Boss Audio Systems P128DC
Contents
1. User s Manual 12 INCH DUAL VoicE CoiL SUBWOOFER BOSS Audio Systems 3451 Lunar Court e Oxnard CA 93030 www bossaudio com tech support www bossaudio com support 800 999 1236 A U D l O SYST E M S Wiring Please take every precaution to wire your DVC woofers for the correct impedance Not Used 12 305mm Subwoofer 1200 Watts RMS E 12 305mm ELECTROPLATE INJECTION CONE BUTYL RUBBER SURROUND E DUAL 2 5 64mm HIGH TEMPERATURE ALUMINUM VOICE COIL 2400 WATTS PEAK 1200 WATTS RMS FREQUENCY RESPONSE 25Hz 1 5KHz SENSITIVITY 96dB 1WATT 1 METER IMPEDANCE DUAL 40HMS MOUNTING DEPTH 7 1 8 181mm MOUNTING DIAMETER 10 2 5 265mm Recommended Enclosures Please note Our recommended box volumes are given for internal air reguirements P128DC Amplitude Response dB Hz Sealed Enclosure 6 3 0 F3 35 34 46 dB 9 12 15 18 t 21 10 20 30 40 50 100 200 300 400 500 1K Hz Frequency Sealed Enclosure Box Volume 1 68 Cu Ft Box is given as internal air volume including driver displacement P128DC Amplitude Response dB Hz Ported Enclosure 6 F3 39 10 20 30 40 50 100 200 300 400 500 1K Hz Frequency Ported Enclosure a Box Volume 1 95 Cu Ft Box is g2. 28 875 Cubic feet Calculating Internal Volume 1 To calculate the internal net volume of the above box you must first multiply the thickness of the wood you are using by Two 2 Example 3 4 x 2 1 5 2 Next Subtract 1 5 from each of the outside measurements of the box Width 12 1 5 10 5 Height 14 1 5 12 5 Depth 9 1 5 7 5 3 Multiply the new totals H x W x D Example 10 5 x 12 5 x 7 5 984 375 4 Next you must convert cubic inches into cubic feet To do this you must divide the cubic inch total by 1728 Example 984 375 1728 5696 Cubic feet
3. iven as internal air volume including driver displacement Port Frequency 34 Hz Port Diameter 3 Inches Port Length 6 Inches Product Specifications Speaker Impedance table 2ohms 4ohms Free Air Resonance Fs 34 34 Total Q Driver FS including all resistance s Qts 0 303 0 542 Q of the Driver FS including non electrical resistance only Qms 4 236 5 711 Q of the Driver FS including electrical resistance only Qes 0 326 0 598 The Driver s compliance expressed as an equivalent Vas 54 779 54 864 Volume of all cubic Ft The Driver s linear displacement inches Xmax 0 5 0 5 The DC resistance of the driver s twin voice coils ohms Re 17 34 Thermal Power rating of Driver Peak R M S Pe 2400W 1200W 2400W 1200W The Driver s sensitivity dB Sens 95 95 Calculating Enclosures It is difficult to give exact box dimensions that are universal for all cars and trucks L for this reason that you must be able to calculate the space in which you have available in order to achieve the proper air volume required It is recommended to build your enclosure from 3 4 thick MDF medium density fiberboard Make sure the enclosure is sealed air tight Calculating External Volume 1 To calculate box volume measure the outside Width x Height x Depth of the enclosure Example 12 x 14 x 9 1512 2 Next you must convert cubic inches into cubic feet To do this You must divide the cubic inch total by 1728 Example 1512 17
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