MJK's Fostex FF125wk BLH project - Page 13 - diyAudio
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Old 16th June 2013, 07:52 AM   #121
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I'll try and get a horn measurement tomorrow.
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Old 16th June 2013, 04:45 PM   #122
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Here is the measurement, taken about 2" outside the horn mouth.
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File Type: jpg W5 BLH horn output.jpg (76.7 KB, 157 views)
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Old 16th June 2013, 10:55 PM   #123
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A couple of pictures. Sadly, I think I probably damaged one W5's voice coil with a particularly violent 40hz test tone...
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File Type: jpg IMG_0291.jpg (695.8 KB, 143 views)
File Type: jpg IMG_0292.jpg (625.0 KB, 137 views)
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Old 17th June 2013, 10:10 PM   #124
DrBoar is offline DrBoar  Sweden
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I am sorry to hear about the driver. Have you measured near field driver output both with the horn running and then with the final sections filled with damping material to spoil the horn. The difference will indicate how much radiation resistance and at what range the horn contribute.
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Old 18th June 2013, 03:11 PM   #125
Colin is offline Colin  United Kingdom
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Quote:
Originally Posted by Bob Brines View Post
This is interesting. I am corresponding with another European who was mentioning 6mm plasterboard. Is this a common construction practice? I believe that my 35yr old house has 1/2" drywall on 16" center 2x4's. I think that this is still standard practice. 5/8" drywall is also commonly available.

Bob
Plasterboard is common in modern UK houses, used as stud and partition walls between rooms, particularly in timber frame buildings.
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