Question about Rockford Fosgate Car Speakers & Subwoofers

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What is the xmax of a memphis 15PR12D4 subwoofer ?

Max excursion.

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From the probing that i have done the best response has been 49 mm
hope that helps

Posted on Feb 19, 2009

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I need to know if the specifications for the Perfomance Teknique ICBM-5712DX RMS total wattage is for both coils or per coil. The RMS total wattage rating is 500 watt


The 500W RMS total wattage is for both coils combined. If you want to get REALLY specific, all of the industry-specific specifications are as follows.
  • 12" Dual 4 Ohm Peformance Subwoofer
  • Power Handling:
    • Peak: 1000 watts
    • RMS: 500 watts
  • Impedance: Dual 4 ohm
  • Reinforced aluminum curvilinear cone woofer
  • Oversized butyl rubber surround
  • 5 spoke Die-cast aluminum basket
  • 2" Flat ultra excursion spider
  • Industrial Chromed Hex bolt retained T-Yoke
  • DC resistance (Re): 3.2 ohms each coil
  • Frequency range: 20 Hz-1.1 kHz
  • Fs:30 Hz
  • QTS:.526
  • QES:.614
  • QMS:7.698
  • VAS:56L
  • SD:.0491M
  • SPL: 89.58 dB 1W/1m
  • Xmax:16mm
  • Mounting Depth: 160 MM
  • Mounting Hole Dia.:282 MM
  • Mar 01, 2011 | Performance Teknique ICBM-5712DX 12in Car...

    1 Answer

    Can a kicker cvr be fixed if it is blown if so how


    Speaker lesson here. For space and time, I'll not get into certain nomenclature. Working from top to bottom, you have the cone, rubber surround, basket, spider, voic coil former, voice coil, and the magnet. The binding posts are connected to the tensil leads which connect to the spider and the voice coil. As the woofer is positively + and negatively - charged, it creates a magnetic field which moves the woofer up and down. There is a small gap between the magnet and the voice coil and former that's called a magnetic gap. This gap is what helps the speaker to move up and down, and creates the Xmax. The Xmax of the woofer is the maximum linear excursion the woofer can travel without causing permanent damage. With a blown speaker, normally the voice coil and voice coil former have been pushed out of the correct magnetic gap, usually around the top of the magnet. That means that the only way to fix it is to take the woofer completely apart. My suggestion is to just go and spend the money. A blown speaker is a sign of abuse, and voids warranties from the majority of companies out there to include Kicker.

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    What are specs for a ported subwoofer enclosure for a 12" pioneer champ series


    TS-W307D2
    Design and Specifications
    12” Dual Voice Coil (DVC) Subwoofer for Enclosure applications 1,200 Watts Max. Power Handling 400 Watts Nominal Rating Qts = 0.44 Xmax = 8.7mm Fs = 33.9 Hz Vas = 42.2 litres Frequency Response : 18 ~ 500 Hz. Efficiency : 89 dB Impedance : 2 x 2 Ohm (Total 1 or 4 Ohms) Delivered with “jumper link”: ready for 4 Ohm use f0 (Lowest Resonant Frequency) : 33.9 Hz. Recommended Sealed Enclosure : 24 ~ 49.6 Litres RECOMMENDED sealed enclosure, not Ported. 24 Litres = 1464.569 cu. inches 49.6 Litres = 3026.777 cu. inches

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    What is the rms for a single max12d lanzar is it 500rms or 250rms


    Description One of the oldest and most respected names in automotive sound is also one of the most consistent winners on the competition circuit. Lanzar offers a wide range of high performance subwoofers, from the pounding OptiDrive Series to the rugged MAX Series. The MAX12 dual-coil subwoofer offers high power handling, great bass response, an economical price, and a 3 year warranty. Specifications: *Power handling: 500 watts RMS/1000 watts peak *VCdia: 2" *Impedance: 4 ohms per coil *Magnet weight: 130 oz. *Fs: 33.6 *SPL: 88 dB 1W/1m *Vas: 3.19 cu. ft. *Qts: 0.47 *Xmax: 10mm *Dimensions: A: 12.09" B: 11.15" C: 6.42"

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    1 Answer

    How many different ways can you wire a 12 memphis subwoofer


    you need conneciton to amp streit from battery terminal but make sure you put an inline fuse in the main wire first for safty

    Oct 07, 2009 | Car Speakers & Subwoofers

    1 Answer

    Db drive vs kicker


    The Kickers are the way to go here- they move more air because naturally a 15 inch square has more area than a 15 inch circle- thus more air moved =greater spl =LOUDER. The only thing that might get some equality between the two is if the db drive round sub has a far greater xmax that is the linear movement of the cone from start to full excursion-IF the db drive has drastically larger xmax than it could possibly outperform the L7 because of greater cone excursion which also =more air moved=louder---- haha thats a tricky one but ya got me wondering too so let me know what you find out please-Ive always been a kicker fanatic so im probably biased towards their products-never heard nothing bad about db drive though either im in salt lake city i dont know of anywhere out here that even carries their products so i have nothing to reference by except kicker L7's kick asssssssssss

    May 23, 2009 | Kicker Solo-Baric L7 S15L72 Car Subwoofer

    1 Answer

    High x-max vs. high sensitivity


    Sensitivity is a representation of efficiency. The higher the efficiency, the better the sound quality.
    Xmax is a measure of the "throw of the cone peak to peak. This is a direct representation of the volume of air the subwoofer will displace..
    A High X.Max subwoofer will displace more air - and therefore produce more SPL in a vented enclosure.
    Sensitivity on these subs aren't crucial, because the customer is looking for LOUD and will purchase a large class D Mono amplifier to power it - characteristically low in sensitivity as well due to the way the power is inverted. Highly efficient, yet low sensitiviy.
    I am definately a basshead! My show car has (4) 15" Cerwin Vega Stroker PROs. (one of the most highly EFFICIENT high xmax subs available) (86dB). (36-44mm Xmax (adjustable for SQ or SPL)
    ea141e4.jpg If you are looking for SPL, High XMax, Low sensitivity, and lots of power is the way to go. Generally, to increas SPL by 3dB, yuo must either increase surface area of driver 2x or double the input power. Slot ports, aeroports, and loaded horn ports can also increase your dB level by up to 3dB as well.
    Properly constructed enclosures have an effect as well. Instead of wasting some of your power on vibrating the enclosure, it should be braced properly to reduce the wasted energy.
    All of these tips will add tou your satisfaction of the product. You can make a $100 sub sound phenomenal in a proper enclosure, and a $400 sub sound like $hit in a prefab or poorly constructed one.

    Your original question - with all things equal except the subwoofer, the subwoofer with the higher Xmax should yield the most SPL - due only to the fact of air displacement.

    If you have additional questions or need clarification dont hesitate to ask.

    Jan 15, 2009 | Car Speakers & Subwoofers

    1 Answer

    I need the following specs on an Eclipse SW8102 DVC subwoofer.


    http://www.cartoys.com/cartoy/pdfs/Eclipse_spkr_manual.pdf

    Page 7 - Enjoy!

    Fs: 26Hz
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    DCR: 4.0 ohm/coil
    Vas: 2.01 cuft
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    For the rest of the T/S, you will need to talk directly to their support line tech :
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    Phone: 310-327-2151

    Hope this helps you with your enclosure.

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