Quad Electroacoustics ESL 2805 User Manual - page 3
The Closest Approach
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Congratulations, you have become the owner of a pair of QUAD ELS
loudspeakers.
For 50 years Quad Electroacoustics has produced the worlds finest
loudspeakers, considered by many to be the most accurate and neutral
of all speakers.
The ESL 2805 and 2905 represent the latest evolution of the unique
Quad electrostatic concept. Radically redesigned using the most up to
date materials and processes, these new evocations of our design
philosophy achieve levels of detail, clarity and perspective that will be a
revelation and source of continuing delight to all music lovers .
Stemming from pioneering research in the early 1950's, the first Quad
electrostatic speaker, the ESL 57, pushed forward the boundaries of
electrostatic techniques so effectively that this 2005 series is only the
fourth generation of the technology.
The ESL loudspeaker is a doublet or dipole, which produces a spherical
sound field from a point source. All naturally created sounds emanate
from a point source and the ESL speaker concept more nearly
recreates this point source effect than any other speaker currently
available. Another key feature of our unique linear motion design is
very low distortion - your Quad ESLs are probably the lowest distortion loudspeakers ever made - and this
includes the bass region where conventional speakers suffer from time related delays and associated
distortions.
The result is a loudspeaker of unsurpassed accuracy and one which has stood the test of time. Major
recording studios have ESLs amongst their reference monitoring loudspeakers and our loudspeakers are
consistently in demand by audiophiles who value the clear natural sound that is uniquely the hallmark of
all QUAD products.
Contents
CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IFC
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
WHAT’S IN THE BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
UNPACKING THE EQUIPMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
POSITIONING THE LOUDSPEAKERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CONNECTING THE LOUDSPEAKERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
FINAL ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
MAINTENANCE AND SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
QUALITY ASSURANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ABOUT YOUR LOUDSPEAKER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
MAKING AN ELECTROSTATIC LOUDSPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
THE CLOSEST APPROACH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Introduction
Quad - The Closest Approach by Ken Kessler
A 240 page hard-back, authoritative history with
commentaries and contributions from every corner of the hi-fi
industry. Technical chapters from Tim De Paravicini and
Gordon Hil and interviews with Peter Walker, Ross Walker, Stan
Curtis and Mike Albinson. Along with a series of stunning new
photographs, fascinating historic documents and
reproductions of AES and other technical papers, this is the
definitive guide to the history and achievements of Quad.
Available through all good book retailers or any of our Dealers,
from the Hi-Fi News Accessory Club, the Hi-Fi Collective, or the
Quad Service Department
ISBN number 0-9545742-0-6
The Birth of a Legend
ESL Series
ESL Series