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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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LOUDSPEAKER sa HEADPHONE sa LOUDSPEAKER -- BIPOLE sa LOUDSPEAKER -- DIPOLE sa LOUDSPEAKER -- ELECTROSTATIC sa LOUDSPEAKER -- HORN sa LOUDSPEAKER -- ION sa LOUDSPEAKER -- PLANAR & RIBBON sa LOUDSPEAKER -- SUBWOOFER sa LOUDSPEAKER -- TRANSMISSION LINE sa LOUDSPEAKER CROSSOVER & FILTER sa LOUDSPEAKER DRIVER sa LOUDSPEAKER ENCLOSURE sa LOUDSPEAKER IMPEDANCE & IMPEDANCE TESTING sa LOUDSPEAKER MOUNTING sa LOUDSPEAKER PLACEMENT & PHASING sa LOUDSPEAKER TESTING sa LOUDSPEAKER WIRING sa OUTDOOR LOUDSPEAKER x SPEAKER (AUDIO) xx AUDIO EQUIPMENT xx ELECTRONICS Spectacular speakers. Build fine-furniture subwoofer cabinet and matching pair of satellite cabinets that will perform as well as a $2,500 store-bought set. Handles 5 to 100 watts per channel. Est. cost: $500-$600. Two ways to dress up plain box speakers with attractive fabric for the grille or "Hot Licks" soft sculpture. A look at alternatives to speakers in a box. Tips on shopping for speakers and how to adjust a system to your room. L-C/H-Q Mark I. Low-cost, high-quality loudspeaker utilizing an equalized 5"x9" elliptical cone transducer in a totally enclosed 18"x12"x10" baffle. Est. cost: $15. Part 1. L-C/H-Q Mark I. Part 2. Adapting the speaker for use with a separate woofer. A center-mix woofer. How the design parameters were determined and the unit tested. Ideas for experimenting with motional feedback loudspeakers. Transient response (a do-it-yourself clinic). Practical solutions for your system to make recorded music sound more like live music. Looks at cartridge, preamp, amplifier, speakers, etc. Cheap modification for Dahlquist DQ-10 speakers involves adding cotton batting. A quick bookshelf pair. Uses a single full-range 5" speaker, without a crossover or any other special construction techniques. Speaker City's MTM-18 loudspeaker kit reviewed. Slim Jims. Easy-to-build loudspeaker consists of an inexpensive 4" full-range driver ($12) mounted in PVC pipe. JBL L300 Summit renovation. The search for a pair of JBL L300 speakers, and subsequent renovations and improvements to achieve outstanding performance. A first-order 3-way. A relatively simple speaker construction project using first-order crossovers. Part 1. The Sessions Monitor. Part 1. (1) Design concept of a full-range, biamped system in a four-box configuration. (2) Construction of the bass cabinets. The Sessions monitor. Part 2. (1) Design and construction detail of the satellite. (2) Final assembly of the system. A first-order 3-way. A relatively simple speaker construction project using first-order crossovers. Part 2. Construction details. The infinite box concept. Part 1. How a little-known approach to speaker design works and how you can use this technique which consists of putting a woofer in an open-back box and filling the rear of the box with dense damping material. Building the Adire KIT281 speaker kit in the floor-standing vented box configuration with the optional flared port. A related article reviews the speaker. The Cadillac 16. A custom closed-box enclosure (8"x8"x57" tall) incorporates six surplus 6" subwoofers designed for high-end General Motors sound systems, plus a midrange and a tweeter. The infinite box concept. Part 2. Listening test results and construction details of open-backed systems. A trapezoidal closed three-way loudspeaker design. Review and assembly instructions for Adire's HE10.1 high efficiency coaxial driver vented box loudspeaker kit. Assembling and reviewing the SEAS Froy Mark 3 vented loudspeaker kit. Simple satellites. Five companion satellite speakers for use with the infinite box subwoofer. Est. cost: $50 each. Part 1. Simple satellites. Part 2. A center channel speaker for a home theater system. This unique enclosure complements a 36" TV and includes two tweeters, a midrange and a woofer. An unorthodox, easy-to-build two-way speaker features an 8" mid-woofer. Part 1. An unorthodox, easy-to-build two-way speaker features an 8" mid-woofer. Part 2. Photo shows how to make a box that will hold stereo speakers and also display plants. Unit is built of 2x2s with a recessed plywood shelf on top for plants. Framework is lined on the inside with a coarse fabric. Est. cost: $35. How to install a remote volume control for an extra set of speakers that will allow you to turn them off or adjust the volume from another room. How to install an automatic shut-off for a stereo. Build a passive radiator type of loudspeaker enclosure, called the "augmented radiator". Consists of two speakers in a box, but only one has a voice coil and magnet. The other responds passively to the pressure wave set up within the box. Est. cost: $ 20. Wall flowers. Tips on selecting and installing small in-wall loudspeakers to replace larger free-standing speaker cabinets. Amplified speaker system is useful for testing audio components or to amplify a Walkman device for room use. Est. cost: $17. Unusual base-reflex system. Miniature speaker and enclosure measure 6"x8"x8". Est. cost: $25. A small (14"x8"x8") distributed-port base-reflex system. Uses a 5" woofer and 5" tweeter. Flat response within 2 dB, from 60 cps to 15 kc. Est. cost: $15 plus cabinet. EI-8X speaker system. Bookshelf-style speaker cabinet measuring 10"x11"x22". Has an 8" woofer and a 4" tweeter. Smooth response to about 16,000 cps. Est. cost: $30. Loudspeaker is only 1-1/2" thick and looks more like a picture frame. Response from 100 to 15,000 cps. Est. cost: $25. Mini Mini Speaker. A 6"x7"x10" speaker enclosure with quite a flat response from 200 to 10,000 cps. Loudspeaker cabinet built from a cardboard shoebox using plyfoam as a strengthener. Small speaker responds from 70- to 15,000-cps. Size of enclosure is 8"x8"x14". Utilizes three high-compliance, heavy-magnet, long-excursion type speakers. Speaker enclosure made from corrugated cardboard box. Est. cost: $1. Horn-loaded bass-reflex speaker enclosure with 4 cubic feet of volume, designed to sit in the corner of a room. Uses 10 watts of driving power. Est. cost: $65. Single cabinet (utilized) stereo speaker system. Report on assembling the Acoustron LWE IV speaker system kit and an analysis of its output. Bass reflex with horn enclosures built around one of three different speakers. Est. cost: $20 to $33 each, plus wood. How do they get so much bass out of such little boxes? Overview of bookshelf speaker design. Loudspeaker power ratings. What do they mean and how to avoid problems. Part 1. Tweeter problems. Loudspeaker power ratings. What do they mean and how to avoid problems. Part 2. Midrange and woofer problems. Hints and tips on buying a speaker system. Part 1. Hints and tips on buying a speaker system. Part 2. Designing a ducted-port bass-reflex enclosure. Design and construction of small, completely sealed hi-fi speaker enclosures. A number of practical graphs are included to determine speaker compliance and achieve best enclosure size. Complete details on building an acoustic-suspension speaker system. Design for an unusual hi-fi loudspeaker system for frequencies below 64 Hz make use of vibrating side panels and slot loading. House a small speaker in a tin can. Use as an earpiece or desk speaker. Whiskey barrel speaker system. Converting a 5 or 6 gallon whiskey barrel into an enclosure for a loudspeaker. Larger barrels may be used. Build a flame speaker utilizing a propane torch. "Polar-Plus" loudspeaker enclosure features a Poly-Planer plastic speaker just 1" thick. Est. cost: $10. A 360-degree loudspeaker composed of a 5" speaker built into an ice bucket, with a dome reflector over the cone. Speaker enclosure 36" high, 24" wide and 14" deep has 9 speakers. They include one 15" woofer, four 5" high-compliance and four 3" tweeters. Est. cost: $65. Simple end table actually conceals a 3-way speaker system with downward facing woofer. Upgrade that cheapie stereo for higher fi. How to rework the speakers to improve the sound. Design and assemble your own two or three speaker enclosures with level controls and adjustable crossover network. Uses a Radio Shack enclosure kit which permits a choice of speakers and networks. Unusual loudspeaker uses a two-gallon clear glass "cookie jar" as the enclosure, and an automotive speaker grille as the jar cover. A 5" speaker completes the unit. Tips on assembling the Speakerlab 3 loudspeaker kits. Convert a bedside table (night table) kit into a quality speaker enclosure that looks and functions as a bedside table and has one drawer at the top for storage. How to build your own hi-fi speakers. Assembling speaker systems from a kit. Loudspeaker impedance. A hi-fi hassle that won't go away. What is impedance and how does it impact loudspeaker design and hi-fi systems. Baffles, boffles, boxes, and vents. Design fundamentals for loudspeaker enclosures. Speaker "Z" Tester is a simple bridge circuit that can determine the impedance of an unmarked speaker. Towers of power. Build your own loudspeakers using the double-chamber reflex design. Consists of an 8" woofer and a 1" tweeter in a tower that's 10" wide, 40" tall, 12" deep. Tip: Paint loudspeaker cases to blend into their surroundings. Installing outdoor audio speakers. Some tips. In-the-wall stereo speakers. A buyer's guide to selection and installation. How to choose speakers that will complement your audio system and your home's acoustics. Floor monitor speaker enclosure is useful for anyone who plays an electronic musical instrument. Estimated cost: $7. A full-range speaker system. Speaker enclosures of the special type of bass-reflex baffle known as a distributed port enclosure. Built of 3/4" fir plywood with fiberglass padding. Speakers are the Jensen Concert Series W-120 woofer and the TH-200 compression horn tweeter. Budget hi-fi speaker has three speakers in a wood cabinet. Frequency response of 70 to 16,000 cps. Est. cost: $20. Square topped coffee table is built from decorative moldings, plywood and particle board. It has four small loudspeakers (or one large 40-watt speaker) built into the base. Decorative tapestry print upholstery fabric, set in frames of molding, conceal the speakers. Build a low-cost speaker enclosure using an 8" woofer and a 1" dome tweeter. Uses simple lumber and involves no critical adjustments. How to hide a loudspeaker. How to mount a speaker in a closet door, a wall or ceiling. Build a sound-in-the-Round speaker. This homebuilt version of an omnidirectional enclosure built from plywood is 15" square by 26" high. How to add a tweeter system to your existing budget stereo. Uses three Lafayette 29500 speakers mounted at 60 degree angles to each other. Cabinet is shaped like half a hexagon, 12" along the back and 5" center depth. How to build a really low-cost speaker. Uses Norelco 6"x9" oval speaker. Cabinet dimensions are 17" high, 12" square. Est. cost: $7. Upgrade an inexpensive speaker enclosure by adding a high-compliance replacement speaker and some damping material. Build a true hi-fi speaker that will handle up to 20 watts. Features three drivers (one 8" woofer and two tweeters) of the air suspension type. Cabinet is particle board covered with Contact paper. Est. cost: $25. Full-range speaker system. An 8" dual-cone speaker and closed-box design handles up to 30 watts. Frequency response is 100 Hz to 18 kHz. Est. cost: $40 per pair. Subwoofer for stereo. This deep-bass speaker reaches down to 15 Hz to upgrade your present stereo system. Building and applying active minispeakers. By installing a driving amplifier inside its aluminum enclosure, you can greatly enhance a minispeaker's versatility. How to cat-proof stereo speakers. Three designs for covers that are thick enought to keep a cat's claws from penetrating and harming grille fabric. Covers are removed before listening to the system. Est. cost for six covers: $10. Putting the audio into audiovisual. Training your ears to be sound-critical. Tips on using microphones and loudspeakers. Hi-fi speaker system for $8. Flexible little system features two full-range speakers. Slim two-speaker enclosure has decompression chamber. Distributed port base reflex cabinet for a modern-day hi-fi speaker. Half-cubic foot sealed enclosure costs under $10. Unique $.99 speaker enclosure from plastic wastebasket. Stereo speaker system consisting of a column speaker containing 11 speakers (4" or 5") and a separate bass speaker enclosure containing one or two woofers. Details of cabinet construction and wiring for 8 or 16 ohm impedance. How to get good base response out of a $6 speaker without "boom". Done by constructing a cabinet which uses an acoustic resistance unit (ARU) across the open port. Build a long-tailed phase inverter. A new labyrinth-type speaker enclosure design. Quality speaker system containing four 12-watt woofers and two tweeters in a handsome cabinet. Est. cost: $40. Speaker enclosure uses 12 speakers of different sizes arranged in an irregular pattern in order to set up a "staggered resonance" condition. Est. cost: $35. Princess Cinderella. Build the up-rated version of the bookshelf hi-fi speaker originally described in the October 1965 issue. This new version uses a tweeter with a 10 oz. magnet and a woofer that has a 20 oz. magnet. Resonance is about 60 Hz. Ported enclosure. High end of 17,000 to 18,000 Hz. Est. cost: $15. Triangular-shaped loudspeaker enclosure will fit into a corner of a room. Triangular speaker enclosures are considered superior by many experts. Loudspeaker up to 5" in diameter can be mounted in a 1-gallon plastic jug to form a portable speaker enclosure. Ultra-compact hi-fi speaker enclosure uses a woofer with a 3-1/2 lb. magnet and a fundamental resonance below 45 Hz. A discussion of the theory and apparatus used in "Flame amplification". Smooth out the base response of a loudspeaker by matching the enclosure to the speaker. Instructions on how to perform the matching process. Sealed-reflex speaker system. Use of an extra speaker cone improves bass performance without using ducts or ports. Loudspeaker enclosure is 40" high, 25" wide and 19" deep. Encloses woofer, tweeter and four midrange speakers. Full-range hi-fi speaker uses an unusual 12" woofer with free-air resonance below 25Hz. A midrange speaker, tweeter, homemade crossover networks and plywood enclosure. Est. cost: $35. A 6,000-cubic inch speaker enclosure is tuned to provide the sound normally expected of a system with an 8,000 cubic inch volume. Bookshelf speaker enclosure uses tongue-and-groove method of support, no screws, and prefinished particle board. Three grades of speaker systems may be installed in the cabinet, ranging from $15 to $126. "Mini-Six", a stereo loudspeaker system that utilizes the reflected sound system and allows the listener to vary the ratio of direct/indirect sound to match room acoustics. This speaker is not a full range unit, but an add-on for existing hi-fi speakers. Building loudspeaker enclosures out of materials other than plywood. Tips on proper loudspeaker enclosure tuning of a bass reflex. Part 1. Tips on proper loudspeaker enclosure tuning of a bass reflex. Part 2. Bookshelf speakers, 8" square. Multi-directional column speaker has four woofers and four tweeters. Triangular-shaped speaker enclosure houses four speakers costing $3.50 each. Unit fits in corner of room and is only 13" high. Buck up bass response with a super woofer, a separate speaker to handle notes under 100 Hz. Loudspeaker system expert discusses pros and cons of multiple-speaker enclosures. Nomograph aids in determining reflex enclosure dimensions. Pros and cons of a third speaker, the woofer only, in a stereo system. Typical setups illustrated. The colossal woofer. A 30" diameter speaker in a 27 cubic foot cabinet. The continental speaker system features an offbeat speaker layout and European speakers. Est. cost: $85 plus cabinet. Tips on choosing a hi-fi speaker system. Labyrinth speakers for hi-fi. Some problems, solutions and advice to experimenters. Hi-fi loudspeakers: facts and fallacies. Part 1. How a speaker works. Build bass reflex enclosures the easy way. Some hints on succssful design and construction. Hi-fi loudspeakers: facts and fallacies. Part 2. Comeback of the bass reflex hi-fi speaker enclosure. A look at the five types of basic hi-fi speaker enclosures: infinite baffle, bass reflex, folded horn, folded corner horn, and acoustical suspension. Closed box speaker system design. Part 1. How to match speaker to enclosure. Closed box speaker system design. Part 2. Simplified design charts enable you to build your own speaker enclosures. Design your own bass reflex hi-fi speaker systems. Part 1. Basic principles. Design your own bass reflex hi-fi speaker systems. Part 2. Construction details. Build a large-port speaker system featuring a novel high-efficiency reflector system. Handles up to 30 watts of peak power. Case is built from 3/4" plywood or particle board. Build the "Plus 4" omnidirectional speaker system. One woofer and 4 tweeters provides good base response and open-quality high frequencies. Triangular shaped cabinet. Ten speaker-enclosure fallacies discussed. Tips on how to choose hi-fi speaker systems. What performance to look for. Special focus on speakers. Covers innovations in speaker design, interpreting speaker test results, and the inportance of power-handling capacity. Experiments with plasma acoustics shows how to make a flame speaker. Design your own loudspeakers. Three simple computer programs (written in BASIC) facilitate the process. Building a loudspeaker kit. Tips on assembling the A652 speaker kit from Madisound Speaker Components. Est. cost: $650 (pair). Design your own bass-reflex, vented-enclosure loudspeaker. Includes a Basic language computer program that accepts Thiele parameters for the system being designed. Auxiliary amplifier and speaker for transistor radios. Six speakers in one cabinet for hi-fi. Enclosure for 5" speaker provides good bass for hi-fi system. "Interflex", an unconventional speaker system that splits the music on your hi-fi records so you can pick out each instrument in the orchestra. Complete plans for a coneless loudspeaker. Responds up to 6,000 cycles. Est. cost: $4. Improve inexpensive speaker enclosures by placing washers over speaker mounting bolts between cabinet and speaker. Miniature permanent-magnet speaker made from a plastic spray can top can improve the sound from a pocket transistor radio. Test of stereo-quality loudspeakers costing under $80 dollars each. Cabinet built of birch plywood features ten feet of record storage, lots of storage for cassettes, built-in tape deck, amplifier, tuner and record player, plus matching enclosures for loudspeakers. Design can be varied to suit. Stereo sound from your walls. How to install the Acoustic 2000 AC coneless speaker that uses walls of your house as a sounding board. Build this time-compensated hi-fi speaker system. Designed so that the sounds from three drivers reach your ears simultaneously. Est. cost: $200. High performance minispeaker system to build. Two speakers fit into an 8"x4"x3" enclosure. Use also in automobile hi-fi systems. Estimated cost: $30. Build this hi-fi mini speaker. Uses the symmetrical air friction enclosure (SAFE) method to get extended bass response from small speakers. Incorporates a woofer, mid-range and tweeter speaker in a small cabinet. Build this SAFE (Symmetrical Air Friction Enclosure) sub-woofer. Provides extended base from a relatively small enclosure. Plans for an R-J design speaker enclosure for an 8" speaker. How to measure the impedance of a loudspeaker. Build a subwoofer simulator and fill your living room with movie-theater sound you can actually feel. Low-cost amplified speaker system is useful for testing audio components, or to amplify a walkman-type stereo for "ears-free" listening. Est. cost: $17. The history and theory of the dynamic loudspeaker. Cardboard shoe box serves as both the frame and cone of a homemade permanent-magnet speaker. Est. cost: $ .50. Use a dual voice coil speaker to receive signals from two different receivers. Levels can be preset so that one signal source is reproduced as a background level and the second signal comes in much louder and overrides the background signal. Either signal circuit can be shut off. Est. cost: $10. A wooden grandfather clock cabinet is actually a loudspeaker enclosure with an electric clock movement. It is constructed of 3/4" plywood. Auxiliary speakers made by placing transistor radio replacement speakers in tin cans. An 8" speaker with its own amplifier and power supply boosts the quality of sound from inexpensive, low-power cassette players, etc. Small loudspeaker enclosure consists of a 4" speaker and 1" dome tweeter mounted inside a styrofoam beverage cooler. Column speaker for your hi-fi. An ambience reproduction speaker system. Wedge-shaped speaker enclosures are equipped with a 5" full-range divider. Orienting two of them to reflect sound off the walls gives the illusion of a much larger acoustical room with six sources (two actual and four phantom). Diffraction, the true story. Effect of the acoustic phenomenon called diffraction on loudspeaker systems. A three-enclosure (multiple-driver) loudspeaker system with active delay and crossover. Sufficient information is given to duplicate the system or to improve existing systems by equalizing the low-frequency response or adding a separate woofer box. Part 1. A three-enclosure loudspeaker system with active delay and crossover. Part 2. ADDED INFO: 80301981.20 <2/1981 Thiele, Small and vented loudspeaker design. Description of the landmark work of A.N. Thiele and R.H. Small in the design of vented (bass reflex) loudspeakers. Part 1. A three-enclosure loudspeaker system. Part 3. Changes and refinements to the system. Construction tips for the Fried "C" monitor satellite and "T" transmission line subwoofer kits. Thiele, Small and vented loudspeaker design. Part 2. How you can determine design parameters for your loudspeaker. Thick as a brick. An easy acoustic suspension project. Extension speakers use a 6" driver mounted in a concrete block. Thiele, Small and vented loudspeaker design. Part 3. Fine points of vented speaker design. Build a mini-pipe speaker. A 3" full-range driver is housed in a plastic pipe fitting (4" PVC 45-degree elbow). Thiele, Small and vented loudspeaker design. Part 4. Alternative alignments. Tips on building and tuning passive radiator loudspeakers. A calculator program for Thiele-Small loudspeaker driver parameter computation. Program is for a Hewlett-Packard HP-34C. Building the Falcon Acoustic's "Monitor Quality Compact" loudspeaker kit. Thiele, Small and vented loudspeaker design. Part 5. Sixth order alignments. Simple modifications aimed at achieving maximum performance from the Dahlquist DQ-10 loudspeakers. The AR-1 rejuvenated. A way to select and modify drivers and tune the enclosure to these modified drivers which is easily repeatable by any hobbyist. A speaker builder's odyssey. Search for the ultimate home built speaker system. Part 1. A three-way corner loudspeaker system. Designed for an in-home listening environment where quality of sound is paramount and high efficiency is traded for more massive but better damped drivers, with flatter response and gentler crossover slopes with better phase response. A speaker builder's odyssey. Part 2. Tips and rules of thumb for beginning speaker builders. Thiele-Small calculator programs. Works with the TI-58, TI-59, HP-97 and HP-67. Use the program to examine the response of a particular loudspeaker driver and enclosure (vented box alignment) to see whether it will meet your performance criteria. A speaker builder's odyssey. Part 3. Report on assembling the USA 61 loudspeaker kit from Universal Sound (Florida). A speaker builder's odyssey. Part 4. Thiele-Small nomograms. How to simplify parameter measurement when designing loudspeakers. Report on assembling the Acoustical Physics Laboratories' Acoustic Image Model II loudspeaker kit. A speaker builder's odyssey. Part 5. BOXRESPONSE. An Apple BASIC computer program for the Thiele-Small models of loudspeaker design and calibration. Supplies model-based performance data for either closed or vented-box enclosures with or without the use of a first or second-order electrical high-pass filter as an active equalizer. A speaker builder's odyssey. Part 6. Loudspeakers. A beginner builds his first speaker. Loudspeakers from A to Z. How they work. Assembling the Audio Concepts' Model C loudspeaker kit. A high-power satellite/subwoofer speaker system is a two-way, three-driver design that provides substantially increased power-handling capability (110dB at any frequency above 40Hz). The curvilinear vertical array. Incorporates a push-pull bass system in a B4 alignment, three large dome midranges and two ribbon tweeters. The enclosure is a pyramid design. An Isobarik system. An overview of the theory, wiring, crossover and enclosure design to construct a typical Isobarik loudspeaker. An acoustical ambience extraction system. How to better extract the ambient information contained in stereo recordings. Systems combining three to eight speakers are shown to extract more sound than two-speaker systems. Includes tables of driver alternatives, enclosure dimensions, vented-box alignments, etc. Report on assembling the Model G loudspeaker kit from Audio Concepts. Includes modification and revision tips. Mini-dancer. A push/pull constant pressure speaker system. Report on assembling the Focal Model 280 egg-shaped loudspeaker kit. Tips on building a complete speaker system around the Strathearn driver. Includes schematic for a passive crossover. An introduction to frequency response and LMP (loudspeaker modelling program). Part 1. Phase versus frequency and magnitude versus frequency responses of filters as they relate to loudspeaker system design. An introduction to frequency response and LMP (loudspeaker modelling program). Part 2. The response step. Rapid loudspeaker design using spreadsheets. New approach to designing and simulating closed-box and vented-box loudspeaker systems. Part 1. LMP (loudspeaker modelling program), a construction example. Using LMP to design the crossover for a small two-way system. Overall dimensions: 9"x10"x18" tall. Balancing small speakers. An intriguing acoustic alternative for eliminating the "response step" which may be responsible for the "forward" sound in many small speakers. Mobile, rugged, outdoor speakers of closed-box design. Incorporates a 6"x9" coaxial driver in an 8"x9"x11" tall enclosure. Kit report on L.A. White's nonresonant loudspeaker. Incredible bass performance from a two-way design. Design is used to test the validity of Thiele bass reflex theory. Overall dimensions: 18"x14"x36" tall. Est. cost: $300/pair. Modifying Radio Shack's Minimus-7. Improve the sound by installing a new crossover and careful placement in the listening room. A high quality dome midrange/tweeter array. Using a mid-tweeter-mid (MTM) driver configuration with an "open-backed" baffle in a 12"x12"x18" enclosure. Report on E.J. Jordan USA model HRM (high resolution monitor) two-way bookshelf loudspeaker kit. Low-cost upgrade for the AR-3 speakers from Acoustic Research. Installing a new midrange, tweeter and crossover. The Swan IV speaker system. Part 1. Background and development, design criteria, crossover considerations, and driver selection. [Related article 4/1984 p7] The Swan IV speaker system. Part 2. Cabinet design and construction, final assembly and grille considerations, and room placement and listening tests. M-S speaker system. Based on the middle-side stereo miking technique, this single speaker produces stereo sound. A front driver receives the sum of the left and right channels, and the difference is sent to the rear drivers which are wired out of phase. Overall dimensions: 14"x12"x30" tall. Commercial speaker alignment by time. Tips on modifying an AR-30 Connoisseur Series loudspeaker to move the woofer forward of the tweeter. A T/S drive program. Computer program written in BASIC will make the job of determining the Thiele/Small parameters of raw drivers much easier and faster. CLOSED BOX computer program determines the response of a driver in a sealed box. Examples of using the program are included. The program must be ordered. Vintage designs. Wharfedale Airedale version of the omni-directional 3-speaker corner system (circa 1961). Audio laboratory loudspeaker system. Build a vented-box system that is fairly compact, has an extremely smooth and balanced frequency response, and is highly efficient for a home system. Est. cost: $300-$400 per pair. Equalizing the Klipsch Cornwall (circa 1980). Modification for a speaker equipped with a K-33 bass driver. Includes cabinet construction details and tuning modifications. Rehab for better kitchen music. Updating a small speaker (8"x7"x12") by installing better tweeters and a third-order crossover. The beauty of spreadsheets. Some tips on using electronic (computer) spreadsheet software to help design a loudspeaker. Practical considerations for passive radiator systems. A look at the design, construction and placement considerations which affect the sound of passive systems. Closed-box bass speaker design program (written in BASIC) allows you to investigate the closed-box loading of any driver. Tips on calculating vented-box alignments using Newton's method. Modifying the Paradigm 7se loudspeaker. Report on the new Focal Egg II two-way speaker kit which may be constructed as either a sealed or vented system. Vintage designs. Jensen Concerto-15 two-way speaker system kit (circa 1956). Minimus-7 super mod. Combine a pair of these inexpensive Radio Shack speakers into a D'Appolito configuration with an improved crossover design. Converting spherical omnidirectional speakers into vent-connected "sphere-odds" (hemispherical speaker enclosures). A small (11"x10"x17" tall) two-way acoustic suspension design loudspeaker system to produce midrange and treble with good resolution and accuracy. Helmholtz spreadsheet. Using a computer spreadsheet program to perform a number of useful variations on the basic Helmholtz vent length (resonator) formulas used in designing loudspeaker enclosures. Heresy upon a Heresy. Updating a pair of 1950's vintage Klipsch Heresy speakers to convert them into monitors for a radio studio. Beer budget window rattler. Double 12" woofer arrangement combined with two midrange drivers and one tweeter is designed to be driven at high levels by a 60-100W integrated amplifier linked to a CD player. Overall dimensions: 17"x21"x58" tall. Est. cost: $650 per pair. The MDT mini-monitor. Closed-box speaker (15"x10"x15" tall) features simple construction from MDF (medium density fiberboard). Titanium + TPX + Polypropylene = Fidelity. Speaker system features dual 10" woofer, 8" lower midrange, 5" midrange, 1" tweeter, simple construction, and per-driver cost under $40. Overall dimensions: 20"x15"x49" tall. Design tips for a three-way full D'Appolito geometry loudspeaker. A modular three-way active loudspeaker which utilizes the Linkwitz equalized fourth-order filter circuits. Each section is optimized for its function and can be changed if a new driver dictates a different design. A speaker system for CDs (compact discs). Designed for listening to music at concert hall volume in the home. Overall dimensions: 11"x17"x31" tall. Tips on using "Speaker Designer", a computerized design and modeling tool. Assembling and customizing the Pitts loudspeaker kit. Brief explanation of face-to-face (compound, Isobarik, push-pull) speaker systems. Tip on including voice coil inductance when modeling speaker designs. The wonder of a symmetrical Isobarik. Small satellite system consists of John Cockroft's Isobarik speakers in a symmetrical D'Appolito configuration. Each cabinet combines four Radio Shack 40-1022A woofers with a tweeter. | |||||||||