Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.

Transmission line speaker. How to build the enclosure and choose the drivers.
AUDIO AMATEUR 1/1973 [Dec 1973] (v.4#1) pg. 3
Added Info AUDIO AMATEUR 1/1974 [Oct 1974] (v.5#1) pg. 32

A jolly transmission line giant. (1) A split tube transmission line enclosure optimized for a 24" woofer. Overall dimensions: 48"x20"x54" tall. (2) A two tube vertical transmission line enclosure with dimensions optimized for an 18" woofer. Overall dimensions: 24"x24"x60" tall.
AUDIO AMATEUR 4/1973 [Aug 1974] (v.4#4) pg. 10

A proven transmission line speaker. The enclosure is built from high-density particle board and encloses a super tweeter, tweeter, midrange and bass drive units. Overall dimensions: 14"x18"x42" tall.
AUDIO AMATEUR 1/1975 [Jun 1975] (v.6#1) pg. 3
Added Info AUDIO AMATEUR 3/1975 [Jan 1976] (v.6#3) pg. 42
Added Info AUDIO AMATEUR 2/1976 [Jul 1976] (v.7#2) pg. 42
Correction AUDIO AMATEUR 3/1977 [Aug 1977] (v.8#3) pg. 49
Correction AUDIO AMATEUR 4/1977 [Dec 1977] (v.8#4) pg. 52
Correction AUDIO AMATEUR 3/1978 [Sep 1978] (v.9#3) pg. 57
Correction AUDIO AMATEUR 3/1979 [Jul 1979] (v.10#3) pg. 57

Big bass box. A large speaker enclosure (48" wide, 24" deep, 72" tall) incorporates a 12-ft. tapered transmission line and a 24" diameter Hartley driver. An active crossover circuit has adjustable gain and equalized response. Produces clean sound in the 20-40 Hz range.
AUDIO AMATEUR 2/1978 [Jun 1978] (v.9#2) pg. 4

Transmission line enclosure construction tips.
AUDIO AMATEUR 4/1978 [Nov 1978] (v.9#4) pg. 44

Electrostatic odyssey. Construction of a hybrid electrostatic/transmission line speaker. Highlights of an audiophile's lifelong journey for quality sound.
AUDIOXPRESS Aug 2001 (v.32#8) pg. 40

THOR. A D'Appolito transmission line speaker. Professional design features state-of-the-art Excel drivers.
AUDIOXPRESS May 2002 (v.33#5) pg. 8
Correction AUDIOXPRESS Jul 2002 (v.33#7) pg. 66 (Enclosure layout design & cutting guide)
Added Info AUDIOXPRESS Sep 2002 (v.33#9) pg. 14 (Step-by-step through the construction)
Added Info AUDIOXPRESS Jan 2003 (v.34#1) pg. 64
Added Info AUDIOXPRESS Feb 2003 (v.34#2) pg. 60
Added Info AUDIOXPRESS Oct 2003 (v.34#10) pg. 63
Added Info AUDIOXPRESS May 2003 (v.34#5) pg. 60
Added Info AUDIOXPRESS Aug 2003 (v.34#8) pg. 58 (Restyled towers)

An against the wall speaker. Pursuing the design of a thin transmission line and bass speaker with an enclosure depth of 4" or less.
AUDIOXPRESS Dec 2002 (v.33#12) pg. 24

A small reflex transmission line enclosure is built from Sonotube material.
AUDIOXPRESS Mar 2003 (v.34#3) pg. 6

The legend of El Pipe-O. This unique speaker consists of very large woofers mated to large cylindrical transmission lines. The cylindrical enclosures are made from "Sonotube".
AUDIOXPRESS May 2003 (v.34#5) pg. 22

Alpha transmission lines. Using Thiele/Small parameters to design a reliable alpha transmission line speaker.
AUDIOXPRESS Aug 2003 (v.34#8) pg. 34

Kapellmeister transmission-line loudspeaker enclosures are built from wood and ceramic tile.
ELECTRONICS EXPERIMENTERS HANDBOOK 1996 pg. 69

The GA bottle baby. A high-efficiency hybrid transmission-line loudspeaker that is specifically designed to interface with audio tube amplifiers. This first cousin to the Super Simpline also leans against the wall and operates with the minuscule-powered, single-ended triode amplifiers that are populer today.
GLASS AUDIO 1/1998 (v.10#1) pg. 22

Transmission line loudspeakers (enclosure). Part 1. Theory.
SPEAKER BUILDER 1/1982 [Feb 1982] (v.3#1) pg. 7
Added Info SPEAKER BUILDER 2/1982 [May 1982] (v.3#2) pg. 39
Added Info SPEAKER BUILDER 3/1982 [Oct 1982] (v.3#3) pg. 40, 41
Added Info SPEAKER BUILDER 2/1988 [Apr 1988] (v.9#2) pg. 48

Transmission line loudspeakers (enclosure). Part 2. Application. Construction of three different enclosures incorporating an 10", 8", or 5" woofer. (A survey of drivers available to speaker builders are included among the following ADDED INFO references).
SPEAKER BUILDER 2/1982 [May 1982] (v.3#2) pg. 24
Added Info SPEAKER BUILDER 3/1982 [Oct 1982] (v.3#3) pg. 40
Added Info SPEAKER BUILDER 4/1982 [Feb 1983] (v.3#4) pg. 38
Added Info SPEAKER BUILDER 3/1984 [Aug 1984] (v.5#3) pg. 37
Added Info SPEAKER BUILDER 2/1985 [May 1985] (v.6#2) pg. 40
Added Info SPEAKER BUILDER 2/1986 [May 1986] (v.7#2) pg. 32
Added Info SPEAKER BUILDER 4/1986 [Oct 1986] (v.7#4) pg. 45
Added Info SPEAKER BUILDER 3/1987 [Aug 1987] (v.8#3) pg. 47, 64
Added Info SPEAKER BUILDER 4/1987 [Dec 1987] (v.8#4) pg. 51
Added Info SPEAKER BUILDER 2/1988 [Apr 1988] (v.9#2) pg. 47
Added Info SPEAKER BUILDER 6/1988 [Nov 1988] (v.9#6) pg. 71
Added Info SPEAKER BUILDER 6/1989 [Nov 1989] (v.10#6) pg. 63

Technique for preparing and installing wool batting in a transmission line bass enclosure.
SPEAKER BUILDER 2/1982 [May 1982] (v.3#2) pg. 33

Simple technique for preparing wool used to damp transmission line enclosures.
SPEAKER BUILDER 2/1984 [Jun 1984] (v.5#2) pg. 32

A compact transmission-line subwoofer enclosure is make of particle board and incorporates a Speakerlab W848P driver.
SPEAKER BUILDER 1/1985 [Feb 1985] (v.6#1) pg. 6
Added Info SPEAKER BUILDER 3/1985 [Aug 1985] (v.6#3) pg. 49
Added Info SPEAKER BUILDER 1/1988 [Jan 1988] (v.9#1) pg. 58
Added Info SPEAKER BUILDER 6/1990 [Nov 1990] (v.11#6) pg. 73

An experimental transmission line enclosure is used to determine the correct length for three different drivers.
SPEAKER BUILDER 4/1985 [Nov 1985] (v.6#4) pg. 9

2x4 transmission line enclosure combines two columns (1 of drivers and 1 of transmission line ports) with four transmission lines (one for each woofer). Uses 4" drivers. Overall dimensions: 18"x12"x20" tall.
SPEAKER BUILDER 2/1986 [May 1986] (v.7#2) pg. 9
Added Info SPEAKER BUILDER 1/1987 [Jan 1987] (v.8#1) pg. 52
Added Info SPEAKER BUILDER 4/1987 [Dec 1987] (v.8#4) pg. 53

Plans for a modified B.J. Webb transmission line speaker enclosure for use with the RTR ESR-6 power supply.
SPEAKER BUILDER 2/1986 [May 1986] (v.7#2) pg. 42

Computer program (BASIC) calculates transmission line lengths for frequencies between 20 and 60Hz.
SPEAKER BUILDER 3/1986 [Aug 1986] (v.7#3) pg. 29

A more compact transmission line subwoofer enclosure. Overall dimensions: 21"x21"x29" tall.
SPEAKER BUILDER 1/1987 [Jan 1987] (v.8#1) pg. 9
Added Info SPEAKER BUILDER 3/1987 [Aug 1987] (v.8#3) pg. 58
Added Info SPEAKER BUILDER 1/1988 [Jan 1988] (v.9#1) pg. 51, 58
Added Info SPEAKER BUILDER 5/1988 [Sep 1988] (v.9#5) pg. 62
Added Info SPEAKER BUILDER 5/1992 [Sep 1992] (v.13#5) pg. 60
Added Info SPEAKER BUILDER 2/1994 [Mar 1994] (v.15#2) pg. 69

Octaline. A small transmission line speaker is stuffed with cotton batts and polyester fiberfill.
SPEAKER BUILDER 3/1987 [Aug 1987] (v.8#3) pg. 9
Correction SPEAKER BUILDER 4/1987 [Dec 1987] (v.8#4) pg. 50
Correction SPEAKER BUILDER 1/1988 [Jan 1988] (v.9#1) pg. 48
Added Info SPEAKER BUILDER 2/1988 [Apr 1988] (v.9#2) pg. 45, 52
Added Info SPEAKER BUILDER 4/1988 [Jul 1988] (v.9#4) pg. 52
Added Info SPEAKER BUILDER 6/1988 [Nov 1988] (v.9#6) pg. 70
Added Info SPEAKER BUILDER 2/1989 [Mar 1989] (v.10#2) pg. 64
Added Info SPEAKER BUILDER 4/1989 [Jul 1989] (v.10#4) pg. 74
Added Info SPEAKER BUILDER 2/1993 [Mar 1993] (v.14#2) pg. 74

The Shortline. A hybrid transmission line designed to compete directly with typical box systems. Overall dimensions: 12"x12"x38" tall.
SPEAKER BUILDER 1/1988 [Jan 1988] (v.9#1) pg. 18
Added Info SPEAKER BUILDER 4/1988 [Jul 1988] (v.9#4) pg. 57
Added Info SPEAKER BUILDER 2/1989 [Mar 1989] (v.10#2) pg. 63, 65
Added Info SPEAKER BUILDER 6/1989 [Nov 1989] (v.10#6) pg. 74
Added Info SPEAKER BUILDER 2/1990 [Apr 1990] (v.11#2) pg. 58
Added Info SPEAKER BUILDER 3/1990 [Jun 1990] (v.11#3) pg. 81
Added Info SPEAKER BUILDER 5/1990 [Sep 1990] (v.11#5) pg. 87
Added Info SPEAKER BUILDER 2/1993 [Mar 1993] (v.14#2) pg. 74

The Unline. Designing shorter transmission lines for small listening rooms.
SPEAKER BUILDER 4/1988 [Jul 1988] (v.9#4) pg. 28
Correction SPEAKER BUILDER 5/1988 [Sep 1988] (v.9#5) pg. 55
Added Info SPEAKER BUILDER 3/1989 [May 1989] (v.10#3) pg. 65
Correction SPEAKER BUILDER 2/1990 [Apr 1990] (v.11#2) pg. 3
Added Info SPEAKER BUILDER 2/1990 [Apr 1990] (v.11#2) pg. 67
Added Info SPEAKER BUILDER 3/1990 [Jun 1990] (v.11#3) pg. 81

Symmetrical speaker system with dual transmission lines. Part 1. (1) Enclosure design and construction. (2) Transmission line measurement and theory.
SPEAKER BUILDER 5/1989 [Sep 1989] (v.10#5) pg. 10
Added Info SPEAKER BUILDER 2/1990 [Apr 1990] (v.11#2) pg. 72
Added Info SPEAKER BUILDER 4/1991 [Aug 1991] (v.12#4) pg. 80

Microline. A simplified, shortened version of the Octaline. This hybrid uses a larger cross section and higher density than the classic transmission line.
SPEAKER BUILDER 5/1989 [Sep 1989] (v.10#5) pg. 28
Added Info SPEAKER BUILDER 3/1990 [Jun 1990] (v.11#3) pg. 81
Added Info SPEAKER BUILDER 2/1993 [Mar 1993] (v.14#2) pg. 74

U-shaped transmission line speaker enclosure is made from 6" PVC pipe.
SPEAKER BUILDER 5/1989 [Sep 1989] (v.10#5) pg. 51
Added Info SPEAKER BUILDER 4/2000 [Jun 2000] (v.21#4) pg. 47

Symmetrical speaker system with dual transmission lines. Part 2. (1) Electronic crossover design. (2) Adjustments and listening tests.
SPEAKER BUILDER 6/1989 [Nov 1989] (v.10#6) pg. 32

Cylindrical symmetric guitar TLs (transmission line loudspeakers). Build a giant pair of stereo speakers designed specifically for a bass guitar.
SPEAKER BUILDER 1/1990 [Feb 1990] (v.11#1) pg. 22
Added Info SPEAKER BUILDER 3/1990 [Jun 1990] (v.11#3) pg. 79
Added Info SPEAKER BUILDER 4/1990 [Aug 1990] (v.11#4) pg. 82, 86

Tips on D'Appolito configuration transmission line loudspeakers.
SPEAKER BUILDER 1/1990 [Feb 1990] (v.11#1) pg. 54

Tips on building a transmission line speaker based on John Cockroft's "Shortline" calculations.
SPEAKER BUILDER 2/1990 [Apr 1990] (v.11#2) pg. 67

A pair of transmission line (TL) speakers suitable for an apartment prevent the bass from propagating through the walls and floors. Est. cost: $175.
SPEAKER BUILDER 1/1991 [Feb 1991] (v.12#1) pg. 32

The Pipes. Unusual looking transmission line speakers are made from 4" diameter PVC plumbing pipe.
SPEAKER BUILDER 2/1991 [Apr 1991] (v.12#2) pg. 18

Octaline meets D'Appolito. Short transmission line speaker design features two woofers and one tweeter located at ear level and a first-order crossover. Overall enclosure dimensions: 12"x10"x48" tall.
SPEAKER BUILDER 2/1991 [Apr 1991] (v.12#2) pg. 38
Added Info SPEAKER BUILDER 4/1991 [Aug 1991] (v.12#4) pg. 77

Optimizing transmission line lengths. Math equations deal with the relationship between stuffing density and line length.
SPEAKER BUILDER 4/1991 [Aug 1991] (v.12#4) pg. 30

Fibrous tangle effects on accoustical transmission lines (TLs). An investigation into the effects of the accoustical absorbant fiber material stuffing used in TL enclosures. How it affects attenuation, the speed of sound, and system performance.
SPEAKER BUILDER 5/1991 [Oct 1991] (v.12#5) pg. 11
Added Info SPEAKER BUILDER 2/1994 [Mar 1994] (v.15#2) pg. 58

Transmission line speaker evaluation. Two neoclassic designs compared. Includes evaluation techniques, construction tips, etc.
SPEAKER BUILDER 6/1991 [Dec 1991] (v.12#6) pg. 18

A prize-winning three-way transmission line. Design and construction of a system with a cabinet 42" tall, 10" wide, and 14" deep. Part 1. Design considerations and tradeoffs.
SPEAKER BUILDER 4/1992 [Jul 1992] (v.13#4) pg. 10
Added Info SPEAKER BUILDER 3/1993 [May 1993] (v.14#3) pg. 68

A prize-winning three-way transmission line. Part 2. Cutting diagram and enclosure assembly.
SPEAKER BUILDER 5/1992 [Sep 1992] (v.13#5) pg. 22

A prize-winning three-way transmission line. Part 3. Hardware mounting, cabinet assembly, and finishing.
SPEAKER BUILDER 1/1993 [Jan 1993] (v.14#1) pg. 44

The Simpline. Step-by-step instructions for constructing a short, high-density transmission line speaker which leans against a wall while in use.
SPEAKER BUILDER 2/1993 [Mar 1993] (v.14#2) pg. 14
Correction SPEAKER BUILDER 3/1993 [May 1993] (v.14#3) pg. 65
Added Info SPEAKER BUILDER 4/1993 [Jul 1993] (v.14#4) pg. 80
Added Info SPEAKER BUILDER 1/1994 [Jan 1994] (v.15#1) pg. 62
Added Info SPEAKER BUILDER 6/1995 [Sep 1995] (v.16#6) pg. 56
Added Info SPEAKER BUILDER 8/1995 [Dec 1995] (v.16#8) pg. 58
Added Info SPEAKER BUILDER 1/1996 [Feb 1996] (v.17#1) pg. 18
Correction SPEAKER BUILDER 2/1996 [Apr 1996] (v.17#2) pg. 51
Added Info SPEAKER BUILDER 4/1996 [Jul 1996] (v.17#4) pg. 56

A transmission line woofer uses a 15" dual voice-coil driver inside a 17"x17"x49" tall enclosure.
SPEAKER BUILDER 7/1994 [Oct 1994] (v.15#7) pg. 10

The Freeline, an open-pipe transmission line. Build a simple transmission line configuration speaker with both ends open to reduce pressure variations and spread out resonances inherent in the line design.
SPEAKER BUILDER 5/1995 [Jul 1995] (v.16#5) pg. 8
Added Info SPEAKER BUILDER 8/1995 [Dec 1995] (v.16#8) pg. 57
Added Info SPEAKER BUILDER 1/1997 [Feb 1997] (v.18#1) pg. 39
Added Info SPEAKER BUILDER 2/1997 [Mar 1997] (v.18#2) pg. 54
Added Info SPEAKER BUILDER 3/1997 [May 1997] (v.18#3) pg. 54
Added Info SPEAKER BUILDER 5/1997 [Aug 1997] (v.18#5) pg. 53

Design a three-way transmission-line speaker using both PC AudioLab and Bullock's TLBOXMODEL computer software. Part 1. Theoretical and measured response.
SPEAKER BUILDER 8/1995 [Dec 1995] (v.16#8) pg. 22

Design a three-way transmission-line speaker using both PC AudioLab and Bullock's TLBOXMODEL computer software. Part 2. Design and construction of the power supplies, power amplifiers, and electronic crossovers. Also, measured responses of midrange and tweeter.
SPEAKER BUILDER 2/1996 [Apr 1996] (v.17#2) pg. 12

T-REX. A quarter-wavelength reflex transmission line loudspeaker. A look at what goes on inside a pipe and construction of an unorthodox design.
SPEAKER BUILDER 4/1996 [Jul 1996] (v.17#4) pg. 8

The B-line. This transmission line speaker uses an inexpensive 6.5" woofer. The cabinet is constructed of particleboard shelving and stuffed with polyester fiberfill.
SPEAKER BUILDER 1/1998 [Jan 1998] (v.19#1) pg. 8
Added Info SPEAKER BUILDER 3/1999 [May 1999] (v.20#3) pg. 51

Another look at TL design. Build a pair of transmission-line speakers with a detailed, musical sound well-suited for CD player, FM broadcast, VCR movies, and TV.
SPEAKER BUILDER 3/1999 [May 1999] (v.20#3) pg. 28
Added Info SPEAKER BUILDER 5/1999 [Aug 1999] (v.20#5) pg. 49
Added Info SPEAKER BUILDER 7/1999 [Nov 1999] (v.20#7) pg. 51
Added Info AUDIOXPRESS Feb 2001 (v.32#2) pg. 28 (Design changes)

Transmission lines. A three-part series that takes a close look at transmission-line design. Part 1. Characteristics and history of the development of these low-resonant, labyrinthine enclosure designs.
SPEAKER BUILDER 6/1999 [Sep 1999] (v.20#6) pg. 20
Added Info SPEAKER BUILDER 8/1999 [Dec 1999] (v.20#8) pg. 53
Added Info SPEAKER BUILDER 1/2000 [Feb 2000] (v.21#1) pg. 48

Transmission lines. Part 2. Driver response and the factors that affect performance in a TL system.
SPEAKER BUILDER 7/1999 [Nov 1999] (v.20#7) pg. 18
Correction SPEAKER BUILDER 1/2000 [Feb 2000] (v.21#1) pg. 45

Transmission lines. Part 3. Characteristics of the fiber mass used in a TL as it affects optimization.
SPEAKER BUILDER 1/2000 [Feb 2000] (v.21#1) pg. 24

Transmission lines updated. Research on pipe configuration and stuffing material. Part 1.
SPEAKER BUILDER 2/2000 [Apr 2000] (v.21#2) pg. 24
Added Info SPEAKER BUILDER 5/2000 [Aug 2000] (v.21#5) pg. 49

Transmission lines updated. Part 2. Stuffing characteristics.
SPEAKER BUILDER 3/2000 [May 2000] (v.21#3) pg. 14

Transmission lines updated. Part 3. Pipe geometry and optimized alignments.
SPEAKER BUILDER 4/2000 [Jun 2000] (v.21#4) pg. 24

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