Bedienungsanleitung KEF Reference 201-2 (Seite 4 von 19) (Englisch)

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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.

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KEF Reference 201-2 Seite 4

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