ARC Audio ARC 15D4 User's Manual
Contents
1. are listed on the previous page One sealed and one ported The sealed enclosure design will in most cases give you the best sound quality and take up less space in your vehicle The ported box design will offer more output then the sealed enclosure about 3 4 dB more but it will reduce the power handling and require more space to install The recommended ported enclosure is not designed for competition SPL performance it is designed for normal listening It will increase the low frequencies output and increase the overall volume while still sounding good when properly tuned and installed A Note About Power Handling ARC Audio woofers are designed to perform for years without any problems The RMS power noted under the specifications is the recommended continuous power for long term use All woofers make heat It is possible to dissipate only so much of this heat The woofer can handle as much as twice its rated RMS power for short periods This is the MAX power rating Continued use of this woofer at greater then the RMS power rating will result a damaged burnt voice coil This damage is considered abuse and is NOT covered under the warranty Small Amp Myth Under powering a woofer is fine This woofer will suffer no damage from a 100 watt amp if it is correctly tuned However even a small amp that is being over driven clipped can destroy a sub Use your power wisely Clipping can be heard as a dull thud or a popping sound I2. 2 SEALED ENCLOSURES Optimum Sealed A Small Sealed 10D4 12D2 12D4 15D2 2 25cuft 1 5cuft 15D4 2 25cuft 1 5cuft PORTED ENCLOSURES Volume 1 30cuft 3 0cuft 3 0cuft Port Frequency Port Quantity 2 dX12 L2 d X12 L_ 3 d X 15 L Port Area and Length PHYSICAL DIMENSIONS Displacement Cutout Diameter 25 250 Mounting Depth 75 75 5 5 o o 3 d X 15 L 30Hz 1 3 d X 12 L 07cuft 41 12577 6 0 3 d X 12 L 07cuft 31 1237 6 0 32Hz 2 4 d X 18 17cuft 11 125 8 0 32Hz 2 4 d X18 L 17cuft 11 125 8 0 Useful Information Ultimately the enclosure you build determines the performance of your subwoofer The size and vent tuning frequency if you re using a ported box determine the low frequency extension and output of the subwoofer We have designed the ARC Audio subwoofer to perform well when used in both sealed and ported enclosures The acoustics of your vehicle also influence bass response The small interior size of most cars and trucks boosts low frequencies dramatically You will need to use a smaller enclosure then normal to achieve a flat bass response As a rule below 50Hz depending on cabin size bass response increases at about 12dB per octave as the frequency decreases This Cabin Gain adds significant bass output to the subwoofer system We have given you two enclosure recommendations that
3. Dual 2 10 Dual 2 40 mes Aye ARC AUDIO Precision Engineered Subwoofer Dual 2 5Q Dual 2 2Q ji Dual 4 10 Dual 4 4Q gt Dual 2 1 33Q Dual 4 2 66Q www Arcaudio com ARC 15D2 ARC 15D4 ARC 12D2 ARC 12D4 ARC 10D2 ARC 10D4 ARC 8D2 ARC 8D4 Dual 2 4Q Dual 4 8Q Dual 2 19Q ae sll Dual 4 20Q ARC Audio 4719 Greenleaf Cir 4 Modesto CA 95356 Phone 209 543 8706 SPEAKER SPECIFICATIO 8D2 8D4 10D2 10D4 12D2 12D4 15D2 15D4 Impedance 1or4 2or8 1or4 2or8 1or4 95 3 8 1 95 7 8 925 3 7 1 95 3 9 975 3 9 DC Resistance Resonant Frequency 22 7Hz 24 7Hz 24 5Hz 25Hz 21Hz Qes 317 367 357 365 298 A 3 j Qms 3 331 3 572 4 56 5 12 4 29 2or8 1 75 7 0 22Hz 317 4 35 1or4 90 3 6 20 4Hz 443 2 462 2or8 1 8 7 2 20 5Hz 431 2 762 Electrical Q Mechanical Q Qts 289 332 331 278 k Vas cuft 1 7 1 55 2 0 x 4 76 317 4 41 375 999 373 9 88 Total Q Equivalent Volume Xmax mm 15mm 15mm 16mm One way Linear Sd cm2 231cm2 350 cm2 530 cm2 SPL dB 89 dB 85 6dB 87dB 150W 250W 350W RMS Power MAX Power 300W 500 W 700W 16mm 530 cm2 89dB 350W 700 W 18mm 840 cm2 89 dB 750 W 1500 W 18mm 840 cm2 Cone Area 89dB 750W 1500 W 1 watt 1 meter Continuous Music ENCLOSURE RECOMMENDATIONS 8D2 8D4 10D
4. f you hear any change in the tone of your subwoofer this is a danger sign TURN IT DOWN If you want more volume get a bigger amp or add another woofer Physics Energy cannot be created or destroyed only change forms What does this mean Your amp does not make power it takes power from your battery and converts it into a different form The subwoofer is just another kind of converter It changes AC voltage from the amp into changes in air pressure that s all sound is and HEAT The more energy being converted the more heat A speaker can not reproduce DC voltage produced when an amp clips but this energy must go somewhere It is all converted into heat This is why clipping is so dangerous to a speaker A great deal of energy can also be lost in the enclosure If your box is not strong enough the sides will flex It takes energy to flex the box This energy is not being converted into sound In short the stronger the box the less energy will be lost So build it Strong This same thing can happen to the car body Sound deaden it will sound better and hit harder Building an Enclosure It is recommended that you use 3 4 MDF Medium Density Fiberboard to build an enclosure Glue all your joints with yellow glue and secure then with screws or nails Make sure the enclosure will fit and that you have adequate room to get it in and out of the vehicle Calculating Enclosure Volume It is difficult to give exact box dimensions t
5. hat are universal for all cars and trucks It is 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 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 cubic inches 2 Next you must convert cubic inches into cubic feet To do this you must divide the cubic inch total by 1728 Example 1512 cuin 1728 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 x 2 1 1 2 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 cubic inches 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 For additional information call ARC Audio Tech support at 209 543 8706 ARC Audio 4719 Greenleaf Cir 4 Modesto CA 95356 Phone 209 543 8706
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