OSD PA90 - Commercial Amplifier Manual

Please take a few moments to read the entire manual, and be sure to retain this document for future reference. Please read and observe all safety instructions detailed on each page.

NOTE: If any part of this product is damaged or missing, please call OSD AUDIO Return Department at (888) 779-4968

Using the controls/Front Panel

Power

The POWER push button will manually switch the PA90 Commercial amplifier on or off.

Control Knobs

Input Adjustment

The OSD PA90 70V/100V Commercial Amplifier has 6 inputs: MIC 1, MIC 2, MIC 3, AUX 1, AUX 2 and AUX 3. Each of the inputs can be adjust the input gain using the corresponding control knob on the front panel.

Output Adjustments

The OSD PA90 Commercial Amplifier allows you to adjust the output volume, Treble and Bass by the corresponding control knob on the front panel. There is a LED Meter to indicate the output level located above the POWER pushbutton.

The OSD PA90 also has protect function. When it is short circuit, or over-heating, or overload, this function will be automatically switched on, then the product will mute and the RED PROTECT LED indicator will illuminate.

The OSD PA90 also has CHIME and ALARM functions. The ALARM has the top priority and CHIME is second over all the inputs. When pressing CHIME button, all inputs will be temporarily mute and the chime sound will come out. When pressing ALE button, you will start the alarm function, the alarm will keep on ringing and will not automatically stop until you press the ALE button again. All inputs will be mute including the CHIME tone when alarm function is on.

Using the controls/Back Panel

INPUTS

There is a total of 7 inputs on the rear panel of the PA90 Commercial Amplifier including 3 MIC inputs, 3 AUX inputs, and 1 TEL input with input gain adjustment.

The MIC inputs are using balanced XLR connectors. Each MIC input have a Line/Mic level DIP switch (Switch 1) and a 24V Phantom Power Supply On/Off DIP switch (Switch 2). If the Line/Mic DIP switch is switched down, the corresponding MIC input is set to accept Mic level signal input, if the Line/Mic DIP switch is switched up, the corresponding MIC input is set to accept Line level signal input. If the Phantom Power Supply DIP switch is switched down, it means the corresponding MIC input will provide a 24V phantom power to the microphone, if the Phantom Power Supply DIP Switch is switched up, the corresponding MIC input will not provide phantom power to microphone.

The AUX inputs are using RCA connectors. Each group of AUX input has "L" and "R" as left channel and right channel inputs respectively.

The TEL input is using 3 pin terminal block. It allows you to connect telephone signal as an input of PA 90. The TEL input gain can be adjusted by the screwdriver adjustment knob labeled as "Gain" beside the terminal block.

The PA90 commercial amplifier also support 2 x RCA Mono output function, it allows to chain one amplify to the next and share same source connect on PA90.

NOTE: The MIC 1 Input has priority over the other inputs. When the MIC 1 Input signal is present, the PA90 will automatically mute other inputs and only MIC 1 Input is available to output.

OUTPUTS

The OSD PA90 output module, including PTT Push To Talk, 24V DC back up power supply, ohm output, 0V output and 100V output, is using the screw terminal connectors.

If you will use 8 ohm output, connect the speaker's positive terminal to the amplifier's "8Ω" terminal and connect the speaker's negative terminal to the amplifier's "COM" terminal.

If you will use 70V output, connect the speaker's positive terminal to the amplifier's "70V" terminal and connect the speaker's negative terminal to the amplifier's "COM" terminal.

If you will use 100V output, connect the speaker's positive terminal to the amplifier's "100V" terminal and connect the speaker's negative terminal to the amplifier's "COM" terminal.

The PPT connectors allow you to connect the OSD PA90 to external devices to activate the "Push To Talk" function. When this function is switched on, all inputs will be mute and you can use MIC 1 to make broadcasting or announcement.

The 24V DC connectors allow you to connect external back up power supply to OSD PA90. It helps you th use OSD PA90 in applications that must continue to operate in case of a power failure or in mobile applications where 115V or 230V AC power is not available.

Note: This amplifier will supply 60W to the output. Please verify that your speakers are capable of handling such power to avoid possible damage!

Specifications

Power Bandwidth: 50Hz - 15kHz

3x XLR Microphone Inputs; Switchable 24Volt Phantom Power switch per each mic input

3x Source Inputs

60W into 8 ohm output mode with less than 1% THD+N
60W into 70V output mode with less than 1% THD+N
60W into 100V output mode with less than 1% THD+N

Frequency Response: 50Hz to 15kHz, (+0dB, -3.0dB)

Signal to Noise ratio:
Mic: better than 55 dB
Line: better than 60 dB
AUX: better than 70 dB
TEL: better than 70 dB

Input Sensitivity:
Mic: -50 dB
Line: -20 dB
AUX: -12 dB
TEL: -10 dB

Tone Adjustment:
Bass: ±10 dB
Treble: ±10 dB

Power Supply: Switchable AC 115V/230V, DC 24V

AC Mains Fuse: T1.5A/250V

Dimensions: 19.0"w x 13.3"d x 3.6"h, "2U Rack Space Style"

NOTE: This amplifier is capable of use with standard US voltage (115V) as well as European voltage (230V). The amplifier will be preset for the voltage of the country it is sold in. Use with other voltages requires some changes to be made to the amplifier. Should you wish to use the amplifier in a country other than the one for which it was purchased, please contact OSD AUDIO at (888) 779-4968

Use only with the cart, stand, tripod bracket, or table specified by the manufacturer, or sold with the apparatus. When moving the cart/apparatus combination avoid injury from tip-over.

LIMITED WARRANTY

OSD AUDIO warrants its amplifier products against defects in materials and workmanship for a limited period of time. For a period of two years from date of original purchase, we will repair or replace the product, at our option, without charge for parts and labor.

This limited warranty applies only to purchases from authorized OSD AUDIO retailers. This limited warranty is extended only to the original purchaser and is valid only to customers in USA.

Customers are required to provide a copy of the original sales invoice from an authorized OSD AUDIO dealer when making a claim against this limited warranty. This limited warranty only covers failures due to defects in materials or workmanship that occur during normal use. It does not cover failures resulting from accident, misuse, abuse, neglect, mishandling, misapplication, alteration, faulty installation, modification, service by anyone other than OSD AUDIO or damage that is attributable to acts of god. It does not cover costs or transportation to OSD AUDIO or damage in transit. The customer should return their defective product, freight prepaid and insured, to OSD AUDIO, only after receiving a Returned Merchandise Authorization (RMA) number.

This warranty will become void if the serial number identification has been wholly or partially removed, altered or erased. Repair of replacement under the terms of this warranty does not extend the terms of this warranty. Should a product prove to be defective in workmanship or material, the customer's sole remedies will be repair or replacement as provided under the terms of this warranty. Under no circumstances shall OSD AUDIO be liable for loss or damage, direct, consequential or incidental, arising out of the use of or inability to use the product.

If you have any questions regarding how to set this up, please call OSD AUDIO support a (888) 779-4968

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download OSD PA90 - Commercial Amplifier Manual