BluCube CXC?650 Guide de dépannage

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BluCube®CXC Series

Circular, flush-mount, in-wall/in-ceiling loudspeakers

Owner’s Manual & Installation Guide

CXC‐650

CXC‐800‐3

CXC‐650‐S

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Introduction

Thank you for your purchase and welcome to the growing number of satisfied BluCube listeners. Please

read the following installation and operation guidelines carefully to ensure enjoyment of your home audio

system for years to come.

Although we recommend that BluCube flush-mount loudspeakers should be fitted by competent installation

technicians, installation is also well within the means of a competent DIY enthusiast when performed with

the aid of this instruction guide. You may also find it useful to visit our web site for the latest tips and

techniques on installation.

Your BluCube flush-mount loudspeakers are designed to blend into your home interior while providing

superior sound quality. At BluCube we continuously strive to improve our products and it is for this reason

that we reserve the right to change product specifications without notice. The information concerning

product specifications and instructions in this manual do not necessarily set forth all technical or other

specifications of BluCube products.

Important Safety Information

•Do not use this or other electrical equipment near water or other liquids

•Clean only with a dry cloth

•Do not block any ventilation openings. Install in accordance with all safety standards and

regulations.

•Do not install near any heat sources such as stoves, radiators, heat registers, amplifiers or any

other apparatus producing heat.

•Use attachments and accessories as indicated by the manufacturer.

•No user-serviceable parts inside. Refer all servicing to qualified service personnel.

•Warning: To reduce the risk of fire or electrical shock, do not expose this apparatus to rain,

moisture or other liquids.

•Warning: To prevent injury, this apparatus must be securely attached to the wall/ceiling in

accordance with the installation instructions. No naked flame sources such as candles should be

placed close to the product.

•Caution: Changes or modifications not expressly approved by the manufacturer could void the

warranty on the apparatus.

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Features

Your BluCube®loudspeakers feature the following:

•Woven Kevlar®Cones: Kevlar®has physical properties that make it ideal for loudspeaker drivers

and consequently is found in many of the world’s finest loudspeakers. Its combination of stiffness

and strength-to-weight ratio means that it results in a more precise and defined sound reproduction.

•Titanium tweeters: Another feature often found in the world’s finest loudspeakers. The stiffness

and lightness of a titanium dome tweeter results in cleaner, brighter audio definition.

•Adjustable tweeters: The tweeters in your BluCube loudspeakers are mounted in an orbital socket

and can be adjusted by gently pressing on their edge. This adjustment allows for directing the

sound when the speaker may need to be offset from an ideal listening position due to aesthetic or

physical reasons.

•Stable tweeter housing: The tweeters in our circular flush-mount loudspeakers are mounted on a

supremely stable bridge rather than on a central pole as found in many current designs. This allows

the speaker to handle more power with increased cone stability resulting in lower harmonic

distortion.

•4/8 ohm impedance switching on the circuit board: The ability to switch between 4 ohms and 8

ohms impedance is useful to match the speakers to your amplifier and is also useful if you wish to

set up multiple pairs of speakers connected to a single amplifier.

•Attenuation Switches: Your BluCube loudspeakers are fitted with high frequency (tweeter) and

low frequency (woofer) attenuation switches (and midrange on CXC-800-3). These enable you to

adjust the sound properties of the speaker to suit your personal listening preferences and the

acoustic properties of the room in which you are installing them.

•Cut-out template: BluCube loudspeakers come with a cut out template to allow the installer to

accurately measure the hole to be cut out in the wall or ceiling surface resulting in an easier

installation process.

•Paint Mask: BluCube loudspeakers come with a paint mask to allow the installer to protect the

surface of the tweeter and the woofer cone while (optionally) painting the surrounding speaker

baffle.

•Pre-construction bracket: All BluCube loudspeakers come with tough, plastic pre-construction

brackets. Their use is optional, but can be very helpful to the installation process at the time the

plasterboard is about to be attached to the wall/ceiling. Therefore they would be used only during

more extensive renovations and not when fitting the loudspeakers into an existing surface.

•Paintable Grilles: Your BluCube loudspeakers come with steel grilles pre-painted in white. These

may be painted if required. Important: Please refer to the section later in this manual on painting

grilles before embarking on this.

•Grille removal tool: Your BluCube loudspeakers come with a pair of finger hooks to facilitate the

removal of the grilles in the event that you wish to adjust or remove your loudspeakers.

•Installation Guide: This installation guide is included with your BluCube loudspeakers. From time

to time we will publish updates to the guide and so you may wish to refer to our web site for the

most up to date version.

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StereoSoundLayout

BluCube CX-Series loudspeakers

feature swivelling tweeters to aim

sound directly at the listening area

to compensate for offset mounting.

Installation Guide

It is BluCube’s aim to continuously improve our products. We therefore

reserve the right to change product specifications without notice. The

information concerning product specifications in this manual do not

necessarily set forth all technical or other specifications of BluCube

products. Additional information may be obtained from our web site:

www.blucubespeakers.co.uk.

Speaker Placement

The pivoting tweeters in BluCube loudspeakers are able to compensate for

unusual placements of the speakers themselves. However, the ideal

positioning of the speakers should be at equal distances from the intended

listening area and along a common wall. This helps to ensure the best

stereo effect.

Naturally, intended listening positions are rarely static and they may vary

quite considerably within a room. In these circumstances, you can

confidently compromise on the ideal location and use the pivoting tweeter to

assist without impacting your listening pleasure.

2-Channel Audio Placement

In standard two channel audio systems, the ideal distance between the left

and right channel speakers should be in the range of 1.8m to 3.0m apart. If

the layout of the joists and light fittings permit, the speakers should be

equidistant from the most commonly envisaged listening position.

Distributed Audio Placement

In some cases, where the room is large, you may wish to consider the use

of two (or more) pairs of speakers in order to provide a wider and more

even dispersion of sound. A more even dispersion in this way means that

people within the room are more likely to be equidistant from the speakers

so that there are no hot or cold spots of audio volume.

BluCube loudspeakers possess extremely smooth and predictable off-axis

frequency response. The chart below shows how far apart the speakers can

be placed in a distributed audio system. Again, this is a guide and should

not be treated as mandatory. The calculations are based on a +/- 45 degree

coverage from the speaker and listener ear heights using 1.5 metre for a

standing and 0.6 m for a seated listener.

Approximate speaker spacing by ceiling height

Ceiling Height Standing Listener Seated Listener

2.4m Ceiling height 1.7m 2.8m

3.0m Ceiling height 2.9m 4.0m

3.6m Ceiling height 4.1m 5.2m

4.2m Ceiling height 5.3m 6.4m

To ensure the best stereo effect, place

speakers along a common wall equal

distances from the intended listening area

ListeningArea

Left

Channel

Right

Channel

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When connecting more than one pair of speakers to an amplifier it is vital to

ensure that impedances are matched. Your amplifier will specify an

impedance range with which it can handle and you must ensure you do not

drop the total impedance below the minimum level or you may damage your

amplifier. Conversely if the total impedance is too high, sound quality will be

adversely affected. If in doubt you should consult a professional installer or

contact BluCube directly before commencing installation.

As an example, a typical amplifier may specify an operational acceptable

impedance range of 4 to 8 ohms. If you connect two pairs of BluCube

Loudspeakers (set to 8 ohm impedance on the circuit board) in parallel, the

impedance you will present to the amplifier is 4 ohms. This is within limits. If

you connect them in series, you will present 16 ohms resistance to the

amplifier which will have a negative effect on sound quality.

If you switch the impedance of your BluCube loudspeakers to 4 ohms and

connect two of them in parallel, then the impedance will be 2 ohms and may

damage your amplifier. If they are connected in series, the impedance will

be 8 ohms and therefore within acceptable limits.

Please note that, much like attaching a trailer to the back of a car, attaching

a second set of speakers to an amplifier will put additional load on the

amplifier (or engine). This makes it work harder for the same performance

or it may simply not have the power to perform at all. You need to check the

capability of your chosen amplifier before tackling this.

Home Theatre Placement

When using the speakers as rear channel speakers in a home cinema

environment, they should be ideally located between 0.4 to 1.8m behind the

main listening position. They should be separated approximately 1.8m to

3.0m apart.

Wire Gauge and Quality

A good rule of thumb to consider when installing speakers is that the total

wire resistance should be less than 10% of the speaker impedance. If using

an 8 ohm speaker, your wire resistance should therefore be no more than

0.8 ohms.

The resistance of any wire is directly proportional to its length. So if you

double the length, you double its resistance.

Home Theatre (Dolby 5.1)Layout

Subwoofer

Centre

RightFront

LeftFront

Listening/ViewingArea

LeftRearRightRear

TV

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Additional resistance has an increasingly negative effect on sound quality of

a speaker. The sound becomes less dynamic, the definition of the bass

frequencies can be reduced and, in more extreme cases, the high

frequencies can be attenuated. Amplifier power is wasted in the wire,

reducing the maximum power output of the system.

You may find the following chart helpful when deciding on the appropriate

wire gauge for your installation.

Running Speaker wires

Each BluCube loudspeaker will require a separate two-core speaker cable

run from the speaker to the chosen location of your amplifier. In the case of

the CXC-650-S (a single-stereo loudspeaker incorporating both left and

right channels) you must treat this as a pair and run two 2-core speaker

cables from the speaker to the amplifier.

Running cables during a renovation or a new construction project is

obviously more straightforward than running cables after decoration has

been completed. Here are some thoughts on how to make the wiring easier

and most discrete.

Are you using a regular infra-red controlled amplifier?

An infra-red controlled amplifier requires line of sight between the infra-red

remote control and the infra-red receiver. This means the amplifier needs to be

on display or an infra-red extender needs to be used to relay the infra-red signal

to the amplifier. The location of the amplifier in this case is determined by the

control system and is thus less flexible in terms of the cable runs.

Are you using a wireless-controlled amplifier?

If you use a system such as Sonos®, that uses wireless technology for remote

control and audio distribution, you can position the amplifier in a location that

minimises cable runs as well as the disruption to the decor of your property. For

example, in the case of Sonos®, you could locate the amplifier in a cupboard,

adjacent room, or even the attic. This is because the amplifier does not need to

be visible in order for it to be controlled as it is controlled and receives the audio

content wirelessly. For more information visit

www.blucubespeakers.co.uk/sonos.

Wire resistance (Ohms) versus length of cable run

Cable Length (metres)

Wire Gauge 15m 30m 45m 60m 75m 90m

20 gauge 0.86 1.73 2.59 3.45 4.32 5.18

18 gauge 0.65 1.30 1.94 2.59 3.24 3.89

16 gauge 0.43 0.85 1.28 1.71 2.14 2.56

14 gauge 0.27 0.54 0.81 1.08 1.35 1.62

12 gauge 0.17 0.34 0.51 0.68 0.85 1.02

10 gauge 0.11 0.22 0.33 0.44 0.56 0.67

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When installing in an existing

construction, take care not to cut

through any existing wiring or

plumbing.

Installing your loudspeakers during a new

construction/renovation

If you are installing your flush-mount BluCube loudspeakers during a

renovation or new construction, you will probably have the benefit of

exposed joists, ceilings and stud walls. This makes the running of the

speaker cables very much more straightforward.

The mounting surfaces used should be at least 10mm thick to ensure safety

and speaker stability.

Your BluCube loudspeakers come with pre-construction brackets. These

can be optionally used to assist with installation. They can be nailed or

stapled between the joists or studs in the planned speaker position with the

flange of the speaker cutout facing out.

As the plasterboard is fitted you will find it easier to accurately cut out the

necessary hole for your BluCube loudspeaker reducing installation time and

debris when the speakers are being fitted.

Installing your loudspeakers in an existing

construction

If you are installing your flush-mount BluCube loudspeakers after a

renovation or new construction has been completed, installation may be a

little more challenging as you may have to fish cables to minimise any

disruption to the decor of your home.

Note: Wirelessly Controlled amplifiers. The use of wireless amplifiers (such as

those found in the Sonos®Music System) will greatly assist the installation of

flush-mount speakers in homes where construction is already completed. For

instance, if you are wishing to install your BluCube loudspeakers in upstairs

rooms, consider whether the attic space is a suitable location for your amplifier.

This would greatly reduce the cable runs required and almost certainly avoid

redecoration needs. Alternatively, consider whether the cables may be run

across the attic and down into an adjacent room.

If you wish to install your BluCube loudspeakers in downstairs rooms, identify

their desired positioning and consider what room is above this location. For

instance, maybe it is a bedroom and maybe it is possible to lift the carpet and

floorboards to access the void and hence to enable the cable runs to the

speakers below. It may then be possible to locate the amplifier conveniently in

the room above

The benefit of using wireless technology in this context is the ability to locate the

amplifiers in locations that will minimise the need for disruption to and

redecoration of the wall or ceiling surfaces. For more information visit:

www.blucubespeakers.co.uk/sonos.

Woodstud/joist

Cutoutforspeakerinplasterboard

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The first step in installing flush-mount loudspeakers in a pre-existing

construction is to establish the location of the ceiling joists or wall studs.

You may be able to do this by lifting upstairs floorboards or stud finding

tools. If not, you may need to make pilot holes and a probe but recognise

this may entail making good afterwards.

Once a suitable location is identified, you will need to cut out the correct

size opening in the surface of the plasterboard using the supplied cut-out

template and a padsaw. You should make a pilot hole first and take care not

to cut into pre-existing electrical cables or pipe-work.

You will need to run speaker cable from the opening back to the amplifier

(in the case of the Single-stereo model CXC-650-S you will need two

cables). Ensure you comply with any building codes that may apply in your

location.

Fitting the speaker into the cut-out opening

Before inserting the speaker into the opening in the wall/ceiling, attach the

speaker cable(s) to the speaker, taking utmost care to ensure the correct

polarity of the speaker wires as this is critical to the correct operation of the

speakers.

Insert the speaker housing into the opening and tighten the mounting

screws to engage the “swing-dog” fasteners. Be careful to not over-tighten.

The “swing-dog” fasteners will clamp the speaker frame and the mounting

surface together.

To insert the speaker grille, start on one edge and slowly work your fingers

around the grille edges to ease into the groove. Make sure all edges are in

the groove before applying pressure to insert. It is a snug fit. Do not push on

the centre of the grille. If the grille is not going in, it means that not all edges

are in the groove. Ease the grille off and start again.

If the grille needs to be removed, use the supplied finger hook tools to

gently ease it out of the housing.

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Painting the speakers and grilles.

Both the speaker frames and the grilles can be painted, if desired. We recommend doing this

before installation to avoid a paint scar or meniscus forming around the frame edge. If the speaker

frame is painted after installation, use the supplied paint mask to protect the speaker drivers

during painting.

Always paint the grilles separately from the speaker itself. The grilles should only be spray painted

and with the use of thinned paint to avoid clogging of the fine mesh of the grille. Thin the paint

with 5 parts thinning agent to 1 part paint.

Only install the speakers and grilles once the paint has dried thoroughly.

Single-Stereo (CXC-650-S) model

The 650-S model uses the same installation procedure as other models but needs two speaker

cables as it produces both left and right channel audio signals from one speaker housing. It is

ideally suited to smaller rooms such as bathrooms. The crossover circuit board on the speaker

features two sets of push-to-connect terminals and it is essential that the correct polarity of the

connections to your amplifier is maintained. If the sound from the speaker lacks definition, it is

highly likely the polarity is incorrect. It does not matter which speaker terminals are connected to

the left or right channel on your amplifier, but the correct polarity is critical.

Setting the Tone Control

Blucube CX-series loudspeakers feature baffle-mounted level controls for both bass and treble

frequencies. The level control will help you to fine-tune the performance of the crossover to meet

any demanding room acoustic issues or listener preferences.

Each level control adjusts an octave wide band of frequencies most affected by the interaction

between the drivers. The controls can be adjusted to provide 3dB of boost or 3dB of reduction on

each of the drivers in any CX-series loudspeaker.

The level controls are able to help you maximise sound quality regardless of room setup and

speaker placement.

Adjusting your speakers

Note: Do not apply pressure to the tweeter dome itself. The pivoting tweeter can be used to direct

sound towards or away from a listening area. To pivot the tweeter, apply light pressure to the

plastic ring around the outside edge of the tweeter.

If your speakers are widely separated and the music fails to blend into a central image when the

system is operated in stereo mode, you should orientate the tweeters toward the listening area.

If you are using your BluCube loudspeakers in a home theatre environment, you can point the

pivoting tweeter towards a wall or window to create a diffuse surround effect.

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BluCube®CX‐SeriesSpecifications

CXC-650 6.5” 2-Way Circular Flush-Mount speaker

Woofer: 6.5” woven Kevlar cone, rubber surround, 22oz magnet, bumped back plate, 1” voice coil, vented pole piece

Tweeter: 1” Titanium Dome Tweeter, Ferro-fluid cooled, Neodymium magnet, 30° swivel & pivot

Crossover: FR4 board, 18dB per octave for both woofer and tweeter sections, Polyimide auto-protective reset switch for

tweeter, 16AWG wire connection to woofer section, gold plated terminal posts will accept 14AWG wire

Attenuation Switches: ± 3dB on woofer and tweeter

Frequency Response: 45Hz – 22KHz

Sensitivity: 88dB 1W/1M

Recommended amplifier power: 10-125 watts per channel

Impedance: 4 / 8 ohm switchable on PCB

Cut-out size: 7.95” (200mm)

Depth behind surface: 4.0” (100mm)

Weight (pair package): 12 lbs (5.7 kg)

Dimensions (pair package): 10.7” (H) 10.4” (W) 15” (L) (26.9 x 26.1 x 37.6 cm)

CXC-800-3 8.0” 3-Way Circular Flush-Mount speaker

Woofer: 8.0” woven Kevlar cone, rubber surround, 25oz magnet, bumped back plate, 1.25” voice coil, vented pole piece

Midrange: 3” woven Kevlar cone, rubber surround

Tweeter: 1” Titanium Dome Tweeter, Ferro-fluid cooled, Neodymium magnet, 30° swivel & pivot

Crossover: FR4 board, 18dB per octave for both woofer and tweeter sections, Polyimide auto-protective reset switch for

tweeter, 16AWG wire connection to woofer section, gold plated terminal posts will accept 14AWG wire

Attenuation Switches: ± 3dB on woofer, midrange and tweeter

Frequency Response: 40Hz – 22KHz

Sensitivity: 89dB 1W/1M

Recommended amplifier power: 10-150 watts per channel

Impedance: 4 / 8 ohm switchable on PCB

Cut-out size: 9.5” (23.9 cm)

Depth behind surface: 4.72” (11.8 cm)

Weight (pair package): 16.75 lbs (7.6 kg)

Dimensions (pair package): 13.0” (H) 12.2” (W) 17.4” (L) (32.6 x 30.6 x 43.7 cm)

CXC-650-S 6.5” Single-Stereo Image Circular Flush-Mount speaker

Woofer: 6.5” woven Kevlar cone, 22oz magnet, bumped back plate, dual 1” voice coil, vented pole piece

Tweeter: Dual 19mm Titanium Dome Tweeters, Ferro-fluid cooled, Neodymium magnet, 30° swivel & pivot

Crossover: FR4 board, 18dB per octave for both woofer and tweeter sections, Polyimide auto-protective reset switch for

tweeter, 16AWG wire connection to woofer section, gold plated terminal posts will accept 14AWG wire

Frequency Response: 45Hz – 22KHz

Sensitivity: 88dB 1W/1M

Recommended amplifier power: 10-100 watts per channel

Impedance: 8 ohm per channel

Cut-out size: 7.95” (200mm)

Depth behind surface: 3.82” (960mm)

Weight (single package): 6.5 lbs (3.0 kg)

Dimensions (single package): 8.0” (H) 11.0” (W) 11.0” (L) (20.1 x 27.6 x 27.6 cm)

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