CLASS G AMPLIFIER FEATURES • Bi-amp design with discrete output stage for both the woofer and compression driver • 4th order electronic X-over and multi-stage custom equalization • Proprietary efficient class-G amplification on LF channel • Subsonic filter: 12dB/octave • Built-in compressor/limiter • Balanced XLR input (Left and Right on ACTPRO18S Sub) • Balanced XLR full-range output (Left and Right on ACTPRO18S Sub) • Left and Right balanced XLR high-pass outputs on ACTPRO18S subwoofer • 0-1800 Phase switch on ACTPRO18S • 100Hz 18dB/octave low cut switch on full range models • Ground lift switch • Full thermal & short circuit protection • Large heatsink with convection cooling • Oversized toroidal transformer • LEDs for Power, Protect, Limit and Signal • 115V/230V 60Hz/50Hz selector switch Cabinet features • Made in U.S.A. using advanced CNC routers • 5/8” birch plywood construction (ACTPRO12M, ACTPRO15, ACTPRO1515) • 3/4” birch plywood construction (ACTPRO18S) • Main & monitor sitting positions (ACTPRO12M) • Reinforced internal bracings • Environmentally friendly WarneckeTM scratch resistant black paint finish • 16-gauge wrap-around steel grilles • Metal handles and rubber feet • Rubber strips (ACTPRO12M) • Metal pole mounting cup (ACTPRO1515 excluded) • Front logo illuminated with blue LED Loudspeaker components Compression Driver • Celestion 1”-exit with PETP film diaphragm Constant Directivity Horns • 90 x 40 constant directivity horn (ACTPRO15 & ACTPRO1515) • Conical wave guide (ACTPRO12M) Low Frequency Transducers • Vented magnet assemblies for advanced cooling • High temperature copper-wound voice-coil on polyamide former for increased reliability • Celestion SP-1200 (ACTPRO12M) • Celestion SP-1500 (ACTPRO15 & ACTPRO1515) • Proprietary SP-1804 cast frame subwoofer (ACTPRO18S) PETP-Film diaphragm compression driver • Sophisticated computer modeling was used to optimize the magnetic and acoustic design of