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HD-PA35A

Congratulations on your selection of an RDL HD-Series High-Efficiency commercial audio amplifier. The HD-PA35A is part of the world’s highest performance full-featured high-efficiency mixer

amplifier series for commercial installations. This product includes remote level control capability and integral analog compression coupled to a sonically pleasing analog-filtered high efficiency

Zone 1 Class D output stage. The HD-Series 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.

HD-PA35A 25/70/100 V

OUTPUT CONNECTIONS MUST BE MADE BY

PERSONS ADVISED OR SUPERVISED TO

AVOID DANGERS AND PREVENT RISKS

WHICH ELECTRICITY MAY CREATE.

USE ONLY THE TERMINAL BLOCK

SUPPLIED WITH THE MODULE.

USE ONLY THE POWER SUPPLY

SUPPLIED WITH THE MODULE.

INSTALLATION AND OPERATION

INTRODUCTION

INPUT

CONNECTIONS

REMOTE CONTROL OF AMPLIFIER OUTPUT

Connections are made on the rear panel. All connections are on detachable terminal blocks or connectors. The tone controls, indicators and power button are on the front panel.

The input is available through either the balanced terminal block or through the unbalanced RCA jacks. The balanced and unbalanced inputs are bridging. The balanced and unbalanced inputs are both

active at all times. A signal is normally connected to either the balanced or unbalanced input, not to both inputs simultaneously. If this amplifier is fed from the line output of an RDL HD-Series mixer

amplifier, it presents a high impedance load to the mixer amplifier output. Up to five HD-Series amplifiers may be connected to the line output of an HD-Series mixer amplifier, provided the amplifiers

are located together and operate from the same power mains. RDL modules are available to distribute and/or isolate signals in larger systems.

INPUT (unbalanced)

Connect a mono or stereo standard unbalanced -10 dBV

audio source to the INPUT. The two input jacks provide

active summing of the left and right channels, thereby

preserving the stereo separation of the audio source.

INPUT (balanced or unbalanced)

Connect a balanced line-level source to the terminal block.

An unbalanced source may be connected provided the “-”

and “ground” terminals are connected together.

MONO SOURCE

LEFT

STEREO SOURCE

RIGHT

VCA REMOTE CTRL

Connect the VCA terminals directly to an RDL remote control. (Examples providing a single volume control location: D SERIES-RLC10K or D SERIES-RLC10KM with pushbutton muting) Other RDL remote controls

are available to provide multiple control locations. Visit rdlnet.com for details. The VCA may be controlled by an external 10 kOhm linear pot or from other equipment control outputs that provide 0 to 10Vdc.

CCW

External 10k Pot

(Linear Taper)

0 to 10 V

Ground Reference

External Control

0 to 10 V

Wiring may be unshielded or single-pair shielded (connect the shield between the ground terminals). Shielded wiring is recommended for installations in

environments where radio frequency emissions may be present.

Balanced LINE source connected using a

single-pair shielded audio cable

Unplug the power supply and remove the output terminal security cover. Connect constant voltage speakers to a single output voltage tap. Do not connect speakers with dissimilar voltages to multiple

output taps. Total connected load must not exceed 35 W. Upon completion of the output terminal block wiring, re-install the cover over the terminal block prior to plugging in the power supply.

Multiple 25 V speakers Multiple 70 V speakers Multiple 100 V speakers

891-3415A

SIGNAL PRESENT

The green LED glows when audio is present at the input. The indication is not affected by the setting of the mixer level control.

INPUT LEVEL

Adjust level control for the desired output level with the remote control (if used) set to normal operating position.

POWER INDICATOR

Glows dimly when unit is in standby (off)

mode; glows bright when amplifier is on.

POWER BUTTON

Latching pushbutton switches the

amplifier ON or off (STANDBY).

TONE CONTROLS

Adjust BASS and TREBLE as desired.

COMPRESSION INDICATOR

LED flashes when audio compressor is

acting on the amplified audio.

RDL• 659 6th Street • Prescott, AZ • USA 86301 • Sales: 800-281-2683 • 928-443-9391 • Tech Support: 800-933-1780 • 928-778-3554 • RDL Europe Sales & Support: (31) 20-6238-983 • www.rdlnet.com

Copyright © 2011 Radio Design Labs, Inc. RDL, Radio Design Labs and the RDL logo are registered trademarks of Radio Design Labs, Inc. Data reflects product at publication time, subject to change without notice. “Made in USA” applies to all HD products except power supplies. Other trademarks, if any, are the property of their respective owners.

OPERATION

OUTPUT CONNECTIONS