JEFF ROWLAND 525 Скачать руководство пользователя страница 7

SPECIAL DESIGN FEATURES

MACHINED ALUMINUM CHASSIS:

 Precision-machined chassis with integrated heat-sinks, 

milled from a solid block of aircraft grade aluminum, provides exceptional thermal 
heat transfer/dissipation, RFI/EMI shielding, resonance control, and minimizes micro-
phonically induced micro-vibrations from any source.

CERAMIC CIRCUIT BOARDS:

 All audio circuits are implemented on mil-spec, multi-layer, 

low dielectric constant, Rogers™ ultra-rigid ceramic circuit board substrate for 
extremely low energy retention and absorption. Large low impedance ground planes 
areas for extended internal star-grounding.

BALANCED TOPOLOGY:

 Inherent cancellation e

ects of balanced topology implemented 

throughout all power and input/output circuits ensures greatly reduced distortion and 
noise under dynamic signal conditions.

HIGH-PRECISION SURFACE MOUNT COMPONENTS: 

Extensive use of Lead (Pb)-free, low 

temperature coe

cient, active and passive surface-mount components results in 

signi

fi

cantly smaller loop areas, reduced circuit capacitance and inductance, and 

introduces less noise than conventional leaded components.

THIN-FILM RESISTORS: 

All resistors are low noise, 0.1% thin-

fi

lm type for extremely low 

thermal noise which complement the low-noise characteristics of the active circuitry.

TEFLON COATED WIRES:

 All signal carrying input and output wires are te

fl

on coated, 

also for low dielectric energy storage, further ensuring that each audio note 
reproduced naturally decays into the deeper silence of the music.

TRANSFORMER-COUPLING AND ISOLATION: 

Transformer coupled input circuitry provides 

universal component compatibility and virtually eliminate ground loop noise and RFI/
EMI. Transformer coupling ensures identical ampli

fi

er overall gain when using 

unbalanced input adapters.

ACTIVE POWER FACTOR CORRECTION:

 

Power Factor Correction (PFC) integrated into 

the power supply reduces AC line harmonic noise pollution and increases AC line 
power utilization to 99%.

HIGH-EFFICIENCY SWITCH-MODE POWER SUPPLY: 

Highly e

cient, compact, light weight, 

1500 watt DC switch-mode power supply provides optimum voltage regulation for all 
circuits and operating conditions, and allows for quiet operation over a wide range of 
AC mains power sources.

 

MODEL 525 STEREO AMPLIFIER

 

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Содержание 525

Страница 1: ...MODEL 525 STEREO AMPLIFIER Operational Manual Jeff Rowland Design Group 2013 All Rights Reserved...

Страница 2: ...ult 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 PROTECTIVE SYSTEMS The MODEL 525 is equipped with internal...

Страница 3: ...the right to inspect any product which is subject to any warranty claim prior to repairing or replacing it Final determination of warranty coverage lies solely with Je Rowland Design Group Inc Said de...

Страница 4: ...ding our commercial warranty policies GUIDE USE This guide is designed to make installing and using this product as easy as possible Information in this document has been carefully checked for accurac...

Страница 5: ...you to gain the maximum performance and ease of use for which this amplifier was designed Please note that your MODEL 525 serial number begins with the letters BA Please include this number with any...

Страница 6: ...Placement 9 Front Panel Operations 10 Rear Panel Connections 11 Connecting to Loudspeakers Stereo Mode 12 Connecting to Loudspeakers Bridge Mode 13 Connecting to Loudspeakers Bi Amp Mode 14 Switching...

Страница 7: ...and inductance and introduces less noise than conventional leaded components THIN FILM RESISTORS All resistors are low noise 0 1 thin film type for extremely low thermal noise which complement the lo...

Страница 8: ...es the amplifier into standby mode 1 watt consumption An internal switch allows the user to dim the front panel indicator light ring or shut o the light altogether when the amplifier is powered on REM...

Страница 9: ...ONTHS 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 SHOU...

Страница 10: ...rongly suggest that you save all of the packing materials If the amplifier is returned to your dealer or Je Rowland Design Group the original packing materials must be used for shipment to avoid possi...

Страница 11: ...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 amplifier is op...

Страница 12: ...s 5 LOUDSPEAKER OUTPUT B Positive terminal Use with LOUDSPEAKER OUTPUT A Positive terminal for Bridge Tied Load BTL See CONNECTING TO LOUDSPEAKERS BRIDGE MODE for detailed instructions 6 LOUDSPEAKER O...

Страница 13: ...CONNECTING TO LOUDSPEAKERS STEREO MODE Figure 3 Stereo Mode loudspeaker connections MODEL 525 STEREO AMPLIFIER PAGE 12...

Страница 14: ...CONNECTING TO LOUDSPEAKERS BRIDGE MODE Figure 4 Bridge Mode loudspeaker connections MODEL 525 STEREO AMPLIFIER PAGE 13...

Страница 15: ...CONNECTING TO LOUDSPEAKERS BI AMP MODE Figure 5 Bi Amp Mode loudspeaker connections MODEL 525 STEREO AMPLIFIER PAGE 14...

Страница 16: ...2 Remove all 12 screws attaching the bottom cover to chassis Set bottom cover and screws aside 3 Release blue ribbon cable from green circuit board with thumbs Figure 6 4 Bend blue ribbon cable backwa...

Страница 17: ...Figure 7 Blue Ribbon Cable in Open Position Figure 8 SW1 Dip Switch in Stereo Position Figure 9 SW1 Dip Switch in Bridge Position MODEL 525 STEREO AMPLIFIER PAGE 16...

Страница 18: ...0 kHz 3 dB Input Impedance 40k ohms THD Noise 0 05 20 Hz 20 kHz Damping Factor 1000 1 kHz Overall Gain Bal or Unbal 26 32 dB BTL Inputs 1 pair Balanced XLR Outputs 1 pair parallel binding posts Amplif...

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