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Introduction
LCAi220
The LCAi220 is an in-wall local zone amplifier that switches between a central audio source
(whole house audio) and a local source (TV, CD player, etc.). In the standby mode, the local
speakers are amplified by a centrally located distribution amplifier. When an input signal is
detected from either the local high level, low level, or the 12v trigger/video in inputs, the
LCAi220 switches on and the speakers switch over to the LCAi220’s high quality amplifier.
The LCAi220 provides a simple, easy to use way to have multi-source audio in any room. Its
compact, in-wall design allows the LCAi220 to fit easily behind a flat panel TV. The LCAi220
mounts in a two-gang wall box with all speaker connections located behind the unit and the
local source inputs and controls located on the front. The end result is an unrivaled
combination of installation ease and performance, and with its auto source switching makes
the LCAi220 literally invisible to the end user.
The Technology Inside
Amplifier
The amplifier used in the Boston Acoustics LCAi220 is a high performance class A/B amplifier
delivering sound quality equivalent to the finest multi-room/multi zone amplifiers or receivers.
Low V
oltage Power Requirements:
The LCAi220 features two separate power inputs, one on the front for use with the supplied
power supply and a second located on the rear panel for a centrally mounted power supply.
Since the LCAi220 can operate with 12vdc to 16vdc power, it can be used on the same power
source as many other devices used in home audio installations today allowing an installer to
mount a central power supply and route power to many separate locations.
Local Source High and Low Level Inputs:
The LCAi220 features both high (speaker level) and low level (RCA) inputs allowing for
connection to almost any local audio source.
Adjustable Input Level:
The LCAi has a fully adjustable gain to match the output of the LCAi220 to the central music
source.
Highpass Filter:
The LCAi220 features an adjustable highpass filter for the local speakers. Selectable between
Flat (no crossover engaged), 30Hz @ 12dB, and 100Hz @ 12dB. This is especially useful if using
the LCAi220 with small speakers or with a subwoofer. The highpass is only active when used
with the local zone.
Subwoofer Line Output:
The LCAi220 features a dedicated low-level subwoofer output. The subwoofer output is derived
from both the local source being amplified by the LCAi220 and the whole house system. The
signal from the subwoofer output is a mono signal lowpassed at 85Hz @ 12dB per octave.
Fault Detection / Pr
otection:
The LCAi220 features active circuitry to protect itself against a potentially hazardous situation.
If a fault state is detected, the LCAi220 will go into protection mode and the fault LED will
illuminate.
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