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MODEL 825 STEREO AMPLIFIER

Operational Manual

© Jeff Rowland Design Group 2013

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All Rights Reserved

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Summary of Contents for 825

Page 1: ...MODEL 825 STEREO AMPLIFIER Operational Manual Jeff Rowland Design Group 2013 All Rights Reserved ...

Page 2: ...ded AC receptacle should be used A potential shock hazard may result if the supplied 3 wire grounded AC cable ground terminal is defeated or lifted or the unit is connected to a 2 wire ungrounded AC outlet The MODEL 825 STEREO AMPLIFIER is designed to perform optimally with no adjustments or maintenance for the lifetime of the product Do not attempt to open the bottom or top cover of the amplifier...

Page 3: ...sferable to any secondary or other purchaser In order to have this product repaired or replaced the original purchaser must first obtain the prior authorization of Jeﬀ Rowland Design Group Inc or one of its dealers Purchaser must then return the product PACKAGED IN ITS ORIGINAL CARTON FREIGHT PREPAID to Jeﬀ Rowland Design Group Inc 2911 North Prospect Street Colorado Springs Colorado 80907 or to o...

Page 4: ...owland Design Group Inc within thirty 30 days of the date of purchase If this product is used in a commercial or industrial application then special warranty exclusions may apply Contact your dealer or Jeﬀ Rowland Design Group Inc for information regarding our commercial warranty policies GUIDE USE This guide is designed to make installing and using this product as easy as possible Information in ...

Page 5: ...maximum performance and ease of use for which this amplifier was designed Please note that your MODEL 825 STEREO AMPLIFIER serial number begins with the letters SC Please include this number with any correspondence regarding your MODEL 825 STEREO AMPLIFIER It has been my joy to create an audio component of enduring value that reflects the highest ideals of musical and artistic expression It is my ...

Page 6: ...ABLE OF CONTENTS Special Design Features 6 Maintenance and Care 8 Unpacking and Placement 9 Front Panel 10 Rear Panel Connections 11 Amplifier Setup 12 Specifications 14 MODEL 825 STEREO AMPLIFIER PAGE 5 ...

Page 7: ...l conditions HIGH PRECISION SURFACE MOUNT COMPONENTS Extensive use of Lead Pb free low temperature coeﬃcient active and passive surface mount components results in significantly smaller loop areas reduced circuit capacitance and inductance and introduces less noise than conventional leaded components TRANSFORMER COUPLING AND ISOLATION Transformer coupled input circuitry provides universal componen...

Page 8: ...button switches the amplifier into standby mode 1 watt consumption REMOTE ON OFF A 1 8 3 5mm mini plug connector on rear panel permits amplifier power on standby switching in remote and home theater applications SELF LEVELING SUPPORTS Removable 3 point self leveling Delron chassis supports provide high frequency mechanical noise isolation MODEL 825 STEREO AMPLIFIER PAGE 7 ...

Page 9: ...EFORE ATTEMPTING TO CLEAN IT THIS WILL PREVENT SMALL SCRATCHES FROM MARRING THE SURFACE BEFORE THE SURFACE COATING HAS HAD A CHANCE TO HARDEN COMPLETELY WARNING THE FRONT PANEL OF THE UNIT SHOULD NEVER BE CLEANED WITH ANYTHING OTHER THAN A VERY SOFT COTTON CLOTH AND PLAIN WATER OR FINE OIL BASED FURNITURE POLISH BECAUSE OF THE FINE FINISH OF THE FRONT PANEL USE OF ANY OTHER CLEANING AGENT MAY PERM...

Page 10: ...ave all of the packing materials If the amplifier is returned to your dealer or Jeﬀ Rowland Design Group the original packing materials must be used for shipment to avoid possible damage Neither Jeﬀ Rowland Design Group nor the shipper can be held responsible for damages incurred during transit if the original factory packing is not used All factory returns require that Jeﬀ Rowland Design Group is...

Page 11: ...NT PANEL POWER BUTTON Press this button to operate the amplifier Press again to place the amplifier in Standby mode 2 POWER INDICATOR RING This white ring will illuminate when the amplifier is operational MODEL 825 STEREO AMPLIFIER PAGE 10 ...

Page 12: ... 6 PHASE Use phase adjustment switch to accommodate system phase standards Use PIN 2 if the system phase is unknown Can be used to change absolute phase as desired Ensure that left and right channels are matched or bass response and imaging may suﬀer WARNING ALWAYS POWER OFF UNIT BEFORE SWITCHING PHASE 7 LOUDSPEAKER OUTPUTS Unscrew the knob that secures the speaker output connectors on both the SP...

Page 13: ... HANDLES Use to move and position amplifier and power supply 15 DC POWER CABLE Connect to DC POWER 9 16 DC POWER CABLE Connect to DC POWER OUTPUT 10 17 AUX PS INPUT CABLE Connect to AUX PS INPUTS 8 and 9 18 DELRON ISOLATION SPHERES Set each sphere in one of four circular indentions in top cover of power supply Align isolation spheres with circular indentions in bottom cover of amplifier AMPLIFIER ...

Page 14: ...click will be felt and heard when the cable is correctly inserted NOTE DO NOT FORCE CABLE INTO RECEPTACLE UNLESS ALIGNMENT IS ACHIEVED 3 Insert AUX PS INPUT CABLE 17 into AUX PS INPUT 8 and insert AUX PS INPUT CABLE 17 into AUX PS OUPUT 11 A click will be felt and heard when the cable is correctly inserted 4 Insert 20 amp Power cord into AC MAINS INPUT 12 receptacle and into wall 5 Press FRONT PAN...

Page 15: ...r 1000 20 Hz 20 kHz Overall Gain Bal or Unbal Switchable 26 32 dB Common Mode Rejection Ratio Absolute Phase Non inverting Inputs 1 pair balanced XLR 1 pair unbalanced RCA Outputs 2 pair parallel binding posts Power Consumption Idle Power Consumption Standby Amplifier Weight 160 4 lbs 73 kg Amplifier Dimensions h w d 16 5 x 15 5 x 16 25 419mm x 394mm x 413mm MODEL 825 STEREO AMPLIFIER PAGE 14 ...

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