Portable Systems We use True Channel Count (TCC) on all Guardian Audio mixers. A mic channel consists of a minimum of an XLR input, EQ and level control. A stereo channel consists of a minimum of a pair of input jacks, EQ and level control. ABS10A »click for larger image« The ABS10A active system has a mixer section with a microphone and line input, and can be used as a stand alone portable PA system. This Front Of House / Monitor speaker system has a 10" cast frame woofer, 1.375" titanium high frequency compression driver and a speaker out jack to power an ABS10 or other 8 ohm speaker. Power Amp: 150 watts (250 watts with an ABS10) Frequency Response: 50Hz - 20kHz Sensitivity: 97dB (1w/1m) Voice Coil: 3" Magnet: 50 oz. Speaker Protection in the Crossover Recommended mate: ABS10 Shipping Weight: 36 lbs.