This kit includes everything you need to correct a number of issues and take this speaker to another level across the board. Please see the videos and measurements in the accordion below. The kit includes all new parts, a set of tube connectors and new wiring.

Backplates differences:
Single plate: Plate with 2 holes for the included connectors for internal mounting of crossover: Thread
Pass through plate: Single hole for all wires for direct connection from external crossover to driver terminals.
Double plate: Plate with 4 holes +2 extra sets of tube connectors, allowing for removable external crossover.

This kit includes everything you need to correct a number of issues and take this speaker to another level across the board. Please see the videos and measurements in the accordion below. The kit includes all new parts, a set of tube connectors and new wiring.

Backplates differences:
Single plate: Plate with 2 holes for the included connectors for internal mounting of crossover: Thread
Pass through plate: Single hole for all wires for direct connection from external crossover to driver terminals.
Double plate: Plate with 4 holes +2 extra sets of tube connectors, allowing for removable external crossover.