Colunas graves novas dentro caixa nunca foram usadas. dB Tech Sub 618

Active Subwoofer
1 x 18" Bass reflex subwoofer
Power: 600 W RMS, 1200 W Peak (Class D digipack)
Frequency range: 35 - 130 Hz
Max. SPL (sound pressure level): 133 dB
2 XLR inputs
2 XLR outputs
Stereo crossover
56-Bit DSP with 2 presets
Convection cooled without fans
Dynamic limiter
M20 Stand flange mount
Dimensions: 500 x 625 x 690 mm
Weight: 31.1 kg