Synergistic Research Black Box -

Had anybody used Synergistic Research Black Box ?

I will appreciate very much if previous users could give me your opinion on this product.

shkong7804-11-2019 9:42pm

ronrags Details Discussions Posts This discussion Message User 283 posts 11-16-2019 at 03:07pm Copy Comment URL Report Comment Edit Delete @ozzy Since you own both types of FEQ, is the X4 a sonic improvement over the original?