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TRUEXTENT TECH BRIEF Driver TRUEXTENT hragm Diression n 950PB Compap TECH BRIEF me in Radia n BeX™ Be4016 lium Do mpressio Be4008 and Be4016 in the Radian 950PB comprese Beryl oustics Engineer Electro-Ac d Rang Sr.rge Format Co ce of the Truextent ectively, one product. Peter J. Andrews, noticing the La Extende bly forour customers have beenrsr has evenhigh performanLet Yourion as, effDo The Math! both mounted in a this combinat Ears decided to sell 1245-16, Forks: on driver Be4016 and Radian's Dr distributo with the compressi the Truextent Assem Recently, One Europeanive Tuning 2 Saye s: the 2 Test Chamber two diaphragm and Sam is ~0.5m from performance of Engineer Truextent Acoustic sweep), and the microphone Simmons 2 the will compare GordonPeter J. Andrews, Sr. Electro-Acoustics are taken in the , transducers, it is This Tech Brief Andrews on driver. All curves , USA with a 1Vrms sine chirp (log 1 is the lightest and stiffest metal for electro-acoustic Buck , Peter compressi are aware that CA 90034 g 8-ohm versions. beryllium diaphragm is driven in red, Radian from a theoretical discussion Marshall 950PB-16 2386 horn. Each While many audiophiles and engineers Angeles, is 'lightweight' it has over other commonshown that metals be expected comparin Inc, Los a JBL results wouldeasy to grasp the vast performance advantages e beryllium diaphragm ey show to the exact same dimensions; one made of mounted ontechnology, not USA ed. Th 1 tuning s. Th forks throat. Similar perhaps94538, Psycho nt, CA white paper 1. (12th-octave) and unsmooth see in published datasheet audible demonstration, we machined three demonstration. compression driver n, Fremolike ourboth smoothed For an easily think there isn't chance to 'ping' these at a recent trade show one might might responses, Electrofusio and of of beryllium. We hope you had a even of representativeonewhat 2 shows A casual observer Materion on-axis frequency aluminum, one aretitanium, curves (left) range (beryllium Metal Matrix Magnesium the same level. First we show Titanium Genuine critical 2-10kHz in blue. The smoothed frequency range at roughly AlBeMet® response in the Composite the aluminum the same and flatter Properties Beryllium s cover roughly higher output except for the both diaphragm n between the two smoothing much difference compressio is Frequency Response ; no ABSTRACT t large forma surround Physical Properties 4.51 +3dB near 5kHz). 1.74 2.90 of a new t smoothed er 2.07 1.84 3 long life testing ; 1/12th-oc of polym e, and Frequency Response new type promises to give the life Density @ 25°C, g/cm 8.60 26.1 manufactur ium dome and 13.4 design 13.9 pated over finite 11.5 opment, beryll e. This CTE @ 25°C, ppm/°C The devel ragm using a ved performanc performance anticicomparisons, 16.4 ium, 159 diaph e in rties 130 210 of beryll its impro or no chang prope driver 216 ing material sive set of tests that exhib Conductivity @ 25°C, W/m·K 0.523 detailed reliability with little ises include ibed includ Thermal 1.025 0.800 exerc comprehen wave is descr 1.56 1.925 and good ragm. Design simulations. A drivers inch plane the l ression in is on a 2 of the diaph is, and moda ragm comp domain analys were measured with the titanium feeling much heavier in analys m diaph time the three forks is the difference in weight, element wavelet The first thing you might notice. when picking up differences above 4kHz and titaniu at 4.50g/cm3. The aluminum fork is definitely tion, high density, Substantial hands compared to the other two. Titanium, of course, has a relatively aluminum, response, distor forks are: 3 your ency range modes. The actual masses of our example tuning Mechanical Properties in the frequ at 2.70g/cm3, and the beryllium fork even lighter than that, only 1.85g/cm . frequency laser scans of 344 196 lighter, 570 particularly and 435 370 tube MPa e categories, UTS Ultimate Tensile Strength, 275 performanc 105 Aluminum Fork = 55.7 g (2.0 oz.) 480 321 240 Titanium Fork = 93.7 g (3.3 oz.) of a Strength, MPa YS Yield 105 44.0 diaphragm 140 193 Beryllium Fork = 38.5 g (1.4 oz.)ared high-frequency 303 for the comp are E Young's Modulus, GPadips, in the material peaks and s N 0.37 ium as the rties of beryllium looks like noise, or sharp forks ring at nearly the same pitch (roughly C5) when struck on a diaphragm (blue) 0.35 0.30 r componentand titanium 0.17it is ODUCTIO of . 0.070 - 0.180 use of beryll thing you might notice iswhat the aluminum s, Ratio The aluminum with dense modal se. that ial prope The nextharder to read because Othemodes of the diaphragm 1. INTR n driver titanium is ~1.6x stiffer than aluminum, ale for the(right)The amater are bit ior for this purpo rings at ressioPoisson's (roughlyto over 20kHz, 4,825 higher pitch smooth E6). Even though comp 5,029 a ration curves 6,948 ~2.4x higher nts unsmoothedtransducer. hardbut rather densely packed break-upa much facturing surface, 9,656 super but the beryllium diaphragm (red) remains inch exit und. Manu 1 both materials. prese e 12,833 stic in Th two to be same tic testing Sound, , which predicted the the surro c Speed of This paperency electroacou and are found noise, ~1.7x heavier, giving essentially the acousresonant frequency m/sec also course, this is not fit many standard and beryllium l work done in our white paper region. Of m ~10kHz, whereas coil modal high frequ num and titaniu this ed to retro rehensive behavior above the is agrees with the theoretica as Thvoice given. Comp design scans show clearly shows Laser with alumi bly, which isstarting at around 23kHz. response) nts, such results are g materials. response (impulse break-up improveme of the assem ssed for break-up. ility testin aring the three the time-domain onset of also addre described, and reliab nted comp to hide this behavior, are is) smoothed are are prese The above table contains typical values can be (and usually processes terminated tube Truextent and AlBeMet are registered ragms. response happening. MATERION CORPORATION a from www.matweb.com for Beryllium, While the frequency ELECTROFUSION trademarks of Materion Brush Inc. data on three diaph www.materion.com/electrofusion AlBeMet AM162 rolled sheet, of thegives us a clearer view of what's ERIAL South Grimmer 44036industries Boulevard M MAT behavior Magnesium annealed sheet, Aluminum 94538-6346 Fremont, technology CA x-ray DIAPHRAG 2024-O, and Titanium Grade 2. of high ION include 510.661.9755 M AS A of a number s for beryllium +1 MATERION CORPORAT BERYLLIU truextent@materion.com xtent standing used in ION ORY OF www.materion.com/true our under which is Application ELECTROFUS 2. HIST Boulevard e metal nergy physics. 44036 for advancing South Grimmer and uniqu s. and high-e instruments used CA 94538-6346 Fremont, onent is a rare ft comp ific aerospace, Beryllium and aircra+1 510.661.9755aterion.com care, scient medical, truextent@m including s used in health satellite structures component laws of nature, st MATERION CORPORATION ELECTROFUSION the deepe www.materion.com/truextent Brush Inc. sion driver. ® Copyright © 2011 Materion ® 44036 South Grimmer Boulevard Fremont, CA 94538-6346 +1 510.661.9755 truextent@materion.com Aluminum 2.78 23.2 193 0.875 186 75.8 73.1 0.33 5,128 TDS2011 06/2013