SVS PB-4000 13.5" Ported Box Home Subwoofer - Gloss Black 4.5" inceiling speakers Controlled Playback Speeds - Electronically

Controlled Playback Speeds - Electronically controlled precision speeds

and that shows in the feature set

Six TI OPA1612 op-amps

However you listen

Low Frequency Driver: Dual 6

SVS PB-4000 13.5" Ported Box Home Subwoofer - Gloss Black 4.5" inceiling speakers Controlled Playback Speeds - ElectronicallySVS PB4000 A ported subwoofer with a 13. 5" driver and a 1,200 Watts RMS power amplifier. The SVS PB4000 ported subwoofer has the most powerful and flexible Bluetooth controlled DSP app, works with both iOS and Android operating systems. Specifications Premium Black Ash and Piano Gloss Black finish options Protective non resonant steel mesh grille Front firing 13. 5" driver Rear mounted amplifier Screw in rubber feet Robust Medium Density Fibreboard