Kef Chorale III Brochure

Page 1

A new dimension .
in highf delity.

Th_e KEF
Phllosophy

Snecuulrsnhon has been me key In 1hr: s.cccus nl lhe
KEF loudspeaker angular lhcv have pnneerec marry
aspecls ol laudspenker doslgn \vhrch have SHCE bee"
armored lmougnou! i716 Industry

Thrxse VC'udL

compasrle drapnragms m melul a'd plasllc

com pule' desgnm mud-'19 'reiwnrks

me applcalio'r ol mgual meauure'ne'll lech'lIQues
cinclm'uc overload protect-m

compulensed prod.cl-o'. carhol

Now lor lhe M51 mm mm me KEF Referrce Ser'esvrl
may 00 c'ai'nedwrm cowlde-lce Ihal lne sla-rdard ol
pedormance ach mm by in? speaker Syslu' cesrrer
rs realized In lull for each and every purchaser. and is no!
lusr confined lo Inn spatially [Jreoa'ed models lrwuenlrv
used we demoflslralron a"d Dress rev arr-s.

The acvm ced malhemaircal wficepls a'fid compule'
Iccnnoiogy wh:ch makes the D'DJUCIID'i oi KEF
Relevance 501 or. possmlowcrv mrgrlaly p-meered by
KEF as a research project slancu m l97l lls
subsequent velmemmr rd applicallm ball-r to produc!
dmnlopmenl and producllon. mlh lhe assocraled
masswu vwcslmml l" campulers measuring and
D'Dduclron lacrllr 05 IS evidence ol KEFs cmermmaum
to produce :rulv accuale. callbialefl domosllc
laudspeakms r1 c0'thnuous Droduclo'l ("lua'illlICS

Based on nccurnm mcawremenls rd 3 llm-ooghrless
0' D'OdUCllO'T co'lwl much was lormerly possiue onlv In
laboralorv mndrtlors Ihesr: rrmmalwc lechfiqucs
combrne In acme vlng a sla'tdam oi pedorma'fcn lo
snwsly me most Siringml rmu rprrrsr-Js imposed lnr
p'o'esslmal monrlormg purposes In pan cularr lno
anally Io produm qudspcakers l"- palm mm are closely
malc had lm sensmwly and lreque'rcy ruspolso ms.ri?s
"0| unry consalml Imal balance. but also remarkanly
sharp and lulelvke slereo magi-r9 wan uppronnalley
rc-cnrdon programme malarial

Smce {no me KEF slaned maqulaclurmg loud
speakers «1 196: I'm accousllc omefils 01 n5 producls
have always been demonslraole l'trllally. KEFs use cl
advanced mammals lm rue conglruclrm nl drum mil
draphragms allcrwm lhe creation (:1 producls capable 0|
broader banawudlnr grealer clarity arr-1 improved
c0srslency Ina-1 was DOSSIDIE wllh cowenlro'ral
malorlnls.

Now ai any miumn lerE-l - up in cancer! nalv aynamrcs
- the REF Relevmco Senes ollcrs unsurpassed realism
accurale :onal balance and sle'eo perspectwn (war a
WIGB area Even when usmg hlqh pow-3r umplvlnc-vs
capabln oi Gal-vermg inn full aynnmrc range cap1urod Dy
modem rocoramg lenmqunu . lrre systems are pmlecled
Imm damage by a unique scllrpowmm proleclron
devlce lS-STOPl which ensures lhai accrdenlzrl overload
carol damage v-lal connme'fls 01 dISlurD system
calnnrnlrnn

Chorale III

Chorale ||| rs a very compact lwoway loudspeaker ol
medium elllcrency lls excepnonally sma I me makes
ii an ideal chance lor bookshell Inslallalrons and Il rs
easily accommodaled even when space is very
reslrlcled lls desngn rs so well opmmsea mm It oux-
parlnrrns loudspeakers lwo or Ihree lmes larger The
cabinet 15 lunrshed in Srrrulaled walnul veneer wilh a
brown Iexlile gulla

Specification: Si3022

anuoncy 79H71020kHz: 30831

tango: 2m on relevance axis l-'- 0118
al 50H: and JOkHzl

Maximum 105GB spl or. programma

output: peaks under typical
"slen'ng condrrons

Characteristic 86:18 5p: 31 lm on

unlilivity relerence axis for punk

luv-l: noise inuulol iW

Profit-mm.

ruling: 60W

Nominal

finned-net: 8 ohms

Wniglm 4 7kg

Dimcnlionn: 370ml - 220 (w) > :60mm ((1)

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Coda III

Coda lIl rs a two-way compact system 01 medium
cfilcrcncy whtch oroducts amazrng sound qualrty lrom
such a small enclosure. It Is casrly accommodated in
smaller homes and canine used on sholws or stands
Coda lll rncoroorzrres Important new technical
features wrlh a olaasrng tront ballle colour scheme to
sull contomoorary trends rn domestic decor

Cantor Ill

Cantor HI ls a compact lwo»way loudspeaker

ol mcdlum clltcloncy lulled wrlh a passlvc bass
radralor which maintains low lrcquoncy response
well below 60 Hz.lls aslonrshlng sound oualtly and
general perlormance are equalleo only by
expensive systems more than tour trmes larger. The
cabtnel ls lrnished rn simulated walnut w:lh a brown

Spoomootion: SPGOt 6

Frequency 60Hz to ZOkHzl: 368 at

nngo: 2m on reference was (-1 (MB
at 50H: and 30kH2)

lnlmum l07dB Spl on programme

output: peaks under tymcal
Irslenlng condmons

Char-notorious 87dB sol at lm on

sonnllivity rolerence axis for prnk

loo-l: noise rnput or lW

Programm-

ntlng: 100W

Nominal

impodlnoo: 8 ohms

Weight: 656kg

Dimorulono: 470 (h) x 280 (w) x 212mm(d)

lexlilc gnllc

Specification: SP3029

Froquonoy 58Hz to ZOKHzt 368 at

rongo: 2m on relerence axis (-1 UdB
al 43Hz and SORHzl

Hula-um 107GB spl on programme

output: peaks under tyorcal
llstonrng condrttons

Char-chunk: 87dB sol at lm on

oomltivity relerence axis lor ornk

lovol: n0rse rnoul ol 1W

Programm

tiling: 100w

Nomlnul

lmpodonoo: 8 ohms

Wolgm: 6 8kg

Dlmomlono: 502 lh) v. 247 lw) x 212mm ((1)

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ULS 40

Universal
Loudspeaker
Stand

All éompact loudspeakers glve better sound duality
when placed at the correct height an appropriately
daigned stands. Reproduction is more natural. stereo
Images are better defined and Visual appearance is
also improved The ULS-ltl stand is suitable lor use
with most loudspeakers at up to 40 litres internal

votume it is superbly linished in black or dark brown,

The large Circular bass ensures stability on all types
ol lloormg,

Drive Units

KEF have specialised In the design and
manulaclure ol hlgh quality drive units SlnCe l96t
These are all speclal types including corrioosite
diaphragms "1 metal and plastic lar smooth
lrequenCy response and very low colouration. The
loilowlng is a selection from many types available.
Design leaflets are available lrorn home constructors

M 393 SPIOM

K E F's lamous Ital diaphragm waoter is still
unsurpassed alter more than twenty years in
production.

Frequency range 20- '000 Hz
Programme rallng too W
Nominal impedance 8 ohms
Technical data aheel PL3¢9 {NO 1

3200 SP1 01 4

An 8 inch dlameter Bextrene cone driver wrm long
throw voice coil assembly and rubber swound
suitable lor use In totally enclosed boxes

Frequency range 25-3500 Hz
Programme rating 50 W
Nominal Impedance 8 ohms
Technloeldm eheel FLSH END 1

Bi 1 0A SPIOOS

The ltrst Benrene cone driver in producuon Since
t966 and spec-[led in countless OEM products.
tncorpmaled in the lamous Lsa/SA. BBC monitoring
loudspeaker,

Frequency range 55-3500 Hz
Programme rating 80 W
Nominal Impedance 8 ohms
Technloel data sheet H.345 END 1
121A 8P1:

Mylar domed high-trequency radiator glvlng
smooth. extended treble reproducllon. Also
specllied lor BBC LSB/Sa and wrdely used
elsewhere.

Frequency range moo-40.000 Hz
Programme rallng IOOW
Nomlnal Impedance 8 ohms
technical data aheel PL342 END 1

Individual technical data sheets. application notes
and KEFTOPICS are availaale tree on rednesi

Delailed technical emanation ol the development and
design ol KEF Relevance Series loudspeakers is given
in

AIS Paper' the Apptlcation ol nlgiml TECl'l'HQUES
lo the Measurement al Loudspeakers
ay J M Berman and L Fl Fincham

KIFYOPICS Maintaining Quality Standards "1

Vol. 3 No a Production

KEFTDPICI High Elllclency wtlh Small

Vol. 3 No.6 Enclosures?

KEF'I'OFIOS Overload Protection

Vol. e No.1

KEFTOPICS Crossover Filters

Vol. 4 lo 2

winner at Audio Engineering Some 5 Pwltcallol'l
Agéd Igrarlhe Outstanding Paper lort clwo your period
1 -l