B and K Reference 7260 Mk2 Owners manual

Reference 7250/7260

series II

Five/Six Channel Amplifier

OWNER’S MANUAL

B & K Components Ltd.

P/N 13007 Rev.0004

B&K Components, Ltd 2100 Old Union Road Buffalo, New York 14227

P/N 13007 Rev.0004

Table of contents

Safety Precautions page 2
Purpose and function page 3
Design and construction page 3
Features page 3
Rear panel view page 4
Rear panel description page 4 - 6

Level controls page 5
Inputs page 5 - 6
Outputs page 6

Control Muting page 8 - 9
System installation page 7
Making the connection page 7 - 8
Troubleshooting page 10
Care and cleaning page 10
Specifications page 11
Warranty page 12

Accessories included: Manual and Power cord

Page 1 P/N 13007 Rev.0004

SAFETY PRECAUTIONS

PLEASE READ BEFORE INSTALLING

WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT
TO RAIN OR MOISTURE.

The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the
user of the presence of uninsulated “dangerous voltage” within the product’s enclosure
that may be sufficient magnitude to constitute a risk of electric shock to you.

The exclamation point within an equilateral triangle is intended to alert the user of the
presence of important operating and maintenance (servicing) instructions in the literature
accompanying the unit.

Ÿ Observance of polarity is essential. Double-check connections before turning the

amplifier on. The amplifier can be damaged if polarities are incorrect.

Ÿ Damage can occur to your speakers if the power rating* of each individual driver is

exceeded by the amplifier. Make sure that all the drivers in your speaker system
are capable of handling not only the power being delivered by the amplifier, but
the energy that is likely to be generated during strong passages.

Ÿ Turn amplifier ‘off’ before plugging in or unplugging input and speaker cables!!!
Ÿ The Reference 7250/7260 series II is equipped with raised feet so that continuous

ventilation can be maintained. They help to keep acoustic feedback into the

amplifier at a minimum. They also provide a measure of protection against

scratching any surface the unit might be resting on. Do not alter or remove them.
Ÿ Do not stack anything on top of the amplifier (preamplifier, processor,

source...etc.).

Ÿ Leave at least 2-3 inches clearance from the top of the amplifier to the next shelf,

component, etc., to insure proper ventilation.

* If you are at all unsure of what the speaker ‘ratings’ are, contact your dealer.

Page 2 P/N 13007 Rev.0004

The Reference 7250/7260 series II purpose and function

The Reference 7250/7260 series II is a high current, five/six channel power amplifier. It
is designed to be used in all types of audio or audio/video systems.

Design and construction

The Reference 7250/7260 series II utilizes high quality electronic circuitry to achieve an
environment wherein a detailed, transparent, and highly musical sound can be realized.
The high quality parts complement includes state-of-the-art solid state devices, 1% metal
film resistors, computer grade electrolytic power supply capacitors, and a high capacity
toroidal transformer.

The Reference 7250/7260 series II operates class A predriver and AB high current
MOSFET power output stages. It is capable of reproducing the most demanding audio
signals at rated power levels.

Features

Toroidal Transformers - Efficient, high current, shielded transformer.
Discrete Circuitry - More accurate and three dimensional reproduction of

source material.

Class A Predriver - Improves low level detail for smoother, more musical

sound.

AB MOSFET Output Stage - For efficient linear power delivery and protection from

thermal overload

Gold Plated Connectors - Improved connections for better sound and minimized

signal loss and degradation.

1% Metal Film Resistors - Low noise resistors for better sound and a greater

degree of repeatability.

High Current - Ability to reproduce demanding recordings.
Computer Grade Capacitors - Large capacity computer grade electrolytic capacitors for

extended low frequency control and improved dynamics.

Fused Outputs - Provides protection from accidental shorting of amplifier

outputs.

Heavy Duty Binding Posts - Improved current carrying capacity and ease of use.

Page 3 P/N 13007 Rev.0004