Bedienungsanleitung KEF Reference 204-2 (Seite 8 von 19) (Englisch)

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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

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KEF Reference 204-2 Seite 8

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