RDL HD-MA35U Installation And Operation

INTRODUCTION
Congratulations on your selection of an RDL HD-Series Ultra-High-Efficiency commercial mixer amplifier. The HD-MA35U is part of the world's first full-featured environmentally conscious
"green" mixer amplifier series for commercial installations. This product includes studio quality microphone input stages, line-level transformer isolation, equalization, remote control capability
and integral analog compression coupled to sonically pleasing analog-filtered high efficiency Class D output stages. An internal low-power-consumption processor monitors usage demands
to completely shut down internal circuitry for maximum power conservation and extremely low long-term operating cost. The HD-Series mixer amplifiers are designed and manufactured in the
U.S.A. using the most advanced automated manufacturing and testing processes for years of reliable high performance and cost savings.
CONNECTIONS
HD-MA35U 4Ω
Connections are made on the rear panel. All connections are on detachable terminal blocks or connectors. The Zone 2 mixer, Inputs 1 and 2 gain trimmers and VU-meter, ducking controls and
assignments, phantom voltage selectors and sleep mode delay timer settings are also provided on the rear panel. The Zone 1 mixer, tone controls, indicators and power button are on the front panel.
INPUT WIRING
Balanced MIC or LINE source connected
using a single-pair shielded audio cable
Four inputs may be connected. Each input is available on the primary Zone 1 front-panel mixer and on the Zone 2 rear-panel mixer. If used, the paging source is usually connected to Input 1.
INPUT 1
INPUT 1 BYPASS MASTER VCA
If the INPUT 1 (paging) level is to be controlled by a master VCA remote control, set the switch OFF (down). If a remote control
is not intended to adjust INPUT 1, set the switch ON (up). In BYPASS, pages are heard even if the master is off.
INPUT 1
Connect a MIC or LINE source. This is normally a paging mic or the line-level paging output from a phone PBX. The line-level
input is transformer balanced (providing galvanic isolation) and may be connected balanced or unbalanced.
The front-end preamplifier stages for Inputs 1 and 2 are each equipped with a gain trimmer. The dual-LED VU meter displays the signal level for Inputs 1 and 2 following the preamplifiers. This
allows each input gain trimmer to be set properly for the optimum signal-to-noise ratio, avoiding the possibility of input clipping common to mixers with unmetered input stages.
PRIORITY PAGING
INPUT DUCKING SELECTOR
Select any or all inputs (2, 3 and/or 4) to be ducked when a paging priority is detected (VOX activated by audio signal on INPUT 1, or
MANUAL activation by an external switch. Selected inputs are ducked only in Zone 1 (the primary amplified output). Set the switch
ON (switch up) to duck the input in Zone 1; set the switch OFF to prevent ducking. Inputs are not ducked in Zone 2.
VOX (VOICE-ACTIVATED PRIORITY)
If a paging signal is to automatically "duck" (fade down) other
audio inputs, feed a normal paging signal into INPUT 1 and adjust
the SENSITIVITY trimmer until the LED flashes regularly. Set the
SENSITIVITY trimmer fully CCW to disable the VOX function.
FADE-UP DELAY
Adjust the FADE-UP DELAY trimmer to delay the start of the
audio fade-up following the release of an external manual priority
switch and/or VOX priority detection.
MANUAL PRIORITY
If a swich (such as a paging mic push-to-talk switch) should "duck" (fade down) other audio inputs, connect the switch to the DUCK and Ground terminals.
/
8Ω
Balanced LINE signal from phone
PBX or audio transformer
PHANTOM VOLTAGE
If a condenser mic may be connected to INPUT 1, set the
phantom voltage ON (switch up).
GAIN TRIM
Feed a normal signal level into INPUT 1 and adjust the GAIN
TRIM for maximum brightness of the NORM green LED with
occasional flashing of the red PEAK LED. (Disconnect INPUT 2
during this adjustment.)
MIC or LINE Gain
Set the Input Gain to MIC or LINE/TEL according to the input
signal connected.

INSTALLATION AND OPERATION

Unbalanced MIC or LINE source connected using
a single-conductor shielded audio cable
INPUT 2
PHANTOM VOLTAGE
If a condenser mic may be connected
to INPUT 2, set the phantom voltage
ON (switch up).
GAIN TRIM
Feed a normal signal level into
INPUT 2 and adjust the GAIN TRIM
for maximum brightness of the NORM
green LED with occasional flashing
of the red PEAK LED. (Disconnect
INPUT 1 during this adjustment.)
MIC or LINE Gain
Set the Input Gain to MIC or LINE
according to the input signal connected.
INPUT 2
Connect a MIC or LINE source. The line-level input is
active balanced and may be connected balanced or
unbalanced.
INPUTS 3 & 4
LEFT
STEREO SOURCE
RIGHT
INPUTS 3 & 4
Connect a mono or stereo standard unbalanced -10 dBV audio
source to INPUTs 3 and/or 4. The two input jacks associated with
each input provide active summing of the left and right channels,
thereby preserving the stereo separation of the audio source.
HD-MA35U
MONO SOURCE