Kef Model 109 Owners Manual

Page 12

liii-Lnencr SERIES MUDLL 109 'liirs Mniusrou:

CABLES

To maxlmln .he periorinance ufTlie Maiilslnne sysieoi you should ensure ihar thr
anhlss used irern amplinsr ro loudspeaker are olgaod quallly ll is irnpoiianl ihai the
total rcaisiancc oirhe sahle should no. ereeed o 2 Ohms Always .ry tu keep tlle oahle
run in die loudspeakers as shorl as possihle m mlnlmi79 power and high frtqucncy losses
The fullewiug iahle shows .hc maximum lengdi «has can he used in .aiious gauges
wiihaui significant erred on lhe frequmcy response of rho loudipeaker. Ensure iha. all
nonnariions are good, olean and none. It is good praeiiee to oocosionally reinake all
conneeuons in do me orhne win: .enninarions ml hack «he .nsuliuon in expose fresh

condumor.

wire iype/orea nini2 Rcaistancc per moire (s2) Lengih for 9.2 ohms ( )

0.75 0.046 4,3
1.0 0.034 5.8
1.25 0.027 7.2
l .5 41023 6.7
2 .5 0.014 145
4 0 0.008 23.3
6.0 0,006 35.1
10.0 0.003 58.8
AWG

[8 0.042 4.7
16 0.026 7,6
14 0.016 l2 l
12 0.010 192
10 0.006 308
8 0.004 48.8

FAULT FlNuING

Loudspeakers are inherenily reliable and mly give irouhls. It is sniper-rain to
.e...e...l.er ihai ranks arising in any psri oldie reproducing sysmnl will he heard yia die
loudspeakers and rhercl'oro, when raulrs occur, careful and analytical diagnosis will hc
required to loeste lire ariual source of trouble. Loudspeakers cannm generals hiss oi-
hum Spurious nmSCS ofilus iype generally originale ln lire eleitmuici sections oi ilie
equipmeui or even in the programme source itsell. i-nulis in a loudspeaker will lie
andihle on all piognrnrne sourres. in die unlikely rieni llni a problem arises iriih yilur
syslena rho lhllnwlng fault finding guide will glvl guidauei- l ileicrmining ihc source of
the erouhle. ir you l.el.e.e doors en he a raid. in your sysierr. alnays rhede .he

wmichions first.

laser T\VLNI"x

RErLllLNLL Srkirs Monri

l0? THE Mklusiunh

PROBLEM

POSSIBLE CAUSES

ACTION

Neilher loudspeaker or channel

appears to lie working

(i) on amplifier or source Componmt fault
(li) .i Inuli in both loudspeakers
(iii) a fault in bodi speaker cables

This can only be diceked by mplaclng
comPonents in die sysierr. ror knuwn
norking paris. For example. replace die
loudspeakers {or know. workmg
loudspeakers. 1i rhere is sull no sound
iron. eid.er loudspeaker rhcn «he
amplifier, source Compancnl or rahles

are lanky.

Only one loudspeaker or channel
appears to be working
(for example: only the len channel

appears ta be working)

(i) right channel oi lhe anipliner is ianlry
(in right loudspeaker is ianliy (iii) the
right cablc(s) is lanky

Switch d1: speaker cablcs". lfdiere is slill
no sound lrom the rigid loudspeaker than
do loudspeaker is lanky. ii dic right
lmldspmkcr is now working lrul ilie lrl'l
loudspeaker is no! llieri the fault is in the

right aroplilier (haiinel or me ii

spade. ialile

Ono ur mun~ ofthl- drive units do

not appear in he working

(i) ilne releianr sclTle in ihc loudspeaker
is faulty

(ii) ihe lrilerumnecling cahle {or diae
session is faulty

(iii) doe Main inpui shoriing mils are nor

conrieeling properly

(i) Ensure ll... il.e diori g nails are
properly canncctcd.

(ii) replace die interconnecting oehle to.-
die rauliy seoiiiin. lrdie prohlero still
eiosis dien rhc loudspeaker secuon is
reulry, ii'ihe prohlem disippeais rhen die

inlrl'ir)nnc(ting sable was iaulry.

A disioried sound is eoining from

bed. loudspeakers

(i) an amplifier or source eoniponeoe lauli
(ii) a [dull in hoil. loudspeaker i

(iii) a raid. in lmdi speaker cahles

This e... only hr ilirekeil liy lcplilcing
Lornpollcnts in rhc sysienr for kooy...
working peris ror example; replace die
loudspeakers For known working
loudspeakers. lftllcm is siill a disiorieil
sound rro... hoil. loudspeaker then .hc
amphner, source onmponenr or rabies

are raulry

A distorted or intermittent sound
appears- tube coming rroiu one
loudspeaker or channel

(for example: distorted sound from

the right channel)

i.) right ehanncl oi the nnplilier is lauliy
(ii) right loudspeaker is inuliy

(ill) ilie right Cal-dds) is laulty

Swim. ihe speaker Lables*. ll then: is sn'll
a disturtcd sound lroiri the riglu
lnuclspealiei then the llludspeaktl is faulty.
lr ilie righr loudspeaker is now working
properly but the distnrlerl sound is now
coming fimn ilie lei} liiuilspmker then [lie
iaulr is in dis righl ampliiicr channcl or

die right speaker rahle,

*Switcl: Cables: conned the lek spcalm- calil: to the right loudspezlsei
and die ugh! speaker able to ihe lel'i loudspeaker.

Par... kalill one