The product is a modification for the Polk LSi15 speakers, designed by VR3 Mods.   

Clarity cap csa Jantzen mox resistors Mundorf electrolytic bypass by clarity sa Jantzen and ersa inductor Point to point Laser cut substrates

Most owners install with industrial velcro in the cabinet slightly above the woofer. Can also use a drill with right angle attachments.

Includes aluminum terminal plates and insulated gold plated binding post

2 mo to 3 mo lead time