s-300-01(rev.1) star acoustics co. a4( 210mmx297mm) messrs : specification item : dynamic micro speaker customer?s model : model number : STS-2308-01 size : ? 23 5.0t date of approval 2007. 03.09 star acoustics co. seojin bldg. 887-10, shinchun-dong, shiheung-si, kyung gi-do.korea. tel : (031)404-4203 fax : (031)318-8692 e-mail : leedh4203@hanmail.net
s-300-01(rev.1) star acoustics co. a4( 210mmx297mm) STS-2308-01 dynamic micro speaker 1. scope this documents contains both general speaker requirements, qualification requirements, and those specific elec trical and mechanical requirements for this model. ( dynamic micro speaker ) 2. mechanical specification 2.1 dimension 23mm x 5.0mmt 2.2 weight 5.21g 10% 2.3 magnet nd-fe-b , ?9.5mm x 1.5mm 2.4 appearance should not exist any obstacles to be harmful to normal operation, from damages, cracks, rusts and distortions, etc. 3. electro-acoustical specification 3.1 s.p.l 84db 3db ( 1.0w/0.5m ) average at 1.0k, 1.2k, 1.5k, 2.0khz 3.2 impedance 8 ohm 15% at 1v, 1khz 3.3 power rating nominal 0.7w, max 1.0w 3.4 resonance frequency 600hz 20% at 1v. 3.5 frequency range 600hz ~ 20khz 3.6 distortion 5% max, at 1khz, 0.7w 3.7 magnetic flux density ------------ gauss 3.8 polarity positive dc current is applied to the terminal marked(+) should be moved forward. 3.9 terminal strength capable of withstand a 500g load for 3sec. without resulting in any damage or rejection. 3.10 buzz & rattle must be normal at 2.36v sine wave between 600hz to 20khz
s-300-01(rev.1) star acoustics co. a4( 210mmx297mm) STS-2308-01 dynamic micro speaker 4. qualification test 4.1 initial characteristics all data initially taken at + 25 ( room temperature ). component must be fu lly stabilized at + 25 before data is taken which may require up to a 4 hour soak. 4.2 heat resistance test sound pressure level is not to deviate by more than 3db from pre-test measurement af ter exposed for 96 hours to +70 2 then removed and placed under normal tempe -rature for a period 3hours. 4.3 cold resistance test sound pressure level is not to deviate by more than 3db from pre-test measurement af ter exposed for 96 hours to -20 2 then removed and placed under normal temperature for a period 3 hours. 4.4 static humidity precondition at +25 for 1 hour. then expose to +40 with 90 to 95% relative humidity for 96 hours. finally allow to dry at room ambient for 6 hours before taking final measurements. 4.5 load test (life test) 0.7white noise is applied fo r 96 hours application of- filtered signal and satisfy the tests listed on specifications 2.4 / 3.1 / 3.4 / 3.10 4.6 drop test drop the unit contained in no rmal box onto the board 20mm thickness 10 times from the height of 0.75m and then should satisfy the tests listed on sp ecifications 2.4 / 3.10 4.7 temperature cycling one cycle shall consist of 30minutes at +70 followed by 30minutes at -20 . allow 20 minute chamber transition time at +25 between temperature extremes total of 10cycles. temperature() ( diagram fo r 1 cycle )
s-300-01(rev.1) star acoustics co. a4( 210mmx297mm) STS-2308-01 dynamic micro speaker 5. frequency response curve 6. measurement setup 6-1. testing input : 1.0w 6-2. measuring distance : 0.5m 6-3. potentiometer range : 50db 6-4. response time : 0.5 sec sac-23nr01 measuring microphone: b&k4133 anechoic roome
s-300-01(rev.1) star acoustics co. a4( 210mmx297mm) red (+) black (-) black bond houng: molex 51021-02 wire : ul 1571 awg #28 model no STS-2308-01 date 2007.03.09 title dynamic micro speaker desd.by ched.by appd.by scale n/s tolerance 0.2 unit mm
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