Quad ESL 2912 Owners Manual

Page 1

ESL Series

/\T

P ESL 2812
ESL 2912

Owners Manual
-

QUAD

the clam-t approach to the original sound

Page 2

Important Safety Instructions

q RISK OF ELECTRIC SHOCK
DO NOT OPEN

TO REDUCE THE RISK OF ELE(TRIC SHOCK DO NOT REMOVE (OVER
NO USER-REMOVEABLE PARTS INSIDE
REFER SERVICING T0 QUALIFIED PERSONNEL

ADVERTISSEMENT: RISOUE DE CHOC ELECTRIOUE-

NE PAS OUVRIR

This symbol indicaTes ThaT dangerous volTage
consTiTuTing a risk of elecTric shock is presenT
wiThin This uniT.

This symbol indicoTes ThaT There are imporTanT
operaTing and moinTenonce insTrucTions in The
liTeraTure accompanying This uniT.

Read These insTrucTions.

Keep These insTrucTions.

Heed all warnings.

Follow all insTrucTions.

Do noT use This opporaTus near waTer.

Clean only wiTh dry cloTh.

Do noT block any venTilaTion openings.

InsTall in accordance wiTh The manufacTurers insTrucTions.

Do noT insTall near any heaT sources such as radiaTors, heaT
regisTers, sToves, or oTher apporaTus (including ampliTiers)
ThaT produce heaT.

Do noT defeaT The safeTy purpose of The polarised or
grounding plug. A polarised plug has Two blades wiTh one
wider Than The oTher. A grounding plug has Two blades and
a Third grounding prong. The wide blade or The Third prong
is provided for your safeTy. lf The provided plug does noT fiT
inTo your ouTleT, consulT an elecTrician for replacemenT of The
obsoleTe ouTleT.

ProTecT The power cord from being walked on or pinched
parTiculorly aT plugs, convenience recepTacles, and The poinT

where They exiT from The apparaTus.

Only use aTTachmenTs/accessories specified by The
manufacTurer.

Use only wiTh The can, sTand, Tripod, brackeT,
or Table specified by The monufacTurer, or sold
wiTh The apparaTus. When a carT or rock is used,
use cauTion when moving The carT/apparaTus
combinaTion To avoid iniury from Tiprover.
Unplug This apparaTus during ligthing sTorms or when
unused for long periods of Time.

Refer all servicing To qualified personnel. Servicing is
required when The apparaTus has been damaged in any way,
such as where The power supply cord or plug is damaged,
liquid has been spilT or The apparaTus exposed To rain or
moisTure, does noT operaTe normally, or has been dropped.

CAUTION: These servicing insTrucTions are for use by
qualified service personnel only. To reduce The risk of
elecTric shock, do noT perform any servicing oTher Than
ThaT conToined in The operaTing insTrucTions unless you are
qualified To do so.

WARNING: To reduce The nsk of fire or elecTric shock, do
noT expose This apparaTus To rain or moisTure. The apparaTus
shall noT be exposed To dripping or splashing liquid and
obiecTs filled wiTh liquids, such as vases, shall noT be placed
on The apparaTus.

No naked flame sources, such as lighTed candles, should be
placed on The apparaTus.

CAUTION: Changes or modificaTions noT expressly
approved by The monufacTurer could void The users auThoriTy
To operaTe This device.

WARNING: The mains pIUQ/appliance coupler is used To
disconnecT The device and musT remain readily operable.

CAUTION: Do noT power The speaker for aT leasT 8 hows
afTer unpacking unTil TemperaTure and humidiTy levels
sTobilise.

This equipmenT is a Class IT or double insulaTed
D elecTrical appliance. lT has been designed in such
a way ThaT iT does noT require a safeTy connecTion
To elecTrical earTh.

CorrecT disposal of This producT. This

marking indicaTes ThaT This producT should

noT be disposed wiTh oTher household wosTes

ThroughouT The EU. To prevenT possible

harm To The environmenT or human healTh
_ from unconTrolled wasTe disposal, recycle iT
responsibly To promoTe The susTainable reuse of
maTerial resources. To reTurn your used device,
please use The reTurn and collecTion sysTems
or conTacT The reTailer where The producT was
purchased. They can Take This producT for
environmenTally safe recycling.

IAG-QUAD

Page 7

Positioning the Loudspeakers

However good the loudspeaker, the final results will depend on the acoustic characteristics oi the listening room and the
position of the loudspeakers in it. Do not be afraid to experiment with both position and orientation and make a point of
trying some of the less obvious as well as the more obvious positions. The benefits obtained from the time spent doing this
can be very rewarding. The subiect of room acoustics is complex and beyond the scope of this manual. it is assumed that
the loudspeakers will be used in a room with moderate reverberation, neither too bright nor over damped. Furnishings
can alter the acoustic characteristics of the listening room, and here common sense is the best guide.

The loudspeakers have constant directivity over a wide angle in both horizontal and vertical planes, so the response does
not vary with the height of the listener's ears from the floor.

When experimenting, it is preferable to use good recordings or works with which you are familiar in the concert hall or
good quality speech

The ESL loudspeaker, being a dipole source, has considerable advantages over conventional loudspeakers in terms of
room placement. No energy is radiated in the plane of the diaphragm and, as a consequence, the respective axial room
modes are discriminated against. Normally the loudspeaker is placed at an angle to both horizontal room axes. This will
excite both sets of horizontal axial modes although this excitation will be 3 dB less than with a conventional source and
discriminate entirely against the vertical axial modes.

The loudspeakers should be placed at least 60cm (2 ft) from the rear wall of the listening room and angled towards the
listener. Placing the ESLs too close to rear walls will adversely affect their dispersion characteristics; about i/3 at the
way down the length of the room is a good starting point. It is not advisable to operate the loudspeakers across corners,
in alcoves or behind furniture. Because ESLs are a homogeneous sound source it will be found that they can be placed
considerably further apart than normal, broadening the stereo sound stage. Close proximity to the side walls is not
detrimental to performance and can actually benefit the bass response. Simple geometry will show that if the ESL is placed
at an angle to the side wall, there will be no audible reflection at the listening position.

>50m n

2.55m

>600mm

Page 16

Specifications

Model

Format

Type

Point Source Time Delay
Chassis Structure

Panel Elements
Maximum Output
Sensitivity

Naminai impedance
impedance Variation

Maximum input
Frequency Response
Directivity index
Distortion (i OOdB @ lm)
AC input

Power Fuse

Power Consumption

Dimensions (H x W x D)
Net Weight

ESL 2812

Floor standing dipole with 3° tixed tiit
Muitipie electrostatic drive membranes
Progressive concentric rings

Heavy duty composite aluminium / steel
4

2 N/m7 at 2m on axis

i .5 mbar per volt reterred to lm
(86dB/2.83V rms equivalent)

8 Ohms

4 , i5 Ohms

Continuous input voltage (rms): lOV
Programme Peak tor undistorted output: 40V
Permitted peak input: 55V

37Hz , 2i kHz (rédB)

33Hz , 23kilz (useable)

See Polar Diagrams

Above lOOOHz Above lOOHz <0.5%
Above SOHZ < l 0%

220 - 240V, liO - iQOV, iOOV
63mA anti-surge, 200 - 240V
iOOmA anti-surge, lOO - i2OV
6W

i070 x 690 x 380 (mm)

35kg

ESL 2912

Floor standing dipole with 3° tixed tiit
Multiple electrostatic drive membranes
Progressive concentric rings

Heavy duty composite aluminium / steel
6

2 N/m7 (1th on axis

i .5 mbar per voit reterred to im
(86dB/2.83V rms equivalent)

8 Ohms

4 , 20 Ohms

Continuous input voltage (rms): iOV
Programme Peak tor undistorted output: 40V
Permitted peak input: 55V

32Hz , ZikHz (rédB)

28H; , 23ki'lz (useable)

See Polar Diagrams

Above iOOOHz <0.15%
Above iOOHz Above Sol-i2 < l .O%

220 - 240V, liO - iZOV, lOOV
63mA anti-surge, 200 - 240V
i OOmA anti-surge, iOO - i 20V
6W

i470 x 690 x 380 (mm)

44kg

* The right is reserved to alter performance, specifications and appearance as required.

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