With 2 ohm dvc a sub can output either a 1 or 4ohm load.therefore with 2 subs you end up with 2ohm or 8ohm load.Of course you'll use the 2ohm connection which is this.....
Take one sub and connect the (-) with the other (-) and the (+) with the (+).
Do the same with the other sub.Each sub now carries out a 1ohm load and you end up with 2 pairs of cable.Now take one(+)and put it on the amp.Take the (-) from the OTHER pair(this is critical) and connect it on the amp.You will still have a(-) from the first pair and a (+) from the other pair!Well....connect them together!!!Thus you'll have a 2 ohm load on the amp!
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Run the amp in stero Run the 2ohm to one chanel, Wire the dvc 4ohm to run 2ohm + to + - to - to the other chanel and you should be fine.
If you had a 1ohm stable amp you could run both speakers wired 2ohm to a mono amp and have a 1ohm set up and double the power!
The MTX Thunder 1501D is stable at 1ohm and outputs 1,500 watts RMS into that impedance. An L7 with 2ohm DVC's would present a 1ohm load if wired in parallel and would allow the amp to produce more power than into the 4ohm series load. The problem is that the L7's maximum power handling rating is only 1,000 watts RMS, so if you wire the coils in parallel, you'll very likely overdrive the sub and perhaps damage it. Now, if you bought another L7 and ran the voice coils in series and the subs in parallel, that would be a 2ohm load and well within their power handling capability.
With that amp and sub, I'd recommend leaving the voice coils in series.
Run the subs in series then bridge the amp. So run the normal + to - to the one sub then hook up a spare wire (not connected to the amp) to the same + and - connections. Then run the spare wire to the + and - of the other sub. This will tie the 2 together so you can bridge the ampfor more power instead of using 2 seperate channels.
huge shared common space slot loaded box (size depends on sub 10", 12" 15" you need to clarify that please) the amp specs on earthquakes site say the phd5000 is rated at a max output of 5k watts at 1 ohm 3k watts at 2 ohm so, with 3 dvc 2 ohm subs you only have 3 options of which only 2 will be a usable solution:
1. 3- 2ohm dvc series at sub parralel at amp = about 1.33 ohms at the amplifier this is the best option to get the most power to the subs as each sub will produce a 4 ohm load then wire each one to the amp the amp sees 3 4 ohm parralel loads which = 1.33 ohm so based on the amp specs you would be close to 1200 watts per sub.
2. 3- 2ohm dvc wired in series at sub and all 3 subs series wired together very difficult to wireand will give you a 12 ohm load which is next to no power at all (not a viable solution)
3. 2- 2ohm dvc parralel wired to each other and then at amp the amp sees a 1 ohm load and makes 5k watts max but you can only (REREAD THAT LINE! ONLY USE 2 SUBS IN THIS WAY) WHICH GIVES THE MOST POWER BUT ONLY USES 2 SUBS