How to make your Dynaco A25 or A25XL left and right handed......

Wayner · « **on:** 6 Oct 2014, 08:51 pm »

You see, it's all a matter of geometry. You make a pattern that is symmetrical in both the horizontal and vertical planes, cut it out, rotate it 180° and glue it back in. You only need to do this to one speaker.

Wayner

orthobiz · « **Reply #1 on:** 6 Oct 2014, 11:26 pm »

Cool. Some kinda scroll saw? Doesn't look like a Dremel job...

Didn't you redo the crossovers way back when?

Paul

Wayner · « **Reply #2 on:** 7 Oct 2014, 12:28 am »

Just used my old jig saw. The caps are original and sound excellent. They are within tolerances, so no need to replace them.

HAL · « **Reply #3 on:** 7 Oct 2014, 12:42 am »

Interesting, as the pair of Dynaco A25 and A25XL I have are mirror image pair from the factory.

dB Cooper · « **Reply #4 on:** 7 Oct 2014, 01:15 am »

Every time I see a pair of A25's I feel the same sort of nostalgia some associate with, say, a '76 Camaro

Wayner · « **Reply #5 on:** 7 Oct 2014, 01:50 am »

Quote from: HAL on 7 Oct 2014, 12:42 am

Interesting, as the pair of Dynaco A25 and A25XL I have are mirror image pair from the factory.

They are almost never seen as mirrored pairs. If you have a pair, it is a rarity. They are always seen with the tweeter in the upper right hand corner. This was the practice back in the old days. ARs, Advents, even JBLs were always this way. If you listen in near field like I do, this is a problem.

Mark Korda · « **Reply #6 on:** 7 Oct 2014, 02:29 am »

Hi Wayner,that was a cool idea. Why did the speaker builders of the 70's put the tweeter on the right side? I. know one thing, the terms of audio like imaging were not used yet in the reviews until the early 80's. Adrian Monk would have been a plus to Hafler and Laurent in terms of speaker design.Wayner it's good to hear from you......Mark Korda

Wayner · « **Reply #7 on:** 7 Oct 2014, 04:02 pm »

Pretty much finished:

Wayner

dB Cooper · « **Reply #8 on:** 7 Oct 2014, 10:26 pm »

Quote from: Mark Korda on 7 Oct 2014, 02:29 am

Hi Wayner,that was a cool idea. Why did the speaker builders of the 70's put the tweeter on the right side? I. know one thing, the terms of audio like imaging were not used yet in the reviews until the early 80's.

I remember hearing the term 'stereo image' when I caught the audio bug, well before '80, although probably more in the 'sublective' press (Stereophile, TAS etc) than the 'how many buttons' mags (Stereo Review, High Fidelity).

Wayner, those are XL's, right?

Wayner · « **Reply #9 on:** 7 Oct 2014, 10:35 pm »

That they are my friend.

Wayner · « **Reply #10 on:** 10 Oct 2014, 02:36 pm »

Here is what a 38 year old cap (8 mfd) measures in the Dynaco speakers:

No need to change caps.

Wayner