The LSR2310SP Powered Studio Subwoofer is based on a 10 long excursion woofer and a 180 watt power amplifier. Added to a stereo system it extends the low frequency response of the system below 30Hz. In a surround sound system the sub provides stunning reproduction of the LFE (low frequency effects) channel. The LSR2310SP is packed with professional features including two sets of balanced XLR 1/4 and unbalanced RCA input connectors selectable crossover settings and two sets of balanced outputs to allow connection of Left and Right main speakers. A detented level control allows independent adjustment of the subwoofer output to balance the subwoofer in the system. Frequency Range : 28 Hz - 2kHz Max SPL Continous : > 104 dB Max SPKL Peak : > 113 dB Drivers (LF) : 10 (254 mm) 230H Input Connectors : L&R: Balanced XLR 1/4 TRS RCA Output Connectors : L&R: Balanced XLR 1/4 TRS Selectable Crossover : 80 Hz / 120 Hz / External Amplifier Power : LF:180 W Input Sensitivity : 92 dB SPL / 1m@ -10dBV Balanced Input(80 Hz Crossover) Enclosure : 18 mm (3/4 in) MDF Finish : Metallic Anthracite Pain / Dark Matte Black PVC Dimensions (H x W x D) : 415 mm x 381 mm x 438 mm (16.12 in x 15 in x 17.25 in) Net Weight : 20.7 kg (45.5 lb)