2x15" front loaded horn F2B |
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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Posted: 11 May 2020 at 8:15pm |
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no joke, no kidding....... I was asked by a gentleman to post these documents on his behalf (he prefers to stay anonymous). I had a private conversation with an elder forum member about this. He had no objection to me posting this.
Take it for what it is...... I have no clue as to how accurate or correct these plans are. I am sure a discussion on the details will ensue....... So grab your popcorn, cork your bottles, drum roll......... sorry for posting PDF files. I couldn't be arsed to convert all the documents, they are also incredibly compact in size.... I think this is the most crucial part of the plans, the details are in the rest of the documents. (I just realized that there seems to be a missing page, will add it when/if I get it)
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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Danny A
Registered User Joined: 30 May 2009 Status: Offline Points: 444 |
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Thanks Bob4
What would be a good modern driver for this design?
edit - I see that the L15-554K is the modern driver for this design
Edited by Danny A - 11 May 2020 at 9:06pm |
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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..aaaaand, first one to calculate and post hornresp inputs gets a cookie
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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It says "alternative driver", no guarantee, take it with a tablespoon of salt. There are also warnings on several pages urging the prospective builder to evaluate driver clearances before attempting a build. You have been warned.
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 513 |
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Your plans are A+
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madboffin
Old Croc Joined: 03 July 2009 Location: Milton Keynes Status: Offline Points: 1537 |
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It is clear that those drawings have been made by studying an existing cabinet, and some of the detail is a bit off.
For example - the parts drawn on page 5 (T5,6,7,8,12,13) should actually be two solid wood blocks, and the shape isn't quite right. If you make these with small pieces of plywood, you will probably end up with rattles after a period of use. It will take a while to check the dimensions for accuracy as they are all measured from different reference points to the original. If anyone tries to sim this - note that the void between T4, T10, and the horn flare is open to the rear of the baffle and adds to the back chamber volume. The cutaways in the baffle, giving access to that extra volume, were to provide clearance for the backing plates for the flying points that were fitted to the original cabinets. Obviously the flying metalwork is not needed for a ground stacked box. Would be interesting to see page 8 if you can get it, maybe it's a baffle drawing? Edited by madboffin - 11 May 2020 at 10:59pm |
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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the L15-554K does fit easily. the other two RCF I mentioned don't.
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djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Well the outside dimensions match my 'extended' F2B's. And as I've said on this forum before, try them with the PD1550!
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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concept-10
Young Croc Joined: 17 May 2016 Status: Offline Points: 1292 |
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It may well do externally but a PD1550 will not fit this plan, including the driver rebate you have about 155mm depth on this drawing, a PD1550 has a total depth of 160mm, I'm convinced this plan is not totally accurate to the original or the stretched ones. |
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