What are the differences between the STF and the VTF subwoofers?

Variable tuning allows you to choose how deep your subwoofer plays, on-demand. Choose between a music mode (lower bass extension) or a home theater mode (higher headroom and more impact) in just a few seconds. Subwoofer designs involve tradeoffs – one cannot optimally design a subwoofer to play low deep notes, and at the same time play loud. Usually the designer chooses a tradeoff for you. With the VTF series, we build in flexibility so that the listener has uncompromising control. • STF – Single Tuning Frequency. The bass characteristics are fixed. • VTF – Variable Tuning Frequency. The bass characteristics can be varied between lower extension (‘music’ mode) or higher headroom (‘home theater’ mode). ... more