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IMPORTANT SAFETY INSTRUCTIONS

The amplifier has been designed to operate at the highest level of efficiency and performance 
in any normal operating situation; however, there are a few important use and care principles 
that must be kept in mind when operating the amplifier:

Read these instructions.

Keep these instructions.

Follow all instructions.

Do not expose the amplifier to rain, moisture, or excessively damp conditions.

Do not block any ventilation openings.

Due to auto-ranging circuitry and dual-stage voltage regulation, the audio 

performance will not be affected by any voltage fluctuations within the operating 

voltage range. The 

MODEL 825 STEREO AMPLIFIER

 can be operated at any mains voltage 

over the range of 85 to 265 VAC without any adjustments necessary. 

The 

MODEL 825 STEREO AMPLIFIER

 must not be modified in any way, other than according 

to official service bulletins from JRDG (Jeff Rowland Design Group). Otherwise, the 

factory warranty will be immediately voided.

When operating the 

MODEL 825 STEREO AMPLIFIER

, a properly grounded 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 and refer all service issues to qualified personnel. The 

voltages inside the 

MODEL 825 STEREO AMPLIFIER

 can be hazardous.

PROTECTIVE SYSTEMS

The 

MODEL 825 STEREO AMPLIFIER

 is equipped with internal fuses for protection against excessive 

AC current draw; however, since no protection circuitry or system can completely protect a 
product from every electrical hazard, certain precautions should be observed. In the event of 
severe voltage hazards such as lightning or when the amplifier will not be used for extended 
periods of time, the amplifier should be unplugged from the AC mains to avoid potential 
damage to the internal circuitry. All other audio/video system components should also be 
disconnected from AC mains power as hazardous voltages can easily travel throughout an 
interconnected system.

 

MODEL 825 STEREO AMPLIFIER

 

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

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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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