How to replace a tweeter if the specs are unknown?

[jkesselman]

I have an old pair of speakers and I think that the tweeter needs to be replaced. Sounds still comes out but there is a "buzzing" with high frequency sounds.

The speakers are QLN and the tweeter is 2.5cm. The markings on the back say "Luxor Briljant" 2.5 cm 1458.

I can't find any reference to their specifications on the net. How do I go about choosing the correct replacement? Any ideas?

Thanks

Jack

[mjf]

hello.
are there very old electrolytic caps in the frequency-network?have you tried to change them to new ones(bipolar type)?
greetings............

[mjf]

hello.
sorry "my english".
freq.netw.=crossover netw. , bipolar=non polarised
greetings..............

[jkesselman]

Hi,

Thanks for your response.

Are you saying that the old capacitors could be the cause of the "buzzing" that I am hearing and that I may be able to solve the problem without replacing the tweeter?

That would be great. I think I will try to replace the capacitors before I try to replace the tweeter.

Let me know if this is correct.

Thanks for you help.

Jack

[mjf]

hello.
if the speakers are not damaged(rent in a cone or so),there is a chance to repair these .i presume there is a np-electrolyt in the signalpath(and not a foilcap).
if this doesn't work -there is a great chance the speakers are bad.and the new caps can be used with the new speakers.
greetings...........

[mjf]

or sometimes only a mechanical flaw:when a screw is loose........

[jkesselman]

Thank you. I will look into tryng to replace the capacitors and let you know how it goes.

All the best

Jack

[Cal Weldon]

Swap the tweeters around first to see where the problem lies before replacing anything. A buzz is usually either from the amplifier or as mjf says, there is something loose. If the coil is damaged you will hear a scratching kind of sound.