Considering a change in direction...

Or maybe a move up the food chain. I've been slowly trying to work out a deal with Bowtie for one or both of his empty 210 cabinets, with an eye toward building A4s to replace my Simplex W stacks. Would this give me a sonic improvement, using the same drivers and horn setup? Woofers are 515s, horns/drivers are 1005b TFs/288B. I'd prolly keep the Frazier tweeter arrays. Of course the M19's sandwiched in between would have to go somewhere else...

http://www.hostboard.com/forums/hbmc.../2015/06/7.jpg

hello analog addict,i have two mty 210 cabinets that you can have if you can come and get them in birmingham,alabama.they are in decent condition considering their age.i got them out of a local theater back in the eightys.they were probably installed in the 40's or 50's.no components are installed in them.free to a good home.cdf

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Originally Posted by analog addict

http://www.hostboard.com/forums/hbmc.../2015/06/7.jpg

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I like the miniature baby A7 on the left side of the picture. :)

Well, using 210s vertically didn't work for me due to the HF horns being so far away like yours are now, so guess it's not a problem for you and you'll need wings to 'fill the corners' with rolls of damping to fill the cavities if you don't make them false wall built-ins like I did with A7s. This will give you horns that go about an octave lower, so a good thing and you won't have all the cavity reflections plus M19 cab diffractions to muck up a considerable portion of the BW that you currently have, though there will be the 210's parallel horn wall reflections that I'm glad to be rid of.

GM

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Originally Posted by GM

Well, using 210s vertically didn't work for me due to the HF horns being so far away like yours are now, so guess it's not a problem for you and you'll need wings to 'fill the corners' with rolls of damping to fill the cavities if you don't make them false wall built-ins like I did with A7s. This will give you horns that go about an octave lower, so a good thing and you won't have all the cavity reflections plus M19 cab diffractions to muck up a considerable portion of the BW that you currently have, though there will be the 210's parallel horn wall reflections that I'm glad to be rid of.

GM

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Thank you sir. Adding an extra octave was part of the idea behind the 19's inclusion.

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Originally Posted by C.DARRELL FREEMAN

hello analog addict,i have two mty 210 cabinets that you can have if you can come and get them in birmingham,alabama.they are in decent condition considering their age.i got them out of a local theater back in the eightys.they were probably installed in the 40's or 50's.no components are installed in them.free to a good home.cdf

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I appreciate the offer, but AL is a bit far for me. You might want to consider posting them on the buy/sell trade sub forum..

And as for the baby A7's they're actually as I bought them, loaded with 604-8Gs, with a small hole cut in the back for the compression driver....

http://www.hostboard.com/forums/hbmc.../2015/07/3.jpg

Deja vu.... Round number 2

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I like the miniature baby A7 on the left side of the picture. :)

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I have a nicely constructed pair of "mini-A7" boxes for 12" woofs. Intending to use them with 414s but currently have many speaker projects in the pipe, as it were.

If anybody from the board is interested, pick up in downtown DC or maybe Philly.

JR

DC as in Washington DC?
If so, I'm in Northern VA and may be interested.

Scott

Yeah, DC as in belly of the beast, shrine of Baphomet, den of Iniquity, Washington DC. Dupont Circle, to be exact

Shoot me a PM or mail to jroberts at prismnet_com. You can take the boxes if you're actually gonna use em. I can hoard stuff pretty good myself. ;op

Looks like a promising space limited solution, which is why I acquired these.

Joe Rob

Made it home. Now the wait begins.....

http://www.hostboard.com/forums/hbmc.../2015/08/2.jpg

VERY KOOL! That is a no nonsense cab for sure!

AA is this the cab from Bowtie ?

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Originally Posted by Geekstar

VERY KOOL! That is a no nonsense cab for sure!

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Yeah, except for the parallel walls that can't be damped enough without screwing up its response, though using a 300 Hz XO like it was initially designed for mostly solves the problem.

'Steve Mac' did them up right by DIYing them expanding in both planes, then electronically time aligned 511E, super tweeter horn in mouth: Mid Bass Horn (80-800Hz)

Super Bad Cat [view 'stereo pic' 1-4]

A 'shootout' with one of DSL's larger Synergy horns would be interesting, though theoretically the latter should perform better overall, but my 'burning' question is would it be enough to justify all the extra time, cost, labor?

GM

edit: AB, can all the info on his site be added for posterity to the Altec library?

original thread: http://www.hostboard.com/forums/f700...-80-800hz.html

When I look at that cabinet, I always feel like putting two cross members across the mouth to stabilize and break up resonances in those large side panels. 2x2s would do it.

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Originally Posted by Altec Best

AA is this the cab from Bowtie ?

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Sure is. He has one more which I'm hoping to pick up by the end of next summer. Now I just gotta figger out what to pay him.....

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Originally Posted by Geekstar

When I look at that cabinet, I always feel like putting two cross members across the mouth to stabilize and break up resonances in those large side panels. 2x2s would do it.

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Normally, the 'wings' do it, so without them they need [3] hardwood closet rods covered in thick felt or similar, though in both cases its necessary to either increase exterior horn panel thickness to ~2.25" or add [3] axial 2x4 braces on end IME and even then, considerable damping was required to mostly quell its parallel panel eigenmodes.

If you just want to mimic the 'wing's' bracing, a 2x8 x 2x4 'L' angle will theoretically do it.

Don't know what the minimum wood size is for sure, just know that I got excellent results with the scrap I had.

They really 'color' the sound otherwise, though after decades of even what little was left got to where it was sometimes too distracting, so will never again recommend/use a parallel wall horn except possibly a true 'sub'.

GM

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Originally Posted by analog addict

Sure is. He has one more which I'm hoping to pick up by the end of next summer. Now I just gotta figger out what to pay him.....

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That's even better you get them with no price included ! :biggrin2:

Bowtie - "You Are The Man" ! :wink2:

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Originally Posted by GM

edit: AB, can all the info on his site be added for posterity to the Altec library?

original thread: http://www.hostboard.com/forums/f700...-80-800hz.html

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GM I will take a look and if I can I will... I don't think I can add the entire thread but will try to add the important information in it. Basically I only uploaded .pdf's and jpg's and data sheets to the Library.Currently looking into other hosting sites ATM... So I'm not sure if I should do it now or after a move if we move at all.. I have to get together with Todd on this... The most important thing is that we can import a copy of the Altec User Board database to a new server from 12/2002 till now 9/2015. IME we CAN NOT lose all the information in this forum as that would be disastrous for us.. From my chats with Steven IIRC he makes a back up of the database once a week..

Right now I'm using my Dropbox account for the Altec User Board Library..Once we have a new server or move the library to Todds site we will have a much larger storage capacity for the Library.I'll keep you in the loop.