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Thread: Richard Long's Waldorf restoration

  1. 03-17-2012, 08:53 PM #61
    Carl_Huff
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    Putting two different drivers in the cab is a trick popular among Decware Jensen/ Imperial owners.

    Both the Altec 604 and PAS CXL-2580C coaxials have surprisingly similar T/S params to the JBL 2440 in this box. And of course the Altec and PAS drivers are full range.

    I invite others to comment.

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  2. 03-19-2012, 08:49 AM #62
    louped garouv
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    I wonder how the Acoustilog TD-1 was deployed at the Garage originally...
    my understanding is that the stacks at the time were:

    Bertha/Levan, Waldorf, JBL 2397 & 2395, Ring radiators

    thinking that the two woofers in the waldorf had slightly different operating bands...
    a'la the JBL 'helper woofer' style configuration


    kinda the same idea, although with the same drivers used.... right?
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  3. 03-19-2012, 09:04 AM #63
    Carl_Huff
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    "kinda the same idea, although with the same drivers used.... right?"

    Yes!

    You would think with this style of cabinet being so old and recycled in so many products that there would be more empirical information and published experiments to be found on the web. With modern DSP processor/ crossovers being so cheap I would think this cabinet style would have been well documented and exploited. Instead about all that you find is speculation as to the audibility of comb filtering resulting from the output of the scoop merging with that which is direct radiated.

    Maybe there is a good reason for the void of information that has completely escaped me. We shall see!
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  4. 03-19-2012, 02:01 PM #64
    Lee in Montreal
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    Let's see where the resonance will be in the Waldorfs with two 2240s. Then use one driver in the cabinet' usefull range (30-300Hz ?) and the other from 30Hz up to where the resonance starts. Which will diminish the amount of resonance (80Hz ? )
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  5. 03-20-2012, 08:05 PM #65
    maxwedge
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    Thumbs up

    Quote Originally Posted by Carl_Huff View Post
    It has been a while since I posted anything. Altho obligations have slowed me I haven't quit work all together. Here is a recent PIC showing that I have the majority of the cabinet completed. As you can see the scoop flare and bracing are complete. The next step is to cut and apply the baffle board. I have two freshly reconed JBL 2240s on their way as I write this. They should arrive mid next week. This weekend will be about tidying up and applying primer to the box. Hopefully next weekend will the first round of tests and measurements using a pair of JBL 2240 drivers.

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    Carl Huff
    Bad Ass!
    Hope you're a young guy....you know, to move them around!
    My name is Scott, as in give me more power Scottie!!
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  6. 03-20-2012, 09:14 PM #66
    Carl_Huff
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    "Hope you're a young guy....you know, to move them around!"

    Tugging on this thing always reminds me that I am definitely not as young (and fit!) as I used to be.
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  7. 03-21-2012, 05:44 AM #67
    maxwedge
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    Quote Originally Posted by Carl_Huff View Post
    "Hope you're a young guy....you know, to move them around!"

    Tugging on this thing always reminds me that I am definitely not as young (and fit!) as I used to be.
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    Carl Huff
    Well, tugging those around is better than going to the gym, lol.

    Good job.
    My name is Scott, as in give me more power Scottie!!
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  8. 03-21-2012, 06:18 AM #68
    Lee in Montreal
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    I can't wait to se pictures with the 18" 2240s installed and the cabinet painted (a generous coat of Shellac before sanding and painting will make the wood surface stronger)

    Carl, don't forget to generously stuff the rear chamber.

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  9. 03-21-2012, 09:44 AM #69
    Carl_Huff
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    The Zinsser products are really good. I've used them often in the past. However for my last few projects I have been using MagnaClaw black primer from Campbell Finishes. It covers really well, dries quickly and works well under a Duratex textured finish. It runs about $40 per gallon plus cost to ship.

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  10. 03-21-2012, 09:59 AM #70
    hjames
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    I do like the look of those cabinets ...

    An interesting idea - covering the wood with thick black finish.
    I tend to prefer the look of the wood itself ... let the grain sing.

    i just got a pair of (non-JBL) speakers with black painted oak top caps.
    Didn't like that look, so I wiped them down with MEK and removed most of the paint,
    then sanded them down, and rubbed in 4 coats of Watco Danish oil (Cherry finish).


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    Haven't tapped them down flush yet - waiting for the finish to dry.
    2ch: WiiM Pro; Topping E30 II DAC; Oppo, Acurus RL-11, Acurus A200, JBL Dynamics Project - Offline: L212-TwinStack, VonSchweikert VR-4
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  11. 03-21-2012, 10:16 AM #71
    louped garouv
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    i bet the black is for 'that' professional clubsound, industrial look and/or durability concerns......
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  12. 03-21-2012, 10:26 AM #72
    Carl_Huff
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    My background is Pro audio and more recently Cinema sound. It seems that my cabinet color pallet has been traditionally limited to black! Perhaps it is time for a change.
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  13. 03-21-2012, 10:39 AM #73
    louped garouv
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    there is always Battleship Grey!

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  14. 03-21-2012, 10:48 AM #74
    Carl_Huff
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    HJames,

    I like the looks of that Smith horn that you have at the edge of your PIC.
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  15. 03-21-2012, 05:09 PM #75
    hjames
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    Thank you - its my main system in that room ...
    L200 cabinet with 2234, 2405 slot and the external horn

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    Nice sound - but nothing like these club systems ... wow!

    Quote Originally Posted by Carl_Huff View Post
    HJames,

    I like the looks of that Smith horn that you have at the edge of your PIC.
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    Carl Huff
    2ch: WiiM Pro; Topping E30 II DAC; Oppo, Acurus RL-11, Acurus A200, JBL Dynamics Project - Offline: L212-TwinStack, VonSchweikert VR-4
    7: TIVO, Oppo BDP103D, B&K, 2pr UREI 809A, TF600, JBL B460
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