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brians7

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Posts posted by brians7

    BEYMA CP385/ND and FAITAL PRO LTH102 Tractrix Horn

    in Technical/Restorations

    Posted

    I am just going to buy a couple of different drivers and horns. To see how they sound. I have a pair of Altec 811b and Great Plains 909 driver and Selenium D405 and a copy of the JBL 2380 horns. I will try them with some speakers that I am building now. They are Onken cabinets using Great Plains Audio 416-8c. My speakers that I have been using are LaScala's with ALK universal crossovers. The only test equipment that I have is a Radio Shack SPL meter and some test cds. I am just getting started on my adventure. Thanks Brian

    Does anybody know Altec811

    in Technical/Restorations

    Posted

    Does anybody know how many cubic feet a Altec 811B and 902 driver would take up inside a CornScala. I was thinking about doing a split box design but now I am leaning towards a all in one box. The size is 21.5in. wide X 21.5in deep. And I am trying to figure what the correct height should be. Also any thoughts on a two way verses a three way design. I am going to make curved speaker grills to accomidate the 811 horns. I will try to post pics when i get started. How do you post pics?

    Thanks Brian

    Slimmer CornScala port dimensions

    in Technical/Restorations

    Posted

    Thanks for the response.

    Robert how did you come up with your port dimension. WinISD shows the port should be 18.5x3.25x9.75 with the cabnet tuned to 38Hz. Now in this thread (http://forums.klipsch.com/forums/p/81721/816459.aspx#816459) it says that the port should have a cross-sectional area of 75.205in^2 and the motor bord should have a across-sectional area of 50.00 in^2. giving me a port 18.5x4.0x9.25 and 3 openings in the motor bord 5.0x3.33. I wonder which is right ?

    thanks Brian

    Slimmer CornScala port dimensions

    in Technical/Restorations

    Posted

    Great information here.

    I am going to try and build a pair of CornScala's myself.

    Personally

    I like the slimmer profile, and was going to build a pair with the

    basebin dimensions being 21.5 wide, 21.5 deep, and 28 high, this should

    give the interior volume 6.2 cu. ft.

    Now for the port shelf, if

    I am understanding this correctly the port needs a cross-sectional area

    of between 70 and 75 cu in. and if the interior width of the cabinet is

    20 in. and I make the support board for the shelf the enitre height of

    the port that makes the width of the port 18.5 inches wide, and if the

    port is 4 in high 4x18.5 is 74 cu. in.

    The port shelf length remains 9.5 in.

    I

    hope that these calculations aren't wrong in any way, because I plan

    on starting this project really soon. And if the they ARE wrong that

    someone will chime in and revise them for me.

    A bit more insight about the speakers, they will be split top design.

    I

    will be using Crites Speakers CW1526C Cast Frame Woofers, Altecs 811

    horns which I already have, Great Plains Audio 902, and JBL 2404H baby

    cheeks which I also already have, ALK Engineering crossovers.

    Thanks. Brian.

    Cornwall port dimensions

    in Technical/Restorations

    Posted

    Great information here.

    I am going to try and build a pair of CornScala's myself.

    Personally I like the slimmer profile, and was going to build a pair with the basebin dimensions being 21.5 wide, 21.5 deep, and 28 high, this should give the interior volume 6.2 cu. ft.

    Now for the port shelf, if I am understanding this correctly the port needs a cross-sectional area of between 70 and 75 cu in. and if the interior width of the cabinet is 20 in. and I make the support board for the shelf the enitre height of the port that makes the width of the port 18.5 inches wide, and if the port is 4 in high 4x18.5 is 74 cu. in.

    The port shelf length remains 9.5 in.

    I hope that if these calculations aren't wrong in any way, because I plan on starting this project really soon. And if the they ARE wrong that someone will chime in and revise them for me.

    A bit more insight about the speakers, they will be split top design.

    I will be using Crites Speakers CW1526C Cast Frame Woofers, Altecs 811 horns which I already have, Great Plains Audio 902, and JBL 2404H baby cheeks which I also already have, ALK Engineering crossovers.

    Thanks. Brian.

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