Electronic Suspension makes LWE the most technically advanced speaker in history of sound reproduction.
What is Electronic Suspension? LWE researchers have taken the principle of inverse (negative) feedback used so effectively in amplifiers-and adapted it to use in LWE speakers.
This revolutionary breakthrough in technology has been recognized by issuance of U.S. Patent No. 3,449,518, dated June 10, 1969.
LWE Electronic Suspension speakers can be used with any good amplifier (min. 20 dB of feedback). The above circuit illustration shows how feedback voltage is derived when the LWE is connected to amplifier. A voltage is developed and fed back to the same point in the amplifier that the negative voltage feedback enters.
How does Electronic Suspension work? LWE speakers utilize an electronic network to generate their own error voltages when the speaker does not follow the amplifier out-put. Inverse feedback is utilized to control the speaker cone electronically at all times, rather than allowing a resonant mechanical or acoustic mass-spring system to discolor response at low frequencies. Such "discoloration" occurs in most conventional designs such as folded horn, acoustic suspension, tuned port, drone cone, and bass reflex speakers.
How does Electronic Suspension improve speaker reproduction?
Provides the best transient response ever achieved in a Hi-Fi speaker.
Eliminates speaker resonance and its bad effects (resonant peaks, boomy bass and muffled percussion).
Extends low frequency response, ranging from 20-20,000 Hz in the LWE II to 29-15,000 Hz in the LWE VI.
Makes possible Room Gain Control to compensate for room acoustics and size.
Delivers infinitely better musical instrument definition and clarity.
Reduces distortion almost completely ... especially at high volume levels.
Increases speaker efficiency 5-10% over passive means of speaker equalization
Allows freedom in speaker placement due to compact size (fits on floor or shelf-horizontal or vertical positioning).
Adapts to any good quality amplifier or receiver, solid state or vacuum tube. (min. 20dB)
*Flat response range.
There are only two good things about an LWE "Instant Kit" --- sound and price.
You might call it our starving artists model. For people who appreciate the art of music, but feel they can't afford the full price of a wood-finished LWE speaker. Here's how it works. Instead of buying LWE in a hand-crafted, oil walnut cabinet with grille, you buy LWE in an unfinished, 3/4-in. plywood and novaply housing without grille. You get the same unsurpassed sound reproduction of LWE with Electronic Suspension.
But you get it at a savings up to 30%. Sound good? You bet! And with a little creative painting or staining or veneering on your part, you could turn our ugly duckling into your own thing. Ask your dealer about LWE's money-saving "INSTANT KITS." It's simply a great buy.
Kit sizes: LWE land III, 17"x25"x12" LWE II, 23 1/2"x33 1"x16" LWE VI, 10" x 20" x 8 1/2".
LWE. The Sound of Excellence.
ACOUSTRON CORPORATION / 2418 Bartlett Street, Houston, Texas, 77006 / Phone: (713) 524-7407
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(Audio magazine, 11/1969)
Also see:
Wharfedale Variflex Model W80 speakers
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