sub(s) only, you should set the high-pass filter and subsonic filters to help your bass "hit harder" and cleaner.

Hello i_starling,

The Kicker L7's come in either 2ohm or 4ohm dual voice coil (DVC) versions.

Whatever amp they are connected to, you need to know both the impedance of your L7's and the impedance of your amp. The L7's dual voice coils can be wired to provide a total of four different loads:

2ohm coils in parallel = 1ohm load
2ohm coils in series = 4ohm load
4ohm coils in parallel = 2ohm load
4ohm coils in series = 8ohm load

Your best connection would be the one that results in a final impedance load that is supported by the amp.

Hope this helps.

Do you have ONE pair of 12's? Are they single voice coils? Dual? Bottom line, you are either over driving the amp (bass controll up high on the head unit (stereo), or the "load" on the amo is too low, meaning 2-12'" dual voice coils parreleled would give you a 1ohm load. Need more info, need to know what the bass is set on on your stereo, what size power wire to the amp, and I can wrap up the solution. ok?

Take care,
Larry T
Winona Lake, IN

Are they single or dual voice coil? Ohms?

You may have the speakers wired for the wrong impedance.

How many ohms per voice coil?

How many voice coils per speaker?

If the speakers are DVC, are the coils of each speaker wired in series or parallel?

Are the speakers bridged on the amp or one per channel?

you could try to wire the subs in a series which all positives are connected in a line from amp to pos of sub to pos of other sub , same for the neg.
heres sum extra reading materials:
http://www.crutchfield.com/ISEO-rgbtcspd/learningcenter/car/subwoofers_wiring.html