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OWNERS MANUAL

Model 201/2 Model 202/2c Model 203/2 Model 204/2c Model 205/2 Model 206/2ds Model 207/2

Thank you for purchasing KEF Reference Series

loudspeakers. These have been designed to

faithfully reproduce high quality sound over many

years of use and should provide realistic

reproduction of music and speech. Please take a

little time to read these instructions prior to use.

Your KEF Reference Loudspeakers are tall,

slim and extremely heavy. Installed correctly on

a smooth, level surface, your loudspeakers

should be entirely safe to listen to and to

live with.

However, if you have small children, large pets,

the infirm, uneven flooring or unusually thick

carpeting in your home, then correct adjustment

of the foot assemblies is imperative, if safe,

stable operation is to be achieved.

Warning: The metal tweeter dome now has

protective mesh at the centre of the Uni-Q

driver array; if however this is compromised and

the dome itself is dented, it will permanently

impair performance.

1. Avoid temperature extremes.

2. Avoid damp.

3. Avoid direct sunlight.

4. Clean with the KEF cloth provided.

5. Do not use spirit based cleaners.

If you are at all uncertain about setting up, operating or caring for your system

your dealer will be pleased to assist you.

1. Read this manual carefully, especially the

safety information, before attempting to

assemble and operate the system.

2. Follow the unpacking and assembly

instructions on the cartons. Please note that

lifting the heavier Model 207/2 and Model

204/2c requires two able-bodied persons.

3. Never connect the system directly to the

electricity supply.

4. Trailing cables are dangerous. Ensure all

cables are secure and tidy.

5. When stripping cables use only tools

designed specifically for the purpose ie:

correct wire cutters or cable strippers.

Do not attempt to strip cables with a knife as

this could result in serious injury.

Important Safety Information

General Care of your System

Part No.: 290201E

Issue 2: January 2007

2 3

Important Safety Information 1

General Care of Your System 1

Contents 3

Introduction 5

Overview of Common Features 6

Model 207/2 7

Model 205/2 7

Model 203/2 7

Model 201/2 8

Model 206/2ds 8

Model 202/2c 8

Model 204/2c 8

Installation and Operation 9

Unpacking, Handling and Aftercare 9

Adjusting the Feet and/or Spikes 10

Loudspeaker Placement and Room Acoustics 11

Loudspeaker Positioning 12

Amplifier to Loudspeaker Connections 14

Amplifier Requirements and Power Handling 14

Uni Balance Adjustment Models 201/2, 203/2, 205/2, 207/2, 206/2ds 15

Placement Adjustment Models 202/2c, 204/2c 17

Single, Bi and Tri-wire Connections 18

Loudspeaker Cables 23

Grilles 23

Warranty 23

Service Information 23

Specifications 24

KEFHeritage 29

Wrong

Adjustment

Caution/Warning

Positive/RED

Negative/BLACK

Switch off appliance

Option

Correct

Contents

Since its formation in 1961, KEF has pioneered

many innovations in loudspeaker technology and

design. Your new Reference Series loudspeakers

contain one of the latest of these advances -

the KEF ‘Project Austin’ Uni-Q driver array.

In this innovative KEF design, not only are the

mid and high-frequency drivers on the same axis

(co-axial), but their acoustic centres are also on

the same plane (co-planar). The profile of the

mid-frequency driver’s cone modifies the

directivity factor (or ‘Q’) of the high frequency

unit such that both drive units have the same

directivity in the critical crossover region,

where they are operating at similar frequencies.

This unification of the ‘Q’ of the drive units lies

behind the name “Uni-Q”.

Now incorporated in many KEF loudspeakers,

the Uni-Q driver array yields immediate and

readily audible sonic benefits. With no sharp

discontinuity in ‘Q’ at the crossover frequency,

correct tonal balance is not confined to a

single ‘sweet spot’ in the listening room and

is extended to cover a far broader area.

With sound arriving in phase, the sound source

is brought into the sharpest possible focus.

With properly recorded material and as part of

a good quality system, well set-up, loudspeakers

with KEF Uni-Q can reveal the location of each

musical voice in the stereo image with pin-point

accuracy and with a much smoother response

being maintained off-axis - where most people

listen - than before.

The latest Uni-Q array implemented in this

range is a sophisticated device offering a

combination of wider bandwidth and wider

dispersion than its predecessor.

Both the midrange and high frequency drivers

have been symbiotically designed to take us one

step closer to the ideal of a controlled directivity

point source acoustic radiating system.

The 165mm (6.5in.) midrange section has a

shallow ‘Uni-Form’ cone profile which gives

excellent midrange performance but also

provides the optimum waveguide for the

coincidentally mounted tweeter.

This new two piece 25mm (1in.) titanium dome

tweeter has been developed utilising Finite

Elements Analysis techniques to provide

‘pistonic’ motion to a much higher frequency,

eliminating the need for a separate

hyper-tweeter.

It also features a vented pole piece,

increasing the air space behind the dome

providing an extended but smooth high

frequency performance whilst retaining ultra

wide bandwidth source compatibility:

DVD-A/SACD.

Introduction

6 7

Four drive units in a three-way configuration are

employed in the Model 205/2. The single Uni-Q

driver array for upper mid-range and high

frequencies with ultrasonic extension, and a pair

of 200mm (8in.) drive units in IDL configuration

for low frequencies. This system works optimally

in medium to large rooms where its controlled

and extended bass lays a strong foundation to

the superior imaging of the Uni-Q driver array.

Model 203/2 is a floorstanding three-way

loudspeaker with four drive units designed for

high quality reproduction in medium sized rooms

or where space is limited. Two 165mm (6.5in.)

drive units in IDL configuration handle bass

frequencies, the mid-range and high frequencies

are handled by the Uni-Q driver array

extending the response smoothly into the

ultrasonic region.

Model 205/2 Model 203/2

Model 207/2

The KEF Reference Series products covered by

this manual are loudspeakers designed primarily

to operate away from room boundaries

(free space), where the renowned stereo

imaging of the Uni-Q driver array is at its best.

However, a bass level adjustment is provided

(Uni Balance) on all Reference Series Models

which corrects the response to allow for

placement close to a wall.

In addition, all the models listed feature

a four step independent HF adjustment

(also accessed via the Uni Balance terminals) to

allow further tailoring to a particular acoustic

environment or to allow for the presentation

of accompanying electronics.

All models use Reference matched drive units

and crossovers that have been manufactured to

laboratory-standards and rigorously tested at

every stage of production. The driver

complement of each system reflects the

increasing performance capabilities of each

model, particularly its ability to reproduce wider

bandwidth at higher output levels.

Independent Driver Loading (IDL) is utilised for

the bass sections of this new Reference Range.

Using two identical bass units rather than a

single larger one has the advantage of

maintaining a slim profile for the cabinet and

subsequently wide and even sound dispersion.

Internally, however, a tall slim enclosure suffers

from strong top-to-bottom acoustic standing

waves which are very difficult to control.

IDL divides the enclosure into two half-height

enclosures, one for each bass driver, with much

improved internal acoustics.

Thanks to their internal Magnetic Shielding,

these loudspeakers may be used close-to or

beside a television set or video monitor,

when used in front left and right channel

positions in Home Theatre or Surround

Sound applications.

The centre loudspeakers also include a

bass adjustment for TV or wall mounting,

plus a high frequency boost facility for when

they need to be mounted behind an acoustically

transparent screen.

All models are timbre matched to each other so

combining different models in an AV system is no

problem. Extra Reference loudspeakers can be

added to your system with the knowledge

that the system tonal balance and integration will

be maintained.

Wide entry, gold-plated tri-wire/tri-amp

terminals are fitted to the custom-designed

moulded terminal assembly at the rear of the

loudspeaker cabinet. This allows the use of the

many different gauges of loudspeaker cable that

are available.

Overview of Common Features of KEF Reference

The flagship of the new KEF Reference

range, Model 207/2 is designed to faithfully

reproduce the full bandwidth and

dynamics of music signals. It is a no

compromise design where acoustic

performance is the prime objective.

A complex, fully fourth order, high-quality,

hand-soldered dividing network and five

drive units are utilised in the Model 207/2.

The dividing network has its cross-over

points at 120Hz, 400Hz and 2.3kHz

and smoothly directs appropriate

frequencies to the relevant drive units.

The new 165mm (6.5in.) Reference Series

Uni-Q driver array is used here for upper

mid, high and very high frequencies.

A 250mm (10in.) lower mid-range

unit fitted within its own individual

compartment and two 250mm (10in.)

fibre reinforced pulp-cone bass units,

mounted in IDL (Independent Driver

Loading) configuration, complete the

driver complement.

These Reference Series loudspeakers are

packed one loudspeaker per carton. Prior to

unpacking, please ensure that the serial numbers

of the loudspeakers supplied match each other.

Then, unpack the loudspeakers carefully

and inspect for any sign of damage.

Your loudspeakers left KEF in perfect condition.

If any damage is apparent, you should notify your

retailer or consultant immediately. Retain the

packaging in case a need arises for you to

transport the loudspeakers at a later date.

You will notice that a special KEF care-pack is

included with each pair of loudspeakers.

This pack contains a cleaning cloth and all the

required accessories for connecting and

positioning your loudspeakers. The care pack

also contains the unique product build

certificate. This is a valuable document and

guarantees the quality and craftsmanship of

your loudspeakers.

The cabinets are finished in real wood veneer

and should be treated with the same care with

which you would treat fine furniture. A suitable

cleaning cloth is included in the customer care

pack to maintain the original finish and lustre.

It is normal for the appearance of wood veneer

to change with the passing of time, but locations

in direct sunlight should, if possible, be avoided.

Furthermore the cabinets should not be allowed

to become wet.

Each Reference Series floorstanding loudspeaker

is supplied with KEF designed substantial spikes

and locking nuts (also in the care pack).

This enables fine adjustment of level, depending

on your preferred location of the loudspeakers

whatever the floor covering, carpet, tile or block

wood. In addition to the spikes and locking nuts

each Model 207/2 also comes with castors.

Unpacking, Handling and Aftercare

Installation and Operation

Model 202/2c Model 204/2c

Model 202/2c is a centre channel loudspeaker

designed primarily to match the Model 201/2

and Model 203/2 main loudspeakers and smaller

screens. It uses the same drive unit complement

as the Model 203/2 and, like the larger Model

204/2c is timbre matched to the other

Reference Series loudspeakers thereby allowing

a seamlessly integrated 3D soundstage to be set

up in the listening room. The size has been

chosen to allow it to be mounted more

conveniently underneath the screen within the

typical dimensions of a 32in. widescreen TV or

panel stand.

Models 202/2c and 204/2c have magnetically

shielded drive units and crossover networks

thus minimising any interference with CRT

type televisions.

Truly a statement centre channel loudspeaker,

the Model 204/2c fully exploits the dynamics

and bandwidth of modern AV soundtracks.

With around 70% of a typical soundtrack coming

from the centre channel it makes sense to

make this loudspeaker a truly capable one.

Four 165mm (6.5in.) LF units combine with

the 165mm (6.5in.) Uni-Q driver array in a three

way reflex system which, like the Model 202/2c,

not only has a bass level adjustment for

close to wall mounting but also a treble boost

facility for mounting behind an acoustically

transparent screen.

Four specialised rubber feet or bumpers are

firmly fixed to the base during production to

make sitting easier straight from the box.

In addition, dedicated stands are available for

the Model 202/2c and Model 204/2c centre

loudspeakers which allows them to be

securely mounted for optimum performance in

free space.

OWN

MAN

UAL

Mod

201

Model

202

Mod

el 203

Mod

el 204/

Mod

el 205/

Mod

206

/2d

Mod

207/

Model 201/2 Model 206/2ds

This is a three-way loudspeaker designed

primarily for high quality reproduction as a main

loudspeaker in small rooms or as a high quality

satellite loudspeaker in AV systems where space

is at a premium. Model 201/2 has three drive

units, two of which are combined in the single

165mm (6.5in.) Uni-Q driver array, with a

165mm (6.5in.) fibre reinforced pulp cone

bass unit mounted in a reflex enclosure,

completing the driver line up.

The Model 206/2ds is a dedicated dipole rear

surround loudspeaker for KEF Reference

multi-channel systems. Incorporating two

Reference Series Uni-Q driver arrays and an

additional 200mm (8in.) ultra low distortion bass

driver, the Model 206/2ds is perfectly timbre

matched with the other Reference Series

loudspeakers.

1110

Under normal circumstances your loudspeakers

will be commissioned by your retailer or

consultant, who will have been trained in their

installation by KEF.

KEF strongly recommend that you do

not attempt to level your loudspeakers

single-handed.

Recruit the assistance of another adult -

or consult an authorised KEF Reference outlet

for assistance which may be chargeable if the

purchase was not made through them originally.

The spike/locking nut combination supplied is

designed to provide small adjustments, not to

compensate for seriously irregular floors.

A spirit level is provided with certain models to

gauge when the loudspeaker is perfectly level.

A rigidly-sited loudspeaker performs better than

one that can move because it enables the cabinet

to remain fixed while the drive units are allowed

to move as determined by the source signal.

Best results will be obtained if the loudspeakers

are level and stable. Check the general stability

of each loudspeaker by gently rocking it from

side to side, front-to-back and diagonally.

Often, you will find that the loudspeaker is close

to vertical, but rocks because one spike (or two

spikes diagonally) seems too short.

If the general stability is good, but the

loudspeaker is leaning to left, right, backward or

forward, then equal minor adjustments to the

two spikes opposite to the direction of lean

should be made.

Adjusting the Feet and/or Spikes

* Only supplied with

Model 207/2

The listening room is one of the most variable

elements in the hi-fi chain and its effect cannot

be emphasised too strongly, nor can its effects be

reliably predicted. Spacing the loudspeakers

approximately 2m - 3m (6ft. - 10ft.) apart will

allow the stereo images to develop fully.

You should sit at a distance at least equal to and

preferably greater than the distance between

the loudspeakers.

Positioning the loudspeaker in a corner or near

to a side wall is not recommended as the

significant bass boost caused by this position will

affect the sound and cause the stereo image to

deteriorate. However, placement close to the

front wall is catered for in the Uni Balance

feature (see later). It is best to place the

loudspeakers symmetrically within the room,

relative to the walls, ceiling and floor,

where possible.

Be aware also that soft furnishings near to a

loudspeaker will deaden the sound - similarly,

nearby reflective surfaces may brighten up the

sound. Move the loudspeakers until you are

satisfied that the sound is right and that the

stereo image is well defined.

Like all other KEF Uni-Q loudspeakers,

your Reference Series loudspeakers are

designed to be used with little or no ‘toe-in’.

However if required a ‘brighter’, or ‘sharper’

sound may be obtained by pointing the

loudspeakers directly towards the listening

position or adjusting the HF output

(via Uni Balance).

Loudspeaker Placement and Room Acoustics

}

min.

1312

(6' 8")

Loudspeaker Positioning

14 15

All connections should be made with the

amplifier switched OFF. Ensure the integrity of all

connections prior to switching the amplifier ON.

KEF Reference Series loudspeakers are

fitted with purpose designed gold-plated

Tri-wire/Tri-amp terminals which will accept

bare wire, spade or 4mm connectors.

Most good quality loudspeaker cables have some

indication, such as colour coding or ‘ribbing’

on the insulating material, indicating which

conductor is ‘+’ or positive. Connection to the

loudspeakers can then be made as follows:

The left channel amplifier output terminal

marked ‘+’ or coloured RED connects to the left

loudspeaker terminal marked ‘+’. The left

channel amplifier output terminal marked ‘-’ or

coloured BLACK connects to the left

loudspeaker terminal marked ‘-’. Similarly,

these instructions should be followed for

making connections between the right channel

amplifier output and the right loudspeaker.

Correct polarity, or phase, is vital to the proper

operation of the system.

If the connections are not made correctly the

sound will deteriorate giving poor bass output

and a diffuse presentation of the soundstage.

Bare wire connections are the simplest to

achieve and involve stripping 12.5mm (1.2in.) of

insulation to expose the loudspeaker wire core.

(You should twist together, using clean fingers,

the ends of each multi-stranded core prior to

the next stage to ensure a good signal contact).

Having unscrewed the lower terminal cap,

push the wire through the exposed hole in the

terminal body and screw the cap down tightly.

Make sure that no stray strands come into

contact with the opposite terminal; this could

cause a short circuit between the terminals and

may damage your amplifier.

Be aware that a higher quality run of cable will

always give a more rewarding presentation than

multiple runs of an inferior cable.

Amplifier to Loudspeaker Connections

Models 201/2, 203/2, 205/2, 207/2 and 206/2ds

incorporate separate adjustments for bass and

treble output situated at the top of the terminal

panel (see below). The left hand terminal

allows a two position bass level adjustment

while the centre and right hand terminals

allow a four position tweeter level setting.

Three gold plated screw caps are supplied with

each loudspeaker, one for the LF and two for the

HF adjustment.

LF Adjustment

With the supplied cap screwed into the

‘LF Adjust’ terminal the bass level is set at the

‘flat’ setting - for free space positioning. When a

loudspeaker is positioned close to a wall

the perceived bass level is increased by

approximately 2dB.

If the cap is removed from the LF Adjust

terminal the bass level is reduced to correct

the loudspeaker response for the proximity of

the wall.

Uni Balance Adjustment

2. Cut

cap out

1. Flat

cap in

Level (dB)

Frequency

300 Hz150 Hz50 Hz

-2.0

0.0

Mode

level (dB)

1. cap in 0.0

2. cap out -2.0

In KEF literature and in the specification

table within these instructions are listed

a range of amplifier power outputs to match

your Reference Series loudspeakers.

Conditions of use (room size, type of

programme, preferred listening level) and the

nature of the loudspeaker/amplifier interface

vary so widely that it is not possible to lay down

hard and fast rules about amplifiers and the

loudspeakers they drive.

KEF loudspeakers are built to rigorous standards

of quality and consistency and the upper limits of

the amplifier requirements shown are those

which the loudspeaker in question should handle

without distress or damage when used under

normal domestic conditions.

If higher than specified amplifier powers are

used, great care should be taken to avoid

abnormal conditions such as switch-on surges or

gross distortion, either of the amplifier or the

loudspeaker, resulting in power peaks greatly in

excess of the ratings specified. Care should be

taken as the possibility still exists under certain

conditions (such as excessive bass or treble

boost caused by tone and/or loudness controls,

graphic equalisers, etc.) that the loudspeakers

can be overloaded and damaged. The lower

limits of amplifier power are those necessary to

give a reasonable sound pressure level under

domestic conditions.

Remember it is easier to damage the

loudspeaker by using a small amplifier driven into

distortion by too much volume, possibly with

bass and treble boost, than by using a larger

amplifier which has power in reserve.

If in doubt, ask the advice of your retailer

or consultant.

Amplifier Requirements and Power Handling

Models 201/2, 203/2, 205/2, 207/2 and 206/2ds

1716

HF Adjustment

The ‘HF Adjust’ A and B terminals control the

high frequency output of the loudspeaker.

This facility allows the user to adjust the

‘brightness’ of the loudspeaker to suit listening

room acoustics, partnering electronics and

personal taste.

Four settings for tweeter output level are

possible +0.75, 0 (‘flat’), -0.75 and -1.5dB.For a

‘brighter’ or ‘sharper’ sound select +0.75, to

remove brightness select -0.75 or -1.5dB.

The adjustment is made by screwing one,

both or neither of the gold plated screw caps

into the HF Adjust ‘A’ and ‘B’ terminals,

according to the table below. The default setting

is 0 (‘flat’) - one screw cap in terminal ‘B’.

These adjustments as mentioned earlier are

provided not only for ‘room tuning’ but

to allow a more sympathetic partnering to

some electronics.

Amplifiers that may have either a very forward

or bright presentation can be tamed or equally

those that have quite a warm presentation can

be given extra sparkle, it is your choice.

Mode

level (dB)

Cap

A B

in +0.75

out

in 0.00

3. in out -0.75

4. out out -1.50

Level (dB)

Frequency

2 kHz

+0.75

0.00

-0.75

1.50

The two centre channel loudspeakers,

Models 202/2c and 204/2c, incorporate a two

position ‘Free Space/Television’ Uni Balance that

adjusts the bass level depending on whether the

loudspeaker is mounted freestanding or close to

a TV or wall boundary. In the Model 202/2c the

‘television’ setting corrects the bass response

for when the loudspeaker is placed on top of,

or directly underneath, a TV. In the Model

204/2c the ‘television’ setting corrects the bass

response for when the loudspeaker is placed on

a stand close to a wall.

HF Adjustment Models 202/2c

and 204/2c

The two centre loudspeakers Models 202/2c

and 204/2c incorporate a two position high

frequency level adjustment which allows

compensation for the sound attenuation when

the loudspeaker is positioned behind a typical

acoustically transparent projection screen,

see below. Select ‘Screen’ when the loudspeaker

is positioned behind a screen.

Placement Adjustment Models 202/2c and 204/2c

NORMAL SCREEN

FREE SPACE TELEVISION

H.F.

ADJUST

L.F.

ADJUST

300 Hz

Level (dB)

Frequency

NORM

SCR

EEN

FRE

E SPAC E

TELEVIS

ION

H.F

ADJUST

L.F

ADJUST

NORM

SCR

EEN

FRE

E SPAC E

TEL

EVISION

H.F

ADJUST

L.F

ADJUST

Mode

level (dB)

0.0

-3.0

300 Hz

Level (dB)

Frequency

Mode

level (dB)

0.0

-2.0

300 Hz

Level (dB)

Frequency

150 Hz50 Hz

Mode

level (dB)

+0.75

0.00

NORMAL SCREEN

FREE SPACE TELEVISION

H.F.

ADJUST

L.F.

ADJUST

0.00

+0.75

2 kHz

Level (dB)

Frequency

20 kHz

NORM

SCR

EEN

FRE

E SPAC E

TEL

EVISIO

H.F

ADJUST

L.F

ADJUST

SCR

EEN

TELEVISION

H.F

ADJUST

L.F

ADJUST

Mode

level (dB)

LF Adjustment

Tri-wiring/Tri-amping Terminals

The three sets of input terminals are linked by a

high quality shorting cable. Removal of this cable

will allow the LF, MF and HF sections to be

connected separately, either by a parallel

connection from one amplifier (known as

tri-wiring) or to separate power amplifiers

driven from the same pre-amplifier

(tri-amping). Further adjustment of this cable

will allow connection of just two (pairs of)

adjacent terminals together for Bi-wiring

and Bi-amping.

Attaching Shorting Links

1918

Loudspeaker single wire connections

Loudspeaker bi-wire connections

Loudspeaker tri-wire connections

Single, Bi and Tri-wire Connections

2120

Centre loudspeaker single wire connections

Centre loudspeaker bi-wire connections

Centre loudspeaker tri-wire connections

Loudspeaker bi-amplification connections

Loudspeaker tri-amplification connections

Loudspeaker single amplification connections

KEF Reference 203-2 Handleiding

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