Bass Optimizer Speakers Replaces our previous flagship VTF-15H

Replaces our previous flagship VTF-15H MK2:

HC-1 and HIW-1 were not his designs)

unbalanced RCA and high level inputs for greater flexibility

Most people take the volume knob controlled line-level output from their Preamp and run that into the High End Crossover

Bass Optimizer Speakers Replaces our previous flagship VTF-15HSpecial Note: The Bass Optimizer is only meant for our older passive cylindrical subwoofers. This is no longer necessary on our current powered subwoofers. The reason for the bass optimizer is that TN series tube subwoofers are all overdamped bass reflex systems that need special equalization for flat extended bass. They also need infrasonic filtering to keep bass frequencies they cannot handle out of them. To date, you need to get our amplifiers or