I have a punch 800a2 and 2 jl 12w3 dual 6 ohm, should it be ran as 6 ohm,or i can wire for 1.5 ohm but is this amp stable for 1.5 ohm load? and how should i wire it if i just wanted to bridge it? thnx please help!! :(
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In playing the math game in audio, I would recommend wiring them in series. This way you can take them down to 3 ohms and still maintain a usable impedance on the amp. Plus you'll get the added benifit of actual usable output.
Taking most amps into a higher impedance (in parrallel it would be 12 ohms) you might over stress the amp (trying to get reasonable volume from your setup) and then trip the MOSFETs (or whatever their using today). Not that this will ruin the amp, but repeated tripping of the current reading ICs will eventually render the amp useless.
All being, most car audio is designed to be stable at 2 ohms anyway. My biggest peave with that is that sonically, 2 ohms slaps the speakers instead of driving them, not to mention limiting the actual headroom.
You need to wire them according to the limitations of your amp you can pull a 1 ohm overall load just by connecting all of your coils in parallel- or you can get an overall load of 4 ohms by wiring each sub individually in a series configuration which will yield a 12 ohm load per sub -and then wire the 3 sets in parallel which will bring your ohms back down to 4. You can do a lot with that many coils it depends on your amp really-ideally a 1 ohm stable class d mono amp that is 1000-1500 watts rms would knock the **** outta those things JL is the good stuff.
Unless your amp is stable below 1 ohm, there's really only one wiring solution. And that is to series the voice coils making each sub 8 ohms, then parallel all 3 subs to the amp for a 2.67 ohm load. If you parallel the voice coils and then parallel the subs, the impedance will be 0.67 ohms, much too low for most amps.
You could parallel the voice coils and then series the subs for a 6 ohm load, but the amp won't put as many watts into a 6 ohm load. Most are optimized for 4 ohms or 2 ohms. And it's not good to run subs in series anyway.
Your PSW815 has 2 ohm dual voice coils allowing you to better match the impedance to your amp. Each voice coil is 2 ohms. If you wire them in parallel (both +'s together and both -'s together and then to the amp terminals), the sub presents a 1 ohm load which is too low for most amps. Wiring the voice coils in series (one + to the other - and the remaining + and - to the amp terminals) results in a 4 ohm load.
This link shows the wiring diagram for both options. If you know for sure that your amp is 1 ohm stable, use Wiring Option #1. If the amp is not 1 ohm stable, use Wiring Option #2.
You can't run parrallel on 3 single voice coil subwoofers. If you run all the negatives from each coil and possitives from each coil to one terminal you will be dividing the ohms by 3. I don't think JL ever made a single voice coil 2 ohm subwoofer though. If you ran a parrallel on 3 8 ohms you would be at 2.7 ohms. 3 4 ohm would put you down to 1.3
Run a Jumper from coil 1 + to coil 2 + and a jumper from coil 1 - to coil 2 - and then run + from coil 1 to amp and - from coil 2 to amp. This will put your load to 3 Ohm and that will give you the most power. You could get more by going to 1 ohm but I don't think the mtx amps are stable at 1 ohm.