Bose 901 Bedienungsanleitung

฀฀฀฀฀฀฀Owner’s Guide

Brugervejledning

Bedienungsanleitung

Guía del usuario

Notice d’utilisation

Manuale d’istruzioni

Gebruiksaanwijzing

Bruksanvisning

฀฀฀฀฀฀



฀To reduce the risk of ﬁre or electric shock, do not expose the system to rain or

moisture.

฀The apparatus shall not be exposed to dripping or splashing, and objects ﬁlled with

liquids, such as vases, shall not be placed on the apparatus. As with any electronic products, use

care not to spill liquids into any part of the system. Liquids can cause a failure and/or a ﬁre hazard.

CAUTION

These CAUTION marks are located on the bottom of your 901®active equalizer:

The lightning ﬂash with arrowhead symbol, within an equilateral triangle, is intended to alert the

user to the presence of uninsulated dangerous voltage within the system enclosure that may be

of sufﬁcient magnitude to constitute a risk of electric shock.

The exclamation point within an equilateral triangle, as marked on the system, is intended to alert the

user to the presence of important operating and maintenance instructions in this owner’s guide.

฀To prevent electric shock, match wide blade of plug to wide slot, insert fully.

฀Where the mains plug or appliance coupler is used as the disconnect device, such discon-

nect device shall remain readily operable.

฀฀

See the additional instructions on the Important Safety Information page enclosed with this

owner’s guide.

฀฀฀฀

Please take the time to follow this owner’s guide carefully. It will help you set up and oper-

ate your system properly, and enjoy all of its advanced features. Save your owner’s guide for

future reference.

฀

registered trademarks of Bose Corporation.

฀฀Serial numbers are located on the bottom panel of each 901 speaker and on the back of the

active equalizer.

Loudspeaker Serial Numbers:_______________________________________________________

Active equalizer Serial Number: _____________________________________________________

Dealer name: _____________________________________________________________________

Dealer phone: _______________________ Purchase date: _____________________________

We suggest you keep your sales slip and warranty card together with this owner’s guide.



฀฀Contents

Where to ﬁnd… ............................................................................................................. 3

Warranty period............................................................................................................. 3

Customer service .......................................................................................................... 3

Setting Up

Before you begin ........................................................................................................... 4

Unpacking the cartons .................................................................................................. 4

System compatibility..................................................................................................... 5

Choose the support for your speakers.......................................................................... 6

Choosing the location for your speakers ...................................................................... 6

Speaker connections..................................................................................................... 8

Equalizer connections ................................................................................................... 9

Testing the speakers and equalizer ............................................................................. 12

Using other equipment................................................................................................ 13

Using your 901®Series VI speaker system

Playing your speakers ................................................................................................. 14

Adjusting the sound .................................................................................................... 15

Equalizer compatibility ................................................................................................ 16

Connecting additional speakers.................................................................................. 16

Maintaining Your 901 speaker system

Cleaning your speakers............................................................................................... 17

Troubleshooting........................................................................................................... 17

Product Information

Technical information .................................................................................................. 18

Accessories ................................................................................................................. 18

Bose Corporation...................................................................................... inside back cover

฀

The Bose®901 speakers and active equalizer are covered by a limited 5-year transferable

warranty. Details of the warranty are provided on the warranty card that came with your

system. Please ﬁll out the information section on the card and mail it to Bose Corporation.

฀

For additional help in solving problems, contact Bose customer service. See the inside back

cover for Bose customer service ofﬁces and phone numbers.

A free booklet is available: Guide to Optional System Connections for Bose 901®Direct/

Reﬂecting®Speaker Systems. Ask for part number 149393.



฀฀฀

Thank you for purchasing the Bose®901®Series VI Direct/Reﬂecting®speakers. They represent

the best in Bose Corporation speaker design and engineering and will give you many years of

listening pleasure.

The installation and operating principles of this system are signiﬁcantly different from those of

conventional speakers. To obtain the best possible performance and avoid problems, please

take the time to read this guide.

฀You must have a Bose 901 active equalizer for a complete 901 speaker system. The

use of 901 Series VI speakers without the 901 Series VI active equalizer will result in improper per-

formance. The use of graphic or parametric equalizers, instead of the Bose 901 equalizer, will result

in unsatisfactory performance.

Conventional graphic and parametric equalizers may be used in addition to, but not in place

of the Bose 901 active equalizer. However, the use of such additional equalizers is not recom-

mended since it will not improve system performance. For adequate performance you must

use the 901 Series VI active equalizer with these speakers.

฀฀

A complete Bose 901 Series VI speaker system consists of three matched components: two

901 Direct/Reﬂecting®speakers and a separate 901 Series VI active equalizer. Two cables are

included to connect the active equalizer to your receiver or ampliﬁer. The 901 speakers and

equalizer are packed in three separate cartons. Carefully unpack your system, saving all pack-

ing materials for possible future use.

Inspect the speakers and equalizer. If any part appears damaged, do not attempt to use the

system. Repack the speakers and equalizer in their original cartons and notify your authorized

Bose dealer immediately.

฀Now is a good time to record the serial numbers of each speaker and the active equalizer.

Please write them on your warranty card and in the spaces provided on page 2. The serial num-

bers are located on the bottom of the 901 speakers and on the back of the equalizer.

฀Each speaker carton weighs over 35 lb (16 kg). Use good lifting practice to avoid

injury.

฀To avoid danger of suffocation, keep the plastic bags out of the reach of children.

฀฀

What comes in the three cartons:

• Two 901 speakers

• One 901 active equalizer

• Two equalizer cables



฀฀

Bose®901®Series VI speakers and Series VI active equalizer work with your stereo

components to produce a superb music system. The active equalizer is an integral part

of the system and may be connected in a variety of ways, depending on the components

you have. The two most common methods are described in this guide. Using different

components may require different connection methods. More information is available by

calling Bose Corporation. Ask for the free booklet, Guide to Optional System Connections

for Bose 901 Direct/Reﬂecting®Speaker Systems, part number 149393.

Your 901 speakers are designed to work compatibly with receivers or ampliﬁers rated from

10 to 450 watts per channel. In this guide, the term receiver is used to refer to an integrated

preampliﬁer and power ampliﬁer (which may also contain an AM/FM tuner). The term

ampliﬁer is used to describe conﬁgurations involving separate preampliﬁer and ampliﬁer

components.

Most receivers have a TAPE MONITOR connection. The 901 active equalizer is most

commonly connected to the tape monitor connections on the receiver. If you plan to

connect a tape recorder, use the set of inputs and outputs located on the back of the 901

active equalizer marked TAPE RECORDER CONNECTIONS.

If you have recently purchased a home theater receiver, you may be considering using

your 901 speakers for the front channels. Your home theater receiver must have accessible

PRE AMP OUT/MAIN AMP IN connections for the front channels if you are to use your 901

speakers in this way. These may also be called the ADAPTER or SIGNAL PROCESSOR

connections.

฀

Follow these steps, in the order below, to install your 901 Series VI speaker system.

1. Choose the best locations and support for the 901 speakers (page 6).

2. Connect the speakers to the ampliﬁer or receiver (page 8).

3. Connect the 901 active equalizer to the ampliﬁer or receiver using either the TAPE

MONITOR or PRE AMP OUT/MAIN AMP IN connections (page 9).

4. Test the system to see that the audio signal is correctly processed by the active equal-

izer (page 12).



฀฀฀฀฀฀

Choose locations for your 901®speakers that use the walls to best advantage by reﬂecting

sound throughout the listening room. Refer to the drawing on page 7.

฀฀฀

Place the speakers along the same wall (see Figure 3):

• 4 to 12 feet (1.2 – 3.6 m) apart, with the V-shaped rear of the speaker between 8 and 18

inches (20 – 45 cm) from the rear wall. Do not aim the V toward a corner.

• 18 inches (45 cm) of clear space around the sides, top, and bottom of the speakers.

• at least 2 feet (60 cm) from sound-absorbent furnishings.

• 18 to 48 inches (45 – 120 cm) from the side and rear walls.

• 18 to 36 inches (45 – 91 cm) from the ﬂoor or ceiling. Do not place the speakers exactly

halfway between ﬂoor and ceiling.

Within these guidelines, remember that the closer the speakers are placed to a reﬂective

surface, like a wall, the more bass is reproduced.

฀฀฀฀฀

You may place 901 speakers on a table or shelf. You may also use Bose®ﬂoor pedestals, or

suspend the speakers from your ceiling. Refer to Figure 3 on page 7.

฀฀฀฀฀฀฀฀

Although each speaker weighs 35 lb (16 kg), a suitable shelf or table must be able to support

140 lb (64 kg). Keep an adequate distance between the speakers and the rear wall as listed in

“Guidelines for placement” above.

฀฀฀฀฀฀

Use only Bose pedestals (PS-6) as ﬂoor stands. They are designed to provide the proper

support and are available through your authorized Bose dealer. Please read the pedestal

attachment instructions before making any speaker connections. Four pilot holes on the

bottom of each speaker (see Figure 2, hole set A) are pre-drilled for the purpose of anchoring

the speaker to the pedestal.

฀฀฀฀฀฀

Use these guidelines to ensure safe suspension of your 901 speakers. Three steel support

chains are recommended. We cannot specify the ceiling attachments. The type to use

depends on the type of building construction.

฀Do not mount on surfaces that are not sturdy enough, or that have hazards con-

cealed behind them, such as plumbing or electrical wire. If you are unsure of your ability to install

these speakers, contact a qualiﬁed professional installer.

Note:฀฀The speakers hang in an inverted position, with the terminal connections facing up.

Carefully rotate the Bose logo 180˚ (so it appears right side up) before hanging the speakers.

฀฀

Pedestal (A) and ceiling mount

(B) pilot holes



฀฀฀฀฀

• Screw hooks support the chains at the ceiling. They must have at least a #10 wood thread

with a shank diameter of at least 3⁄16 inch (4.5 mm). They should be long enough to go

through any plasterboard and still have at least one inch (25 mm) of thread left to pene-

trate a wood beam. For a masonry ceiling: use only high-quality metal expansion masonry

anchors that ﬁt the thread of the ceiling hooks.

• Chain: diameter should be at least 5⁄32 inch (0.135 in. or 4 mm).

• Screw eyes with S hooks attach chains to the speaker and must have at least a #10 wood

thread with a shank diameter of at least 3⁄16 inch (4.5 mm) or larger.

• All hardware (screw hooks, chain, screw eyes, S hooks) must have a manufacturer’s safe-

load rating of 40 lb (18 kg) or more.

฀฀฀฀

• Suspend the speakers 18 – 36 inches (45 – 91 cm) from the ceiling; do not mount them

ﬂush to the ceiling.

• To ensure an accurate stereo image, the distance from the ﬂoor should be three to ten feet

(1 – 3.5 m). Be sure the speakers are no less than 18 inches (45 cm) from the ﬂoor. Do not

suspend the speakers exactly halfway between the ﬂoor and ceiling.

฀If the speakers are more than 10 feet (3 m) from the ﬂoor, we suggest you lengthen the

chain supporting the rear of the speaker. By doing this you will allow the rear of the speaker,

housing eight of the nine drivers, to be angled slightly downward.

฀฀฀฀฀฀

1. Ceiling: Anchor at least two screw hooks into a rigid structural ceiling support (beam, joist,

or masonry anchor). Drill pilot holes into wood using a 1⁄8inch drill bit (3.7 mm), if neces-

sary.

2. Speaker: Use the three pre-drilled pilot holes (see Figure 2 - hole set B) on the bottom of

each speaker. Use a 1⁄8inch drill bit (3.7 mm) to enlarge the pilot holes to accept the #10

thread screw eyes. Drill to a depth of 1⁄2inch (12 mm) in the speaker cabinet. Do not drill

completely through the cabinet.

฀Contact Bose®for more information on suspending speakers. See the inside back cover

for phone numbers. For details on your speciﬁc ceiling construction, consult a qualiﬁed building

contractor or professional installer.

฀฀

Mounting guidelines

18 – 48”

(45 – 120 cm)

18 – 36” (45 – 91 cm)

4 – 12’

(1.2 – 3.6 m)

18 – 48”

(45 – 120 cm)

4 – 12’

(1.2 – 3.6 m)

18 – 36” (45 – 91 cm)

8 – 18” – (20 – 45 cm)



฀฀

With your speakers in their chosen locations, connect them to the receiver.

฀฀

It is important to use the right thickness of speaker wire. For distances of up to 30 feet (9 m),

18 gauge (.075 mm2) 2-conductor wire works well. For distances greater than 30 feet (9 m),

refer to the wire recommendations chart on page 18.

Note: To determine if this wire is suitable for use in a wall or under a ﬂoor, check your local build-

ing codes. You may want to contact a qualiﬁed electrical installer for this information.

฀฀฀

Examine the speaker wire. Note that it is actually a pair of insulated wires that may be gently

pulled apart. The insulation around one wire is marked with a stripe, collar, rib, groove, or

printing. Use the marked wire as positive (+) and the unmarked wire as negative (-). These

wires correspond to the positive and negative terminals on the speaker and receiver.

฀It may be difﬁcult to distinguish wire markings. Inspect both wires carefully.

To prepare the ends of each wire:

1. Strip approximately 1/2inch (12 mm) of insulation from both wires.

2. Twist the bare ends of each stranded wire, to prevent strands from touching across

terminals.

฀฀

฀฀Before making any connections, turn off your receiver and unplug it from the AC

(mains) power outlet. Not doing this may result in damage to your system.

Speaker terminals are located on the bottom of each speaker. Unscrew the knurled nut on

each terminal and remove one washer. Wrap one bare wire end around the terminal post.

Then, replace the metal washer on the screw post and screw the knurled nut ﬁrmly back on.

1. Connect one wire pair to the right speaker (the one on your right as you face it).

a. Attach the marked wire at one end to the positive (+) terminal.

b. Attach the plain wire at that end to the negative (-) terminal.

2. Connect the other ends of the same wire pair to the RIGHT SPEAKER OUTPUT of your

receiver.

a. Attach the marked wire to the positive (+) terminal.

b. Attach the plain wire to the negative (-) terminal.

3. Following the steps above, connect the second pair of wires to the left speaker and to the

LEFT SPEAKER OUTPUT on the receiver.

฀If your receiver offers a choice of output impedances, use the terminal marked 8 or 8

ohms.



฀฀฀฀

Make sure the terminal knurled nut is tightened down ﬁrmly. Any gap between the wire and

terminal can cause heat build up. Check to be sure the wires are connected positive to posi-

tive (+ to +) and negative to negative (- to -). Make sure no loose strands of wire touch across

terminals, which can cause short circuits.

฀฀

Connecting the speakers to the

receiver

฀

There are two options for connecting the equalizer. Your choice depends on the type of

receiver you own and whether you plan to use the system primarily for stereo or for home

theater enjoyment.

฀฀฀฀฀฀

The Bose®901®active equalizer connects directly to your receiver through the tape monitor

connection. If your receiver has more than one tape connection, use the second one (TAPE 2).

To connect a tape deck, use the additional set of inputs and outputs located on the back of the

901 active equalizer marked TAPE RECORDER CONNECTIONS.

The TAPE MONITOR switch on the front of the receiver lets you switch the equalizer in and out

of the signal path. This is important when you want to play conventional, non-equalized speak-

ers or headphones attached to your receiver. See Using other equipment on page 13.

฀If your receiver is designed for home theater use, it may not have a Tape Monitor switch.

If not, you must use a PRE AMP OUT/MAIN AMP IN connection. This may also be called the

ADAPTER or SIGNAL PROCESSOR connection. Refer to “Home theater use (PRE AMP OUT/

MAIN AMP IN)” on page 10 for instructions on how to connect for home theater use.

1. Disconnect any external tape deck or signal processor connected to the tape monitor

connection.

2. Use the twin cable assemblies (with two connectors at each end) that are supplied with

the equalizer. Use the red connector for the right (R) channel connections and the other

connector for the left (L) channel connections.

Receiver

L R

+ – + –



฀

3. Connect one end of a cable to the AMPLIFIER INPUT jacks on the 901®active equalizer.

a. Insert the ﬁrst connector ﬁrmly into the INPUT jack marked R.

b. Insert the second connector into the INPUT jack marked L.

4. Connect the other end of the cable to the OUT or RECORD jacks on your receiver. These

jacks may be marked TO INPUT, FROM INPUT, or REC.

a. Insert the ﬁrst connector into the OUT or RECORD jack marked R.

b. Insert the second connector into the OUT or RECORD jack marked L.

5. Connect the second cable from the AMPLIFIER OUTPUT jacks on the 901 active equalizer

to the IN or TAPE jacks on your receiver. These jacks may be marked PLAY, TO OUTPUT,

FROM OUTPUT, or MONITOR.

6. Plug the power cord of the 901 active equalizer into one of the switched outlets on the

receiver so that it will be powered when the receiver is switched on.

฀฀

Connecting to the tape monitor

connection

฀฀฀฀฀฀฀

Use these instructions:

• for stereo-only operation if your receiver does not have a TAPE MONITOR connection.

• if you are using a surround sound receiver that has a section on the back marked PRE AMP

OUT/MAIN AMP IN. The jacks may be labeled ADAPTER or SIGNAL PROCESSOR.

฀If your receiver does not have this PRE AMP OUT/MAIN AMP IN section, the 901

speakers will not be usable in your home theater system.

1. The PRE AMP OUT/MAIN AMP IN jacks on your receiver are usually connected by small

bars called horseshoe pins. Remove these pins. See Figure 6.

฀฀

Removing horseshoe pins

Amplifier or Receiver

MAIN

AMP

PRE

AMP

OUT

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