Speaker Sub JBL 728

Frequency Range (-10 dB): 27 Hz – 220 Hz
Frequency Response (±3 dB): 33 Hz – 220 Hz
Input Connection Modes: Switchable, +1/-1 or +2/-2
Internally selectable, Parallel or Discrete
Recommended Crossover Frequencies: 80 Hz, 24 dB / octave HPF
80 Hz, 24 dB / octave LPF
Power Rating
(Continuous1 / Program / Peak): Parallel: 1600 W / 3200 W / 6400 W
Maximum SPL2
: 136 dB SPL peak
Sensitivity (1w @ 1m): 98 dB SPL
LF Driver: 2 x JBL 2268H 457 mm (18 in) Nominal Impedance: Parallel: 4 ohms Discrete: 8 ohms x 2 Active Tunings: dbx DriveRack, all models. Enclosure: Rectangular, 18 mm, 13-ply birch plywood Finish: Black DuraFlex finish Grille: Powder coated, black, 16-gauge perforated steel with
acoustical transparent charcoal foam backing. Removable JBL badge and punched JBL logo. Input Connectors: Neutrik® Speakon® NL-4 (x2)m  Dimensions (H x W x D): 602 mm x 1067 mm x 838 mm (23.7 in x 42 in x 33 in) Net Weight: 76 kg (166.5 lb)Optional Accessories: SRX728S-CVR: Pull-over padded cover