Roemtech DMA-355H User manual

List of Contents
+
1. Digital Mixer Amplifier
Stereo/Mono - 55 Watts
2. Regulated 60 Watt Power
Supply & 5’ Power Cord
3. Amplifier Mount, Mounting
Screws & Washers
4. Speaker Terminal Block
5. Universal Dual Band IR Receiver
6. IR Remote Control
7. Phillips Mounting Screws Wood
Screws x
2 each
M6
16 & 25mm
1 each
M8
20 & 30mm
1 each
M8
Spacer
1 each
Instruction Manual
DMA-355H
www.roemtech.com
™
For Technical
Assistance Call
972-221-3030
The unique patent pending
TV bracket is designed to bolt
onto the back of a flat panel display.
The bracket should be compatible with
most wall mount TV brackets. Once it is
bolted down securely, it will provide a reliable
and secure way of mounting the amplifier to the
back of most flat panel displays.

INPUTS
MIC/
LINE
MIC/
LINE
OPTICAL
1 2 3
OUTPUTS
LINE
LEVEL
SUB
PWR
24V/2.5A
SPEAKER
4Ω - 16Ω
L+ L- R+ R-
Features
INPUT 1
MIN MAX
INPUT 2 INPUT 3
MIN MINMAX MAX
HUMMBUSTER HUMMBUSTER REMOTE IR IN
ON OFF ON OFF
MIC
LINE
MIC
LINE
MASTER
VOL
+
-
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12 13 14 15 16 17 18
Hidden Features
IR Programming VOLUME UP Step 1 - Hold down the Master Vol + and - simultaneously until the LED
turns . Step 2 - While the LED is , push the + button once, (LED will flash once every yellow yellow green
2 seconds). Step 3 - Push the “volume up” button on the remote, LED will flash twice to confirm, green
then back to solid . If LED flashes twice, the command has not been accepted. Note - the blue red
included Roemtech remote will always be recognized by the amplifier.
VOLUME DOWN Repeat Step 1. Step 2 - While the LED is , push the - button once, (LED will yellow
flash twice every 2 seconds). Step 3 - Push the “volume down” button on the remote, LED will flash green
green three times to confirm, then back to solid . If LED flashes three times, the command has blue red
not been accepted.
MUTE Repeat Step 1. Step 2 - While the LED is , push both buttons once again briefly, (LED will yellow
flash three times every 2 seconds). Step 3 - Push the “mute” button on the remote, LED will flash green
green four times to confirm, then back to solid . If LED flashes four times, the command has blue red
not been accepted.
Mono/Stereo STEREO Note: The amplifier is configured in a stereo mode from the factory. This step
will only be necessary if the amp has been switched to Mono and you wish to set it back to Stereo. Step 1 -
Make sure the amplifier is unplugged. Hold down the Master Vol + button. Step 2 - While still holding
down the Master Vol + button, plug in the power cord. The LED will flash four times indicating the green
amplifier is set to stereo.
MONO Step 1 - Make sure the amplifier is unplugged. Hold down the Master Vol - button. Step 2 - While
still holding down the Master Vol - button, plug in the power cord. The LED will flash four times yellow
indicating the amplifier is set to stereo.
EQ Settings There are five EQ settings, four are preset and the fifth is customizable via the “Input
Volume” knobs 2 (lows), 5 (mids), 7 (highs). To access the EQ mode, hold the Master Vol + and -
buttons simultaneously until the light turns . Tapping the + or - buttons individually will scroll through pink
the different EQ modes. EQ 1 is flat (LED flashes once every 2 seconds). EQ 2 is a bass boost (LED pink
flashes twice every 2 seconds). EQ 3 is a bass and treble boost (LED flashes three times pink pink
every 2 seconds). EQ 4 is a treble boost (LED flashes four times every 2 seconds). EQ 5 is pink
customizable (LED flashes and alternately). In this setting you can use the three volume pink blue
knobs to adjust the tone. Note: Top dead center for each knob indicates flat EQ setting. Once you have
the desired EQ setting push and release the + and - buttons simultaneously, the LED will flash pink
indicating that the EQ is now set. The volume of each input will slowly adjust to the last position of the
volume knobs.
910
9
9
Input 1 Override/Passthrough Input one can be set to override inputs 2 and 3 while passing
through its’ own audio. Simply hold the Master Vol + and - buttons down simultaneously while
moving the “Mic/Line” switch from “Line” to “Mic” and then back to “Line” immediately. Without letting
off the volume +/- buttons, turn the “Input 1” knob slowly from the “Min” to the “Max” position until the
LED turns from to , this will set the sensitivity for the override signal. To cancel this feature, white red
repeat the above process although you will not need to turn the “Input 1” knob. This feature only works
with line level signals. The LED will continue to blink during an override event.white
9
1
2

Features Explained
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Mic/Line: Switches Input 1 to either balanced mic or unbalanced line level. Also
used for hidden features, see “Hidden Features” section for more information.
Input 1: Volume control for Input 1. Also used for hidden features, see “Hidden
Features” section for more information.
HummBuster: Switches HummBuster® on or off for Input 1.
Mic/Line: Switches Input 2 to either balanced mic or unbalanced line level.
Input 2: Volume control for Input 2. Also used for hidden features, see “Hidden
Features” section for more information.
HummBuster: Switches HummBuster® on or off for Input 2.
Input 3: Volume control for input 3. Also used for hidden features, see “Hidden
Features” section for more information.
Remote In: 3.5mm jack for IR pickup for 3.3V sensor.
Master Vol +: Pushbutton for increasing master volume. Also used for hidden
features, see “Hidden Features” section for more information.
Master Vol -: Pushbutton for decreasing master volume. Also used for hidden
features, see “Hidden Features” section for more information.
LED: RGB LED indicates blue for good power. Emits multiple colors for mode
setting and other functions. Also used for hidden features, see “Hidden Features”
section for more information.
Input 1 Jack: Accepts either mic or line level inputs via 3.5mm, 3 conductor plug.
In “Line Level” mode only, can also be set as a priority override.
Input 2 Jack: Accepts either mic or line level inputs via 3.5mm, 3 conductor plug.
Input 3 Jack: Accepts standard optical/Toslink input. Mixes with analog inputs.
Line Level Output: Outputs line level, 3.5mm, stereo, post mix, pre EQ audio.
Sub Output: Outputs line level, RCA, mono, post mix, pre EQ audio, 20Hz-
20kHz. Can also be used for a mono line level out for general audio.
Speaker: Speaker level out. Mono or Stereo, see “Hidden Features” section.
Power: Takes 24V, 2.5A DC, center pin is +.
Important Note: The optical input on this amplifier will not
recognize “non PCM” audio. This includes proprietary compression
formats such as Dolby®, THX® and others. The device that is connected
to this amplifier must be set to PCM audio out only for optical audio.