| Mid horn question [message #45589] |
Sat, 16 October 2004 10:47  |
Russellc
Messages: 397
Registered: May 2009
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Illuminati (1st Degree) |
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I received my 2123H drivers this morning. They are OEM units still in their original boxes and haven't ever been installed yet, still have their final test tags on. Anyway now I need your midhorn kit, and after looking at all the diagrams on your site & forum, it appears that I must build a small enclosure to go on the back of the unit, correct? If so, what size should it be for this particular driver? About the only discussion I have seen about this said something like "anything over a 1/2 cubic foot" The JBL info says from 1/4 to 1/2 cu ft, so I guess that sounds about right? Is there any tuning advantage to the box size on the rear? What sort of stuffing and amount, if any, should this chamber be filled with, All this is probably in the instructions that come with the mid horn kit and I should just shut up and order it? Thanks in advance,
Russystems
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| Re: Mid horn answer [message #45597 is a reply to message #45591] |
Sun, 17 October 2004 09:04  |
Russellc
Messages: 397
Registered: May 2009
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Illuminati (1st Degree) |
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Wayne let me ask this so I am completely clear on the best way, what type of back do you use on the 7 Pi professional (7PI corner horn, mid horn, high freq horn,) or is it run open backed? I would like to Replicate it as closely as possible! Your Comments on that combination with the stoekit ( spelling) impressed me. Is it still possible to review that thing, or is that over with? What a great idea! Thanks Again for your time & patience,
Russellc
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| Re: Mid horn answer [message #45605 is a reply to message #45602] |
Sun, 17 October 2004 14:52 |
Russellc
Messages: 397
Registered: May 2009
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Illuminati (1st Degree) |
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Thanks a million wayne, I'll see if the little amp is still available.
Thanks for the plans, the hotmail address just isnt big enough, it takes the other one at SBC. Thanks again. Russellc
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| Re: Mid horn answer [message #45606 is a reply to message #45605] |
Sun, 17 October 2004 15:55 |
Russellc
Messages: 397
Registered: May 2009
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Illuminati (1st Degree) |
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Wayne for what ever reason the crossover downloaded to my brief case, but I can't open it, I think it got corrupted. could we try just the crossover again? Thanks, Russellc
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| Re: Mid horn answer [message #45619 is a reply to message #45591] |
Mon, 18 October 2004 13:22 |
GarMan
Messages: 960
Registered: May 2009
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Illuminati (2nd Degree) |
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Hi Wayne. Just to clarity. When you say "open-back", you mean a rear chamber volume sufficently large enough to not impact bass alignment (in this case, greater than 0.5 ft^3). However, a closed back is still necessary to contain back waves. Can you please confirm the last statement. That means the mid-horn should not be used open-baffled? Gar.
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| Re: Mid horn answer [message #45621 is a reply to message #45620] |
Mon, 18 October 2004 15:07 |
GarMan
Messages: 960
Registered: May 2009
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Illuminati (2nd Degree) |
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With my back problem for the past 6 weeks, I've been in no shape to veneer my JBL cabinets, so I've been wasting, ... no, spending my time reconfiguring what I already have. I've crossed a pair of Alpha10 on midhorns, completely open-backed, to my Theatre-3. The transition between mid and hi's is pretty good, but I don't think I have the mid to low transition right yet. I thought I might need to close the back up completely. But that would require woodworking with a bad back... Would you please send me a copy of the crossover document for the audiophile series. I'm interested in seeing how you approached the crossover with the midhorn. I recognise that attenuation would be different for a direct radiator vs corner horn, so I'll keep that in mind. thanks,
Gar.
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seven 
bass and mid cabinets, side view
