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PAM245
COMMERCIAL
MULTI-ZONE
AMPLIFIER
INSTRUCTION MANUAL
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PRECAUTIONS
1.Unpacking
READ THIS FIRST
After removing the amplier from the carton, inspect for any
exterior damage to the unit. If damage is noted, notify the carrier
at once so that a claim can be justied. Save all packing material.
This is important when the claim is processed.
2.Ventilation
To oset heat generated by the unit, it is necessary to provide
ample ventilation around the unit. Avoid blocking or impeding the
ventilation holes on the unit. To prevent unnecessary problems,
install the unit in a place free from any vibrations, direct sunlight,
humidity or dust circulation.
3.Prevent liquids or other materials to enter cabinet
If the unit gets wet or any foreign material enters the amplier
cabinet, immediately disconnect the AC power cord and consult
your dealer or qualied technician.
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IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions completely.
2. Keep these instructions for future reference.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block ventilation openings. Install in accordance with instructions.
8. Do not install on or near any heat sources such as radiators, heat registers,
stoves or other apparatus (including ampliers) that produce heat.
9. Do not defeat purpose of the polarized or grounding-type plug. A polarized plug
has two blades with one wider that the other. A grounding type plug has two
blades and a third grounding prong. The wide blade and the third prong are
provided for your safety. If the provided plug does not t into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles and where connected to the apparatus.
11. Only use the attachments/accessories specied by the manufacturer.
12. Use only with the cart, stand, tripod, bracket or table specied by the
manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has
been damaged in any way such as power supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
15. Apparatus shall not be exposed to dripping or splashing and no objects lled with liquids,
such as vases, shall be placed on the apparatus.
WARNING – To reduce the risk of re or electric shock, do not expose this apparatus to rain
16.
or moisture.
CAUTION – Use of any controls or adjustments or performance of procedures
17.
other than those specied herein may result in hazardous radiation exposure.
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THANK YOU!
We at OSD Audio thank you for your purchase of our PAM245 amplier. The PAM245 is an energy
ecient Class D amplier line.
We have taken our customers’ input and created the perfect amplier for almost any application. In
addition to the great features you’ve come to expect in a OSD Audio amplier, the PA series has ample
inputs, an included IR-remote control, an RS232 input for integration with control systems, front panel
locking capability, and includes all rack-mounting hardware.
With a stylish appearance and all these additional features at a price similar to previous generation
ampliers, the PA series is sure to become your go-to amplier.
Please review this checklist of components to make sure you received all items with your amplier:
Inside the box (PAM245)
• One amplier
• One product manual
• One IR remote control (Battery included)
• One set of rack mounting hardware including two (2) brackets
• AC Power Cord
Please make sure you have all accessories and your box and unit did not suer any noticeable damage
during transit prior to connecting your amplier.
TABLE OF CONTENTS
Page 2 Safety Instructions
Page 4 Features and Specications
Page 4 Front Panel
Page 6 Rear Panel
Page 9 Reference Information
Page 10 IR Remote
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987654
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SECTION 1: FEATURES AND SPECIFICATIONS
• 240W RMS/480W Max Power
• AC 100-240V, 50/60Hz
• 3 XLR Microphone inputs with selectable phantom power (Mic 1 has selectable priority)
• Telephone paging input
• Music on hold output
• 5 zoned speaker outputs (70V)
• Non-zoned 4/8 Ohm output
• RCA or XLR line output
• Front Bass and Treble controls
• Individual volume control for each input
• Master digital volume control
• Digital front panel lock
• RS232 input for integration with popular control systems
SECTION 2: CONTROLS AND CONNECTIONS
FRONT PANEL
1) Zone Selector:
a. Turn specic speaker runs on or o, either via buttons on front panel or
through IR remote control.
b. If a zone is turned on, the LED above the zone button will illuminate.
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SECTION 2: CONTROLS AND CONNECTIONS
2) Volume Level Indicator:
a. This display will indicate the level of volume of the amplier.
b. Volume can be changed either using the Master Volume Knob (#9) or by using the IR
remote control
3) IR receiver:
a. Aim your IR remote control at this window to control the amplier.
b. Range of the IR remote can be extended by using an optional IR repeater.
4) Microphone Volume Control Knobs:
a. Turn the knob left to decrease the microphone volume relative to other inputs.
b. Turn the knob right to increase the microphone volume relative to other inputs.
5) Auxiliary Input Volume Control Knobs:
a. Turn the knob left to decrease the AUX input volume relative to other inputs.
b. Turn the knob right to increase the AUX input volume relative to other inputs.
6) Tone Controls:
a. Turning the Bass knob left or right will increase or decrease the bass of all inputs.
b. Turning the Treble knob left or right will increase or decrease the treble of all inputs.
7) Master Volume Knob:
a. Turn the knob to the left to decrease the volume of all inputs and sources.
b. Turn the knob to the right to increase the volume of all inputs and sources.
8) System Lock Indicator:
a. This amplier comes complete with a feature that will lock the functions of the front panel
so that only the IR remote can control the amplier.
b. This is useful for when the amplier is installed in a public area and unauthorized
personnel or customers might have access to the volume, source, etc.
9) Standby Power Button:
a. This button will enable the amplier to enter and exit standby mode.
b. When in standby mode, the LED light above the button will illuminate.
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12 13 14 15 16 17 18
28
27
26
2524
2322
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REAR PANEL
SECTION 2: CONTROLS AND CONNECTIONS
12) Main Power Switch:
a. This switch will completely turn the amplier power on and o.
13) Commercial Speaker Zone Outputs:
a. This amplier comes complete with both constant voltage and constant impedance
outputs. Only one type of output may be used at a time. Attempting to use both
simultaneously could damage the amplier and/or speakers and would void the warranty.
b. 5 outputs are provided to make speaker wiring easier and to allow for distribution of
speakers into groups.
c. In conjunction with the buttons on the front panel (#2), audio can be turned on and o to
these zones.
VERY IMPORTANT: Make sure commercial audio principles are followed and the proper
speaker types are wired to the proper outputs. Putting the incorrect
speakers on the incorrect output can damage your speakers
and/or amplier and is not covered under warranty.
If unsure, please contact a professional.
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SECTION 2: CONTROLS AND CONNECTIONS
14) RS232 Connector:
a. This connection allows the amplier to be controlled by a remote source, such as a third
party automation system.
b. Programming instructions are available upon request. Please contact the OSD Audio
Technologies Technical Support department.
PLEASE NOTE: For Music-on-hold and Telephone Paging, please refer to the instructions of your
PBX or telephone paging system for proper function. These are simply passive inputs that allow
for either music to be fed into the phone system for audio while callers are on hold, or for using
the features of the phone system to send a page via a specic output on the phone system.
Installation instructions vary widely by manufacturer. If unsure, please contact a professional.
15) Music-on-hold (MOH) Volume Knob:
a. This knob will allow you to adjust the volume of the MOH output.
16) Music-on-hold (MOH) Output:
a. These terminals allow output of the amplier’s audio to another source,
such as a telephone paging system.
i. 600 Ohms/1V
ii. 8 Ohms/1W
17) Telephone Paging Inputs:
a. These inputs will allow you to utilize your amplier with a telephone paging system for
purposes of paging.
18) Telephone Paging Volume Knob:
a. If connected to a phone system, this will allow adjustment of the incoming audio.
19) AC Power Inlet:
a. Connect your included power cord here, carefully following all safety instructions.
20) External Fuse:
a. T6.3AL, 250V fuse can be replaced here.
21) Zone Output Switch:
a. Change the format of the outputs between the 4 Ohms/8 Ohms single output and the 70V
zoned outputs.
VERY IMPORTANT: NEVER switch output while amplier is active.
NEVER switch output and power amplier if incorrect speakers are
connected to the output.
Damage can occur to the amplier and/or speakers and the warranty
will be void. If unsure, please consult a professional.
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SECTION 2: CONTROLS AND CONNECTIONS
22) Single-Zone Constant Impedance Outputs
a. This amplier comes complete with both constant voltage and constant impedance outputs.
Only one type of output may be used at a time. Attempting to use both simultaneously
could damage the amplier and/or speakers and would void the warranty.
b. This amplier oers single-channel 4 Ohms and 8 Ohms outputs.
23) XLR Line Output:
a. Utilize this XLR output to connect the amplier to a booster amplier with a matching input.
24) RCA Line Output:
a. Utilize this RCA output to connect the amplier to another amplier with RCA inputs to daisy
chain ampliers.
25) Auxiliary Inputs:
a. These inputs accept right and left channel RCA inputs.
26) Phantom Power Switch:
a. This amplier provides phantom power to the appropriate microphones.
b. This switch will turn the phantom power feature on and o for each microphone input.
27) Microphone Inputs:
a. This amplier has three XLR microphone inputs.
b. To expand the number of microphone inputs on this amp, we suggest using an external mi
crophone mixer.
28) Priority Paging Switch
a. Activation of this switch will allow any microphone connected to MIC1 to take priority.
b. This means that when a page is made from a microphone connected to this input, all
other audio sources will be temporarily muted.
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SECTION 3: REFERENCE INFORMATION
The following information is provided for reference only. Please consult a professional if unsure
about any aspects of commercial or residential installations.
SPEAKER CONNECTION
The rear panel of the amplier contains 5, zoned speaker connections.
BE SURE TO CONNECT SPEAKERS PROPERLY, see line voltage instructions below.
The speaker lines are to be connected directly between the appropriate COM terminal on the terminal
strip and the terminal corresponding to the impedance of the speaker(s).
Connect the cables to the terminals on the screw terminal strip provided. Use the screw terminals which
correspond to the proper polarity of the speaker(s). One lead must always be connected to the COM.
IMPORTANT NOTICE: When 70V constant line voltages are used, a line matching transformer must be
used with each speaker. All transformers must be connected in parallel.
ALWAYS CONNECT LINE TRANSFORMERS IN PARALLEL, NEVER CONNECT IN SERIES
SPEAKER IMPEDANCES
Speaker terminal taps for 70V constant line voltage are provided on the rear panel of the unit. To connect
the power output directly to a speaker or PA horn or a combination of speakers and/or PA horns, connect to the COM and (+) terminal on the strip. Be sure the speaker(s) or PA horn(s) can handle a reasonable power output from the amplier or permanent damage to the speaker(s) or PA horn(s) may result.
Also, be careful not to overload the amplier with too many speakers or PA horns. If it is desired to use
a number and variety of speakers, the speakers must be arranged in various series or parallel arrays to
provide proper impedance matching. 70V constant line voltage must be used (parallel connection only).
If you are not familiar with impedance matching, consult a professional installer or technician for advice.
If 70V constant line voltages are used, a line matching transformer must be used with each speaker.
Again do not overload or use incompatible speakers. Line transformers are the preferred method for
multi-speaker installation.
CABLE REQUIREMENTS
Output cabling need not be shield in most case and should be of sucient gauge to minimize losses due
to the
resistance of the wire over long runs (insertion loss). Cable thinner than 18 gauge AWG is not recommended. Long runs require 16 gauge AWG or heavier.
In some cases where the output cable is run in close proximity to unshielded intercom cables, electrical
cables, radio transmission antennas or other sources of interference, or when the amplier is being used
for paging from a telephone system, the amplier may require shielded output cabling to prevent audio
feedback or interference.
PRIORITY PAGE
The amplier features a voice activated priority page circuit and automatically mutes all program material
(Auxiliary, Module, Microphone, etc.) from the amplier’s output, and permits MIC 1 and the TEL input to
override for paging announcements.
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SECTION 3: REFERENCE INFORMATION
TELEPHONE LINE
A telephone line input of 600 Ohms is provided. For phone systems with this feature, a Music on Hold
output is also available.
WHENEVER IN DOUBT ABOUT INSTALLATION, CONSULT WITH A PROFESSIONAL INSTALLER
OR TECHNICIAN. OTHERWISE, PERSONAL INJURY, DAMAGE TO THIS AMPLIFIER AND/OR
SPEAKERS MAY RESULT AND YOUR WARRANTY MAY BE VOID.
SECTION 6: IR REMOTE CONTROL
There is an IR Remote control included with every PA series amplier.
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WARRANTY & REPAIR
OSD AUDIO electronics have (2) year Limited Warranty against defects in materials and workmanship. Proof of purchase must accompany all claims. During the warranty period OSD
AUDIO will replace any defective part and correct any defect in workmanship without charge
for either parts or labor.
OSD AUDIO may replace returned electronics with a product of equal value and
performance. In such cases, some modications to the mounting may be necessary and are
not OSD AUDIO’s responsibility.
For this warranty to apply, the unit must be installed and used according to its written instructions. If necessary, repairs must be performed by OSD AUDIO. The unit must be
returned to OSD AUDIO at the owner’s expense and with prior written permission.
Accidental damage and shipping damage are not considered defects, nor is damaged resulting from abuse or from servicing performed by an agency or person not specically authorized
in writing by OSD Audio.
OSD AUDIO sells products only through authorized dealers and distributors to ensure that
customers obtain proper support and service. Any OSD AUDIO product purchased from an
unauthorized dealer or other source, including retailers, mail order dealers and online sellers
will not be honored or serviced under existing OSD AUDIO warranty policy. Any sale of product by an unauthorized source or other manner not authorized by OSD AUDIO shall void the
warranty on the applicable product.
Damage to or destruction of components due to application of excessive power voids the
warranty on those parts. In these cases, repairs will be made on the basis of the retail
value of the parts and labor. To return for repairs, you must email customer service at
RMA@OSDAUDIO.com for a Returned.
Merchandise Authorization (RMA) number then the unit must be shipped to OSD AUDIO at
the owner’s expense, along with a note explaining the nature of service required. Be sure to
pack the product(s) in a corrugated container with at least 3 inches of resilient material to protect the unit from damage in transit.
This Warranty Does Not Cover: Damage caused by abuse, accident, misuse, negligence, or
improper operation (installation) • Any products that have been altered or modied •
Any product whose identifying number of decal, serial #, etc. has been altered,
defaced or removed • Normal wear and maintenance.
www.osdaudio.com | 775 Columbia Street Brea, CA. 92821
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