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Dynaco a25 question.

broomdust

broomdust

Member
Dynaco a25 SEAS with ports on top!

Hey all,
briefly, I've stumbled upon a guy who has a pair for sale. He has recapped with Jantzen crosscaps, not sure of the value,maybe 4.7uF. Woofers were rotated, rewired internally,
installed upgraded connectors, and "treated" the rubber surrounds with some kind of rubber refresher/preserver. A couple of these concern me.

The price is right, I haven't seen or listened to them, going to check them out tonight.He says he's been using them for three years and they sound great

With limited info., I'm just not sure about the crosscaps or this rubber treatment.



I've had a25's in the past, like 'em OK but the price continues to increase in most circles.

Thanks.
 
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Most 25's have an 8 uF cap. A 5 uF cap will make the xo point higher and reduce the tendency for strain on the tweeter.
 
If you don't buy these A25's, you might want to look for a pair of A35's (Same great sound, only slightly-fuller with slightly-bigger bass). Both are great speakers.
 
Hey, thanks for the replies. I decided not to go with those a25's, just not sure about the cap situation or rubber treatment. I found another seller on craigslist, closer to me. I went to his house instead and it was an a25 museum, several pairs. The pair I bought sound wonderful and I haggled down the price a bit. I've had a25's before but this set is definitely a keeper.

Thanks.
 
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It wasn't until I got home and eventually removed the grilles (sadly, the cloths did not survive) that i saw something I haven't seen or heard of. I've done a fair amount of research on AK and to my knowledge, no one has really mentioned SEAS drivers with ports on top. One or two may have commented that there were several designs/builds but nothing in particular. I guess the going wisdom is that early a25's had Scanspeak drivers w/ ports on top and later SEAS had ports on the bottom.

Cabinets leftover stock from when they used Scanspeak?
Notice the V notches at the woofer screw holes, my former pair didn't have those.
There is excess sealant sticking out around the tweeter on the left, when I put a finger to it, it's still pliable.
The woofers have the thin, black tarry sealant that I always see, no Mordite or anything like that. They seal looks original to these untrained eyes.
The guy I bought them from didn't do any work on them, perhaps a previous owner switched out Scanspeak for SEAS?
All I know for sure is that they sound rich and lovely, wherever the ports are. I'm thinking of removing cloths from a beat up, non-working pair of KLH 17's and attempting to fit them onto the a25 grilles, no experience there.

I hope a few people see this, a most pleasant mystery to me.

Thanks.
 
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Update:

These unusual a25's sound much better to me than my previous pair. I'm liking the bass, which is rare for me. Having the port on top, away from the woofer seems to make a noticeable difference. With these SEAS drivers, anyway. My experiment trying KLH 17 grille cloth didn't go well, muddied/suffocated the a25. Now I run them "naked", good sound and if I ever get around to an easy cap job, I'm sure the tweets will be thankful.

SEAS drivers, port on top. That's the formula for me.
 
As far as I remember, there were A25's with ports on top as well as ones with the port on the bottom (And if you look on Google Images, you'll see plenty of pictures of A25's with top-mounted ports... Just keep scrolling a bit). You just have a different variation. They look fine to me. Enjoy them and breathe easy.

If you want to know a bit more about them, check out this thread. According to at least one person on there, yours are the early version with Scanspeaks, not Seas.
http://www.audiokarma.org/forums/showthread.php?t=182364
 
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I have a pair and I think that the A25's with the top mounted ports were the first series of A25's...

"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."

Taken from,
http://home.indy.net/~gregdunn/dynaco/components/speakers/index.html


Congrats on getting a great pair of speakers.
 
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