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In Reply to: RE: You are not building a MLTL posted by scooter on June 27, 2012 at 22:36:05
I'd take GM's (and Scott Lindgren's) designs over most; GM had concerns about the bass response of the classic Altec cabinets and set about designing something provided improved bass depth and smoothness, when located against the wall.
It can be easy to become narrowly focussed on a few design elements and unwittingly allow these to dominate, often to the detriment of the end product. That said, your points should definitely be considered; I would bet GM and Scott have (actually it was given as an inferior option for my build)... their technical ability, experience, results, and thoroughness are enough for me.
Cheers,
Raymond
“As long as we have any intention to be right… we should be wary. So long as words have the slightest ego attachment, they are dishonest.” Charlotte Joko Beck
Edits: 06/28/12Follow Ups:
There's definitely two discrete categories once the BR morphs into a MLTL, which is when the cab's acoustic path-length loading is great enough to either cause an increase in vent area [Av] and/or shortens the vent [Lp] for a given tuning [Fb].
I've never bothered to do any actual comparisons, but AFAIK there's no set minimum length before it happens judging by how the driver location moves based on both the path-length and cab averaged cross sectional area [CSA] the way I calculate it, though MJK in his Classic TL doc uses some percentage fixed locations based on taper.
They sim a bit differently, though not having done any real world comparisons, I’ve no clue if there's an audible difference.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
I will edit my previous post so folks don't search and take it as fact.
As ever, I very much appreciate your contributions. They are informative lessons, even if I limit my learning to a general knowledge of concepts, not the specific methods etc. Without them, I would likely not have known where to start my search, what needed to be considered in the early stages... and perhaps even who to engage to do the design work for me. I owe you a debt of gratitude.
What forums do you mostly contribute to these days?
Cheers,
Raymond
“As long as we have any intention to be right… we should be wary. So long as words have the slightest ego attachment, they are dishonest.” Charlotte Joko Beck
You're welcome! I don't follow the forums or post much these days, though I spend more time on the Altec and DIYaudio forums than any others.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
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