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    Going Infinite Baffle, What 15 or 18 is good?

    I have a 03 civic 4 dr, I want to go IB and wondering which drivers will sound great, any advice is welcome



    2003 Honda Civic LX Sedan
    Alpine CDA-9851 with KCA-420i Ipod Controller
    Seas 27TAFNC/G 1" Aluminum Dome Tweeters
    Dayton RS52AN-8 2" Dome Midranges
    Seas L18RNX/P 7" Aluminum Cone Midbass
    Infinity 6022i 6.5 Rear Fills
    Pair of Elemental Designs 13AV.2 coming soon
    Alpine RUX-C701 and PXA-H701 Digital Crossover/EQ
    2 Elemental Designs Nine.1's
    Alpine MRP-F450 4 channel Amplifier
    Next Audioemotions Q.22
    60 Sq ft Edead V1
    Edead V3
    Enetic 0 Gauge




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    Re: Going Infinite Baffle, What 15 or 18 is good?

    Look for something with a Qts higher than ~.5 or so and a low Fs (lower than about 28hz). Those two things will help you find a woofer that will get low and should sound very nice.

    The Qts value of the sub will be your Qtc value and it will be the alignment that you will be left with if it is a true IB system.



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    Re: Going Infinite Baffle, What 15 or 18 is good?

    what about a qts of .37 and a Fs of 20hz?



    2003 Honda Civic LX Sedan
    Alpine CDA-9851 with KCA-420i Ipod Controller
    Seas 27TAFNC/G 1" Aluminum Dome Tweeters
    Dayton RS52AN-8 2" Dome Midranges
    Seas L18RNX/P 7" Aluminum Cone Midbass
    Infinity 6022i 6.5 Rear Fills
    Pair of Elemental Designs 13AV.2 coming soon
    Alpine RUX-C701 and PXA-H701 Digital Crossover/EQ
    2 Elemental Designs Nine.1's
    Alpine MRP-F450 4 channel Amplifier
    Next Audioemotions Q.22
    60 Sq ft Edead V1
    Edead V3
    Enetic 0 Gauge

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    Re: Going Infinite Baffle, What 15 or 18 is good?

    he said higher than .5 man. but that fs is right.

    is that the aura one?


    but then again, the idq has a qts of .25 and a fs of 20hz. so it might work well. those numbers are just rules of thumb that make any driver sutible for this application.




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    Re: Going Infinite Baffle, What 15 or 18 is good?

    Q series from Fi. Scott will make adjustments to them so that they are perfect IB drivers. He as done this for numerous HT guys. You can also get a killer deal on four of them.

    JP




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    Re: Going Infinite Baffle, What 15 or 18 is good?

    Quote Originally Posted by Dtour View Post
    what about a qts of .37 and a Fs of 20hz?
    It can work, just like the IDQs and it will probably get pretty low with that Fs. What subs are you looking at? Other parameters do matter as well and just looking at Qts and Fs is kind of over generalizing.



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    Re: Going Infinite Baffle, What 15 or 18 is good?

    Aura Sound

    NS15-992-4A


    Nominal Diameter . . . . . . . . . . . . . . .15 inches (393 mm)
    Nominal Impedance (Z) . . . . . . . . . . 4 Ohms
    Sensitivity, 1W/1m (E) . . . . . . . . . . . 86 dB @ 100 Hz
    Power Capacity, RMS (Pe) . . . . . . . . 800 W
    Power Capacity, Peak . . . . . . . . . . . 3200 W
    Frequency Range (-10dB) . . . . . . . . Fo - 1.5 kHz
    Minimum Impedance . . . . . . . . . . . . 5 ohms
    Voice Coil Diameter . . . . . . . . . . . . . 99.2 mm
    Voice Coil Winding Length (h) . . . . . 25.4 mm
    Voice Coil Number of Layers (n) . . . . 1
    Voice Coil Former Material . . . . . . . . Glass composite
    Voice Coil Wire Composition . . . . . . Aluminum Ribbon
    Magnetic Material . . . . . . . . . . . . . . Neodymium radial
    Stray Flux Shielding . . . . . . . . . . . . . Inherent
    Magnetic Gap Depth (He) . . . . . . . . 50.8 mm
    Cone Material . . . . . . . . . . . . . . . . . Aluminum
    Surround Material . . . . . . . . . . . . . . Injecton molded rubber
    Polarity, Outward Motion . . . . . . . . . Positive voltage on (+) terminal
    Net Weight . . . . . . . . . . . . . . . . . . . . 20.1 kg
    Thiele / Small Parameters
    Resonant Frequency (Fo) - Fs . . . . . 20 Hertz
    Voice Coil DC Resistance - Re . . . . . 3.3 ohms
    Total Q - Qts . . . . . . . . . . . . . . . . . . 0.37
    Mechanical Q - Qms . . . . . . . . . . . . 8.0
    Electrical Q - Qes . . . . . . . . . . . . . . 0.40
    Equivalent Volume of Air - Vas . . . . . 169 L
    Radiating Piston Area - Sd . . . . . . . . 765 cm 2
    Electrical / Mechanical Parameters
    Flux Density x Length - BL . . . . . . . . 18 Tesla-meters
    Compliance - Cms . . . . . . . . . . . . . . 206 mm/N
    Total Mass - Mms . . . . . . . . . . . . . . 314 grams
    Impedance
    Frequency Response (1W, 1m)
    Maximum Excursion . . . . . . . . . . . . . 75 mm peak to peak
    Xmax . . . . . . . . . . . . . . . . . . . . . . . . 38 mm peak to peak
    Distortion (1W, 1m)

    I purchased one last night, read a ton of reviews and have yet to find anything negative about them, these ar used in Wilson Audio cabs



    2003 Honda Civic LX Sedan
    Alpine CDA-9851 with KCA-420i Ipod Controller
    Seas 27TAFNC/G 1" Aluminum Dome Tweeters
    Dayton RS52AN-8 2" Dome Midranges
    Seas L18RNX/P 7" Aluminum Cone Midbass
    Infinity 6022i 6.5 Rear Fills
    Pair of Elemental Designs 13AV.2 coming soon
    Alpine RUX-C701 and PXA-H701 Digital Crossover/EQ
    2 Elemental Designs Nine.1's
    Alpine MRP-F450 4 channel Amplifier
    Next Audioemotions Q.22
    60 Sq ft Edead V1
    Edead V3
    Enetic 0 Gauge

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    Re: Going Infinite Baffle, What 15 or 18 is good?

    Actually, yes, I think those would work out very well in an IB environment. They should get pretty low and should be very smooth sounding.



    Video 1
    I may make you feel but I can't make you think.
    Your sperm's in the gutter -- your love's in the sink.
    Video 2

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    Re: Going Infinite Baffle, What 15 or 18 is good?

    Quote Originally Posted by Dtour View Post
    Aura Sound

    NS15-992-4A


    Nominal Diameter . . . . . . . . . . . . . . .15 inches (393 mm)
    Nominal Impedance (Z) . . . . . . . . . . 4 Ohms
    Sensitivity, 1W/1m (E) . . . . . . . . . . . 86 dB @ 100 Hz
    Power Capacity, RMS (Pe) . . . . . . . . 800 W
    Power Capacity, Peak . . . . . . . . . . . 3200 W
    Frequency Range (-10dB) . . . . . . . . Fo - 1.5 kHz
    Minimum Impedance . . . . . . . . . . . . 5 ohms
    Voice Coil Diameter . . . . . . . . . . . . . 99.2 mm
    Voice Coil Winding Length (h) . . . . . 25.4 mm
    Voice Coil Number of Layers (n) . . . . 1
    Voice Coil Former Material . . . . . . . . Glass composite
    Voice Coil Wire Composition . . . . . . Aluminum Ribbon
    Magnetic Material . . . . . . . . . . . . . . Neodymium radial
    Stray Flux Shielding . . . . . . . . . . . . . Inherent
    Magnetic Gap Depth (He) . . . . . . . . 50.8 mm
    Cone Material . . . . . . . . . . . . . . . . . Aluminum
    Surround Material . . . . . . . . . . . . . . Injecton molded rubber
    Polarity, Outward Motion . . . . . . . . . Positive voltage on (+) terminal
    Net Weight . . . . . . . . . . . . . . . . . . . . 20.1 kg
    Thiele / Small Parameters
    Resonant Frequency (Fo) - Fs . . . . . 20 Hertz
    Voice Coil DC Resistance - Re . . . . . 3.3 ohms
    Total Q - Qts . . . . . . . . . . . . . . . . . . 0.37
    Mechanical Q - Qms . . . . . . . . . . . . 8.0
    Electrical Q - Qes . . . . . . . . . . . . . . 0.40
    Equivalent Volume of Air - Vas . . . . . 169 L
    Radiating Piston Area - Sd . . . . . . . . 765 cm 2
    Electrical / Mechanical Parameters
    Flux Density x Length - BL . . . . . . . . 18 Tesla-meters
    Compliance - Cms . . . . . . . . . . . . . . 206 mm/N
    Total Mass - Mms . . . . . . . . . . . . . . 314 grams
    Impedance
    Frequency Response (1W, 1m)
    Maximum Excursion . . . . . . . . . . . . . 75 mm peak to peak
    Xmax . . . . . . . . . . . . . . . . . . . . . . . . 38 mm peak to peak
    Distortion (1W, 1m)

    I purchased one last night, read a ton of reviews and have yet to find anything negative about them, these ar used in Wilson Audio cabs
    Those will work very well in IB. Xmax is also a concern. You will want a lot of linear travel to get useable output.

    5 Or better is a rule of thumb but way off from necessity when doing IB. When placed in the vehicle the final system Q will raise dramatically.




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