Nady 3-Channel Amplifier Selectable internal Low Pass Filter can be adjusted from 50Hz to 250Hz to maximize the tight punch of your subs Filter / Source switch to enable the internal low-pass filter and use the left and right input signals for the subwoofer or to disable the internal filter to either use an external active crossover or use the Sub channel to pass full-range signals for monitor feeds or sound reinforcement Selectable Low-Cut Filter to minimize muddy bass and stage rumble Balanced XLR and 1/4" This 3-way amp allows you to power your left and right main speakers and your subwoofers, with no crossover necessary, all from one 2u rack chassis The 3WA-1700 easily powers four 8 ohm speakers for the stereo mains and two 8 ohm subwoofers with 450W of power per channel plus a whopping 800W for the subs! A perfect amp for DJ's, touring bands, or small clubs This 3-way amp allows you to power your left and right main speakers and your subwoofers, with no crossover necessary, all from one 2u rack chassis The 3WA-1700 easily powers four 8 ohm speakers for the stereo mains and two 8 ohm subwoofers with 450W of power per channel plus a whopping 800W for the subs! A perfect amp for DJ's, touring bands, or small clubs