markstuk Posted October 5, 2016 Share Posted October 5, 2016 (edited) Stumbled across these - [url="http://hoovi.at/deeflexx-2/products/?lang=en"]http://hoovi.at/deef...oducts/?lang=en[/url] - I can sort of see how it would work for a floor mounted 12" guitar combo, but for bass - especially low frequencies with wavelengths > 5 ft (200 hz and down) it's hard to see how it would help Thoughts? Edited October 5, 2016 by markstuk Quote Link to comment Share on other sites More sharing options...
ColinB Posted October 5, 2016 Share Posted October 5, 2016 What's wrong with a piece of gaffa tape stuck to the grill cloth in front of the dust cap? That's what I used for years in my guitaring days. Worked a treat to stop the on-axis beaming. Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted October 5, 2016 Share Posted October 5, 2016 Just use a well designed cab that doesn't beam and you won't need one. That's pretty much impossible with guitar, as any twelve is going to beam the highs, but not so difficult with bass. Quote Link to comment Share on other sites More sharing options...
Beer of the Bass Posted October 5, 2016 Share Posted October 5, 2016 Other than being optimistically priced, is the concept a sound one for guitar use? And do the shaped bits and cutouts do much that a simple angled perspex screen wouldn't? Quote Link to comment Share on other sites More sharing options...
markstuk Posted October 5, 2016 Author Share Posted October 5, 2016 My assumption is snake oil Quote Link to comment Share on other sites More sharing options...
mikel Posted October 5, 2016 Share Posted October 5, 2016 I am fairly easy to blind with science and that blurb did it after about three paragraphs. If something needs that much explaining I dont see what it can actually do. Quote Link to comment Share on other sites More sharing options...
fretmeister Posted October 5, 2016 Share Posted October 5, 2016 The Mitchell Donut is far cheaper and works on guitar amps. £5 of foam and scissors. Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted October 5, 2016 Share Posted October 5, 2016 [quote name='Beer of the Bass' timestamp='1475695365' post='3148093'] Other than being optimistically priced, is the concept a sound one for guitar use? And do the shaped bits and cutouts do much that a simple angled perspex screen wouldn't? [/quote]It would work, but it's far more complicated than necessary. A simple vertical slat in front of the cone would work, as would a donut. But a foam donut wouldn't work all that well, as too much sound would pass right through it. I'd use plywood. Both work on the principle of diffraction, explained here in section 1-5. http://www.jblpro.com/pub/manuals/pssdm_1.pdf Quote Link to comment Share on other sites More sharing options...
vbance Posted October 5, 2016 Share Posted October 5, 2016 https://www.youtube.com/watch?v=YtXhdVR84cI Quote Link to comment Share on other sites More sharing options...
Norris Posted October 6, 2016 Share Posted October 6, 2016 [quote name='ColinB' timestamp='1475689644' post='3148026'] What's wrong with a piece of gaffa tape stuck to the grill cloth in front of the dust cap? That's what I used for years in my guitaring days. Worked a treat to stop the on-axis beaming. [/quote] That's what my guitarist uses - black gaffa tape Quote Link to comment Share on other sites More sharing options...
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