Is the Shiva 12" and a PR a good design

Discussion in 'Archived Threads 2001-2004' started by TonyiBe, Feb 5, 2003.

  1. TonyiBe

    TonyiBe Stunt Coordinator

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    I bought the 350w plate amp and am in need of speakers, i have been reading for days and had made up my mind on a Stryke AV12 with 2 15" passive radiators. But the AV12 is out of stock for the next 5 weeks. Will the Shiva 12 with a pr sound good in a 85l box.

    Thanks
     
  2. Rob Lloyd

    Rob Lloyd Stunt Coordinator

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    That's what I have except mine is w/ a PE250w amp. It sounds fantastic for both music and HT. Others have heard it and also commented on how great it sounds. I've compared it to an SVS 25-31 and I thought it handled everything better.
     
  3. Ken_R1

    Ken_R1 Auditioning

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    Jack, what does "alignment" pertain too? Is it the size of the box or some internal structure or what? I want to build the exact same sub Tony is proposing and I'm willing to wait for an AV12. I know it's ambitious for a first timer but if you're going to go through the process you may as well do it all the way. Please excuse the hijack Tony.
     
  4. Alignment might refer to sealed and ported in the same box volume.
     
  5. Al Garay

    Al Garay Stunt Coordinator

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    What about one of these for a dual PR:
    * Lambda Acoustics 12" TD or PB for $169
    * Peerless XLS 12" about $150 from PE
    * Eclipse Aluminum 12" (don't know where you get buy one)

    Thanks,

    Al
     
  6. If we are talking Lambda, you might want to look at the rediculously low priced LE series!!!!
     
  7. Al Garay

    Al Garay Stunt Coordinator

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    Lambda Acoustics TD12x $169, TD12x LE $84 same specs as below with Le= 2.0mH
    from: http://www.lambdacoustics.com/drivers/TD12X.html

    Fs 34Hz
    Qms 2.93
    Qes 0.31
    Qts 0.28
    Vas 160 Liters
    Cms 0.4 mm/N
    Mms 55 grams
    Sd 530 cm2
    Rms 4.0 Kg/S
    Bl 16.4T/m
    Re 7.2 ohms
    Z 8 ohms
    Le 0.3 mH
    Pe (nom)300 Watts
    Pe (max) 500 Watts
    Pe (transient)1000 Watts
    "no" 1.92%
    1WSpl 94.9dB
    Air Gap 18mm
    VC Length 38mm
    Linear Xmax 10mm (peak)
    Mech Xmax 18mm (peak)
    Weight 23lbs

    The PB12 (same prices as TD12x)
    from http://www.lambdacoustics.com/drivers/PB12.html

    Fs 21.0Hz
    Qms 4.2
    Qes 0.32
    Qts 0.30
    Vas 160 Liters
    Cms 0.4 mm/N
    Mms 143 grams
    Sd 530 cm2
    Rms 4.5 Kg/S
    Bl 19.5 T/m
    Re 6.5 ohms
    Z 8 ohms
    Le 0.3mH
    Pe (nom) 300 Watts
    Pe (max) 500 Watts
    Pe (transient) 1000 Watts
    "no" 0.44%
    1WSpl 88.6dB
    Air Gap 14mm
    VC Length 38mm
    Linear Xmax 14mm (peak)
    Mech Xmax 20mm (peak)
    Weight 20lbs

    The 15" versions of these are $179
    http://www.lambdacoustics.com/drivers/TD15X.html
    Fs 23.2Hz
    Qms 3.82
    Qes 0.31
    Qts 0.28
    Vas 467 Liters

    http://www.lambdacoustics.com/drivers/PB15.html
    Fs 18.8Hz
    Qms 5.3
    Qes 0.36
    Qts 0.34
    Vas 415 Liters

    Lambda Acoustics has a good reputation. Nick will continue to stay in business running it part-time. I'm still learning about the specs and why faraday copper is supposed to be a good thing... lower distortion.

    My goal: subwoofer to integrate with my Ellis 1801s (which have good extended bass down to 40Hz ... which is plenty for most of my music but not enough for home theater). I do not need boomy bass that is so powerful that my ears are going to bleed and my dog is going to loose his dinner. Originally, I thought that 2 12" 3.5^3 sealed would be enough. Now, I like what I read about double PRs as an option to get extended bass with low distortion in a small enclosure. Then I could just start with 1 PR sub.

    Thanks for your advice,

    Al
     
  8. TonyiBe

    TonyiBe Stunt Coordinator

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  9. Andrus_R

    Andrus_R Stunt Coordinator

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    350watt plate amp won't be enough for av12. You need at least 500 watts.
     
  10. TonyiBe

    TonyiBe Stunt Coordinator

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  11. Andrus_R

    Andrus_R Stunt Coordinator

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    No, I am not.

    ...
     
  12. Magnus Lindqvist

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    I use the AMP350 from Stryke with my AV12 and I can say that the amp is not running out of steam.
    B.T.W. the enclosure is 115L Fb17Hz with two 15"PR's.
    /Magnus
     
  13. Jack Gilvey

    Jack Gilvey Producer

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    Well, I'm not intimately familiar with all the drivers mentioned, but I think the AV12 would be my choice of all.
    It sounds amazing in a 5ft^3 ported EBS, a 62L dual-PR box (although I was able to bottom it with 250 watts since the box is tuned too high for the rumble filter) and quite stunning in 1 ft^3 with a Linkwitz transform applied (also with only 250 watts...which can't work, of course. [​IMG] ).
    It'll also be linear to higher levels than the other 12" drivers mentioned, by quite a bit in some cases.
     
  14. Jonathan T

    Jonathan T Second Unit

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    In a 9 ft^3 enclosure, ported, tuned to 20hz, how many watts, minimum, do you think I'd need?
     
  15. Jack Gilvey

    Jack Gilvey Producer

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  16. Jack, are you using the linkwitz transform circuit I built for you for the tumult on the AV-12? [​IMG]

    Have you summed the LT gain on to the AV-12?

    and that last decible is the difference between ....hold on, let me get my 1db ears out [​IMG]
     

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