MDADZHMSE A-BUS Multi-Source Audio Expansion Hub
AUDZBX75 Source Input Module
The MDADZHMSE Multi-Source Audio Expansion Hub is similar to the MDADZHMSE Multi-Source
Audio Hub and connects directly to it. The MDADZHMS Multi-Source Hub has two ABX Outputs for
connection to the MDADZHMSE Expansion Hub; one for Audio [2] and one for Control [4]. The MDAD-
ZHMSE has corresponding ABX Inputs and Outputs for accepting inputs from an MDADZHMS Multi-
Source Hub and extending outputs to an adjacent MDADZHMSE Expansion Hub. Up to three MDAD-
ZHMSE Expansion Hubs can be daisy-chained to expand the system to a maximum of sixteen zones.
CAUTION: The ABX ports are used strictly to interconnect MDADZHMS/E Hubs and may not be
used for any other purpose. The jumper cables used to interconnect ABX ports between any
two hubs must not exceed 1m in length or else system performance may be compromised.
Installation
– The AUDZBX75 Source Input Module installs wherever it is desired to locate an
audio source component that will be used as an input to the A-BUS Multi-Source Audio System.
Typically, Source Input Modules are located in the entertainment center, family room, kitchen,
master bedroom, office or utility area or other areas where computers, cable boxes, satellite
receivers, media bridges and/or televisions are located. It is best to locate the actual module in a
single-gang box near, but not directly adjacent to, a power receptacle. The AUDZBX75 Source Input
Module may be located up to 100ft (30m) away from the MDADZHMS Hub. The A-BUS System
uses Cat 5/5e wiring following the TIA 568A color code (see A-BUS Wiring Color Code).
Input Level Adjustments
– On the back of the AUDZBX75 [7] Source Input Module are Left and Right
Input Level Adjustments. Normally these are set to the full clockwise position. Turn each control
counterclockwise to reduce the input level to match the volume level of the lowest source in the system.
Repeat this procedure for any other sources that are too loud, until all sources are balanced. Some
audio sources such as computer sound cards may have very low output. In these cases it is recom-
mended that the volume be turned up at the output of the source. Check for either a physical volume
control or an IR remote volume control on such devices.
The A-BUS Multi-Source Audio System allows for up to four sources to be heard in up to sixteen zones simultaneously.
Source Equipment (with loop-out)
MDADZHMS/E
AUDZPS40
MDADZHMS/E
Multi-Source Structured Wiring Hub
MDADZHMS/E LCA 2004
AUDIO
OUT
DATA
1
2
3
4
A
B
1
1
