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viral projects, sort of
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Old 10th March 2021, 04:52 PM   #91
adason is offline adason  United States
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as I tested with those little buggers (few post above) I placed side firing midranges on the box which originally had planar tweeter and two dayton soft domes on the front, because if I would place two midranges on above and below, box would be too big and would be in the projector view
besides, tweeter and domes do not need any volume, so that would be wasted
side reflectors point mids toward the front, sort of, I think it works
its part of my ever changing home theater
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File Type: jpg ht2.jpg (648.7 KB, 192 views)
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Old 5th July 2021, 11:13 PM   #92
adason is offline adason  United States
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its been a while I updated this tread. Off course I build a lots of stuff, but I hope its no longer considered build under quarantine. I hope its over soon.

I was lucky to win first round of Vfet lottery, and was first one to fire it up. Its an amazing amp, sweet, musical, all around great. Not the lowest distortion, but very pleasing.

I put together another F1J, this time with LU1014D. Sounds great, needs box, then it will be brought downstairs and compared to other amps. This is third variant of F1J. One day I have to compare all three.

Next one I did was M2, exactly up to the Tea-Bag spec. I love this one, one of the best.

Finished foam board cases for two active crossovers, I think I am all set when it comes to active crossovers.

Put together small bookshelves, just four fullrangers with tweeter in the middle. They sound fine, great testing speakers.

Started some more projects based on LU1014D or LD1014D, as I have plenty of these and adapters thanks to wg45.

Will post some pics later. Stay safe.
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Old 5th July 2021, 11:26 PM   #93
WBS is offline WBS  United States
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viral projects, sort of
I'm always impressed, and inspired, by your novel use of parts. I'm looking forward to seeing additional pics.
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Old 6th July 2021, 02:03 AM   #94
WBS is offline WBS  United States
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viral projects, sort of
Default Seas FA22RCZ full rangers in foam core box

Rereading this thread I just realized I never posted photos of my finished viral project as promised a year and a half ago. You can read my original description here.
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Old 6th July 2021, 01:32 PM   #95
adason is offline adason  United States
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very nice!
are you using active crossover and biamplification?
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Old 6th July 2021, 05:22 PM   #96
WBS is offline WBS  United States
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Yes.

The drivers were a bit "shouty" by themselves, as whizzer cones tend to be. So I added an adjustable EQ designed by Nelson. That turned these into one of the top 3 FR drivers I've ever heard, close to Cubes and the Seas 6 inch version. I think they sound better than the Feastrex OBs I heard at Burning Amp years ago!!!

Although they are really nice as full range speakers I now have them doing the duty of everything above about 100 Hz. I have 15" woofers covering everything below that. I'm using the 6-24 crossover from the diystore.
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Old 6th July 2021, 09:18 PM   #97
adason is offline adason  United States
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well done, that's the way to do it
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Old 19th July 2021, 06:15 PM   #98
adason is offline adason  United States
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I have started work on new speakers, based on betsy on open baffle, slim grs planar, and foster planar

here is foster measurements, with just 2uF protecting cap
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File Type: jpg slim1.jpg (400.8 KB, 52 views)
File Type: jpg slim2.jpg (609.3 KB, 57 views)
File Type: jpg slim3.jpg (350.2 KB, 42 views)
File Type: jpg slim4.jpg (709.1 KB, 36 views)
File Type: jpg slim5.jpg (711.4 KB, 32 views)
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Old 19th July 2021, 06:20 PM   #99
adason is offline adason  United States
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its all work in progress, just gathering the data about fr responses

betsy underwent whizerectomy, and is waiting for the phase plug

here are some data on slim grs tweeter, its slightly rising, I plan to use it from 900Hz up, measurements are with 20uF protecting cap
there is slight hump centered around 9kHz which needs to be tamed
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File Type: jpg slim6.jpg (713.0 KB, 43 views)
File Type: jpg slim7.jpg (730.0 KB, 37 views)
File Type: jpg slim8.jpg (695.8 KB, 28 views)
File Type: jpg slim9.jpg (778.6 KB, 19 views)
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Old 19th July 2021, 06:24 PM   #100
adason is offline adason  United States
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betsy you already know, no need to show all, here is with 1.4mH inductor, and 150Hz high pass
I may need to increase inductor, or use steeper filter, betsy has significant output above 1kHz
otherwise nice low distortion, sounds always great
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