Technical SpecificationsSpeaker name SUB 250 SUB 300 SUB 550 SUB 650System Slotted Bass reflexPortSlotted Bassreflex PortSlotted Bassreflex PortClosed CabinetWoofer 8” down firing 10” down firing 10” down firing 12” front firingPeak power [W] 250 300 550 650Frequency range [Hz] 30-150 +3dB 28-150 +3dB 26-150 +3dB 24-150 +3dBImpedance [Ohm] 22 kOhm 22 kOhm 22 kOhm 22 kOhm12 V trigger No no no yesPhase Yes, variable Yes, variable Yes, variable Yes, variableCut off frequency [Hz] 40-150 40-150 40-150 40-150Limiter Yes yes Yes yesBoundary Gain. Comp. No No Yes, switch Yes, variableOuter dim. HxWxD [mm] 325x266,5x468,5 378x310x507 396x325x530 419x400x418Internal volume [l] 30 39 45 45Weight [kg] 13