Help! I’ve foolishly blown my Tannoy Stratford speakers. Looking for replacment drive units and crossovers. Pref UK. All advice welcome.
Welcome to the forum!
It's always useful to see an image of the subject:
You say you've "blown" the speakers - can you supply precise details?
It's always useful to see an image of the subject:
You say you've "blown" the speakers - can you supply precise details?
The 8" bass/mid driver is designated 2048. Tannoy say that the T/S parameters for this driver no longer exist.
The crossover circuit is very simple with the bass/mid being driven direct and the horn tweeter being driven via a simple 12dB/octave high pass LC filter with resistor attenuation.
The crossover circuit is very simple with the bass/mid being driven direct and the horn tweeter being driven via a simple 12dB/octave high pass LC filter with resistor attenuation.
Yes. Foolishly, I drove them very loud for a party and suddenly all went quiet. No sound from main drivers and just little tweets from the little ones. Smoke from one of the cabinets. 😕
No apparent damage to the cones.
Since the main drivers are powered directly from the amplifier, you would appear to have burnt out their voice coils.
I can only see one replacement 2048 drive unit for sale on ebay at the moment.
EDIT: The Stratfords are rated at 93 dB at watt at metre so you really must have been tanking them!
I can only see one replacement 2048 drive unit for sale on ebay at the moment.
EDIT: The Stratfords are rated at 93 dB at watt at metre so you really must have been tanking them!
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You say the tweeters are still tweeting so the crossover appears to have survived. (The tweeters are unlikely to sound loud when the main drivers are not there to provide the bulk of the music.)
You could inspect the crossover resistor for signs of overheating and/or use an ohmmeter to confirm it still measures 7.5 ohms.
You could inspect the crossover resistor for signs of overheating and/or use an ohmmeter to confirm it still measures 7.5 ohms.
Thank you.
These were low-cost domestic speakers and not to be confused with the more sophisticated Tannoy models
Rather than risk good money on second hand driver replacements, you'd be better off investing in a new pair of speakers.
These were low-cost domestic speakers and not to be confused with the more sophisticated Tannoy models
Rather than risk good money on second hand driver replacements, you'd be better off investing in a new pair of speakers.
And given we are diyers, build your own. In the UK Stefan (KJF Audio) sells fast-psks if that part is difficult.
dave
Just a final thought: Check the flexible tinsel leads at the rear of the main driver which carry the signal from the driver terminals into the cone/voice coil assembly. It's just possible that large excursions of the cone have broken these leads.
If the leads are intact, measure the DC resistance across the driver terminals. It should be around 5 ohm. If you read infinity it will confirm that the driver voice coil is open circuit.
If the leads are intact, measure the DC resistance across the driver terminals. It should be around 5 ohm. If you read infinity it will confirm that the driver voice coil is open circuit.
I understand. But I was perfectly happy with the original drivers. I’m really sorry I overdrove them. Guess I’ll have to save up.