sub, amp, head unit?

 Here a thought. Is your amp 2 ohm stable. If it's not and you have a 4 ohm dvc the guys at the shop may have wired to 8 ohms. I think that would make a difference in output.

This enclosure is only available with a 2 ohm dvc sub. He will therefore either have it wired into 1 ohm or 4 ohms and it is likely it is wired into 4 ohms because it is wired this way at the factory. I think he really just needs a bigger amp.

Last question: my amp now is running at 4ohms. If the sub was wired for 2ohms or 8ohms what would happen? Would any sound come out? If the sub is currently working with the 40hm mono amp does that mean its definitly wired for a 4ohm load?

thx

That's where I got confused. Subarb said 4 ohmdvc originaly and meant 2 ohm. A 2 ohm dvc means it's probably wired to 4 ohms. Personally I wouldn't think it's the amp. I have enough experiences to know how important the input power is.