(rÍfl ïlt I iltÍï0Rï0lïilr 11 0rCommunicat ion Systems were in operat ion wor ld-wide,including many prest ig ious locat ions such as the House ofCommons in London and the United Nat ions bui ld ing in NewYork. A decade later Tannoy was established as theundisputed leader in Studio Monitor design. Thanks to thepoint source pr inciple of the Dual Concentr ics, h i - f i l is tenerswere also benefit ing from Tannoy research achievement inadapt ing professional engineer ing developments Íordomest ic use. The Í inal endorsement of Tannoy's cr i t ical

Tannoy - A type oÍ loudspeaker systemAlways an enterprising man, Guy Fountain in 1926 perfecteda rect i Í ier which was simple and rel iable enough for thehome charging oÍ radio batteries. His rectif iers used twometals - Tantalum and a lead al loy - hence Tannoy. Not longafter the first Tannoy factory was established in 1929, hebegan exper iments wi th moving coi l loudspeakers using DCenergised magnets. Ear ly in 1930 the company won acontract to supply the Bertram Mi l ls Circus wi th a soundreinforcement system. The company never looked back.

The undisputed leader in audio communicationsSince their beginning Tannoy speaker systems have stayedfront runners in every area of sound and communicat ions.By the end of World War l l , which created tremendousgrowth in the need for ef Í ic ient communicat ions, Tannoy

RIAI (lBilt tïA yital component to uncolouÍed soundAs the bass cone-piston moves within its excursion path,i t not only produces sound in Í ront of i t , but sound behindwithin the loudspeaker cabinet. l Í the wavelength (or amult ip le oÍ i t ) oÍ the paft icular note being reproduced isequal , Íor instance, to the internal width of the paral le l s idesoÍthe cabinet, then a standing wave is set up in the airspace, Íalsely exaggerating the note and giving thatcharacteristically 'boomy' sound. Adjacent walls in theTannoy SIXES cabinets Íorm an angle of 120" rather than themore convent ional 90' . This, together wi ththe reduced number of paral le l areas in thecabinets, greatly reduces the potential forthe generation of standing waves inside theSIXES cabinets.

A design that conveys the musicThe cabinet structure has been speciallydesigned to reduce difÍraction effects to aminimum. Di t Í ract ion oÍ a sound waveoccurs wherever that sound wave reachesa boundary, such as a cabinet edge. Theboundarv then behaves as a secondary

sound source in i ts own r ight . The size oÍ th is source isgreatly dependent on the severity oÍ this boundary. Theedges of the cabinet on the SIXES models are much lesssevere than those oÍ a convent ional ly shaped loudspeakercabinet resul t ing in much smal ler secondary sources. Thesedi f f ract ions cause anomal ies in the Í requency response oÍthe loudspeaker and reduce i ts abi l i ty to produce abel ievable stereo image. 0n l is tening to the SIXES theconsiderable reduction oÍ these diffraction effects wil lbecome immediately apparent by the posi t ively tact i le nature

of the imaging and uni form frequencyresp0nse.

A cabinet that respects the entireaudio spectrumAs we have already observed, bass unitsinject vibrational energy oÍ varyingÍrequencies into the cabinet structure asthey operate. The panels which are theloudspeaker wal ls al l have their ownparticular resonant Írequency and can beexcited into resonating by this energy at theappropriate frequency. This we hear as

DIÍIGII

combination oÍ acoustic design and visual styling is thatDual Concentric speakers have now won Japan'sprestigious 'Golden Sound'Award three times since itsinception in 1979.

Success and acclaimTannoy's Dual Concentrics, developed as an acoustic designprinciple in the thirties and stil l unequalled in point sourceperformance, now share the limelight with the TannoyDiscrete loudspeakers first developed in the early 1980's.The immediate success oÍ the Mercury with both hi-Íi criticsand discerning buyers led to the development oÍ the PlanetSeries and was to feature in Hi-Fi Choice Awards ÍorLoudspeakers Íor no less than four consecutive years in themid '80's. Concurrent refinement in production methods tothe point where it was possible to manufacture DualConcentrics with no loss of component or assembly qualityfor a parallel cost to Discrete systems, allowed us to add theacclaimed DC100 and DC200 models to the range. Finally inthe late 1980's, the Tannoy Series 90 speakers provided uswith a unique range of highly regarded Dual Concentric andDiscrete systems, again winning many awards in respectedhi{i journals around the world.

QualiU anddesignIt takes a wide range ofengineering skills to produceloudspeaker that is bothacoustically satisfying andattractively styled. To producethe Tannoy SIXES, everyacoustic, design andmanuÍacturing engineer withinTannoy contributed his or herparticular strengths, workingtogether to produce an innovativeand challenging new loudspeaker range. From initial desig6ï,.acoustic tests and Íine, tuning through to rigorous qualitgcontrol in manuÍacturing, every Tannoy SIXES loudspealcóldisplays - sonically and aesthetically - the capability ofthe hi{i industry's most experienced engineering team.Indeed the Tannoy combination oÍ design, performanceand quality oÍ construction has secured for us hard wonapproval by H.M. Government as a supplier meeting thestringent AQAP-4 standard.

colouration. A Tannoy SIXES cabinet has Íour diÍÍerent sizesoÍ panels and since there are six walls in total each panel issmaller than a conventional loudspeaker's. Smdl panels tendto have a higher resonant Írequency than large panels. Thesesmaller sizes ensure that the panels are out oÍ reach of theworst oÍ the low Írequency energy coming from the bass unit.Any resonance which does occur in the panels will be atdiÍferent Írequencies, so any colouration which might occur isminimised by being spread over a broad-band of Írequencies.

The Structule, no longer'Justanother bor'The basic cabinet structure is Íormed Írom a'wrap'vertically folded around upon itselÍ toÍorm an unequal sided hexagon. This is then'capped'top and bottom with mineralÍil ledpolyoleÍinic crowns and bases and pulled intoa rigid structure by the use of a vertical braceto which the crowns and bases are attached.Great care has been taken to minimisediffraction possibilities in all areas oÍ thedesign. This is particularly noticeable not justin the cabinet shape itselÍ, but in the way that

the drive unit chassis blend into the Íront baffle. The grille toois designed to stand slightly off the baffle, and has a veryopen slender frame, which attaches to the Íront baffle viaflush Íitting mounting clips.

Growns and BasesThe elegant crowns and bases that you see on Tannoyloudspeakers are precision injection moulded from a mineralÍilled polyoleÍinic to provide good stiffness and dampingproperties. The internal surfaces oÍ these crowns are proÍiled

to reduce standing waves and have roundedoutside edges to minimise diffraction effects.The top is inlaid with a stylish laminate andthe base threaded so that it can be bolted toTannoy's purpose built range oÍ stands orcan accept down-spikes to ensure maximumstability. A central brace runs internally downthe height of the cabinets to which thecrowns and bases are bolted and bonded,pulling the cabinet into an extremely rigidstructure.

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This elegant Í loor standing closed box loudspeaker systemhas been designed to produce an accurate, t ight, Íast and

extended bass response by the use oÍ one 6.5' Dual

Concentr ic, supplemented by a 6.5 ' Bass uni t dr iven below

400H2 and a 6.5 ' Mass Tuned Passive Cone. The DualConcentric contains Tannoy's new tweeter and 'tulip'

waveguide for extended high Írequency response. These

units which are mounted and braced to Tannoy's new

cabinet structure, are Íed Írom a Hard-Wired minimalistcross-over network using only the Íinest components.

The 615 heads the SIXES loudspeakers. The highperformance, low ditfraction, low colouration that isprovided by the cabinet design is exploited to the bestadvantage by the use oÍ the 8' Dual Concentric drive unitwi th i ts moulded cone and i ts 30kHz' tu l ip ' waveguidetweeter. This unit is augmented by an 8" Bass unit and an 8"

Mass Tuned Passive Cone. The loudspeaker can be coupled

to the floor with the supplied spikes and the base mass-loaded to ensure that the exceptional dynamic qualit ies of

the system are not masked by any instabil ity.

A Single Point Sound SourceThe drive unit that can reproduce accurately the entire audiosignal does not exist. Multiple drive unit designs are adopted asa compromise. The problem here is that the treble and bassportions oÍ a signal (a saxophone Íor instance)' are re-produced Írom ditÍerent places. The benefit of the highÍrequency driver sharing the same chassis as the bass driverare that the whole audio range is perceived as coming Írom thesame point in space - l ike the ideal drrve unit, producing almosttactile stereo images oÍ tremendous stability.

Tannoy's'ïulip' WaueguideThe H.F. unit used at the heart oÍ the Dual Concentric drive unitis broadly similar to the 30kHz versibn used in the discretemodels, but in this instance uses an acoustic waveguide toÍorm a perÍectly spherical wave at the throat oÍ the bass unit.The Ílare oÍ the bass cone-piston isoptimised to continue this waveunhindered, ensuring a smooth andextended high-Írequency responsewell integrated with the bass/midoutput oÍ the bass unit.

Moulded Gone.Piston fechnologYControl oÍ the thickness oÍ thepolyoleÍin co-polymer sheet (theideal cone material) which isvacuum Íormed to make the cone,is ditÍicult to maintain. HoweverTannoy, as one oÍ the largestloudspeaker manuÍacturers in theUK has invested substantiallY, inresearch and tooling to makeinject ion moulded loudspeaker cone-pistons a real i ty. The

SIXES cones are inlect ion moulded Írom a mineral Í i l ledpolyoleÍ in co-polymer which al lows us to vary the thickness(and consequent st i Í Íness) in diÍ Íerent areas oÍ the cone-piston.For example i t al lows us to make the neck oÍ the cone-pistonmore r igid. This is where the cone is driven by the voice coi l

and maximum rigiditY is required.

Bi-Widng fechnologYAll the SIXES have a Íaci l i ty Íor Bi-Wiring where two pairs oÍloudspeaker cables are required. One pair connects thetweeters to the ampliÍier, the other connects the bass units to

the ampli Í ier. Spl i t t ing the treble and bass signals al lowsindividual instruments to be better identi Í ied, part icularly

noticeable in complex passages oÍ music where the tune played

by an individual instrument becomes easier to Íol low within the

mass oÍ sound.

DiÍÍerential Material ÏechnologyThe results oÍ Tannoy s study oÍ diÍ Íerent materials and their

relattve behaviour when in ultrmate contact (DMT) were Í irst

seen in Tannoy's Series 90 loudspeakers and was morerecently developed Íurther Íor the Tannoy studio monitors.

DMT wil l not be immediately visual ly apparent, but you wil l

notice i ts many audible beneÍi ts. In al l areas oÍ theloudspeaker, wherever you see dif Íerent materials in int imate

contact or a "glue" ioint, you can be sure that we have

careÍul ly considered the sonic efÍects oÍ the complexrelat ionships between these materials.

This f loor standing compact loudspeaker uses the8' Dual Concentr ic dr ive uni t in a c losed box system' High

sensitivity bass extension is ensured by the use oÍ a

secondary 8 ' Bass uni t , dr iven below 400H2. Floor coupl ing

spikes are suppl ied Íor opt imum bass and mid-band clar i tyand al low the 611 to be t i l ted to obtain the best l is teningposition Íor different seating heights. Tannoy's advancedcabinet design provides bracing of the dr ive uni ts for a

colourat ion Í ree sound.

This 8' Dual Concentr ic consists of a moulded cone-pistonbass unit for minimum cone break up and maximumperceived bass 'speed'together with the new 30kHz, 25mmaluminium high Írequency tweeter and 'tulip' waveguide.The Dual Concentr ic drive unit is mounted within, and crossbraced to, Tannoy's new cabinet structure providing accuratepinpoint location oÍ sound within the stereo sound Íield.

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Advanced cabinet slructure

Cross braced driver/cabinet design.

Hard-Wired, h igh qual i ty min imal is tcross-over networkErgonomica l ly des igned, B i -Wiredtermina l panel , w i th go ldolated terminals6 5 Dual Concent r ic DMT dr ive un i l

6 .5 Bass un i t . dr iven be low 400H2

6.5" Mass ïuned Pass ive Cone.

Smooth H.F. Í rom ' tu l ip ' waveguideand 30kHz tweeter

Advanced cabinet structure

Cross braced driver/cabinet design.

Hard-Wired. h igh qual i ty min imal is tcross-over network

Ergonomica l ly des igned, B i -Wiredtermina l panel . w i th go ldp la ted termina ls

Sing le po in t source

Vented bass driver chassis reducesthermal dynamic compression

C*High sensit ivi ty 1

High qual i ty Van den Hul in terna lwrnng

Faci l i ty Íor mass-loading base

Floor standing design withcoupl ing sp ikes

Black ash or walnut Í in ish

5 year warranty

8 Dual Concent r ic DMT dr ive un i t

Smooth H.F Í rom ' tu l ip 'waveguide

and 30kHz tweeterHigh qual i ty Van den Hul in terna lw rnngProvrsion Íor down sorkes orbolt ing to standBlack ash or walnut Í in ish

5 year warranty

Advanced cabinet structure

Cross braced driver/cabinet design.

Hard-Wired, h igh qual i ty min imal is tcross-over networkErgonomica l ly des igned, B i -Wiredterminal panel, with goldplated terminals

8 Dual Concenl r ic DMT dr ive un i t

8 Bass unit, dr iven below 400H2

8 Mass Tuned Passive Cone

Advanced cabinet structure

Cross braced driver/cabinet design

Hard-Wired, h igh qual i ty min imal is tcross-over network

Ergonomica l ly des igned, B i -Wiredtermina l panel . w i th go ldolated terminals

8 Dual Concent r ic DMT dr ive un i t

8 Bass unit, dr iven below 400H2

Smooth H.F. Í rom ' tu l ip 'waveguide

and 30kHz tweeter

Smooth H.F Í rom ' tu l ip 'waveguide

and 30kHz tweeter

Vented bass driver chassis reducesthermal dynamic compresstonHigh sens i t iv i ty

High qual i ty Van den Hul in terna l r ,v i r ing

Faci l i ty Íor mass-loading base

Floor s tanding des ign wi thcoupl ing sp ikesBlack ash or walnut Í in ish

5 year warranty

Vented bass driver chassis reducesthermal dynamic compressron

High sens i t iv i ty

High qual i ty Van den Hul in terna lw rnng

Faci l i ty Íor mass- load ing base

Floor s tanding des ign wr thcoupl rng sp ikes

Black ash or walnut Í in rsh

5 year warranty

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A high quality minimalist cross-over integrates the 6.5"moulded cone-piston bass uni t wi th a 25mm minimumdiffraction aluminium dome tweeter. The design benefitsÍrom a combined braced bass driver and advanced cabinetstructure. These design considerations l inked with Tannoy'spedigree oÍ audiophi le sound Írom al l enclosure s izes ensurean uncompromised sound qual i ty f rom the Tannoy 605.

A vented box system combined with an 8 ' moulded cone-piston bass unit provrdes a tight, controlled but extendedbass resoonse. whi le a 25mm minimum di f f ract ionaluminium dome tweeter ensures accurate high Írequencyreproduct ion al l the way up to 30kHz. A smooth mid-band isensured by a high qual i ty minimal ist cross-over network.PerÍormance is Íurther enhanced by cross bracing the bassuni t wi th in Tannoy's advanced cabinet structure.

The BasdlUlid 0riYercThe bass units are constructed with precision built rigid tramesusing large magnets to ensure high sensitivity and lowÍrequeÍlcy control. These chassis are Íitted withan anti-difÍraction ring to ensure an output ,ír,runhindered by the drive unitchassis. State oÍ the art injectionmoulded cone-oistons are used with acareÍully chosen proÍile and Ílare, andinclude an inverted dust cap optimisedto produce the most neutral and naturalmid-range.

The TweeterThe 25mm aluminium dome is mounted in aminimum ditfraction Íace plate which blendssmoothly into the Íront bafÍle. The dome isattached to a high temperature polyamideinsulated coil wound onto a Kapton Íormer. This iscooled and damped by the use oÍ a magnetic Í luid. A nitr i lerubber surround was chosen Íor the suspension because oÍ itsgood self-damping non-variable temperature properties. VerycareÍul and subtle design has produced a tweeter capable oÍsmoothly reproducing up to 30kHz. The dome itselÍ isprotected by a metal grille which is easily removed Íormaximum performance, or retained in situations wheredamage to the dome might occur.

The ïerminal PanelOne small area that clearly demonstrates just how muchthought has gone into every aspect oÍ the SIXES design isprobably the terminal panel. Specifically:- the two Bi-Wiringlinks are captive in the design - so cannot be lost. Theterminals have a slot on the top oÍ them, so that they can be.tightened onto cables with some Íorce, and have a brass insertin them to prevent any rísk oÍ a thread stripping. The terminalsare deep enough b accommodate the Íul l length oÍ 4mm plugseven when the Bi-Wiring l inks are st i l l in place. The Bi-Wiringlinks are halÍ round so that large diameter cables can beaccommodated with the links in place and screwed tightly onto a Ílat surface.

Gross-Íhar lletwofis With tlusic In MindThe cross-over networks used in the SIXES are Hard-Wiredand made up from the Íinest quality electronic componentsincluding iron-dust core inductors and polypropylenecapacitors. These are careÍully positioned well away f rom thedrive units in order to minimise the magnetic and electr icaleÍÍects which they can have upon each other and the dynamicsof the music. You will read elsewhere in this brochure thephrase 'minimalist cross-over network'. This meanssimply that we have reduced any unnecessaryresistance and/or impedance in the way oÍthe musical signal to an absoluteminimum. However well designedelsewhere a loudspeaker may be, anoverly complex cross-over networkcould ensure that your music collectiongathers dust from lack oÍ use.

lntemalBracingComprehensive intemal bracing is usedinside all the SIXES, bracing the crowns andbases, drivers and cabinet walls via lossycouplings into a comprehensive energycontroll ing structure. This reduces significantly,cabinet derived colourations.

I t is no exaggerat ion to c la im that the 603 sets newstandards of aural and visual p leasure for such a modest lyproport ioned loudspeaker. The design consists of a 5 ' Bassuni t /ducted port system and the 25mm aluminium dometweeter that i t shares wi th i ts larger brothers. The designalso beneÍ i ts Í rom Tannoy's new cabinet structure and ahigh qual i ty minimal ist cross-over network.

To perform at their best loudspeakers need to be held r ig id,and stand mount ing raises them to an opt imum height, sothat when listening, the tweeters are approximately at thesame height as your ears. To achieve this we have producedthree pairs oÍ stands oÍ different heights and a foundation,speci Í ical ly designed to gain the best performance Írom ourloudspeakers, whi lst complement ing them visual ly.

Heights f rom top surface to t ip oÍ Í loor spikes .

6s3 = 585mm, 6s5 = 515mm, 6s7 = 415mm, 6s1 = 60mm.

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Advanced cabinet structure

Cross braced driver/cabinet design

Hard-Wired, h igh qual i ty min imal is tcross-over networkErgonomica l ly des igned, B i -Wiredtermina l oanel6 .5 Moulded cone-o is lon bass dr iver

25mm DMT min imum d i Í Í rac t iontweeterProvision for down spikes orbolt ing to standDucted port system

Black ash or walnut Í in ish

5 year warranty

Advanced cabinet slructure

Cross braced driver/cabinet design.

Hard-Wired, h igh qual i ty min imal is tcr0ss-0ver networkErgonomica l ly des igned, B i -Wiredtermina l panel .

I Moulded cone-oiston bass driver

] Advanced cabinet structure

J Cross braced driver/cabinet design.

I Hard-Wired, h igh qual i ty min imal is tcross-over network

I Ergonomica l ly des igned, B i -Wired

termina l oanel .- l 5 Moulded cone-oiston bass driver

25mm DMT min imum d i Í Í rac t iontweeterProv is ion Íor down sprkes orbo l t ing to s tandDucted port system

Black ash or walnut f in ish

5 year warranty

25mm DMT min imum d i Í Í rac t iontweeterProv is ion Íor down sp ikes orbo l t ing to s tandDucted port system

Black ash or walnut f in rsh

5 year warranty

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] Central oi l lar can be mass-loaded to increase stabi l i tv andlower the centre oÍ gravity

I Fac i l i ty Íor r ig id ly bo l t ing to the SIXES

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I 6s3 designed Íor use with 603

I 6s5 designed Íor use with 605

6s7 designed Íor use with 607, 6og

6s1 des igned Íor use wi th 6r '1 , 613, 615

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