[JBL-freak]

Hello,

Last week i bought a pair of Dynaco's on Dutch Marketplace and much to my astonishment i discovered i didn't buy Dynaco's from the A 25 series but  unknown types. The outer measurements of the enclosures are quite different from an A 25.
The measurements are high about 19,75"; wide 12" and deep 9". Besides this the tweeter is in line with the woofer, just like the Dynaco A-10 loudspeakers.
I know there has been a Dynaco A-100 as well and this speaker has its tweeter in line with the woofer. When opening the enclosures i learned a Seas 25 F-EW woofer was used. The cross-over is a simple 12db slope using a 8 mfd cap and a .(75 mh coil (I think). I have my doubts about the tweeters which were used, although they fit exactly. The tweeters have a fabric protection cap (about 2,5") and it looks if there is a dome tweeter behind the fabric. The outer ring is chrome plated and the tweeters are about 4,5".
Can anyone tell me what kind of Dynaco's i bought ? I would be very pleased if anyone could help me in this matter.

With kind regards,

Jan Slagman
The Netherlands

[Bill Thomas]

Hello Jan,

     Perhaps this website can help you identify the speakers in question:

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

Hope this helps.

Bill Thomas

[Wayner]

The woofer is right, but the alignment is wrong. A25's tweeters were always offset from the woofer. If you can remove the tweeter, it might say H087. That is from an A25. If is says H086, it may be from an A25XL, but of a later vintage and perhaps made in the USA. It would have a velcro attached grill.

Wayner

[JBL-freak]

Hello Friends,

Thanks for your input. I really appreciate your help. I think i have bought a couple of Dynaco A 100's with the wrong tweeter, although the A 100 woofer seems to have a different dustcap. A text above the loudspeakerterminals at the backside tells me the speakers were made in Blackwood. There serial no's are: 9659 and 8924. I will try to make some detailed photographs and post them on this forum.

I can't find any information concerning the Dynaco's A-100. I only found an advertisement on the internet, but that site is not working at this moment.

With kind regards,

Jan Slagman
The Netherlands

[Wayner]

That is the later US version of the A25XL.

Wayner

[JBL-freak]

That is the later US version of the A25XL.

Wayner

Hi Wayner,

Thanks for your input. I think it will be hard to figure out what type Dynaco loudspeakers I bought. The tweeter is protected by a fabric dustcap and it has a chrome plated surround and it fits exactly. I have noticed it ain't that easy to find detailed information about the Dynaco A 100 loudspeakers. When the speakers aren't A-10's (and believe me they aren't) then they have to be the Dynaco's A 100 because as far as i am informed they are the only two Dynaco loudspeakers with tweeters and woofers in line. Strange !!! By the way, did the A 100's have the same woofers (Seas 25 F-EW) and the same crossover networks (a simple 12db slope using a 8 mfd cap and a 75 mh coil ?)

With kind regards,

Jan Slagman
The Netherlands

[Wayner]

Jan,

I've seen these speakers for sale on Ebay. The cabinets are different but I think the driver compliment was the same as the A25XL. I don't know if I ever heard of it marketed as an A100, however. I'll try and do a little more research later, also the A25XL had a 8 mfd cap with a .75 mh coil. It also has a 3 step Zobel resister ladder on the tweeter. Does your speaker have a 3 position rotary for tweeter level?

Wayner

[JBL-freak]

Hi Wayner,

No, my Dynaco's don't have a three step attenuator. I can choose what position i want.

With kind regards,

Jan Slagman
The Netherlands

[Wayner]

Here is what my A25XL's look like. If your tweeter doesn't look like mine, then I give up. I don't know who or what it is.



Jan, maybe a picture would help.

Wayner

[JBL-freak]

Hi Wayner,

Thanks for your reply. In the meantime i know i have a total wrong tweeter. This tweeter has nothing to do with Dynaco, although it doesn't sound that bad. In my opinion i have a Dynaco A-100. By the way i only bought the Dynaco's for nostalgic reasons. Wayner have a look at:

http://www.usedottawa.com/classified-ad/6688398&category=stereo-speakers

By the way my favourites are vintage JBL loudspeakers.

With kind regards,

Jan Slagman
The Netherlands.

[Wayner]

Are those pictures in the add yours? That is the Seas H086 tweeter, but the woofer is not an original. It does have a different dust cap, but the flange is not right either. Either this model has had a driver change somewhere during manufacturing, or someone blew-up the originals and replaced them with something that just happened to fit.

Wayner

[JBL-freak]

Hi Wayner,

Thanks for your information. You just solved the problem by what you stated in your mail. That was exactly what i needed to know about my Dynaco's. My Dynaco's have the original Seas 25 F-EW woofers, but the wrong tweeters, but these tweeters don't sound bad at all !
Looking at that advertisement i thought these were the original woofers, because i had never seen the Dynaco A 100's before. My Dynaco's have four holes in the front, just like the Dynaco A 100's, to install pegs to hold the clothing. Wayner can you please tell me what's the crossoverpoint between the woofers and the tweeters ? The Dynaco's are standing next to my JBL 4312A Control Monitors.
Thank you very much Wayner i really appreciate your help. Have a look at the restoration of my JBL SA-600 integrated amplifier from 1966.:

http://www.hififorum.nl/index.php?topic=10420.0

With kind regards,

Jan Slagman
The Netherlands