QUAD Portable Speaker L2 Series User Guide

L2 Series Loudspeakers

the closest approach to the original sound.

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The Quad

Philosophy

Quad has, since the 1950s, led the Our philosophy is based upon a belief

field in loudspeaker development. The thathi-fishouldaddnothingnorremove

famous Quad electrostatics are now, anything from a recording – merely

quite rightly, regarded amongst the very reproduce it. The resulting sound

finest loudspeakers money can buy.

should be without artefacts, distortion,

colouration and truly revealing of the

With a fifty-strong R&D team, our recording process.

researchintoacousticsandreproduction

leads the field in development of Buying a first Quad system is often

quality hi-fi equipment. British design a revelation to customers. Although

and engineering coupled with the neither artificially impressive nor

industry’s most efficient manufacturing imposing, it will produce a natural

facility combine to create products performance and an ease of listening

unequalled in terms of value and that is captivating from the start.

performance.

Quad products are sometimes seen as

Our philosophy is simple - that of the kind of products bought at the end

producing ‘the closest approach to the of a journey through hi-fi; we believe

original sound…’.

they mark the beginning.

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The Quad

-Series

L2 is our new entry point into casting of chassis, terminal plate,

loudspeakers, butthesearebynomeans terminals, dispersion guide, even the

‘budget’ loudspeakers. Using advanced spike assembly all take place in the

composite driver materials, rare-earth same building.

magnets, advanced alloys, quality

terminals and finished in a choice Each cabinet is crafted from

of high-gloss, piano-lacquered real eucalyptus based 25mm MDF, using

veneers, they are fully representative computer controlled precision routers,

of Quad’s commitment to quality and before being assembled. Every cabinet

performance.

is unique, finished with a real veneer

– not reconstituted wood pulp as other

Voiced for a clean, natural mid-range manufacturers use – with seven coats of

performance with crisp, clean detail piano lacquer – each applied by hand,

and a taut, punchy bass performance, then dried at ambient temperature

L2 series loudspeakers excel with well- for 24 hours, then finally hand cut

recorded, complex music scores. The and polished before the next coat is

layering of each instrument or vocal applied. These are fine furniture grade

texture is clear and precise, allowing finishes using the same techniques as

the listener to pick out nuances are used to produce the world’s finest

previously overlooked. Providing a pianos.

‘window’ on the recording, the natural

tone of the recording is fully preserved Whatever your musical tastes, or

to create a real insight into the original listening objectives, be they traditional

performance.

2-channel or AV, the L2-series

loudspeakers will delight and deliver

Our manufacturing facility is possibly flawless performances, unequalled

the world’s most advanced in terms reliability and remain stunning

of loudspeaker production. From centrepiece of your audio system for

raw material to finished product, the many years to come. Backed with

entire process occurs under a single the support of our famous service

roof. Diaphragm production, voice- department, as with all Quad products,

coil winding, magnet assembly, PCB theL2 seriesrepresentaveryworthwhile

printing, crossover manufacture, die- investment.

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The original L-series entered hi-fi’s hall of fame in 2002,

with the 11L winning What Hi-Fi? magazine’s prestigious

‘Product of theYear’ Award – an accolade that was repeated

the following year, and again in 2004, winning best in

class. Around the world the pattern was repeated with

major awards from leading magazines on every continent.

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Series

Technology

Designing loudspeakers is still very chassis creates reflections from the

much an art form, yet modern materials cone movement that are passed back

and components allow us to push through the cone and cause a temporal

the performance envelope further than smearing effect, akin to ‘ghosting’ of a

ever before.

television signal.

Neodymium magnets are used in At Quad, we are fortunate as we

the L2 tweeters. These are a form have the capability of designing and

of ‘rare-earth’ super-magnet. Because manufacturing any chassis structure.

they are so strong and small, when With our own tool shop, die-casting

properly employed, they create a very machines, and drive unit assembly

concentrated magnetic field – ideal plant, we can control the complete

for the small excursions required for a process from design to manufacture.

good high-frequency response.

The L2 series uses a new low-profile

Whilst most moving-coil tweeters version of the 4-arc driver chassis used

use copper voice-coils, we have in the original L-series. While the same

developed for the L2 series a new curved, self-bracing design is used, all

wound aluminium alloy voice coil the legs are now profiled and narrowed

– capable of higher power handling to minimise cone reflections.

that the copper equivalent, with

better thermal stability and a wider The audiophile grade crossover is

bandwidth. This is largely responsible carefully orientated to minimise

for the improvements to detail and magnetic induction and, on bookshelf

resolution over the original L-series. models, we have added our unique

A good bass driver chassis design is twin port arrangement (designed to

essential for smooth mid-range. A poor reduce distortion by up to 50%).

Technical Improvements

Metallised Polypropylene low-loss Internal bracing is applied to even

capacitors are used in an audiophile the bookshelf models now, designed

grade crossover. All components are specifically to randomise the internal

mounted on glass-fibre PCBs with non- reflections and cause rapid dissipation

interlacing tracks. Perfect layer, air- of internal standing waves for a clean,

cored inductors are used, mounted fast bass response.

cross-axially to preventmagnetic

intermodulation.

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The theory of

Good Design

According to Quad’s philosophy vocal range of frequencies, which

good loudspeaker should add is also the range that moving-coil

nothing, nor remove anything from the loudspeakers crossover from using the

recorded sound. Many loudspeakers mid/bass driver to the high frequency

on the market adhere instead to a tweeter.

philosophy of extending the high

and low frequencies to make an The art of

good crossover is

artificially ‘impressive’ loudspeaker. simplicity, but for other manufacturers

Such an approach can sound good in the crossover needs to compensate for

the dealer’s demo room but is quickly slight miss-matches between bought

fatiguing and often masks the more in components – Quad doesn’t buy

subtle nuances of a recording.

in components, we make them all

in-house, so our loudspeakers are

Our engineers focus instead on the designed in perfect synergy. Our

audible range, ensuring as smooth crossovers are extremely simple and

as possible an integration between retain all of the precious mid-range

bass and treble. This is the most detail and purity that can so easily

crucial region of any loudspeaker’s be lost. We use the highest quality

frequency response. The human ear components and windings to ensure

is at it’s most sensitive through the nothing is compromised.

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Quad

Driver

Technology

Freedom to create our own chassis of the music as it was recorded and less

designs, means we are able to stretch room effect.

driver technology to the absolute limits.

The new L2 series bass driver chassis is Quad has led the way in producing

an excellent example of this. Using one of the most remarkable subwoofers

very low-profile legs, we can virtually for a new generation of audiophiles.

eliminate the temporal-smearing effect The sealed box, exceptional ‘tri-lam’

of rearward waves being reflected back driver and powerful amplifier add up

through the cone – it’s as if the cone to a performance that leaves little to

were itself just floating in free space.

be desired.

The new L2 series tweeter is the first of Each subwoofer is also supplied with a

it’s kind to use an aluminium voice coil. full function remote control, allowing

This provides much wider bandwidth, the listener to adjust the volume,

and hence resolution. Because of crossover and phase from the actual

it’s unerring accuracy, a holographic listening position. Up to four individual

sound-stage reminiscent of the famous settings can be stored in the memory

Quad ESL is possible. Dispersion is and can be recalled at the press of

optimised for a real in-room response a button.

to ensure that you hear more

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Dual Catenary tweeter dispersion plate – cast from Aluminium, the new tweeter

plate enhances the dispersion characteristic, to prevent ‘beaming’ and to widen

the listening ‘sweet spot’. Polar response is exceptional with the frequency range,

even 45 degrees off-axis, being flat and extended.

This results in a consistently high standard of performance, regardless of where the

listener is sat in the room and reduces the effect that room furnishings have on the

in-room response.

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2-^ThS^eubwoofer

Technology

A revolutionary drive unit material Further innovations include a powerful

is only the start of the technological 300WRMS amplifier module coupled

innovations that make this new Quad with a brand new filter stage. A

subwoofer a fine addition to any microprocessor controlled filter

surround or stereo system.

section has been developed adjustable

between 35 and 85Hz in 10Hz steps

The ‘tri-lam’ cone is a composite – each having a discrete path for the

construction comprising of cleanest signal possible.

hydraulically moulded and thermoset

lamination of three materials. The inner A full function remote control allows

layer is bi-directional weave carbon the user to calibrate the subwoofer

fibre, the two outer layers are bi- (crossover, volume and phase) from

directional weave glass fibre. The outer the listening position and store up to

rim of the cone incorporates four settings in the memory, which can

rim-edgestiffeningwithinthedesign.The be recalled at the touch of a button.

resulting cone is extremely rigid and Finished in the same choice of high

lightweight, ensuring very low energy quality piano lacquered veneers as

losses, even at extremes of volume, the existing L-series models, the L2-

and without the delays associated with subwoofer is as attractive a piece of

high-mass paper pulp or plastic cones furniture as it is accomplished as a

commonly used in subwoofer drivers.

reference subwoofer.

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Series

Specifications

9L2

11L2

12L2

21L2

22L2

Model

Transducer Complement

Bass Driver

2 Way

4” / 100mm

5” / 125mm

6.5” / 170mm

1” / 25mm

6 Ohms

Mid Driver

Soft Dome Tweeter

Nominal Impedance

Freq Response +/- 6dB

Upper Freq Limit -10dB

SPL 1W @ 1m

1” / 25mm

6 Ohms

50Hz-28kHz

32kHz

1” / 25mm

6 Ohms

45Hz-28kHz

32kHz

1” / 25mm

6 Ohms

45Hz-28kHz

32kHz

1” / 25mm

6 Ohms

35Hz-28kHz

32kHz

30Hz-28kHz

32kHz

85dB

86dB

88dB

89dB

Power Handling

Continuous Programme

Recommended Amp

System Fb

75 Watts

85 Watts

100 Watts

30 - 200 W

50Hz

125 Watts

40 - 200 W

40Hz

150 Watts

30 - 120 W

60Hz

30 - 150 W

55Hz

50 - 300 W

35Hz

Crossover Frequencies

Dimensions (HxWxD) mm

Gross Weight

2.2kHz

150Hz, 3.0kHz

850 x 205 x 278

38.1kg

248 x 152 x 205

9.2kg

310 x 190 x 243

12.6kg

330 x 205 x 253

15.2kg

780 x 205 x 263

34kg

Carton Size (HxWxD) mm

322 x 398 x 258

405 x 313 x 495

440 x 325 x 530

970 x 365 x 630

1035 x 375 x 630

L-ITE Sat

L2 Centre

L-ITE Centre

Finishes (all models)

Model

2 Way

Transducer Complement

Bass Driver

Piano Cherry

Piano Rosewood

Piano Birds Eye

Piano Black

4” / 100mm

5” / 125mm x2

4” / 100mm x2

Mid Driver

1” / 25mm

6 Ohms

70Hz-28kHz

32kHz

1” / 25mm

6 Ohms

70Hz-28kHz

32kHz

1” / 25mm

6 Ohms

80Hz-28kHz

32kHz

Soft Dome Tweeter

Nominal Impedance

Freq Response +/- 6dB

Upper Freq Limit -10dB

SPL 1W @ 1m

86dB

88dB

87dB

Power Handling

75 Watts

70 Watts

85 Watts

Continuous Programme

Recommended Amp

System Fb

30 - 120 W

70Hz

30 - 150 W

60Hz

30 - 120 W

75Hz

Piano Silver

2.2kHz

2.0kHz

2.5kHz

Crossover Frequencies

Dimensions (HxWxD ) mm

Gross Weight

225 x 135 x 160

6.2kg

163 x 428 x 206

8.8

135 x 340 x 160

6.2

L-ITE Series Surround Package

278 x 426 x 192

273 x 255 x 505

240 x 191 x 400

Carton Size (HxWxD) mm

L2 Sub

L-ITE Sub

Model

Single Tri-Lam Driver

12” / 300mm

300 Watts

Single Tri-Lam Driver

10” / 250mm

300 Watts

Transducer Complement

Bass Driver

Amplifer Output power

Line Input Sensitivity

Input Impedance

250mV for 100W output

10 kOhms

250mV for 100W output

10 kOhms

25Hz-95Hz

32Hz

25Hz-95Hz

Freq Response (boundary)

Low Frequency Limit -10dB

Avg. Max output @ 1m

Crossover Range

32Hz

L2 Series Surround Package

113dB

108dB

35-85Hz

35-85Hz (plus bypass)

485 x 288 x 435

28.5kg

535 x 345 x 465

31.6kg

Dimensions (HxWxD ) mm

Gross Weight

555 x 470 x 640

418 x 544 x 617

Carton Size (HxWxD) mm

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Quad Product Range

Refer_se_en_{r i}c_ee_s

Electrostatic Loudspeakers

• ESL - 2805

• ESL - 2905

ESL - 2805

Performance

s e r i e s

Loudspeakers

Electronics

• L-ITE 5.1 System

• L-ITE Mini Loudspeaker - Pair

• L-ITE Centre Loudspeaker - Single

• 9L2 Loudspeaker - Pair

• 11L2 Loudspeaker - Pair

• 12L2 Loudspeaker - Pair

• 21L2 Loudspeaker - Pair

• 22L2 Loudspeaker - Pair

• L2 Centre Loudspeaker - Single

• L2 Subwoofer - Single

• 99 CDP-2

• 99 CD-S

• 99 Pre

• 99 Stereo

• 99 Tuner

• 909 Stereo

• 909 Mono

• L-ITE Subwoofer - Single

99 - Pre Amp

99 - Power Amp

Classic

s e r i e s

Electrostatic Loudspeakers

• ESL - 989

• ESL - 988

Amplifiers

• II-forty Power Amplifier (mono)

• II-Classic Power Amplifier

• QC-twenty four Pre Amplifier

• QC-24P Phono stage

Quad ll-Forty Power Amp

QC24 Pre Amp

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Quad Electroacoustics Ltd,

IAG House, Sovereign Court, Ermine Business Park,

Huntingdon, Cambs, PE29 6XU

Tel :- 01480 447700, Fax :- 01480 431767

www.quad-hifi.co.uk

The information in this brochure is subject to change without

Quad is a member of the International Audio Group

Qu.L2.11.2006

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