Bose B1500, B2000 Owner's Manual

B1

500 / B2000 Power Amplifiers

Owner s Guide

Designed for

2

1.

Safety Information

Safety Warning

This unit is fitted with a 3-wire power connector. For safety reasons, the earth lead
should not be disconnected in any circumstance. If ground loops are encountered

consult the section on input connections later in this manual.

Please pay special attention to the AC power considerations part in chapter 4 and
the

Maintenance

part in chapter 6.

To reduce the risk of fire or elec

tric shock, do not expose the unit to rain or

moisture.

To avoid electrical shock disconnect from the mains supply before removing the
cover. The installation of Bose® Equaliser cards or servicing should be carried
out by qualified personnel only.

Please

read this owner s guide

The Model B

1500

and B2000 Professional Stereo Power Amplifiers are carefully
engineered to provide excellent sonic performance. This guide will help you set up
and operate your system correctly.

Record your serial number here:

Mod

el B

1500

Professional Stereo Power Amplifier: ___________________________
Model B2000 Professional Stereo Power Amplifier: ___________________________
Date of purchase ___________________ Retailer s name ______________________

For ease in obtaining service, we recommend that you keep your purchase receipt, or
a copy of the receipt, in this owner s guide.

3

Contents

1.

Safety Information 2

2. Before you begin

2.1. Unpacking

the Amplifier ...

......

4

3. The B1500

and B2000 Prof

essiona

l Power Amplifiers .. 5

4. Installation

4.1. Location and general precautions

.

6

4.2. Mechanical

considerations 6

4.3. Thermal

co

nsiderations

.........

6

4.4.

AC power considerations .. 6

4.5. Magnetic le

akage and R.F interference considerations

7

4.6.

Inputs .. ...

......

8

4.7. Link

ing amplifiers.

10

4.8. Bridged mono

operation .

...10

4.9.

Outputs . .11

5. Operation

.

5.1.

Switching on .12

5.2.

Level controls .. 12

5.3. Signal

indicators ...12

5.4.

Limiters

12

5.5.

Temperature control ...

..... 12

5.6.

Fault indicators .12

5.7. Bridged L

ED

12

6. Faults / Fus

es

/ Maintenance ....13

7. Bose EQ Card

s .14

7.1. B1500

EQ card fitting

. .14

7.2. B2000

EQ card fitting

...

........

15

7.3. EQ card fitting for b

ridged mono

operation . 16

8. Technical Specifi

cation .. 17

9. Declaration of

Conformity . 18

4

2.

Before You Begin

Congratulations on your purchase of a

new BOSE® Professional Stereo Power
Amplifier. The product has been designed to provide excellent sonic quality and has
been

engineered for reliability.

2.1 Unpacking the amplifier

Carefully unpack your amplifier. Keep the original carton and packing materials for
possible future use. Check for any visible signs of damage. If the amplifier appears
damaged, do not try to use it. Notify the Bose Product Support or your authorised
Bose Pro

Partner

.

5

3. B1500

/

B2000 Power Amplifiers

The B

1500

or B2000 Amplifier is a no compromise, high quality, class AB power

amplifier.

Fan speed is varied as required to keep the amplifier within its temperature limits.
Signal limiters are included to protect speakers from clipped signals.

The amplifiers include full DC and short circuit protection on the outputs to ensure
trouble

-free service in harsher environments.

The B

1500

& B2000 amplifiers are a good power match for BOSE mid/high and bass

loudspeaker products, especially in foreground entertainment systems.

The B

1500

amplifier is rated at

450

watts per channel 8 ohms and

715 watts per

Channel

into 4 ohms and

1025

watts per channel into 2 ohms. In bridged mono

operation, it is rated at

1430

watts into 8 ohms and

2050

watts into 4 ohms.

The B2000 amplifier is rated at 560

watts per channel 8 ohms and

925 watts per

Channel

into 4 ohms and 1300 watts per channel into 2 ohms. In bridged mono

operation, it is rated at

185

0 watts into 8 ohms and 2600 watts into 4 ohms.

The inputs of each amplifier are high quality, electronically balanced and have high
common-mode rejection for exceptional hum and noise rejection. In ad

dition, both the

B

1500

and the B2000 amplifiers are equipped with internal connectors that enable the
use of BOSE Equalisation cards (EQ cards) one for each channel. This allows for
different equalisation for each channel if required (provided the correct

equalisation

cards are installed). Equalisation cards are available for the entire range of B

OSE

professional

loudspeakers that require dedicated product equalisation.

A sample setup might involve one B

1500 power

amplifier driving two channels

of

BOSE 802® III loudspeakers in stereo mode. A second Model B

1500

power

amplifier

in bridged mono mode could be added to drive a BOSE

502®B bass module.

Alternatively, just one amplifier could be used to drive the BOSE

802® III

loudspeakers on one channel and the BOSE

502®B module on the other channel.
Many configurations are possible. This flexibility can be achieved by installing the
EQ cards for the desired setup.

6

4. Installation

4.1 Location and general precautions

Locate the unit where it will not be exposed to rain or moisture. If fluid or a foreign
object enters the unit, disconnect the power plug. Do not pull by the cord; grasp the
plug firmly. Contact an authorised dealer or service centre.

Locate

the unit where it will be protected from heat and allow adequate ventil

ation.
Place it away from direct heat sources, such as heating vents and radiators. Make sure
the ventilation holes are not covered and air can circulate freely behind, beside, and
above the unit.

4.2 Mechanical considerations

When mounting the amplifier in a rack or enclosure ensure the rear of the unit is
adequately supported. The brackets, which are supplied, fit standard 19-inch (483mm)
rack mounting systems. THE FRONT PANEL IS NOT CAPABLE OF

SUPPORTING THE UNIT ON ITS OWN.

4.3 Thermal consideration

s

When mounting the amplifier in a rack or enclosure ensure

THERE IS ADEQUATE

VENTILATION.

The cooling fans suck cool air in through the front and blow hot air

out at the rear of the unit through the ventilating grills. IF THIS AIR IS NOT
ALLOWED TO ESCAPE, OVERHEATING WILL OCCUR. Take care when
mounting other equipment in the same rack.

4.4 AC power considerations

The

B

1500

and B2000 power amplifiers have been manufactured to comply with
local power supply requirements. Both have been set at a mains voltage of 240Volts.
Be sure to

connect

your power amplifier to a supply capable of supplying the correct

voltage and adequate current to allow full-

power

operation of the power amplifier.
The current demand of a power amplifier varies depending on the impedance of the
load,

the output level of the power amplifier and content of the program material.
Before connecting the unit to the supply, ensure that the voltage (printed on the rear
panel

of the amplifier) is correct and that a mains fuse of the correct type and rating
has been fitted in the fuse holder on the rear panel of the amplifier (The B2000 is
fitted with a circuit breaker and hence does not have a mains fuse on the rear panel).
Mains cabling to both the B

1500

and the B2000 should be protected by suitable over

current device.

Note:

To convert the B

1500

and B2000 to 220V operation, one should proceed as follows

(see also

the following picture):

Locate the violet & brown wires from the mains transformer to the PCB spade
connectors marked up as Live Tx and Spare Tx . Connect the violet wire to Live