Dear all, when opening loudness and bass one of my Ditton 33 woofers starts cracking and distorting. I checked amp and channels to see whether the problem could be up streams but no, seems to be the woofer. Question: Where could the problem be and is it repairable (i could try to turn the woofer 180 deg and see) ? If not, any good replacement woofer ? I tried to Google but did not find any info for a modern replacement. Thank you.
I would inspect the rear spider (corrugated suspension) to check it is securely glued to the speaker basket and speaker cone/voice coil former - see attached cutaway.
I presume you will already have checked that the speaker cone is securely fixed to the front roll surround.
Unfortunately, I don't know of a modern equivalent of the Ditton 33 woofer.
I presume you will already have checked that the speaker cone is securely fixed to the front roll surround.
Unfortunately, I don't know of a modern equivalent of the Ditton 33 woofer.
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If the surrounds have gone 'bad' you can probably replace the surrounds, or have someone do it for you (Musical instrument shops do a lot of re-coning, re-surrounding). I have a couple pairs of Ditton 44 12" woofers (don't ask) and while one pair still has good surrounds, the other pair are in desperate need of having new surrounds fitted.
Could I make a suggestion here?
Simply run the broken Celestion 33 speaker upside down! Or sideways.
This will eliminate voice coil rubbing as the source of your problems... 10" paper bass, 5" paper midrange and 1" mylar tweeter. All closed box.
After that, I would suspect a broken solder connection in the crossover. A visual inspection always helps. Maybe the back panel is rattling due to dried up glue?
Alas, sometimes it is better to buy a new one. Nothing lasts forever. These speakers are 50 years old.
Simply run the broken Celestion 33 speaker upside down! Or sideways.
This will eliminate voice coil rubbing as the source of your problems... 10" paper bass, 5" paper midrange and 1" mylar tweeter. All closed box.
After that, I would suspect a broken solder connection in the crossover. A visual inspection always helps. Maybe the back panel is rattling due to dried up glue?
Alas, sometimes it is better to buy a new one. Nothing lasts forever. These speakers are 50 years old.
Dear all, THANK YOU so much for th time to reply. Great suggestion really. So I will first try to put the speaker 90 deg and 180 deg to see wether the coil is rubbing and if so turn the driver. If not, I open and inspect the driver and x-over. I have have it right in mind, I soldered my crossover some years ago and added new components, maybe something go loose. And then yes, last ressort would be to replace or find a new old one.