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The M-Audio® GSR18 active subwoofer adds serious low end to any full-range satellite speaker system. The 18” low-frequency driver and ultra-efficient Class D amplifier produce an impressive 500 watts of power for bass you can really feel. The variable crossover lets you dial in the perfect balance between the subwoofer and your full-range speakers for incredibly flat frequency response, while the phase invert button ensures that you get full, focused bass—regardless of stage position. The durable plywood enclosure and steel grille are designed to withstand the demands of constant use.
- designed by the engineers behind industry-leading M-Audio® reference monitors > pro-quality sound
- 18” low-frequency driver and Class D amplifier > 500 watts of powerful low end
- variable low-frequency crossover > easily tune sub for use with any full-range speaker
- phase invert button > always get tight, optimized bass in any room
- integrated 1.4” (36 mm) speaker stand receptacle > ideal for sub/satellite applications
- system type active 18”, bass-reflex-design subwoofer
- frequency response +/- 3dB 45–100 Hz
- frequency range 40–150 Hz (-10 dB)
- crossover frequency variable, 60–150 Hz
- system power rating 500 W continuous, 1000 W peak
- maximum SPL 129 dB
- nominal impedance 8 Ohms
- LF driver 500 W continuous at driver impedance
- LF driver size/type 1 x 18” (45.7 cm), 3.0” voice coil
- input stereo balanced XLR/1/4” TRS combo jack with XLR loop through output
- pole socket 36 mm pole mount socket on top (for full-range mounting)
- AC input 120–240 V, 50/60 Hz
- dimensions (H x W x D) 25.6” x 22” x 23.6” (65 cm x 56 cm x 60 cm)
- net weight 71 lbs

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