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PRECAUTIONS

PLEASE READ CAREFULLY BEFORE PROCEEDING 

Please keep this manual in a safe place for future reference.
This product is a speaker system designed for background music and public address
applications in places such as stores, restaurants and other commercial spaces. 
Do not use for any purposes other than the one intended. Those who are 
unfamiliar with handling or those who can not handle according to this manual, 
should be supervised by responsible persons to ensure safety.
Always consult a professional installer if the product installation requires 
construction work.

 WARNING

Always follow the basic precautions listed 
below to avoid the possibility of serious 
injury or even death from electrical shock, 
short-circuiting, damages, fire or other 
hazards. These precautions include, but 
are not limited to, the following:

If you notice any abnormality

• If any of the following problems occur, 

immediately turn off the power of the amplifier.
- Unusual smells or smoke are emitted.
- Some object, or water has been dropped 

into the product.

- There is a sudden loss of sound during use 

of the product.

- Cracks or other visible damage appear on 

the product.

Then have the product inspected or repaired 
by qualified Yamaha service personnel.

Do not open

• This product contains no user-serviceable 

parts. Do not attempt to disassemble the 
internal parts or modify them in any way.

Water warning

• Do not expose the product to rain, use it near 

water or in damp or wet conditions.

Fire warning

• Do not place any burning items or open flames 

near the product, since they may cause a fire.

Hearing loss

• Before turning the power of all devices on or off, 

make sure that all volume levels are set to the 
minimum. Failing to do so may result in hearing 
loss, electric shock, or device damage.

• When turning on the AC power in your audio 

system, always turn on the power amplifier 
LAST, to avoid hearing loss and speaker 
damage. When turning the power off, the 
power amplifier should be turned off FIRST for 
the same reason.

Location and connection

• Always consult a professional installer if the 

product installation requires construction work, and 
make sure to observe the following precautions.
- Choose mounting hardware and an 

installation location that can support the 
weight of the product.

- Avoid locations that are exposed to constant 

vibration.

- Use the required tools to install the product.
- Inspect the product periodically.

• Do not place the product in an unstable position 

or a location with excessive vibration, where it 
might accidentally fall down and cause injury.

 CAUTION

Always follow the basic precautions listed 
below to avoid the possibility of physical 
injury to you or others. These precautions 
include, but are not limited to, the following:

Location and connection

• Keep this product out of reach of children. This 

product is not suitable for use in locations 
where children are likely to be present.

• Do not place the product in a location where it 

may come into contact with corrosive gases or 
salt air. Doing so may result in malfunction.

• Do not place the product in a location where it 

may be exposed to smoke or oil vapors, or 
where any of its parts might deteriorate and 
cause malfunction.

• Before moving the product, remove all 

connected cables.

• Use only speaker cables for connecting 

speakers to the speaker jacks. Use of other 
types of cables may result in fire.

Handling caution

• Do not insert your fingers in any gaps or 

openings on the product (clamps or moving 
parts on the rails).

• Do not rest your weight on the product or place 

heavy objects on it.

• When choosing a power amplifier for use with 

this product, make sure that the output power 
of the amplifier meets the following conditions:
- When using a low-impedance connection, 

make sure that the output power of the 
amplifier is lower than the power capacity of 
this product.

- When using a high-impedance connection, 

be sure that the total rating of the transformer 
taps of the speakers does not exceed the 
output power of the amplifier.

If the output power is not appropriate, 
malfunction or fire may occur.

• Do not input excessively loud signals that may result 

in clipping in the amplifier or cause the following:
- Feedback, when using a microphone
- Continuous and extremely loud sound from a 

musical instrument, etc.

- Continuous and excessively loud distorted 

sound

- Noise caused by plugging/unplugging the 

cable while the amplifier is turned on

Even if the output power of the amplifier is 
lower than the power capacity of this product 
(program), damage to the product, 
malfunction or fire may occur.

PA_en_12

General Specifications

Unpacking

Unpack the contents and confirm that 
all the following items are included.

• Speaker × 1
• Grille  ×  1
• Safety wire × 1
• Cutout template × 1
• Owner’s Manual (this manual)

* Speaker cable is not included.

The following Reinforcing Bracket 
Kit is included only with VC8NB, 
VC8NW, VC6NB, VC6NW.

• Tile rails × 2
• C-ring × 1
• Screws (S-TITE M4, 8 mm) × 2

Optional Items (sold separately; VC4NB and VC4NW only)

Reinforcing Bracket Kit (AB-C2)

Bundled Items

• Tile rails × 2
• C-ring × 1
• Screws (S-TITE M4, 8 mm) × 2

* In this manual, the installation method using the AB-C2 Reinforcing Bracket Kit 

is also explained.

Material and weight of the Reinforcing Bracket Kit (AB-C2): steel, 1.0 kg

*1 : Half-space (2π)
*2 : Calculated based on power rating and sensitivity

The contents of this manual apply to the latest specifications as of the publishing date. To obtain the latest manual, access the Yamaha website then download 
the manual file.
The dimensions are shown in “Dimensions” on the back side of the manual.

VC4NB VC4NW

VC6NB VC6NW

VC8NB VC8NW

System Type

2-way coaxial type (without back can)

Components

HF

0.8" film dome

0.8" soft dome

1" soft dome

LF

4" (10 cm) cone

6.5" (16 cm) cone

8" (20 cm) cone

Nominal Impedance

16 Ω

Frequency Range 

*1

(-10 dB)

85 Hz - 20 kHz

63 Hz - 20 kHz

52 Hz - 20 kHz

Coverage Angle 

*1

160° conical

120° conical

110° conical

Power Rating

NOISE

15 W

25 W

25 W

PGM

30 W

50 W

50 W

MAX

60 W

100 W

100 W

Sensitivity 

*1

(1 W, 1 m)

88 dB SPL

89 dB SPL

91 dB SPL

Maximum SPL 

*2

(Calculated, 1 m, 
Peak)

106 dB SPL

109 dB SPL

111 dB SPL

Transformer Taps

100 V

1.5/3/6 W

3/6/12 W

3/6/12 W

70 V

0.8/1.5/3/6 W

1.5/3/6/12 W

1.5/3/6/12 W

Overload Protection

Full-range power limiting to protect network and transducers

Connector

Push terminal (WAGO 294 /2 pin) × 1

Wire size: Solid conductor min. AWG18 (0.75 sq), max. AWG12 (3.5 sq)

Standard conductor min. AWG18 (0.75 sq), max. AWG14 (2 sq)

Baffle

PP, black

Grille

Metal Grille

Punching metal, Powder coating

black (Munsell N3) / white (Munsell N9.3)

Trim Ring

ABS, black (Munsell N3) / white (N9.3)

Dust-proof bag

Artificial fiber, black

Dimensions (Including grille)

Ø225 × D103 mm

Ø286 × D114 mm

Ø325 × D131 mm

Weight (Including grille)

1.4 kg

2.3 kg

2.8 kg

Cutout size

Ø186 mm

Ø247 mm

Ø285 mm

Required ceiling board thickness

2 mm - 37 mm

Conduit tube

Ø15.4 mm - Ø21.3 mm

Packaging

1 pc

Included in the 
package

Grille, Safety wire, Cutout template, Owner's Manual

Reinforcing 
Bracket Kit

C-Ring, Tile Rails × 2

C-Ring, Tile Rails × 2

Optional accessories

AB-C2

Installing the Speaker

Before installing the speaker onto the ceiling, ensure that the strength of the 
ceiling rail is sufficient.

Pre-installation (Preparation of the Cable)

• For cables attached to the spring type connector, strip the insulation as 

shown in the figure and connect them.

1.

Put the supplied cutout template to the ceiling and draw a circle by tracing it.
Make sure to use the cutout template so that hole is the correct diameter.
If you use a circular cutter, set the diameter using the cutout template.

2.

Cut the hole by tracing the circle.

1.

Pull the wiring from the power amplifier through the cut hole of the ceiling.

2.

Insert the cable into each terminal. 
Insert the cable while holding the lever, and when fully inserted, release 
your finger from the lever to securely connect. 
(Lever operation is not required for solid core wire.)
Make sure that the cables cannot be pulled out.

NOTE

The example illustrations in this manual are of the VC4NB.

CAUTION

Be careful not to hurt your hands when handling this product.

NOTICE

When installing the speakers, turn off the power amplifier.

NOTE

Do not plate core wires by soldering if the cable uses stranded wire. 
Doing so will cause the wire to break.

Cut Out a Hole in the Ceiling

CAUTION

Wear goggles to prevent chips or powder entering your eyes 
while cutting the hole.

When the included Reinforcing Bracket Kit or AB-C2 (sold 
separately) is used

For the VC8NB, VC8NW, VC6NB, and VC6NW, the included 
Reinforcing Bracket Kit must be used. 
For the VC4NB and VC4NW, follow the instructions when using the AB-
C2.

1.

Insert the two tile rails through the cut hole and place them on the 
ceiling surface within your reach. Adjust their length and be sure that 
each of the tile rails are oriented as shown below.

2.

Use the opening in the C-ring to slide one section of the C-Ring into 
the cut hole, continuing to slide it around until the C-ring is 
completely inside the ceiling.

3.

Secure the C-ring and tile rails with the supplied two screws through 
either slot of both C-ring brackets.

About 8-9 mm

Compatible cable:
Min. AWG18 (0.75 sq)
Max. AWG12 (3.5 sq) for solid core wire/
AWG14 (2 sq) for stranded wire

1

C-ring

C-ring

Tile rail

Connect the Wiring to the Connector

2

Cable

Spring type 
terminal 

Safety wire

The dust-proof bag has notches at the 
spring type terminal and a safety wire so 
that you can work with the dust-proof 
cover attached.

From amplifier or 
previous speakers

To subsequent speakers

Spring type terminal 

While holding down lever...

Insert cables

Release lever

1.

From the hole on the top of the dust-proof cover, attach the safety wire 
to the safety wire ring, and connect the wire to an independent support 
point, such as a joist.

2.

Push the speaker slowly up into the ceiling, taking care not to trap the 
speaker cable or safety wire.

3.

While lifting up the speaker, turn the screwdriver clockwise to tighten the 
attachment screw.
The first turn of the attachment screw opens the clamp. Further turns 
move the clamp down the channel to pull the speaker up into the ceiling.
When the clamp is difficult to open, turning the screwdriver halfway 
counterclockwise once will make it easier to open the clamp.

Select the line voltage/impedance (100 V, 70 V, 16 Ω) and power tap for a 
100 V, 70 V line distributed system, by rotating the tap selector switch on 
the front side of the speaker with a flat-blade screwdriver.
When using the speaker with high-impedance connection, select the 
position where wattage is indicated by the line (100 V, 70 V). Do not select 
the “ × ” setting when connecting to a 100 V line.
When using it with low impedance connection, select the 16 Ω position.

1.

Align the grille with the cabinet’s 
face and fit them together.

2.

Turn clockwise (approx. 30°) to 
secure the grille.

Fix the Speaker onto the Ceiling

CAUTION

Always take measures to prevent the speaker from falling 
down.
If the safety wire is too short, prepare another wire appropri-
ate for the speaker weight and installation conditions.

NOTICE

Do not over-tighten the attachment screws. Otherwise, the attachment 
screws and clamps will break.

3

Safty wire ring

Safety wire

Safety wire

Speaker cable

Safety wire

Speaker cable

(VC4NB, VC4NW, VC6NB, 
VC6NW, VC8NB, VC8NW)
When the included Reinforcing 
Bracket Kit or AB-C2 (sold 
separately; VC4NB and 
VC4NW only) is used.

(VC4NB, VC4NW)
When the AB-C2 Reinforcing 
Bracket Kit (sold separately) 
is not used.

Attachment 
screw

Clamp

Removing from the Ceiling

1.

While pressing the speaker against the ceiling, loosen the 
attachment screws by turning them counterclockwise.
Loosen the screw and the clamp goes up, and as it reaches the top, 
the clamp closes as shown in figure below.

2.

Remove the safety wire from the speaker that is detached from the 
ceiling.

Set the Line Voltage/Impedance and Power

NOTICE

• Make sure the amplifier is switched off before operating the tap selector 

switch.

• If the setting is incorrect, it may cause malfunction of the speaker and 

amplifier.

Attach the Grille

CAUTION

• If the grille is not sufficiently turned, it may fall off. Sufficiently 

turn the grille, until the fastening sections of the grille and 
speaker are securely engaged.

• If the ceiling material is soft, the baffle surface may sink into 

the ceiling material due to overtightening of the attachment 
screws, and the grill may not fit properly.

Clamp

4

The illustration indicates the setting at 6 W for a 
100 V line and 3 W for a 70 V line.

100V

1.

5

3

6

X

X

16

T

A

P

SELECT

O

R

70V

0.

8

1.5

3

6

X

5

SPEAKER SYSTEM

VC8NB VC8NW VC6NB VC6NW VC4NB VC4NW

Owner’s Manual

EN

English

VEY4250

NOTICE

To avoid the possibility of malfunction/damage to 
the product or damage to other property, follow 
the notices below.

Handling and maintenance

• Do not expose the product to excessive dust or 

vibration, or extreme cold or heat, in order to 
prevent the possibility of panel disfiguration, 
unstable operation, or damage to the internal 
components.

• Be sure to observe the amplifier’s rated load 

impedance, particularly when connecting 
speakers in parallel at low impedance. 
Connecting an impedance load outside the 
amplifier's rated range can damage the 
amplifier.

• When using a high-impedance speaker 

connection, make sure the audio signal is 
passed through an 60 Hz or above high-pass 
filter before being input to the speakers.

• Do not touch the speaker driver unit, since it 

might cause malfunction.

• Do not place vinyl, plastic or rubber objects on 

the product, since this might cause alteration 
or discoloration of the panel.

• When cleaning the product, use a dry and soft 

cloth. Do not use paint thinners, solvents, 
cleaning fluids, or chemical-impregnated 
wiping cloths, since this might cause alteration 
or discoloration.

• Protection Circuit

This speaker system has an internal protection 
circuit that shuts off the speaker unit when an 
excessive input signal is applied. If the 
speaker unit emits no sound, reduce the 
volume level of the amplifier immediately. (The 
sound will return automatically in several 
seconds.)

• Do not place the speaker face down with the 

grille attached, as deformation of the grille may 
result.

• When placing the baffle face down, always 

place it on a flat surface.

Information

About this manual

• The illustrations as shown in this manual are for 

instructional purposes only.

• The company names and product names in 

this manual are the trademarks or registered 
trademarks of their respective companies.

About disposal

• This product contains recyclable components.

When disposing of this product, please 
contact the appropriate local authorities.

Yamaha cannot be held responsible for 
damage caused by improper use or 
modifications to the product.

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