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Eminent LFT-11 Owner's Manual

Planar magnetic multimedia reference loudspeaker
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The LFT-11 Planar Magnetic Multimedia Reference Loudspeaker
Congratulations on purchasing the Eminent Technology LFT-11. The LFT-11 is the
most advanced loudspeaker technology available for computer multimedia. With proper
care and use, the LFT-11 should last many years. To get the most out of the LFT-11,
please read the manual carefully. Do not forget to fill out the warranty form in the back of
the manual so we can register your purchase.
UNPACKING
The shipping box should contain a Manual (This document), Woofer Cabinet,
Amplifier, Two Planar Desktop Speakers, Monitor Stand, and Connecting Cables.
Remove all of the components. Be careful with the speakers in the woofer cabinet making
sure that you do not push inward on the speaker cones through the cloth covering as
damage could result.
SETTING UP THE LFT-11
The woofer cabinet is designed to be positioned underneath or beside a desk.
Ideally it should be positioned on the floor underneath the monitor firing in the direction
of the listener however this is not critical to achieve the best performance.
A stand is supplied to provide a location for the amplifier directly underneath the
monitor. In some installations, this may not be practical, however we found that it is a
user-friendly location allowing quick access to the volume and tone controls. In any case,
be sure and position the amplifier where nothing is directly on top of it preventing heat
from escaping.

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Summary of Contents for Eminent LFT-11

  • Page 1 The LFT-11 Planar Magnetic Multimedia Reference Loudspeaker Congratulations on purchasing the Eminent Technology LFT-11. The LFT-11 is the most advanced loudspeaker technology available for computer multimedia. With proper care and use, the LFT-11 should last many years. To get the most out of the LFT-11, please read the manual carefully.
  • Page 2 The Planar Desktop Speakers are designed to be positioned on either side of the monitor. They could be placed anywhere around the monitor. Generally they should be at least three inches from the wall behind them for best sound quality. This is the only limitation.
  • Page 3 Left Desktop Right Desktop Amplifier Input Speaker Speaker Eminent Technology Incorporated 225 East Palmer Street Tallahassee,FL 32301 LINEAR FIELD TRANSDUCER MODEL NO. LFT-11 SERIAL NO. Made in the United States U.S. Patent #4,837,838 Electrical connections from the amplifier to the woofer cable are as follows:...
  • Page 4 GETTING THE BEST PERFORMANCE FROM THE LFT-11 The LFT-11 is designed to be an accurate transducer. As a result it will reveal many limitations in the playback medium and recordings. Differences in sound quality between different sources such as AM or FM radio, the compact disc, or different digital recording schemes and sampling methods will be readily apparent.
  • Page 5 Most Computer systems are installed in areas where the wall behind the speakers is acoustically reflective. To get the best tonal balance from the LFT-11 we would suggest experimenting with placing some sound absorbing material on the wall behind the desktop speakers and monitor.

  • Page 6: The Linear Field Transducer

    THE LINEAR FIELD TRANSDUCER Eminent Technology's Linear Field Transducer, introduced as the LFT, represents a new approach to the design and construction of a high-quality multimedia loudspeaker*. It builds on the strengths of previous planar designs while eliminating many of their...

  • Page 7: Diaphragm Construction

    It also lowers off axis sound levels. THE MAGNET / FRAME STRUCTURE The magnet/frame structure developed for the LFT-11 is also unique. Eminent Technology builds its magnets into individual steel channels, the size and shape of which have been carefully designed to help "focus"...
  • Page 8 By applying such new techniques to planar loudspeaker construction, Eminent Technology has been able to eliminate many of the flaws inherent in earlier designs Cloth is used on the backside of the speaker to resistively load the diaphragm.

  • Page 9: Technical Specifications

    Since it is now possible to have a powerful, precisely aligned magnet structure on both sides of the diaphragm, true push-pull operation has been achieved: Regardless of the degree of excursion the diaphragm undergoes, the voice element is always optimally positioned within the magnetic field.
  • Page 10 C1= 220 uF C2= 3.3 uF C3= 330 uF L1= .55mH L2= 5.5mH L3= 1.5mH R1= 8 ohms Woofer resistance = 8 LFT panel resistance = 5.6 Note: If additional low frequency output is desired for your application an additional 10 watt-8 ohm resistor can be placed in parallel with R1.
  • Page 11 The LFT-11 Measured Frequency Response The LFT-11 Impedance Curve Copyright © 1995-2003...
  • Page 12 Eminent Technology LFT-11 Warranty Form Name Address State City Home Phone Number Dealer Purchased From Dealer Address City State Date Purchased Serial Numbers Please complete this form and return to : Eminent Technology Inc. P.O. Box 6894 Tallahassee, FL 32314...