MODEL: SP-1208 PRODUCT: Dynamic Speaker EDITION: A/2016 SPEAKER ELECTROACOUSTICAL CHARACTERISTICS sound pressure level 63±3dB at 0.8Vrms/10cm at 2KHz (Mounted in free air without baffle) resonance frequency 500 +/- 15% Hz, 1 Vrms input in free air 800 +/- 15% Hz, 1 Vrms input in 0.5cc Box rated frequency range 100-10KHz frequency response See Figure 1 THD See Figure2, Table 2 (Mounted in Free air 0.5 at without baffle) Test at 0.25w/10cm rub & buzz A sine sweep among 100-1500Hz at rated noise power with 0.5cc back cavity will not result in any buzzing or extraneous sound. ac impedance 8±15% Ω@2KHz, 1Vrms input rated noise power 0.25Watts (in 0.5cc box) short term power 0.5Watts (in 0.5cc box) dimension 12 x 8 x 2.63 mm POLARITY REQUIREMENTS polarity When a DC source’s “+” polarity is attached to speaker’s “+” polarity,”-” polarity is attached speaker’s “-” polarity, the membrane will move forward. magnetic polarity Top of the magnet is the north pole. TYPICAL FREQUENCY RESPONSE (Fig. 1) Magn dB re 20μPa TABLE 2 LIMIT DATA FOR THD Freq.(Hz) Limit (%) 500 30 600 20 1500 10 15000 5 PAGE 1/6 MODEL: SP-1208 PRODUCT: Dynamic Speaker EDITION: A/2016 TYPICAL FREQUENCY RESPONSE (Fig.2) TYPICAL THD TYPICAL IMP CURVE, 0812,1 VRMS INPUT TEST CLIMATIC CONDITION ambient temperature 15oC- 35oC, preferably at 20oC relative humidity 25% to 75% air pressure 86kPa - 106kPa Refer to IEC 268-1 PAGE 2/6 MODEL: SP-1208 PRODUCT: Dynamic Speaker EDITION: A/2016 TEST METHOD SPL AND FREQUENCY RESPONSE CURVE The loudspeaker in 0.5cc box shall be mounted in specified baffle, the measuring microphone shall be free-field microphone and placed at specified distance from DUT, on axis. The drive power is 0.4Watts, and swept sine-wave range is 20Hz to 20kHz with a R40 of test sequence. THD Tested per Section 9.1 and driven at 0.25Watts , sweep at specified frequency range with R40 test sequence. Figure 3 Test setup Speaker Measurement Circuit MT-1000 display RELIABILITY TESTS The sound pressure as specified shall neither deviate more than ±3dB from the initial value, nor have any significant damage after any of following testing. HIGH TEMPERATURE TEST high temperature +75±2oC duration 96 hours LOW TEMPERATURE TEST low temperature 25±2oC duration 96 hours HEAT SHOCK TEST (See in Fig. 4) high temperature +75±2oC low temperature -40±2oC changeover time < 30 seconds duration 1 hour cycle 10 HUMIDITY TEST temperature +40±2oC relative humidity 90~95% duration 48 hours PAGE 3/6 MODEL: SP-1208 PRODUCT: Dynamic Speaker EDITION: A/2016 RELIABILITY TESTS (Continued) TEMPERATURE CYCLE TEST (See in Fig.5) temperature -40oC +75oC duration 45 minutes temperature gradient 1~3oC/min. cycle 10 45 minutes DROP TEST mounted with dummy set mass 100 g height 1.5 m cycle 6 (1 each plain) On to the concrete board LOAD TEST noise signal Pink noise (EIA filter) input power 0.25W (1.4Vrms) duration 96 hours TEST METHOD HEAT SHOCK TEST (Fig.4) TEMPERATURE CYCLE TEST (Fig.5) PAGE 4/6 MODEL: SP-1208 PRODUCT: Dynamic Speaker EDITION: A/2016 PRODUCT EXTERNAL VIEW AND DIMENSIONS no. part name material 1 Front Cap PEEK 2 Frame Iron 3 Terminal SPCC 4 Magnetic Cover PPA 5 Diaphragm PPA PAGE 5/6 MODEL: SP-1208 PRODUCT: Dynamic Speaker EDITION: A/2016 PACKING 100pcs per tray 100X15=1500pcs 1500pcs per box Box size:31X24X19cm PAGE 6/6