KRK S10.4 Powered Subwoofer 160watt active subwoofer featuring 10" glass aramid composite woofer The S10.4 powered studio subwoofer builds upon KRK’s legacy for sonic accuracy and performance. The custom-voiced, glass-aramid woofer delivers tight, defined bass, while the Class-D power amplifier dramatically increases transient response, control and punch. The four-position selectable crossover makes it easy to adjust the subwoofer setting to your existing monitors. Pairing the S10.4 with KRK or another studio monitors delivers an optimized listening and mixing experience with extended low end, while the exclusive bypass-control feature provides full range audio to the monitors without switching off the subwoofer. KRK's S10.4 subwoofer doesn’t just deliver precise bass and a rich feature set: it’s the next dimension in subwoofer performance. S10.4 Features 10" glass aramid composite woofer Bass extension to 28Hz with a max SPL of 117 dB Footswitch control enables/disables sub and crossover filter (footswitch not included) Curved design with front-firing bass port for placement flexibility Powerful, lightweight Class D amplification Optimized four-position crossover control Universal connectivity: XLR, 1/4" TRS, and RCA inputs and outputs Polarity and input sensitivity controls All-steel grill and 15 mm reinforced MDF enclosure provide maximum strength and protection Ground lift switch prevents ground loops       Configuration   Front Loaded, Vented Subwoofer System Type   Active Subwoofer Low-Frequency   10" Glass Aramid Composite Woofer Frequency Response   34Hz - 130Hz Max Peak SPL   117.2 dB Amplifier   Class D Power Output (Continous)   160 Watts @ 1% THD+N @ 44Hz Signal to Noise Ratio   92 dB Amplifier Distortion (THD + N)   ≤ 0.12% @-3dB Of Max Power Output 31Hz-110Hz Input Impedance   9.4 KΩ Balanced, 9.2 KΩ Unbalanced Ground Lift   On/Off Low Pass Frequency   28Hz-156Hz HPF Bypass   With Footswitch Only Footswitch   Optional Phase   0 or 180 Degrees System Volume   -30 dB to +6 dB Indicators   Power/Standby, Sub On/Mute, HPF Bypass Input Connectors   XLR L/R, 1/4" TRS L/R, RCA L/R, 1/4" Footswitch LFE Input   N/A Output Connectors   XLR L/R, 1/4" TRS L/R, RCA L/R AC Power Input   100VAC-240VAC Enclosure   15mm Reinforced MDF Finish   Black Vinyl Wrap Grill   Steel Perf Dimensions (H x W x D)   15" (382mm) X 14" (355mm) X 16.06" (408mm) Weight   34.5 lb. (15.6 kg)