The Boston Acoustics LCAi220 is an in-wall local zone amplifier that switches between a central audio source (when connected to a whole house audio system), and a local source such as an iPod or TV. In standby mode, the local speakers are amplified by the whole house amplifier. When an input signal is detected from either the high/low level inputs, or a 12V trigger/video input, the LCAi220 becomes a high quality Class AB local amplifier for in-room speakers. A built-in 12 dB/octave high pass filter can be set to 30 Hz or 80 Hz for when a local subwoofer is present. Built into the back of the amplifier is a 12 dB/octave 80 Hz low-pass filtered subwoofer line level output. In-wall frame and power supply included. RoHS compliant.
2 x 20W Class AB in-wall amplifier
Phoenix-type speaker terminals
Operates on 12-16 VDC with front and rear power inputs
Built-in high pass and low pass filters
Fault detection and protection
Specifications:  Power output: 2 x 10 watts RMS (0.04% THD @ 8 ohms), 2 x 20 RMS (0.04% THD @ 4 ohms)  Signal to noise ratio: Greater than 95 dB  Trigger input: 3-30 VAC/VDC  Trigger output: 12 VDC, 200 mA  Power requirements: 12-16 VDC, 2.5 A

Included power supply specifications:  Input power: 100 to 240 VAC, 50-60 Hz, 1.8 A  Power output: 16 VDC, 3.12 A  Certifications: UL, cUL, CE, FCC, and TUV.

Note: It is not recommended that the LCAi220 be installed near light switches, dimmers, or other 110 VAC electrical components due to induced noise potential. All wire runs should use CL2 rated 18 AWG wire or larger. Use of an electrical junction box is required (not included).