– Hi-Fi News (July 2000)

‘Going back to conventional speakers afterwards merely highlights how great the 989 is’

The closest approach...

Ask many of the finest recording professionals in the world what their speaker of choice is as the answer is surprisingly common. The Quad ESL opens a window on a recording unlike any other speaker.

For professional musicians and studios, this is an invaluable asset, for no matter how good a moving coil loudspeaker may seem - no matter how impressive its dynamic ability, the laws of physics are such that it cannot be as fast and accurate as an electrostatic transducer. An ESL is like a giant capacitor, tracking the music signal with such precision and agility that using them is the only real way to know exactly what is on the recording.

The Quad ESL has been used by Tony Faulkner for many years. He use the ESL 63, the ESL 63 Pro and now uses a pair of ESL 989s for his critical monitoring.

Tony has produced over a thousand classical music recordings using the Quad ESL because he knows he can trust what he hears - that the very essence of the performance is being transferred.

Likewise with acoustic engineers - what do they regard

as an absolute reference? Next time you are visiting a hi- fi show, look for the acoustic engineers - the amplifier designers - even the other loudspeaker designers. More likely than not, they will have a pair of ESLs hidden away in a corner.

Lastly consider the magazine reviewers - the so-called critics with golden ears who listen daily to a multitude of loudspeakers - assessing how they perform. What do they use to compare all other speakers?

Once again, the results are clear. Although arguments rage between them - Ken Kessler, Senior Reviewer at Hi- Fi News Magazine awarded the ESL-57 ‘Product of the Millennium’ back in 2000 and in his mind it has never been surpassed. Paul Seydor, Hollywood editor and the man in charge of the absolute sound waxes lyrical about the ESL 63 at every opportunity, whilst Stereophile magazine has awarded the ESL 989, not only Product of the Year in 2004, but Component of the Year as well - the highest of all awards. The real answer is that Quad ESLs have always been in a class of their own, each generation winning new fans and enthusiasts.

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QUAD Classic Series ESL manual Closest approach
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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.
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