87:
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203:, giving musicians a more even sound field because of the single-source characteristic. As well, the enclosure may be made more compact. In the 1980s, Professional Audio Systems (PAS), using Time Alignment technology from Ed Long, sold the popular SW series of compact stage wedges, offered with a 12- or 15-inch woofer, and having a projecting high-frequency horn as in the 604. Other stage monitors using coaxial designs are made by Clair Brothers,
283:, partially obscuring it. The advantage of this design is the ability to use a smaller area, hence their popularity in car audio. The low frequency sound waves from the woofer are not reduced too much by the drivers in their path. Without time-alignment correction, the sound from the tweeter may arrive slightly before the sound from the woofer; this misalignment is not generally addressed in automobile sound systems.
140:. The Tannoy style of coaxial, with the woofer forming part of the high frequency horn, had greater intermodulation distortion. Designs similar to the Altec 604 have further problems with diffraction of the low frequencies around the central horn, and with rearward emanations from the horn body reflected forward by the woofer out of time with direct sound. All of the problems with sound waves tend to increase with
71:
196:(DSP) was used by Fulcrum Acoustic to reduce some of the coaxial drawbacks such the diffraction of the woofer's upper range around the central horn, by filling in this "shadow" with low frequency sound from the compression driver, and by countering the out-of-time reflections bouncing off of the woofer.
127:
to carry the high frequencies. The Tannoy also used a 15-inch woofer and a compression driver for high frequencies, but differed in that the woofer itself served as the final horn flare for the high frequency driver. Thus, its output pattern was radially symmetric, not just mirror-image symmetric as
250:
introduced an extension of the coaxial loudspeaker concept. Their Uni-Q driver is a coincident driver, where the two drivers share the same acoustic center and therefore are closer in time alignment. This was made possible by using the then newly affordable powerful yet small neodymium magnets for
159:
and his patented Time
Alignment crossover design to fix the long-standing problem of the two bandpasses not being aligned in time at their crossover point. The Altec 604 was given this elaborate new crossover feature and incorporated into the UREI 813 studio monitor, which also had a second woofer
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has produced coaxial loudspeakers, for the hi fidelity home consumer market since the early 1950s. Their "Dual
Concentric" drivers early series included in order of introduction: Tannoy Blacks, Tannoy Silvers, Tannoy Reds, and Tannoy Golds. Jensen introduced several coaxial speakers in the 1950s
225:
in 2013 to create the self-powered line of
Sceptre S6 and S8 coaxial studio monitors, and releasing Fulcrum's own FH15 full-range horn-loaded loudspeaker series in 2018. All of the coaxial Fulcrum designs use digital signal processing to reduce distortion modes. Fulcrum's proprietary process is
246:
including their highly regarded triaxial models. Several other manufacturers introduced coaxial speakers and drivers in the 1950s including
University, however due to their higher cost most did not last in the consumer market. In 1988,
135:
One drawback of the design is the production line difficulty in mating the two drivers, and in replacing or reconing the woofer. Another drawback is that the low frequencies tend to modulate the high frequencies, causing greater
229:
In 2015, Fluid Audio launched the FX8 studio monitor, featuring a coaxial design with the tweeter mounted directly in front of the woofer on a fixed post. The tweeter is housed in a plastic waveguide reducing
114:
have often been coaxial loudspeaker designs. In 1945 the improved Altec 604 was introduced, and it soon became the recording industry standard studio monitor in the U.S. First shown in 1947 in
England, the
98:
Coaxial loudspeakers in professional audio enable sound from two drivers to come from one source. This characteristic allows a wider field of listening to a synchronized summation of speaker drivers than
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the tweeter making the whole tweeter assembly small enough, magnet included, to fit inside the woofer's voice coil. Other home audio speaker companies making coaxial speakers include TAD,
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with their 4-way
Concentric QC-55 Driver as seen in their flagship model - La Sphère, Hsu, Vandersteen, until recently Theil, and a budget speaker made a few years ago by Insignia.
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physically separate from the coaxial pair. This design dominated recording studios of the 1980s, and time alignment became a feature of competing manufacturers. In 1977,
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the low frequency driver, and both were not initially time aligned. The high frequencies arrived at the listener's ear slightly later than the low frequencies.
94:(c. 1990) with a 12 inch (30 cm) bass driver having a second, independent 2-inch-driver for high frequencies in the center. The crossover frequency is 1.400 Hz.
82:
813s, each of which has a horn driver for high frequencies (blue rectangle) and coaxial 15-inch coaxial driver beneath it and a plain 15-inch driver above.
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system in which the individual driver units radiate sound from the same point or axis. Two general types exist: one is a compact design using two or three
507:
119:
Dual
Concentric design assumed the same role across Europe from the 1950s onward. The Altec 604 combined a 15-inch (380 mm) woofer with a
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176:'s patented high-compliance compression driver diaphragm, a higher-power woofer, and processor-controlled bi-amplification with line-level
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containing physically separated drivers. As well, the pattern of response is symmetric around the axis of the loudspeaker.
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and
Fulcrum Acoustic have designed coaxial loudspeakers beginning in 2009, notably collaborating with
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introducing a retail model the next month. This was followed by designs from
Sparkomatic,
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modified the Altec 604 for the McCune SM-4, a large proprietary stage wedge, using
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35:
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207:, Radian Audio Engineering, RCF, Beyma, dB Technologies, Fulcrum Acoustic, and
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Loudspeaker system in which the individual drivers share the same point or axis
697:
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407:
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This design was popularized in the 1970s with
Electronic Industries, Inc. of
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level, causing significant shifts in tone as the loudspeaker changes volume.
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208:
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43:
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Coaxial speakers in automobiles are 2- or 3-way loudspeakers in which the
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325:. Recording and Audio Technology. Hal Leonard Corporation. p. 92.
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601:"Fulcrum Acoustic Announces FH15 Full-Range Coaxial Horn Product Line"
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279:, or the tweeter and a mid-range driver, are mounted in front of the
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552:"Monitor Wedge Tips: Tools Of The Trade To Have A Successful Show"
456:"Modeling the Intermodulation Distortion of a Coaxial Loudspeaker"
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85:
69:
152:
79:
355:. Focal Press, Gulf Professional Publishing. pp. 514–516.
58:. The design is favored for its compactness and behavior as an
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in the Altec. Both designs placed the high frequency driver
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time alignment. The McCune SM-4 was the first multi-angle
454:
Dupont, Edward; Lipshitz, Stanley P. (September 2010).
271:
speaker with a coaxial tweeter in front of the woofer
627:"Dave Gunness: loudspeaker design comes full circle"
46:, and the other is a two-way high-power design for
184:, and was used by many McCune clients such as the
692:(25). Nielsen Business Media: 68. June 23, 1973.
508:"Time Alignment of Sound Reinforcement Equipment"
290:introducing the general concept in May 1973, and
662:(21). Nielsen Business Media: 37. May 26, 1973.
475:
473:
430:(3 ed.). Focal Press. pp. 474–476.
8:
652:"Car Speakers Hi-Fi Emphasis—Display Vital"
419:
417:
483:. Fulcrum Acoustic. 2009. Archived from
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199:Coaxial loudspeakers have been used in
7:
449:
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390:McGowan, Chris (November 15, 1980).
226:called Temporal Equalization (TQ).
106:Since the 1943 introduction of the
625:Basnicki, Erica (March 25, 2013).
427:Loudspeaker and headphone handbook
402:(46). Nielsen Business Media: 42.
322:Guide to Sound Systems for Worship
25:
90:Studio monitor loudspeaker from
575:"PreSonus Sceptre S6 & S8"
528:Harvey, Robert (August 1983).
506:Maloney, Pat (December 1980).
110:601 coaxial driver, recording
78:over the window are a pair of
1:
550:Frink, Mark (April 7, 2011).
605:Lighting and Sound (America)
352:Handbook for Sound Engineers
56:dual-concentric loudspeakers
515:Recording Engineer Producer
458:. Audio Engineering Society
734:
232:intermodulation distortion
138:intermodulation distortion
573:White, Paul (July 2014).
194:digital signal processing
481:"Building a Better Coax"
631:Pro Sound News (Europe)
288:South Holland, Illinois
718:Loudspeaker technology
599:Staff (May 23, 2018).
424:Borwick, John (2001).
319:Eiche, Jon F. (1990).
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213:Eastern Acoustic Works
190:Monterey Jazz Festival
101:loudspeaker enclosures
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83:
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186:Playboy Jazz Festival
89:
73:
211:in partnership with
108:Altec Lansing Duplex
530:"The Venerable 604"
292:Jensen Loudspeakers
147:In the late 1970s,
32:coaxial loudspeaker
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121:compression driver
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66:Professional audio
60:audio point source
48:professional audio
487:on March 23, 2012
16:(Redirected from
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192:. In the 2000s,
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153:Universal Audio
112:studio monitors
76:studio monitors
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682:"Car Stereo"
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634:. Retrieved
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608:. Retrieved
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582:. Retrieved
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556:. Retrieved
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489:. Retrieved
485:the original
460:. Retrieved
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378:Altec Duplex
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347:Ballou, Glen
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302:and others.
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166:McCune Sound
155:worked with
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205:L-Acoustics
149:Bill Putnam
36:loudspeaker
306:References
238:Home audio
174:John Meyer
698:0006-2510
686:Billboard
668:0006-2510
656:Billboard
408:0006-2510
396:Billboard
269:car audio
259:Car audio
209:Rat Sound
162:Bob Cavin
44:car audio
712:Category
636:July 22,
610:July 22,
584:July 22,
349:(2005).
300:Infinity
223:PreSonus
188:and the
178:all-pass
296:Clarion
277:tweeter
253:Cabasse
157:Ed Long
696:
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558:May 1,
491:May 1,
462:May 1,
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406:
359:
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281:woofer
243:Tannoy
130:behind
117:Tannoy
92:Tannoy
533:(PDF)
511:(PDF)
34:is a
694:ISSN
664:ISSN
638:2020
612:2020
586:2020
560:2011
493:2011
464:2011
432:ISBN
404:ISSN
357:ISBN
327:ISBN
125:horn
80:UREI
74:The
248:KEF
234:..
168:in
164:of
151:of
54:or
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472:^
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267:A
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30:A
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