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MAINTENANCE AND CARE

All Jeff Rowland Design Group products are designed to provide a lifetime of enjoyment and 
listening pleasure.

Chassis is sealed to prevent dust from entering the interior of the chassis and thus should 
never need interior cleaning during the lifetime of the product. All internal circuitry is 
maintenance-free such that no adjustments of any kind are necessary over the lifetime of the 
product. If the amplifier is ever in need of service, updating, or upgrading, it should only be 
returned to an authorized repair facility or technician for servicing.

The front panel of the unit is precision-machined in a unique process that incorporates a 
diamond tipped cutting tool. This process was refined over many years to produce an 
attractive and unique appearance. Because the surface is not finished in the typical fashion of 
most audio and video equipment, there are a few rules that must be kept in mind when 
cleaning the equipment.

NOTE: PLEASE ALLOW THE FRONT PANEL, WHICH IS COATED WITH AN AUTOMOTIVE-GRADE POLYURETHANE 
FINISH, TO CURE FOR 6 MONTHS BEFORE 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 PERMANENTLY SCRATCH THE 
FINISH.

The top and bottom cover, sides and bottom are protected by a durable black anodized finish 
and can be cleaned with a soft cotton cloth (such as an optical lens or microfiber cleaning 
cloth) dampened with plain water. Water should be applied directly to the cloth and not the 
chassis. A very mild plastic or glass cleaner that does not contain ammonia may also be used. If 
a mark has been left on the chassis, do not use any type of abrasive or chemical cleaner to 
remove the mark.

If you have any questions about the care or cleaning of your 

MODEL 625 STEREO AMPLIFIER

please contact your dealer before attempting to clean the chassis. The use of a cleanser or 
abrasive to clean the chassis that has not been approved by the factory will almost certainly 
damage the finish and will not be covered under warranty.

 

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Страница 1: ...MODEL 625 STEREO AMPLIFIER Operational Manual REVB1 Jeff Rowland Design Group 2011 All Rights Reserved...

Страница 2: ...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...

Страница 3: ...is non transferable 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...

Страница 4: ...rized to do so Warranty registration cards must be completed and mailed to Jeff Rowland Design Group Inc within thirty 30 days of the date of purchase If this product is used in a commercial or indust...

Страница 5: ...u to gain the maximum performance and ease of use for which this amplifier was designed Please note that your MODEL 625 STEREO AMPLIFIER serial number begins with the letters SB Please include this nu...

Страница 6: ...TABLE OF CONTENTS Special Design Features 6 Maintenance and Care 8 Unpacking and Placement 9 Initial Inspection 9 Unpacking 9 Front Panel 10 Rear Panel 11 Specifications 12 PAGE 5...

Страница 7: ...ty 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 cir...

Страница 8: ...panel push 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 ho...

Страница 9: ...6 MONTHS BEFORE 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...

Страница 10: ...r immediately We strongly suggest that you save 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 sh...

Страница 11: ...t Panel 1 FRONT 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 amplifi...

Страница 12: ...e usually red loudspeaker cable spade terminal to the positive binding post and the negative usually black spade terminal to the negative binding post of either horizontally or vertically oriented LEF...

Страница 13: ...ms THD Noise 0 005 1 kHz 8 ohms Damping Factor 200 20 Hz 20 kHz Overall Gain Bal or Unbal 27 dB Common Mode Rejection Ratio 90 dB 20 Hz 20 kHz Absolute Phase Non inverting Pin 2 Positive Inputs 1 pair...

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