![]() ![]() The T25S impedance resonance occurs at a moderately low 894.5Hz (factory spec is 940Hz). I began testing the T25S-6 silk dome version (Photo 1), using the LinearX LMS analyzer to produce the 300-point impedance sweep illustrated in Figure 1. Underhung voice coil with a Titanium formerįlexible and lightweight tinsel leads from DenmarkĪluminum rear chamber with wool damping materialĮxtremely wide frequency range 2.2kHz to 22kHz (silk), 2.2kHz to 40kHz (Beryllium and diamond) Narrow surround for less “soft dome” colorationįlush-mounted surround and a rear-mounted magnet system for flat frequency response and wide off-axis response In terms of features, all three share pretty much the same feature set:Ģ5mm dome diaphragm - both the Beryllium and Diamond domes have a first break-up mode in the ultrasonic rangeĮxtremely low moving mass - Mms=0.16g (silk), 0.10g (Beryllium), and 0.15g (diamond)-for better transient response and higher outputįully saturated neodymium motor with a copper sleeve shorting ring for low nonlinear and modulation distortionĢmm linear excursion and a large pole vent for low distortion low-frequency operation Photo 1: BlieSMa T25S-6 silk dome transducer These will be explicated in that order, starting with the T25S silk dome model. The versions being tested this month are the T25S silk dome, the T25B Beryllium dome, and the T25D diamond dome tweeter. All three tweeters appear to be built on the same platform, but optimized for each diaphragm material. Three of the four are being featured in this month’s Test Bench article. For the last 3.5 years BlieSMa has been producing some very high-quality OEM high-frequency transducers and has now introduced four more 25mm domes to its catalog. XBENCH TEST DRIVEROver the last 20 years, Malikov has worked at Ultrasound Technologies at industry legend Morel as a QC manager and a transducer engineer and at Accuton, the very well-known high-end driver OEM, as a production engineer for more than 8 years. BlieSMa, which is located in Blieskastel, Germany, was founded Januby Stanislav Malikov. \t\t\tUncached Read\t47.07\t9.Test Bench has previously featured two 34mm dome tweeters from BlieSMa: the T34A aluminum-magnesium alloy dome tweeter in the June 2018 issue of Voice Coil, and the T34B Beryllium Dome tweeter in the March 2019 issue of Voice Coil. \t\tFloating Point Library\t112.17\t5.04 Mops/sec \t\t\tUncached Read\t28.46\t5.58 MB/sec Īnyway, it's the year of the portable. \t\tSpinning Squares\t7.23\t5.06 frames/sec \t\tFloating Point Library\t54.53\t2.45 Mops/sec Well, this tangerine machine is soon to be history. Is it a typo for your OpenGL test value = 7.23? Mine is 22.45. Something is terribly wrong with that OpenGl scoreĭrumbug1, I'm on the 333 boat as well. \t\tFloating Point Library\t76.38\t3.43 Mops/sec \t\tFloating Point Library\t93.16\t4.18 Mops/sec \t\t\tL1 Cache\t\t32K (instruction), 32K (data) 800 Mhz FP iMac G4, 256 MB Ram.Superdrive.100 Mhz Bus ![]()
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