Specifications

Model

ESL 988

Maximum Power Output

2N/m2 at 2m on axis

Sensitivity

1.5u bar per volt referred to 1m (86dB/2.83V RMS)

Impedance

8 ohm nominal

Maximum continuous input voltage

10V

Programme peak ( 20 Hz to 20 kHz )

 

For undistorted output

40V

Permitted peak input

55V

Directivity index

125Hz . . . . . .5.0dB

 

500Hz . . . . . .6.4dB

 

1kHz . . . . . . . .7.2dB

 

8kHz . . . . . . .10.6dB

Axis band limits

-6dB at 35Hz 3rd order

( low level )

-6dB > 20kHz

AC Input

220-240V or 110-120V

( double insulated )

See rating details on base of unit

Dimensions ( H x W x D )

940mm x 670mm x 315mm

(including 185mm base)

(including 185mm base)

Weight

20.5kg net

ESL 989

2N/m2 at 2m on axis

1.5u bar per volt referred to 1m (86dB/2.83V RMS)

8 ohm nominal

10V

40V

55V

125Hz . . . . . .5.0dB 500Hz . . . . . .6.4dB 1kHz . . . . . . . .7.2dB 8kHz . . . . . . .10.6dB

-6dB at 35Hz 3rd order

-6dB > 20kHz

220-240V or 110-120V

See rating details on base of unit

1335mm x 670mm x 315mm (including 185mm base)

25.3kg net

Vintage & Nouveau

Both our international award-winning ESL

 

 

loudspeakers are now available for the first time in a

 

 

choice of colours and finishes. Whilst for some

 

 

audiophiles such details are of trifling importance,

 

 

Quad recognise that for many, the ESL needs to vanish

 

 

into it's surroundings visually as well as audibly –

 

 

whether these surroundings be a stately home or

 

 

docklands apartment.

 

 

The original black-on-black finish is now

 

 

complemented with the ‘Vintage’ and the ‘Nouveau’

 

 

finishes. Sonically, these are identical to the standard

 

 

model, but aesthetically, they offer more variety. The

 

 

Vintage models include a wooden base-plate, as well as

 

 

the wooden top-cap, reminiscent of the older ESL-63

 

 

and a woven – yet acoustically transparent sock as an

 

 

alternative to black. The Nouveau model has a brushed

 

 

metal top-cap and co-ordinated base to complement

Vintage

Nouveau

the light blue colour of the cloth.

 

 

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QUAD Classic Series ESL manual Specifications, Vintage & Nouveau

Classic Series ESL specifications

The QUAD Classic Series ESL (Electrostatic Loudspeakers) stands as a notable innovation in the world of high-end audio reproduction, blending sophisticated technology with classic design elements. These speakers offer a unique listening experience that captivates audiophiles and casual listeners alike, making them a prized addition to any audio setup.

At the heart of the QUAD Classic Series ESL is its electrostatic driver technology. Unlike traditional dynamic speakers, which rely on moving coils and magnets, electrostatic speakers utilize a thin diaphragm positioned between two conductive panels. When an audio signal is applied, the diaphragm moves in response to the electrostatic field, creating sound waves that are remarkably accurate and immersive. This design results in a fast response time, extended frequency range, and minimal distortion, ensuring that listeners experience music as it was intended.

One of the standout features of the QUAD Classic Series ESL is its wide soundstage. The planar design of the electrostatic panels allows for exceptional spatial imaging, meaning that sounds appear to emanate from locations across the room rather than just from the speakers themselves. This immersive quality enhances the listening experience, allowing users to appreciate nuances in both music and film soundtracks.

The Classic Series ESL also incorporates advanced technologies such as the QUAD's unique transformer which allows for high voltage deployment necessary for optimal electrostatic performance while maintaining impedance compatibility with a wide range of amplifiers. Additionally, the design features an adjustable frequency response, enabling listeners to tailor the bass output to their specific listening environment, ensuring that the sound adapts to the acoustic properties of any room.

Constructed with high-quality materials, the speakers sport a sleek aesthetic reminiscent of traditional QUAD designs, appealing to those who appreciate a blend of modern technology and classic elegance. In terms of connectivity, the Classic Series ESL is versatile, compatible with both tube and solid-state amplifiers, expanding its usability across different audio setups.

Overall, the QUAD Classic Series ESL offers audiophiles a remarkable blend of innovative technology, elegant design, and superior sound quality. It not only brings music to life but also enriches the listening experience, making it a quintessential choice for those seeking the ultimate in audio fidelity.