Jeff Rowland M-2 Owners manual

JEFF ROWLAND

DESIGN GROUP

Model 2

Stereo Power Amplifier

Owner’s Manual

Introduction

W

elcome to the Jeff Rowland Design Group “family” and congratulations on your purchase of what is unquestionably

one of the world’s finest audio power amplifiers.

þ With its combination of industrial grade active and passive devices,

precision electronic circuitry and accurately machined chassis components throughout, your Model 2 Amplifier will offer

you many years of musically satisfying enjoyment.

þ Please take a few moments to read the remainder of this Owner’s

Manual.

þ A thorough understanding of the operational features will allow you to gain the maximum performance and

ease of use for which this Amplifier was designed. Please note that your Model 2 Stereo Amplifier serial number begins

with the letter A.

þ This number is recorded below and is also located on the rear panel of the chassis. þ Please

include this number with any correspondence regarding your Model 2 Amplifier.

þ It has been my joy to create an

audio component of enduring value which will reflect a higher ideal of musical and artistic expression.

þ It is my hope

that these qualities will enrich your experience of ownership.

Enjoy the music!

Jeff Rowland

President

þ Jeff Rowland Design Group, Inc.

2911 North Prospect Street

Colorado Springs, CO 80907

Phone: [phone]

Fax: [phone]

Product Features

þ XLR Balanced Input jacks for balanced (Differential Mode™) system

configurations

þ XLR to RCA Input adapters included

þ User-selectable overall gain of 26 or 32 dB
þ User-selectable input impedance of 36kΩ (HI) or 600Ω (LO)

þ All internal signal circuitry is totally isolated from chassis and system

ground potentials to eliminate noisy ground loops and to provide
extreme immunity from RF interference

þ Optional remote (wired or wireless power ON/OFF switching)

þ Automatic temperature stabilizing circuitry maintains constant

operating temperature

þ Standby power condition reduces warm-up time

þ Fail-safe operation provided by user-resetable AC circuit breaker

located on rear panel

þ Quiet, transient-free operation during power and function mode

switching

þ Automatic input muting under anomalous input or output operating

conditions

þ Balanced Differential Mode™ circuit topology implemented from input

to output

þ Plug-in modules, containing critical electronic circuitry, enhance

thermal stability, mechanical integrity and serviceability

þ Low-resonance, structurally integrated chassis of precision machined

aluminum alloy components.

Introduction / Product Features

1

2

3

4

5

6

Contents

Initial Inspection

I

nspect the shipping container for damage. If 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). Note: Many shippers
require notification and an inspection within twenty-four (24) hours of
delivery to ascertain the nature of damages incurred.

Your Model 2 Amplifier has undergone extensive performance evaluations,
listening tests, quality control inspections and a minimum seventy-two (72)
hour burn-in period prior to shipment and should be in a perfect operational
condition upon receipt. If the Amplifier does not operate correctly, please
notify your dealer immediately.

We strongly suggest that you save all packing materials. If the Amplifier is
returned to your dealer or Jeff Rowland Design Group, the original packing
materials must be used for shipment. 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 a
Return Authorization number be issued by Jeff Rowland Design Group
prior to shipment.

Contents

E

nsure that all of the auxiliary components listed below are enclosed
within the accessory box. Refer to the diagrams illustrated above and
verify the components included.

1 AC power cable

2 Two (2) XLR/RCA adapters

3 Four (4) spiked coupling interface supports

4 Four (4) compliant isolation interface supports

5 One (1) speaker terminal hand wrench (7/16 inch)

6 One (1) warranty card (in some countries warranties are provided by

the respective importer)

Initial Inspection / Contents