Instruction/ maintenance manual of the product ESL-989 QUAD
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1 ESL-988 & ESL-989 Electrostatic Loudspeakers Instruction Manual CONTENTS IMPORT ANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . .
2 IMPORT ANT NOTES European Union Directives Quad equipment is designed to comply with the legal provisions of EU Directives 89/336/EC and 72/23/EEC. The standards which have been applied were those in force at the time of the introduction of the product.
3 INTRODUCTION The Quad ESL loudspeaker is a full range electrostatic loudspeaker doublet. It consists of a very light electrically polarised diaphragm suspended between two sets of concentric annular electrodes.
4 GUARANTEE AND PRODUCT REGISTRA TION Y our Quad equipment is guaranteed against any defect in material and workmanship for one year from the date of purchase (proof of purchase required). We ask you to complete and return the enclosed W arranty Registration Form (UK).
INST ALLA TION The ESL loudspeaker requires an energising voltage for operation and therefore needs to be connected to an AC power supply . Checking the AC power supply The ESL loudspeaker is designed to operate on one range of AC power supply only , 50/60 Hz.
6 Each loudspeaker should be connected to its appropriate amplifier output so that the two pairs of wires are connected in the same way , to ensure that the speakers operate in phase. Switching On and Off The on/off switch has a rocker action; press the bottom to switch the ESL on and the top to switch it off.
7 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.
8 CARE AND MAINTENANCE The grille cloth may be cleaned with a soft brush or a hand held vacuum cleaner . They are protected against the ingress of dust etc. Periodic servicing at two year intervals is recommended to keep your speakers in pristine condition.
9 ESL-988 SPECIFICA TIONS All measurements made with a 230V AC supply . Maximum output 2 N/m 2 at 2m on axis Sensitivity 1.5m bar per volt referred to 1m. (86 dB/2.83V rms) Impedance 8 Ohms nominal Maximum Continuous input voltage (rms): 10V Programme peak for undistorted output: 40V Permitted peak input: 55V Directivity Index 125 Hz 5.
10 ESL-989 SPECIFICA TIONS All measurements made with a 230V AC supply . Maximum output 2 N/m 2 at 2m on axis Sensitivity 1.5m bar per volt referred to 1m. (86 dB/2.83V rms) Impedance 8 Ohms nominal Maximum Continuous input voltage (rms): 10V Programme peak for undistorted output: 40V Permitted peak input: 55V Directivity Index 125 Hz 5.
IAG House Sovereign Court Ermine Business P ark Huntingdon Cambs PE29 6XU England T elephone: +44 (0) 1480 447700 Facsimile: +44 (0) 1480 431767 email: info@quad-hifi.
Instruction Man ual for Electr ostatic Loudspeakers ESL 988 and ESL 989 ESLmanual Feb02 11/02/04 9:14 AM Page 2.
An important point after buying a device QUAD ESL-989 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought QUAD ESL-989 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data QUAD ESL-989 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, QUAD ESL-989 you will learn all the available features of the product, as well as information on its operation. The information that you get QUAD ESL-989 will certainly help you make a decision on the purchase.
If you already are a holder of QUAD ESL-989, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime QUAD ESL-989.
However, one of the most important roles played by the user manual is to help in solving problems with QUAD ESL-989. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device QUAD ESL-989 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
