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TECH TRUEXTENT in Radian 950PB BeX™ Be4016

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Driver TRUEXTENT Compression

TECH BRIEF

950PB compresin the Radian ustics Engineer Be4008 and Be4016 Sr. Electro-Aco ce of the Truextent one product. the high performan combination as, effectively, this have been noticing to sell Let e Math! both mounted in a Your Ears DoandTh Forks: r has even decided Radian’s 1245-16, Recently, our customers distributoTuning driver Be4016 European the compression s: the Truextent the sion driver. One Chamber with e is ~0.5m from ce of two diaphragm Truextent Acoustic Test performan Engineer the microphon Electro-Acoustics in the J. Andrews, Sr. taken will compare the Peter (log sweep), and All curves are This Tech Brief for electro-acoustic transducers, it is a 1Vrms sine chirp compression driver. is driven with engineers that beryllium is the lightest and stiffest metal versions. are aware 8-ohm diaphragm in red,metals from a theoretical discussion Radian 950PB-16 many audiophiles and Each While is shown ‘lightweight’ common has over other it beryllium diaphragm be expected comparing JBL 2386 horn. advantages would mounted on a not easy to grasp the vast performance ed. The we perhaps ey show that to the exact same dimensions; one made of Similar results . tuning three unsmooth throat. machined and demonstration,published datasheets Th forksisn’t ve)audible an easily (12th-octa paper 1. For compression driver see in you had a chance like our whitesmoothed there these at a recent trade show demonstration. ‘ping’ think one mightWe hope of what might evento responses, bothone of titanium, of beryllium. tiveone and on-axis frequency aluminum, (left) are representa the same level. A casual observer (beryllium shows curves range Metal Matrix First we show Genuine critical 2-10kHz range at roughly in blue. The smoothed AlBeMet®   and flatter response in the  Composite  the aluminum the same frequency Properties Beryllium s cover roughly higher output except for the both diaphragm two the between Response; no smoothing much difference FrequencyProperties Physical +3dB near 5kHz). 2.90 2.10 1/12th-oct smoothed 1.85 3 ȡ Density @ 25°C, g/cm Frequency Response; 13.4 13.9 11.5 Į CTE @ 25°C, ppm/°C 130 210 216 W/m·K Ȝ Thermal Conductivity @ 25°C, 0.800 1.56 1.925       feeling much heavier in the difference in weight, with the titanium is forks three the up picking when nitely 3 The first thing you might notice at 4.50g/cm . The aluminum fork is defi of course, has a relatively high density, 3 our example tuning forks are: your hands compared to the other two. Titanium, Properties that, only 1.85g/cm . The actual masses of 3 Mechanical even lighter than lighter, at 2.70g/cm , and the beryllium fork 570 413 370 MPa UTS Ultimate Tensile Strength, Aluminum Fork = 55.7 g (2.0 oz.) 480 314 240 oz.) Titanium Fork = 93.7 g (3.3 YS Yield Strength, MPa 140 193 Beryllium Fork = 38.5 g (1.4 oz.) high-frequency 310 and dips, in the E Young’s sharp peaksGPa (blue) orModulus, pitch (roughly C5) when struck on a diaphragm like noise,and the same 0.30 ring at nearly titanium e aluminum 0.17 . Thforks the aluminum 0.032 that looks noticeofiswhat because might dense modal stiffer than aluminum, it is withtitanium to read e next thing you Th is ~1.6x of the diaphragm Ratio though 20kHz, Ȟ Poisson’s E6). overEven are a bit harder the beryllium higher pitch (roughlyto break-up modes higher 6,948 ed curves (right) hardbut surface, densely packed rings at a much(red) remains smooth 9,656 1 which ratherbut predicted ~2.4x materials. 12,945 The unsmooth ,m/sec the same paperin both of Sound, essentiallydiaphragm this is not noise, white Speed frequency the beryllium c resonant ~1.7x heavier, also whereasgiving work done in our region. Of course, ~10kHz, the theoretical behavior above clearly shows this around 23kHz. This agrees with at (impulse response) break-up starting time-domain response this behavior, the onset of break-up. hide to smoothed (and usually is) response can be Truextent and AlBeMet are registered MATERION CORPORATION While the frequency of what’s happening. ELECTROFUSION trademarks of Materion Brush Inc. www.materion.com/electrofusion view 44036 South Grimmer Boulevard gives us a clearer

Peter J. Andrews,

ION ELECTROFUS Grimmer Boulevard 44036 South 94538-6346 Fremont, CA +1 510.661.9755

[email protected]

Fremont, CA 94538-6346 +1 510.661.9755 CORPORATION MATERION ent [email protected]

www.materio

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aterion.com

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ELECTROFUSION 44036 South Grimmer Boulevard Fremont, CA 94538-6346 +1 510.661.9755

[email protected]

MATERION CORPORATION

www.materion.com/truextent

Magnesium

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09/2013

pure power.

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DECEMBER 2013

3RUWXJDO João Martins +31 (0)46 4389444 [email protected]

ISSN 1521-091X

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TEAMWORK

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TECHNOLOGY

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INVENTION

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LISTEN

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ACOUSTICS & SENSORS

Loudspeakers Microphones Drivers Global Audio Components supplier to OEMs worldwide. Largest selection off-the-shelf micro-speaker designs for hand held devices.

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Parts Express is proud to announce Yung’s superbly engineered subwoofer plate amplifier line. Capable of operating at 100% power output for an 8-hour period, these new low profile designs deliver audiophile performance—even when subjected to the strenuous demands found in commercial environments. Yung International Inc. has supplied components for over twenty five years and is the preferred choice of leading loudspeaker brands worldwide.                                                        !      Visit parts-express.com/yung for more information or visit Yung’s CES booth, Venetian 72323 Exclusive Distributor:

725 Pleasant Valley Dr.  "#$&'(( Tel: 800-338-0531



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65 Years of Designing and Manufacturing Home Audio Loudspeakers MISCO COMPONENTS Home Audio Woofers & Sub-Woofers: 6.5” to 12”. A wide variety of cone materials from engineered pulps to polypropylene, carbon fiber or Kevlar. Phase plugs and faraday rings available for low inductance and distortion.



For The Sound You Want! We work with you to address every aspect of your speakers



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7iÊ>ÃœÊV>˜Ê`iÈ}˜Ê>˜`Ê manufacture amplification to drive your speakers iÈ}˜i`Ê>˜`Ê>˜Õv>VÌÕÀi`Ê in the USA - "ʅœ“iÊ>Õ`ˆœÊ loudspeakers – from decades of experience

Pro Audio Woofers & Sub-Woofers: 8” to 21” with voice coils as large as 4” for 1000+ watts of power handling. Baskets made of stamped steel, die cast aluminum with custom finishes. Mid-Range Speakers: High efficiency and smooth response, low distortion and low inductance with cone materials of carbon fiber, engineered pulps. Tweeters: Various sizes, magnetic materials & dome materials such as: Silk, Titanium and PEI. Amplifiers: MISCO builds custom class “D” amps with and without DSP to suit your specific need and application.

LC62W-8A

LC62RW-8A

LC8W-7B

OC12LPW-8A

ROC12W-8B

OOC12WF-4-4B

WC21W-4A

QC12W-8A

LC8C-6A

KC4MB-8C

KC4C-8C

M-812687

PCB-21AMP-2

GPA-221

Toll-Free: 800-276-9955 E-mail: [email protected] Web: miscospeakers.com

2637 32nd Avenue South, Minneapolis MN 55406-1641

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Setting the standard for high performance anechoic chambers for more than five decades . . .

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ECKEL

ANECHOIC CHAMBERS • for product testing • for research studies

...providing the necesary acoustic environment for obtaining reliable, precise measurements Building on a tradition of excellence and innovation in acoustic test facilities, Eckel now offers an expanded range of quality-engineered anechoic chambers and hemi-anechoic chambers to meet virtually any testing range requirements — with low frequency cutoffs down to 40 Hz . . . and any testing space needs — from small, standard portable enclosures to the largest, customengineered double-walled acoustic structures. Eckel’s modular attenuating structures have guaranteed performance and incorporate numerous state-of-the-art features: • choice of four types of wedge linings, including the EMW perforated metallic anechoic wedge which combines outstanding performance, long-term acoustic integrity, and light weight • special track system for efficient installation of wedges • unique cable floor system • sound attenuating doors • instrumentation sleeves

and supports • ventilation • lighting and power systems. All of Eckel’s acoustic test facilities meet ISO and ANSI standards and provide cost-effective solutions to achieving a superb environment for research in acoustics and psycho-acoustics, as well as for acoustic testing in fields such as audio, appliances, computers, industrial components, and consumer electronics. And Eckel offers integrated design and engineering services and turnkey capability.

For full details, contact:

ECKEL INDUSTRIES, INC., Acoustic Division 155 Fawcett Street, Cambridge, MA 02138 Tel: 617-491-3221 • e-mail: [email protected] '(&(0%(5 

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Power Connectors and Cord Sets

SCHURTER's V-Lock cord retaining system is easy, safe and cost effective. - wide range of international plugs - hundreds of V-Lock compatible inlets, outlets and power entry modules with or without filters (shown with KEA power entry module and extra-safe fusedrawer with integrated 2-pole circuit protection)

- ideal for IT, audio and medical equipment where cord retention is required - cUL and ENEC approved schurterinc.com/new_PEMS v-lock.schurter.com

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ISO9001:2008 Quality Management System Sanoway ‘s mother company started in Hong Kong in 1993 and we started to manufacture OEM / ODM speaker systems in 2001 in our own 150,000 sq. foot factory located in Shenzhen, China. We have the latest production equipment such as a 2D, 3D CNC center etc., and testing equipment such as RoHS testing machine, Clio system, etc. Our experienced engineer from Canada helps in developing and manufacturing the driver units and electronics. We supply customers with turnkey speaker system solutions that include PVC wrapping, laminated real wood veneer, and PU and PE lacquer —all in strict accordance with the ISO9001:2000 and ISO9001:2008 quality management system. We ensure on-time delivery, good quality, and reasonable pricing to customers, worldwide!

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Panasonic, 4900 George McVay Drive, Suite C, McAllen, TX 78503 Fax: (956) 984-3729 Email: [email protected] PIDCA is an Equal Opportunities Employer '(&(0%(5



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Vance Dickason Consulting has been developing award winning products for numerous high profile brand names for over 20 years… experience that’s hard to find! Add to that an available design team that includes some of the best transducers engineers, industrial designers and marketing experts I know of in the industry and you have a winning combination that would cost well over $750,000 a year to keep in house. With extensive experience in high-end off-wall, in-wall, on-wall, ceiling and subwoofer products plus close relationships with some of the worlds best speaker OEM’s and you have a combination of services that will accelerate your next product lineup.



We have all the best toys (Klippel, LEAP 5, LMS, CLIO, MLSSA, LSPCad, FEA), so whether its multimedia, car audio, MI, Pro, two-channel or Home Theater (including THX®), VDC has the solutions.

Tel: (503) 557-0427 !24



Loudspeaker Product Development

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is looking for candidates who are committed to quality and customer satisfaction for the following position at our Farmington Hills, MI location.

ELECTRONIC CIRCUIT DESIGN ENGINEER Panasonic Industrial Devices Corporation of America is a leader in Active Noise Cancellation (ANC) technology. We have a Circuit Design Engineer opening in our Farmington Hills office. This person will help design electronic circuits and software for our ANC and amplifier products. Responsibilities will include coordinating with customer engineers and vendors concerning specifications for electronic circuit modifications and new designs to meet customer requirements, ANC tuning and system verification. Other duties include maintaining product quality, minimizing production costs, and preparing project progress schedules and reports to show current status of programs. Requirements are a Bachelor’s degree in Electrical or Electronic Engineering and two years of automotive experience in electronic circuitry design and experience in automotive parts development. Please e-mail, fax, or send resume and salary requirement to:

Panasonic, 4900 George McVay Drive, Suite C, McAllen, TX 78503 Fax: (956) 984-3729 Email: [email protected] PIDCA is an Equal Opportunities Employer '(&(0%(5



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Superior Dispensing Solutions for Loudspeaker Assembly

Voice Coils Surrounds

Improve speaker quality, Magnet Assemblies speed up throughput and Spiders produce fewer rejects Speaker Cones Dust Caps For more information go to www.nordsonefd.com/speaker 401.431.7000 800.556.3484

We’re thinking small

Seems like all of a sudden, compact arrays are big business. So talk to Celestion about our range of high performance, small-format drivers.

AN2075 50mm/2"

AN2775 70mm/2.75"

AN3510 88mm/3.5"

It’s another innovation in sound from Celestion. Find us on Facebook

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