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6. SPECIFICATIONS

AUDIO INPUTS & PRE AMPS

Connectors XLR
Type

balanced

Impedance 2k 

Ohms 

Min Sensitivity

-40dB

Peak input level

+5dB

Gain control range

50dB

Peak amplification

74dB

Phantom power

+48V, switchable

AUDIO OUTPUTS

Connectors 1/4" 

jack

Type TRS 

balanced

Impedance -10dB 

47K

Peak output level 

+18.5dB

DIST, FREQ, S/N RATIO & CROSSTALK

Frequency response 

20Hz~20kHz, 0dB~-2B

Distortion

0.02%

S/N Ratio

better than 80dB

Crosstalk rejection

>70dB@1kHz;-20dBinput

POWER SUPPLY

Mains voltages

USA/Canada ~ 120 V AC, 60 Hz
U.K./Australia ~ 240 V AC, 50 Hz
Europe ~ 230 V AC, 50 Hz
General export model ~ 100-120 V AC, ~ 200-240 V AC, 50-60 Hz

Power consumption 

8.5VA

Fuse 

100-120 V AC: 630 mA (slow-blow)
200-240 V AC: 315 mA (slow-blow)

Mains connection 

External power supply connector

PHYSICAL

Dimension 

1 3/4" (44.5 mm) * 19" (482.6 mm) * 8 1/2" (217 mm)

Net weight 

approx. 3.4 kg

SM Pro Audio is constantly striving to maintain the highest professional standards. As a result of 
these efforts, modifications may be made from time to time to existing products without prior 
notice. Specifications and appearance may differ from those listed or shown.

Summary of Contents for SM PR4

Page 1: ...SM Pro Audio SM Pro Audio VALUE SERIES Operating Manual SM PR4 V Version 1 0 November 2002 ...

Page 2: ...ke sure your appliance is set to the correct voltage for the country in which it will be used Grounding and Polarization Precautions should be taken so that the grounding or polarization means of an appliance is not defeated Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on pinched dam aged worn or rubbed by any other device or obstacle Cleaning ...

Page 3: ...stomer Thank you very much for expressing your confidence in SM Pro Audio products by purchasing this unit The SM PR4 has been designed to be used as a standard tool for home pro studios With much experience in the audio industry over a long period of time and along with valuable suggestions from our customers our engineers have developed a product we know you will be satisfied with We guarantee y...

Page 4: ...ents and design 2 2 Inputs and outputs 3 INSTALLATION 3 1 Rack mounting 3 2 Mains voltage 3 3 Audio connections 4 FRONT PANEL CONTROLS 4 1 Independent 4 x rotary pre amplifier gain controls 4 2 phantom power switches 5 APPLICATION 5 1 Using the SM PR4 6 SPECIFICATIONS 7 WARRANTY ...

Page 5: ... channels of balanced input with a full range of gain control from 20dB to 40dB and Phantom power for every channel This half rack unit can now solve many of the connectivity issues which are raised in a large range of situations whether in the Studio home club installation or other live sound applications 2 THE DESIGN CONCEPT 2 1 High quality components and design The philosophy behind SM Pro Aud...

Page 6: ...st be made by the consignee 3 1 Rack Mounting The SM Pro Audio SM PR4 fits into one half standard 19 rack unit of space 1 3 4 Be sure that there is enough air space around the unit for cooling As to avoid overheating please do not place the SM PR4 on high temperature devices such as power amplifiers 3 2 Mains voltage The SM PR4 has a professional external 16v AC power supply Before you connect you...

Page 7: ...ts per channel 4 1 The front panel rotary gain controls Each channel features a rotary gain control for variable adjustment of the desired pre amplifier level 4 2 The Back panel phantom power switches Each channel features a phantom power supply for enabling the supply of 48v through the XLR input connector to power condenser microphones Each Switch controls 2 channlels ...

Page 8: ...nation Mixer recorder etc 3 Adjust the variable gain control to the desired pre amplified level To ensure sure you do not over pre amplify your signal a peak clip indicator light has been provided on the front panel of the SM PR4 for each channel When illuminated this light indicates that the pre amplifier is overloaded and that distortion will occur Please turn down the variable gain control for ...

Page 9: ...ut POWER SUPPLY Mains voltages USA Canada 120 V AC 60 Hz U K Australia 240 V AC 50 Hz Europe 230 V AC 50 Hz General export model 100 120 V AC 200 240 V AC 50 60 Hz Power consumption 8 5VA Fuse 100 120 V AC 630 mA slow blow 200 240 V AC 315 mA slow blow Mains connection External power supply connector PHYSICAL Dimension 1 3 4 44 5 mm 19 482 6 mm 8 1 2 217 mm Net weight approx 3 4 kg SM Pro Audio is...

Page 10: ...nappropriate use SM Pro Audio shall at its sole discretion either repair or replace the product 2 If the warranty claim proves to be justified the product will be returned freight prepaid by SM Pro Audio within Australia Outside of Australia the product will be returned at the buyer s expense 3 Warranty claims other than those indicated above are expressly excluded 3 RETURN AUTHORIZATION NUMBER 1 ...

Page 11: ...om this warranty in particular if caused by inappropriate use Likewise the warranty does not cover defects of expendable parts caused by normal wear of the product Expendable parts are typically pots potentiometers switches and similar components 4 Damages defects caused by the following conditions are not covered by this warranty Misuse neglect or failure to operate the unit in compliance with th...

Page 12: ... the product 7 OTHER WARRANTY RIGHTS This warranty does not exclude or limit the buyer s statutory rights provided by national law in particular any such rights against the seller that arise from a legally effective purchase contract The information contained in this manual is subject to change without notice No part of this manual may be reproduced or transmitted in any form or by any means elect...

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