Or an angle grinder with care

 

What are the voice coils on your HDC3's?

 

Voce coil its D2

 

Make sure you are not wired down to 1 ohm cause your amp is not 1 ohm stable

 

I'm weird pos to pos and neg to neg then out that should give me 2 ohm right??

 

a dual two ohm sub can not have a final 2 ohm load. it will either be 4 ohm or 1 ohm. wire it like the second picture or you could risk ruining your amp.

 

 

You beat me to the punch there

 

So what's the best way to run this sub d2 sub

 

With your current amp, you have to wire it for a final load of 4 ohms.

If want more power from your amp then you would have to get a dual 4 ohm sub.

If you want to keep the sub then you would have to change the amp and get one that would be stable down to one ohm.