Anyone familiar with the Matrix Line driver... i have 1 connected to 3 alpine mrd 650's that power 3 12" type r .... their in a sealed box and i dunno for some reason i don't get that super loud power as i should.... i'm thinking that the matrix is cutting power because evevn as i turn the volume on my deck up there really isn't that much significant bass.... the subs face up and built in a custom box for a 2001 eclipse.