Hooking up DVC subs

To have 2x 2 ohm subs wired up, they either need to be wired in series or in parallel. In series, they will total as a 4 ohm load to the amp (or 5 ohms if 2.5 each) and in parallel, they will be 1 ohm (may be closer 1.25 ohms I think).
If this is a mono block (single channel) amp, I can't see that you will be able to wire them for a 2 ohm loan. You may have to wire them in series to be a 4/5 ohm total as the amp probably won't be 1/1.25 ohm stable.

If the subs you have are 2 ohm DVCs, that usually means each voice coil is 2 ohms. Putting the DVCs in parallel will make the sub 1 ohm, which is beyond the capability of the amp (which is only stable down to 2 ohms per channel). Putting each subs DVCs in series (for a total of 4 ohms per channel) will at least allow the amp to operate properly, even though you will not be able to maximize the output power.
http://www.interfireaudio.com/download/interfire_catalog_2009.pdf

It will depend on the capability of your amp. Each sub has dual voice coils (DVC). Each voice coil is (probably) 4 ohms. If your amp is a single channel, 1 ohm stable amp, you can connect all of the voice coils from both subs in parallel on the amp output. Other configurations will depend on the amp's number of channels and minimum resistance your amp can withstand.

Since it is a mono block amp, it depends on your subwoofer (s), and how you wire them to the amp.

Single 4 ohm sub would be just that, 4 ohms.
Single dvc 4 ohm sub, with both voice coils wired parallel would be 2 ohms.

2 dvc 4 ohm subs wired parallel would be a 1 ohm load.

Ok, your post has two different models listed. Let's start with something you need to know about your amplifier. Is it one ohm or two ohm stable. This will make a difference. Also, whether your subs are single voicecoil (HFI12s4) or dual voice coil (HDI12d4).

Let's start with the easy scenario. Let's say your amp is two ohm stable and you have two single voice coil subs. It's simple. You go from the positive of the amp to the positive of both subs and the negative of the amp to the negative of both subs. This will provide a 2 ohm load to the amplifier, thus pulling all the power out of it.

Unfortunatley, if you have two dual voice coil subs, you won't be as efficient. You will only have the options of a 4 ohm load or a 1 ohm load.

This is where having a one ohm stable amp would come in handy. If the amp is one ohm stable, hook the positive of the amp to all 4 of the positives on the subs, and hook the negative of the amp to all 4 negatives of the subs. This produces a 1 ohm load.

WARNING!! If you have a 2 ohm stable amp DO NOT use the last wiring scenario. It will fry your amp.

Now, the last is a little trickier. This is for two dual 4 ohm subs. Follow closely. Hook the positive of the amp to one of the positives of each sub. (do the next step to both subs) Go from the negative of the voice coil that you hooked positive from the amp is hooked to, and hook that to the positive of the unused voice coil. Then go from the negative of that voice coil and hook to the negative of the amp. Make sure this is done on both subs. This will give you a 4 ohm load.

Hope this helps

OK. Sometimes manufacturers put two flat prongs to each of the positives and negatives of the voice coils. This allows for daisy chaining multiple subs to be easier. Here is how you want to wire your subs in the box.

From the positive post of the box to the positive posts of both voice coils (just choose one prong on each of them, you do not have to connect all 4 of them). So you will have 2 wires going from one post on the box to 2 posts on the sub. Got it. Not go from the negative post on the box, to both negative posts on the subs. Repeat this with the other sub. Now you can hook each channel of the amp to the box regularly pos of amp to pos of box and neg of amp to neg of box.

This set up is called parallel and will drop the ohms resistance of two 4 ohm voice coils to a 2 ohm load. You will get 2 ohms for each sub, thus connecting one sub to each channel. This will allow you to get the max power out of the amp or 150w RMS per your post. Hope this helps.

Depending on the PA FUBAR you have. The voice coil on those subs are DVC. Dual Voice Coil. You need to know a couple things. What kind of amp are you going to run on it. And what is the resistance (OHM) rating of each voice coil. MY two 12's are dual 4 ohm. Meaning that there are essentially 4 speakers to hook up. My amp currently is not 2 ohm stable in bridged. So what I did is run each speaker in parallel (red2red,black2black) then run to the box terminal. So now the dual 4 ohm voice coils are basically 2 ohm. I have 2 speakers. Now I hook the box up in series. To bring the now two 2 ohm speakers into one 4 ohm speaker. This is called series/parallel setup. My amp sees this box as 1 channel @ 4ohms. The downfall to this is the output of the amp is divided up into each speaker. So instead of sending all 1400 watts to one sub. I will send 700 to each sub. But here is a catch. even though each speaker is half the total wattage it will still be 3db louder. Meaning it will be as loud as 1 sub running 1400 watts. To conclude i need to know how many of those subs you are going to run on the amp.. And the model number of the amp so I can match up your wiring.

are these subz dvc or svc subz. and dont be afraid of the one ohm your amp will do what it needs if you bridge it to mono. Or your subz are actually drivers,if so 500 watts will just get laughed at by those speakers

try wiring them differently. here is a link for u to go to http://www.crutchfield.com/learn/learningcenter/car/subwoofers_wiring.html . once there find your amp configuration (ie. mono, or 2 channel) then down to the type of subs an how many subs ( ie. 2 dvc (dual voice coil) 4 ohm subs) an that will show u how the subs should be wired and wired to the amp.

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