Need Help to repair my Sony SS-X7 speakers

[Lee Knatta]

Hi all

Today I fried a tweeter in one of my Sony SS-X7 speakers. It was stupid acting with provisional connectors and my prototype amp that somehow caused extreme noise that made my tweeter die.

I don't know whether Sony will support me and sell me a new tweeter for replacement.

On the backside the tweeter reads:
SONY 1-504-664-11
H 720-6ohm
Made in Norway 24/00

Do you have an idea where to get such a tweeter?

Does anyone recognize this tweeter as a brand X model Y one?

Cone diameter is 1 inch (~25mm).
Magnet has 72mm diameter.
Inner screw mounting diameter is 50mm.
Outer mounting screw diameter is approx 94mm.

I liked the sound of the speakers very much.

Does someone know an alternative to use for the case I can't manage to find the original part?

Attached some pictures.

Every hint and help is highly appreciated.

I hope this won't happen to anyone else.

Thanks,
Lee

[jerome69]

I recognize a SEAS tweeter

THE ART OF SOUND PERFECTION BY SEAS - H0737-08 19TFF 1 ?

or these ?

http://www.seas.no/index.php?option=...=80&Itemid=104 ?
http://www.seas.no/index.php?option=...=89&Itemid=113 ?

[rex.johnston]

Looks like a SEAS 27TFF or 27TDF. Almost.

[Lee Knatta]

The Sonys look very much like the ones from Seas.

Btw: I was wrong. Mounting hole diameter is 92mm.

They have a lot of tweeters that could fit mounting wise except for the terminals. To me they all look alike. What made you pick those two suggested ones? What parameters to look for? (I only once built a speaker and it was a subwoofer. )

Do you think I even could upgrade with new tweeters?
Making the catastrophic mistake into an improvement?

Thanks for the hint! You helped me a lot.
Lee

[rex.johnston]

Norway means SEAS, fabric dome, no rear chamber.

These look to have a different faceplate, look closely at the profile around the hole.

Take the dead one apart and tell us whether there is sticky fluid in the magnet gap.

[Lee Knatta]

I checked for distributors in Germany and found Intertechnik.

The model numbers there are different what makes it very confusing.

But I saw one that has the terminals the way Sony has them.

Lautsprecher Shop Intertechnik - KT25F | Tweeter :: Seas-Prestige :: Loudspeakers ::


Could this be the one that Sony used?


edit:


Yes! Yes, yes, yes! I measured all distances and it seems this is exactly the tweeter Sony used!

Thank you so much. Without your help I probably wouldn't have found out.

[pedroskova]

replacement part...if they have them

[Lee Knatta]

Great resource, thanks!


I took out all four low/midrange chassis to measure their Rdc (which was okay) and took a photo of one.

Does someone recognize this one as well?

Surprisingly they have 8 Ohm impedance and cheapest plastic housing. The magnet doesn't look too powerful to me. Can something like this sell as a single part on the HiFi market?

I like the sound of the speakers very much, except the deep bass. I find the bass to be surprisingly deep but boomy and blurred. That's why I used an active crossover and a separate DIY 15" sub all the years.

I think it was my DIY active crossover that killed the tweeter. The amp that drove them before had a delayed speaker insertion that cut the noise the crossover generated during startup. Before the catastrophe I tested the new amp on the sub channel and without crossover at the full ranges and there it was okay. Only for the sub channel there was a massive turn off thump from the crossover. I will put a speaker relais into the prototype amp ASAP.

The speakers made me curious. I will further take them apart because I like to see their crossovers. Will post some pictures later.

Again thanks to all that contributed here.

Lee

[Lee Knatta]

This is what their crossovers look like.

[Lee Knatta]

And this is what the schematic looks like. I had to guess a lot of component values and they don't make any sense to me. I assumed crossover frequency could be something like 3kHz.