JBL LXE550 BLK, LXE550, LXE770, LXE330, LXE990 Manual

LXE SERIES

OWNER’S

MANUAL

L X E 3 3 0

L X E 5 5 0

L X E 7 7 0

L X E 9 9 0

LXE

S E R I E S

INTRODUCTION

Congratulations on choosing JBL loudspeakers. Their highly

accurate, uncolored and balanced sound character will greatly increase your enjoyment of recorded music. JBL speakers are built with careful attention to detail, using only the highest quality materials. They will provide many years of excellent performance.

The LXE Series rivals the performance of loudspeakers available at considerably higher price points; and achieves remarkable imaging, sound stage, and musicality.

Acoustic Reflection Cancellation (ARC): Provides smooth, well-defined high frequency response. Because the LXE tweeter faceplate has no concentric or parallel lines, it produces high frequency signals without diffraction.

Pure Titanium, Smooth Dome Tweeter with Diamond Surround: Provides low resonance frequency, low distortion, flat and smooth high frequency response, and no break-up in the audio range. The result is a well-defined high frequency output.

High Polymer Laminate Midrange Drivers and Woofers:

Combine to provide tight bass and well-defined, smooth midrange, without harshness, stridency, or listener fatigue.

High Quality Crossover Network: The computer-optimized dividing network employs up to third-order (18 dB per octave) crossover sections. JBL’s use of high quality capacitors and low- loss/low-distortion inductors assures freedom from phase or amplitude distortions.

Neoprene-covered Baffle-board:

Specially designed, acoustically damping, and absorbent Neoprene foam surface surrounds the speaker’s drivers and absorbs diffraction waves.

Acoustically Optimized Cabinet and Grille Design: Provide smooth uncolored sound and eliminate diffraction and unwanted resonances.

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PLACEMENT

For the best stereo reproduction, the two loudspeaker systems should be an equal distance from your listening position and separated so that the angle between them, at the listening position, is between 40 and 60 degrees (see Fig. 1). For example, if your listening position is 8 to 12 feet (2.5 to 4 m) from each speaker, the two systems should be about 8 feet (2.5 m) apart. Placing the loudspeakers in corners or against a wall will result in the strongest (not necessarily the most accurate) bass. Since all LXE models have ports on their front baffles, the speakers may be pushed up against a wall or bookshelf surface.

40°-60°

Fig. 1

Compact systems will also benefit from placement on stands or shelves. For the best stereo imaging, we recommend that the systems be placed so that the high frequency transducers are as close as possible to the ear level of a seated listener. Every room is different and there are different tastes. So don’t hesitate to experiment on your own.

POWER HANDLING

Thanks to their high efficiency, the LXE Series loudspeakers will produce reasonable volume levels in a room of moderate size with very little amplifier power. However, using a small amplifier to obtain the desired volume listening levels may lead to overdriving the amplifier. This will generate high distortion levels and may cause damage to your loudspeaker. For the best performance, an amplifier should be selected with an output rating that is greater than the maximum power that will be used. This margin of reserve power will ensure that the amplifier will not attempt to deliver more power than its design allows. However, the power amplifier’s power rating per channel must not exceed

the maximum recommended amplifier power for that specific loudspeaker model. Please see the specifications section for details. Following these guidelines will provide virtually distortion-free sound reproduction and long loudspeaker life.

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