JEFF ROWLAND CONTINUUM 250 Manual de usuario

OWNER’S MANUAL CONTINUUM 250/500 INTEGRATED AMplIfIER

TABLE OF CONTENTS

OWNER’S MANUAL Continuum 250/500 integrated amPLiFier

Introduction 2

Product Features 3

Package Contents 4

Initial Inspection 5

Maintenance & Cleaning 6-7

Protection Systems 7

Installation, Use & Care 8-9

Remote Transmitter Operation 10-11

Front Panel Functions 12-13

Rear Panel Signal Connections 14-15

Rear Panel Power Connections 16-17

Specications 18

Dimensions 19

Optional Adjustments 20-25

PO BOX 7231, COLORADO SPRINGS, COLORADO 80933 USA E-mAIL: jRDG@jEffROwLAND.COm www.jEffROwLAND.COm TELEPHONE (719) 473-1181

If you have any additional questions regarding

the installation or operation of the CONTINUUM

Integrated

Ampliﬁer, please contact your

authorized Jeff Rowland Design Group dealer

or check the Jeff Rowland Design Group web

site at www.jeffrowland.com.

Enjoy the music!

Jeff Rowland

President,

Jeff Rowland Design Group

ampliﬁer. A thorough understanding of the

operational features will allow you to gain the

maximum performance and

ease of use for

which this amplifer was designed. Please note

that your

CONTINUUM Integrated

Ampliﬁer

serial number begins

with the letters “

.”

This serial number is located on the rear

panel of the chassis. Please include this

number with any correspondence regarding

your

CONTINUUM Integrated

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

hope that these qualities will enrich your

experience and

pride of ownership.

Welcome to the Jeff Rowland Design

Group “family” and congratulations on your

purchase of what is unquestionably one

of the world’s ﬁnest integrated ampliﬁers.

With its

combination of features such as

precision electronic circuitry, exceptional

efﬁciency, and accurately machined chassis

compo

nents throughout, your CONTINUUM

Integrated

Ampliﬁer will offer you many

years of musically satisfying enjoyment.

Please take a few minutes to read the

remainder of this Owner’s Manual before

proceeding with the installation of the

INTRODUCTION

OWNER’S MANUAL Continuum 250/500 integrated amPLiFier

• Two pairs XLR input connectors for

balanced system congurations.

• Two pairs RCA input connectors for

unbalanced system congurations.

• One pair high-current, balanced

line level outputs plus one pair RCA

unbalanced outputs to allow for

driving of multiple ampliers for

bi-amplication, subwoofers, etc.

• Fully-balanced inputs provide

universal compatibility with other

components and eliminate ground

loop noise and EMI.

• Fully-balanced topology

implemented

in both input and output circuitry.

• Bypass function allows for transpar-

ent use in combination audio/home

theater systems.

• Low noise, high-current, switch-

mode power supply provides highest

performance at any world-wide

mains operating voltage.

• Low power consumption permits

constant power-up operation to

eliminate warm-up time.

• Optical encoder type volume control

maintains quiet, trouble-free perfor-

mance and accuracy over the entire

lifetime of the product.

• Dual range volume control allows

large volume level changes when

knob is rotated abruptly, yet allows

small, precise volume level changes

when knob is rotated slowly.

• Six function, hand-held infrared

remote transmitter.

• Ultra-low resonance, structurally

rigid chassis,

precision-machined

from solid blocks of aircraft grade

6061-T6 aluminum billet.

• Optional plug-in phono cards

(installed internally) convert Line

Input 1 to high performance phono

inputs. Three gain and loading

options can accommodate moving

magnet (MM), moving coil (MC)

cartridge types and high output

moving coil cartridge types.

PRODUCT FEATURES

OWNER’S MANUAL Continuum 250/500 integrated amPLiFier

PO BOX 7231, COLORADO SPRINGS, COLORADO 80933 USA E-mAIL: jRDG@jEffROwLAND.COm www.jEffROwLAND.COm TELEPHONE (719) 473-1181

Ensure that all of the auxiliary components listed below are enclosed within the shipping carton

and accessory box. Refer to the illustrations and verify that the proper components are included.

PACKAGE CONTENTS

OWNER’S MANUAL Continuum 250/500 integrated amPLiFier

AC POWER CABLE

REMOTE TRANSMITTERCONTINUUM INTEGRATED AMPLIFIER

INPUT

MUTE

BAL L

BAL R

VOL

OWNER’S MANUAL

WARRANTY REGISTRATION

WARRANTY CARD

Inspect the shipping container for damage. If any portion of the shipping container, packing material,

ampliﬁer, or accessories are damaged or missing, notify your dealer and the shipper (if a claim is to

be made) immediately.

NOTE:

Many shippers require notication and inspection within 24 hours of delivery to determine the nature of damages incurred.

Your CONTINUUM Integrated

Ampliﬁer

has undergone extensive performance evaluations, listening

tests, quality control inspections, and a minimum 72 hour burn-in period prior to shipment and

should

therefore be in perfect operating condition upon delivery. If the ampliﬁer does not operate

correctly, please notify your dealer immediately.

We strongly suggest that you save all of the packing materials. If the ampliﬁer is returned to your

dealer or JRDG, the original packing materials must be used for shipment to avoid possible damage.

Neither JRDG 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 JRDG issue a Return Authorization

(RA) number prior to shipment.

INITIAL INSPECTION

OWNER’S MANUAL Continuum 250/500 integrated amPLiFier

PO BOX 7231, COLORADO SPRINGS, COLORADO 80933 USA E-mAIL: jRDG@jEffROwLAND.COm www.jEffROwLAND.COm TELEPHONE (719) 473-1181

All JRDG products are designed to provide a

lifetime of enjoy-

ment and listening pleasure. The

CONTINUUM Integrated

Ampli-

ﬁer is uniquely constructed from a solid block of precision-

m a c h i n e d

aluminum.

It’s chassis is sealed to prevent dust from entering the

interior of the chassis and thus should never need interior cleaning

during the life

time of the product. All internal circuitry is

mainte-

nance-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 appear-

ance. 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.

• Please allow the front panel, which is coated with an automotive-grade polyure-

thane nish, 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.

• The front panel of the unit should never be cleaned with anything other than a very

soft cotton cloth and plain water or ne oil-based furniture polish. Because of the

ne nish of the front panel, use of any other cleaning agent may permanently

scratch the nish.

• The top cover, sides and bottom are protected by a durable black anodized nish

and can be cleaned with a soft cotton cloth (such as an optical lens cleaning cloth

or ne furniture polishing rag) 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.

Maintenance & cleaning

OWNER’S MANUAL Continuum 250/500 integrated amPLiFier

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

CONTINUUM Integrated

Ampliﬁer, please contact your dealer or

the JRDG

factory 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.

NOTE: Cleaner/polish should be applied directly to the cloth and not the chassis.

Protection SyStemS

The

CONTINUUM Integrated

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 amp

liﬁer

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.

PO BOX 7231, COLORADO SPRINGS, COLORADO 80933 USA E-mAIL: jRDG@jEffROwLAND.COm www.jEffROwLAND.COm TELEPHONE (719) 473-1181

Locate the ampliﬁer as close as possible to its ﬁnal installation point. Allow access to the rear panel

for making connections. Due to it’s design, the

CONTINUUM Integrated

Ampliﬁer is energy efﬁcient,

eliminating the need for large heatsinks or forced-air cooling. However, the Continuum 500 should be

placed to allow ventilation around all sides to prevent overheating.

The efﬁcient and compact design of the CONTINUUM allows it to be installed in any number of music,

ﬁlm

and surround sound systems. For connection instructions for a typical two-channel stereo system,

please see page 14 and 15 of this manual. For instructions regarding the use of the BYPASS INPUTS

for surround sound or home theater system use, please see page 15 of this manual.

The main components of the CONTINUUM are precision-machined from solid blocks of aluminum

to create as rigid an enclosure as possible, impervious to lateral and torsional forces. The ampliﬁer

chassis is particularly non-resonant; however, various damping and resonance control accessories

may be used to yield greater audio performance in some audio systems.

InstallatIon, Use & care

OWNER’S MANUAL Continuum 250/500 integrated amPLiFier

The JRDG CONTINUUM

Integrated 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:

• Do not expose the amplifer

to rain, moisture, or excessively

damp conditions.

• Due to auto-ranging circuitry and

dual-stage voltage regulation, the

audio performance of the

CONTINUUM 500 will not be

affected by any voltage uctuations

within the operating voltage range.

The CONTINUUM 500 Integrated

Amplier can be operated at any

mains voltage over the range of 85

to 265 VAC without any adjustments

necessary. The CONTINUUM 250

Integrated Amplier requires internal

voltage change.

• The CONTINUUM Integrated Amplier

must not be modied in any way,

other

than according to ofcial service

bulletins from JRDG. Otherwise, the

factory warranty will be immediately

voided.

• Be sure the amplier is muted

(red front panel indicator light on)

before

connecting or disconnecting

any

interconnect cables.

• When operating the CONTINUUM,

properly grounded AC receptacle

should be used. A potential shock

hazard may result if the supplied

3-wire, grounded AC cable ground leave power switch ON and plug/

terminal is defeated or lifted or unplug unit from wall.

the unit is connected to a 2-wire

ungrounded AC outlet.

• The CONTINUUM is designed to per-

form

optimally with no adjustments

maintenance for the lifetime of the

product. Do not attempt to open the

bottom cover of the amplier and

refer all service issues to qualied

personnel. The voltages inside the

CONTINUUM can be hazardous.

• Because of the energy efciency

of the CONTINUUM, there is no need

to unplug the unit when not in use;

however, the amplier can be muted

if desired. The rear panel AC mains

switch is not intended for daily use.

Switch failure may result. Simply

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