Helix AAC.3 HP

Max. speaker input level25 Volts (= 155 Watts / 4 Ohms) Input impedance13 Ohms Max. output level4.0 Volts Frequency response18 Hz - 80,000 Hz Max. current for remote output200 mA Operating voltage7 - 18 Volts Dimensions (H x W x D)77 x 37 x 20 mm / 3.03 x 1.46 x 0.79″.