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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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LOUDSPEAKER DRIVER sa LOUDSPEAKER DRIVER MAINTENANCE & REPAIR sa LOUDSPEAKER DRIVER MOUNTING x DRIVER (LOUDSPEAKER) x TWEETER (LOUDSPEAKER) x WOOFER (LOUDSPEAKER) xx LOUDSPEAKER xx TRANSDUCER Experiments with the not-quite-passive radiator. An unconnected driver does interesting things to response. An amateur's version of the Heil air motion transformer (driver). A high-frequency loudspeaker which will reproduce music with very low distortion. Details about the cone's mechanical resonances in a Jordan Modules model JM 50 speaker. How to improve that small, cheap speaker. Replacing the drivers in an inexpensive, but well-made enclosure. Suitable drivers for both vented-box and closed-box systems are listed. Improving cheap tweeters by adding series padding. Good, cost-effective solution for replacing tweeter in the Large Advent speaker. Tip on replacing the woofer in a Janszen 412HP loudspeaker. Tips on resuscitating a moribund pair of EPI 100s whose woofers were burned out. Tip on reducing box volume by using two identical drivers, one behind the other. Specifications for the Western Electric 555 driver (circa 1927). Excursion-limited SPL (sound-pressure level) nomographs. Used to match a driver to an enclosure. Measuring and understanding the driver parameters of a dual-voice-coil subwoofer driver. Advice on series -vs- parallel wiring. Comments on calculating driver specifications which could be "guaranteed" by the manufacturers. Impact on Thiele-Small parameters when parallel drivers are connected and assumed to be one. Using an array of small, identical drivers in a series or parallel arrangement allows you to obtain the efficiency and power handling of a single large driver. Crossover and wiring arrangements shown. Techniques for achieving Thiele-Small alignments using two identical drivers in the same cabinet space. Difficulties in equalizing tweeter drivers equipped with Ferrofluid. Experiments with dual-coil drivers reveals both problems and possibilities for the amateur speaker builder. A primer on driver designs. Experimental introduction to plasma loudspeakers. A passively assisted woofer system. Drivers are modified by adding mass to the cone using lead sinkers and liquid rubber. Tweeter Q problems. An examination of low-frequency resonance of tweeters and the effect on midrange. Includes a simple procedure to modify your third-order high-pass crossover to simulate the Acoustic Butterworth (AB) crossover. Adjusting woofers for high performance. How to modify a reasonably priced woofer so it will perform as well as drivers costing many times as much. Achieve a 3dB down point below 30Hz with a box volume of 3 or 4 cu.ft. Evaluation of the Dynaudio 24W100 9" driver. Break-in procedure and test results for Radio Shack's 40-1022A 4" woofer as used in an Isobarik configuration. Alternative to the compound ("Isobarik") woofer involves mounting the two woofers on the front baffle and adding weights to double the cone mass. Driver retreads. Advice on using older drivers in an equalized closed-box system to achieve a superior loudspeaker. Tip on shipping exposed dome tweeters to avoid damaging the dome. The dust cap solution. An in-depth look at the dust cap covering the voice coil in a speaker driver. How it works and how it impacts the sound. A comparison of the design and/or construction differences between the Meniscus Eclipse and the Fried Products cone drivers (both made by the Carbonneau company). Thiele/Small/Beranek parameters for the University C-15W woofers. Matching driver efficiencies. How loudspeaker manufacturers calculate driver sensitivity ratings. How to successfully match driver efficiencies in multi-driver systems. A two-woofer box system. A look at the intricacies of cone weighting (increasing a cone's mass) to increase bass efficiency. Additional information on calculating the performance of double drivers (such as side-by-side parallel-connected drivers). Choice between using one large (10") woofer or two smaller (6.5") woofers in a subwoofer is discussed. Tip on modifying (improving) an inexpensive woofer or mid-range speaker (like the Pioneer A11EC80-02F) by applying a thin bead of glue around the inside edge of the surround where it meets the cone. Mathematical analysis of two identical side-by-side drivers to determine the system efficiency. Measuring driver flux density. How driver characteristics are interrelated and techniques that allow you to determine the salient characteristics of drivers. Should you download your woofer? Factors you should consider before you point a woofer toward the floor (called downloading or downfiring). Low cost stroboscopic spider analysis. Using electronic flash and high-speed photography to study the movement of loudspeaker cone and spider. Of mass and resistance. Equations to determine how much mass and/or resistance to add to achieve optimum driver sensitivity. How added mass affects other Thiele/Small equations governing driver behavior. Low-distortion speaker design. An industry insider looks at how loudspeaker components work and what makes them work better. Part 1. An overview of cone drivers. Low-distortion speaker design. Part 2. Magnetic systems and speaker baskets. Minimum phase, high-order filtering. Driver-selection tips and several high-order filters that make minimum phase practical. Low-distortion speaker design. Part 3. The crucial voice coil. Low-distortion speaker design. Part 4. Use of ferrofluids. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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