Tantric HDD 15 experience wanted please?

[UKSQguy]

Hi guys,

We have sold off the three GZ 12's we had in the back of our renault megane, and replacing it with a tantric HDD 15. Main reason for changing is to drop into a certain competition catagory. 2nd motive for the tantric is there aren't many over here so will be pretty unique at shows. We will be driving it with a GZ 4k amp and have up to about 6 cubic ft to play with. Id like to hear from people who have run these woofers and can offer some real world experience on how they did.

Thanks in advance!

Gav