What to build in a Dynaco A-10 Cabinet?

[bigerik]

Hi All
Recently came across a pair of Dynaco A-10's. Brought them home for a listen and found them to be decent, if uninspiring. Did a little reading and found that Morel made a tweeter (forget the number now) which is a direct drop in for it. Then I started wondering about replacing the woofer too. Just a 6.5 inch woofer.
Anyone ever built anything into these cabinets? Nice simple classic cabinets. I can do speaker building, but I have no where to build cabinets. Any thoughts?
Erik

[planet10]

Originally posted by bigerik
Recently came across a pair of Dynaco A-10's. Brought them home for a listen and found them to be decent, if uninspiring. Did a little reading and found that Morel made a tweeter (forget the number now) which is a direct drop in for it. Then I started wondering about replacing the woofer too. Just a 6.5 inch woofer.
Anyone ever built anything into these cabinets? Nice simple classic cabinets. I can do speaker building, but I have no where to build cabinets. Any thoughts?

Besides tweaking things -- that metal grill coming off the tweeter makes a big difference, replaceing the caps in the XO, tweaking the woofer, and routing off the big lip on the baffle -- all the alnico drivers & XO are worth something on eBay (one of my workbenchs is made of A25 carcasses, and the stand under one of my wife's shelves is made from A10s.

If i was rebuilding, i'd probably be thinking of putting the drivers in a new box & turfing the older box instead of the other way around.

dave

[mercator]

So Dave,
Sorry for the thread-jack here but you have piqued my interest.

I have a pair of A-25s in the basement. Any recommendations on what sort of box would suit those drivers?

Thank you for your patience, we now return to the discussion on A-10's.

/Dave

[planet10]

Originally posted by mercator
I have a pair of A-25s in the basement. Any recommendations on what sort of box would suit those drivers?

All the same mods work... figuring out what tweeter level works best & replacing the switch, cheap sand resistors & eleco cap would be the XO mod.

The same box, but done up in ply, braced with no sharp edges would be a 1st round... actually measuring the T/S and seeing if a T-Line would work would be 2nd.

http://www.t-linespeakers.org/classics/dynaco.html

dave

[bigerik]

Thanks Dave
Looking now at starting from scratch. Started working the woofers in the A-10's, and there is a lot of flex in those cabinets. Just does not make much sense at all.....
Thanks!
Erik

[beauford]

Hi folks,

I just bought a pair of Dynaco A10's That are in pristine condition, and the sound fantastic? I notice they are mirror imaged tweeters never saw a pair like these......I am guess ing thes are very early models with Scanspeak drivers?

Does anyone know more about these? I have looked around the web, but can find no info, I am interested in the crossover design details.

Thanks!

[planet10]

I haven't made a map yet...

dave

[bananatuan]

Dear Mr . Planet10
How is the progress ?
I really need schematic of Dynaco 35A's crossover.
Anyway, Tks u very much.

[planet10]

Originally posted by bananatuan
How is the progress ?
I really need schematic of Dynaco 35A's crossover.

That is what you call syncronycity... i just posted the A50 XO last night -- the A35 (and A25) XO is simply the tweeter part of the XO -- althou i strongly suspect that A25.A35 could be improved by adding the woofer low pass.

From My Dynaco Page



And i did a set of impedance measures for the effect of the tweeter levels (attached)

dave

BTW... the XO i traced this from will be amongst my eBay auctions late this week.

[bananatuan]

Noted your infor with many thanks !

I ' ve bought a pair of DYNACO speaker.
At the behind side of speaker , I saw that a mark : Scandyna A30. As u know, Dynaco A25 has got Aperiodic Port uder the woofer but in my speaker Aperiodic Port above the Tweeter.
Beside. I found these sentence in one website:

Dynaco speakers were designed using Seas drivers, and imported to the USA under the Dynaco name. Interestingly the earliest A-25's used ScanSpeak Drivers and had the Aperiodic Port above the Tweeter, but this was soon changed to the widely seen Seas Drivers and the port under the woofer.

When I look at front of speaker , It is similar to Dynaco A35 and furthermore it has Aperiodic Port above the Tweeter.

I wonder what is it model of Dynaco ???

Please advise your comment !!!

Best regard .