Custom built Cabinet (SDA) ??

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  • FTGV
    FTGV Posts: 3,649
    edited July 2011
    OK gothcha now.
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  • FTGV
    FTGV Posts: 3,649
    edited July 2011
    TOOLFORLIFEFAN wrote: »
    Now I now it is important but the CRS+'s and 2B's have the same crossovers/drivers and tweeters. the only thing different is the PR and "internal volume". how is it that it seems this rule does not apply here?? what am I missing??
    The mass of the passive radiator would be adjusted (tuned)for optimum results in the different volumes.
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  • Face
    Face Posts: 14,340
    edited July 2011
    nooshinjohn wrote: »
    While we are discussing the re-invention of the wheel here, would it be at all possible to incorporate ribbon tweeters into the mix?
    A ribbon able to handle the SDA's HF section would either introduce loads of distortion or have poor off axis response up top.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • F1nut
    F1nut Posts: 50,566
    edited July 2011
    Mike (Face),

    Would a deeper cabinet affect the PR response or is maintaining the same volume all that is required?
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • FTGV
    FTGV Posts: 3,649
    edited July 2011
    The pressure would be the same throughout the box regardless so depth would not change anything as long as the box is not over stuffed.Internal volume and mass (weight) of the PR are what affects box/PR tuning.
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  • dorokusai
    dorokusai Posts: 25,577
    edited July 2011
    There is no angle of deflection in the baffle of an SDA loudspeaker.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • F1nut
    F1nut Posts: 50,566
    edited July 2011
    FTGV wrote: »
    The pressure would be the same throughout the box regardless so depth would not change anything as long as the box is not over stuffed.Internal volume and mass (weight) of the PR are what affects box/PR tuning.


    Ok, thanks Fred.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • Joe08867
    Joe08867 Posts: 3,919
    edited July 2011
    FTGV wrote: »
    If internal volume is the same and box isn't over damped the PR response should'nt be effected.

    But it sounds like they are talking about a deeper ie bigger box which would effect the PR.

    If we are talking about a slightly shorter and slightly deeper cabinet all the while keeping internal volume the same than the PR should not be effected.

    If we are talking about increasing the cabinet volume you will need to soften the PR to compensate for the lower pressure in the cabinet. All things being equal, you can't fill a bigger space as quickly as you can a small space. So there will be a pressure differential in a bigger cabinet. It would also slew all the response curves and wreak havoc on the low end.

    If you want to see what I mean. Look and Press on the PR of a set of CRS's and then look and press on the PR of a SDA2B. The pr on the CRS is smaller much stiffer in response to the smaller cabinet volume.
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