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SETUP:
The A-BUS installation should be completed with all power modules connected but not installed into the walls. Follow these steps to give you maximum control flexibility over
the volume of your A-BUS system. On the back of the power modules there are trim pots (Left & Right) that fine tune the output level to compensate for the length of the cable
run, the efficiency of the speakers and size of the room. There are also situations where you may want to limit the output level in a particular room. With the trim pots adjusted to
minimum, the main volume control should be adjusted to maximum level, then with popular music playing the trim pots should be brought up to a point just below the amplifier’s
clipping level. (Clipping is the point where the sound starts to distort). When the trim pots are all set to the desired level the installation maybe completed.
VOLUME CONTROL MODULE
LOCAL INPUT MODULE
A-BUS/
READY
TRIM POTS
LEFT
RIGHT
R- R+
L+ L-
SPEAKER OUT
LEFT
SPEAKER
RIGH
T
SPEAKER
OI
DU
A
LEV
E
L
E
N
IL
O
IDU
A
L
E
VEL ENIL
TO
ADDITIONAL
HUBS
E
L
BAC R
E
KAEPS
D
E
R
AR
F
N
I
DER
AR
FN
I
RE
WO
P V42
R
EWO
P
V2
1
STANDARD SYSTEM
SOURCE2
AMP
SOURCE1
SOURCE2
SOURCE1
ELBAC 5-TAC
CAT-5 CABLE
ELBAC 5-TAC
ELBAC 5-TAC
OUT EXPANSION INOUT EXPANSION IN
A-BUS OUTPUTSA-BUS OUTPUTS
IR EMITTERSIR EMITTERS
LOCAL IRLOCAL IR
TATS
GIS
DNG
+ V
TATS
GIS
DNG
+ V
POWERPOWER
STATUSSTATUS
R AUDIO LR AUDIO L
TM
AMP
APS-40
IR
IR
IR
IR
IR
TV
PC
MP3
HUB
FAULT FINDING:
●Most faults occur as a result of incorrect wiring.
●Check all connections carefully.
●Make sure all speakers are wired in phase.
●Disconnect power modules from hub and check operation one by one.
●A short in a line or incorrect wiring will cause the power module to shutdown until the fault is
fixed.
●Status indicates the system is active. (LED indicator on infrared models only)
Infrared: Your A-BUS infrared relay system is world standard using the most up-to date technology.
However, some infrared codes may present problems. Make sure the infrared emitters are properly
placed on the IR receiver of the source components. Infrared systems are more likely to give trouble
as a result of too much power. (Try moving the emitter away from the component). Cable boxes and
Plasma screens often cause difficulties.
REMOTE CONTROL (ABR-40)
A-BUS miniature remote control included with ABUS-VC2RJ
Inputs Bu
ttons - Up/Down
Zone 1-4, off, All off
Battery 3
VDC Lithium CR2024
Dimensions 3.4
”(86mm)H x 1.3”(33mm)W x 0.3”(6.8mm)D
HUBS (ABUS-HUB1X2, ABUS-HUB1X4)
Inputs Audio - RCA phone jacks (1pr)
Power - 2.5mm DC (+v center)
Sta
tus - 2.1mm DC (+v center)
Expansion - RJ
-45 (ABUS-HUB1X4)
Outputs A-BUS ports - 4 RJ-45
IR - 4 x 2.5mm TRS jacks
Expansion - RJ-45 (ABUS-HUB1X4)
Wiring format 568A
Dimensions ABUS-HUB1X4
3.3”(83mm)D x 1.2”(30mmH x 7.25”(184mm)W
ABUS-HUB1X2
2.4”(61mm)D x 1.2”(30mm)H x 5.3”(135mm)W
Power Supply APS-40 (ABUS-HUB1X4) - 120-240VAC 50/60Hz 4A
APS-23 (ABUS-HUB1X2) - 120-240VAC 50/60Hz 2.3A
FEATURES AND SPECIFICATIONS:
VOLUME CONTROL POWER MODULES (ABUS-VC2RJ)
Speakers
Drives 1 pair of speakers (4/8 ohms)
Control Touch b
utton up and down
Remote controllable volume level
Remote control
included
Wall Plate Designed to fit Decora™ style wall plates
Terminals Input/CAT5 RJ-45 Output: setscrew terminal (up to
14ga)
IR 38
kHz and 56kHz
Nominal range in sunlight<15ft(5m), Indoors>60ft(20m)
Status System ON ind
icated by LED
Talkback LE
D flashes when in use
Dimensions 2.8”(70mm)D x 4.2”(107mm)H x 1.7”(44mm)W
LOCAL SOURCE INPUT MODULE (ABUS-LS1RJ)
Auto turn-on when local audio signal is sensed.
Auto return 30 seconds after audio ceases.
Inputs Local Audio - RCA phone jacks (1pr)
From Hub - Cat5 RJ-45
Output to VC p
ower module - Cat5 RJ-45
Dimensions 1.8”(25mm)D x 4.2”
(107mm)H x 1.7”(44mm)W
CABLE REQUIREMENTS - Interface VC power module to HUB use Category 5 (or equivalent) VC power module to speakers: up to 14-gauge recommended.
1
2
3
4
5
6
7
8
RJ-45 Connection Details
Connection shown:
flat side on top
push-clip on the bottom
push-cli
p
A-BUS by MTX AUDIO products purchased in the United States from an authorized MTX dealer are guaranteed against defects in material and workmanship for a period of two years from the date pur-
chased by the end user, and limited to the original retail purchaser of the product. Product found to be defective during that period will be repaired or replaced by MTX at no charge. This warranty is void if it
is determined that unauthorized parties have attempted repairs or alterations of any nature. Warranty does not extend to cosmetics or finish. Before presuming a defect is present in the product, be certain
that all related equipment and wiring is functioning properly. MTX disclaims any liability for other incurred damages resulting from product defects. Any expenses incurred in the removal and reinstallation
of products are not covered by this warranty. MTX's total liability will not exceed the purchase price of the product. If a defect is present, your authorized MTX dealer may be able to effect repairs.
Proof of purchase is required when requesting service, so please retain your sales receipt and take a moment to register your product online at mtx.com.