How do you get 2 ohms from four 4 ohm voice coils? Unless you drive them with a stereo amp or don't use them all?...

 

If he drops into a qualified shop, he can have it all checked out before getting an amp to power them properly.

 

That wasn't his question . . . his question was about basic electronics. How is it possible to get two 4 ohm DVC subs to run at 2ohm? It is not electrically possible no matter how "qualified" a shop is. The possible final loads for his subs are:
16 ohm, 4 ohm & 1 ohm . . . unless he gets a stereo amp (but that's a different discussion) then he'll have 8 ohm & 2 ohm options

 

He said that he's got dual 4 ohm voice coils. That's a 1 ohm load in parallel where I come from. Therefore a 1 ohm stable amp would do justice to them. As for why they were wired at 4 ohm's I guess they had a stereo amp running them.
To be sure, putting them on a meter is always suggested prior to testing an amp on them.

 

Arent all Type R's dual voice coil? probably most of the newer models. anyways, yeah mine is DVC

 

Yes they were and are, but, some were made in a dual 2 ohm configuration.
Maltesechicken is correct with the electrical information as to what possibilities there are with a dual 4 ohm system. To be sure, always check first. It's the inexpensive way.