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Post by firebottle on Apr 7, 2022 16:44:35 GMT
Trouble is I think the second tweeter is half way to the knackers yard. Will have to do that so they match, there will be plenty on here with OCD kicking in saying 'you can't have them non matching'  |
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Post by antonio on Apr 7, 2022 18:38:54 GMT
Don't worry about about what they say on here  , sure you'll do your best Alan. |
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Post by electronumpty on Apr 7, 2022 21:26:22 GMT
Don't worry about about what they say on here , sure you'll do your best Alan. Yeah,but, Monsieur Batears....🙂 |
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Post by firebottle on Apr 8, 2022 7:09:27 GMT
Success.....   |
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Bigman80
Grandmaster
The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,398
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Post by Bigman80 on Apr 8, 2022 7:27:42 GMT
Success..... Well done Al! |
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Post by pete on Apr 8, 2022 7:46:45 GMT
Success..... Outstanding |
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Post by jandl100 on Apr 8, 2022 9:31:45 GMT
Amazing, well done!
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Post by antonio on Apr 8, 2022 17:22:56 GMT
and yet another WELL DONE from me.
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Post by firebottle on May 11, 2022 9:32:43 GMT
POSTSCRIPTOnce the repaired tweeter was installed it was apparent that things still weren't right. The repaired tweeter was low on output and measuring the still working tweeter showed it had dropped from 4 ohms to 2 ohms impedance. So half way to burned out I guess. The response of course was skewed by the wrong impedance presented to the crossover. So I searched t'web for replacement 4 ohm tweeters and bought a Chinese pair, for little outlay. Once installed it was very apparent that the output of these was far too high and I have been through a few iterations of L pad values to get the level right. Firstly I attenuated the level by about 2.5db but that was still too high, then adjusted for a 4dB attenuation. This is how the Theils were heard at the bake-off. I have now increased the attenuation to around 5dB and things are good.  Generally I think they were well received at the bake-off.
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Bigman80
Grandmaster
The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,398
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Post by Bigman80 on May 11, 2022 12:09:01 GMT
POSTSCRIPTOnce the repaired tweeter was installed it was apparent that things still weren't right. The repaired tweeter was low on output and measuring the still working tweeter showed it had dropped from 4 ohms to 2 ohms impedance. So half way to burned out I guess. The response of course was skewed by the wrong impedance presented to the crossover. So I searched t'web for replacement 4 ohm tweeters and bought a Chinese pair, for little outlay. Once installed it was very apparent that the output of these was far too high and I have been through a few iterations of L pad values to get the level right. Firstly I attenuated the level by about 2.5db but that was still too high, then adjusted for a 4dB attenuation. This is how the Theils were heard at the bake-off. I have now increased the attenuation to around 5dB and things are good. Generally I think they were well received at the bake-off. I found them a bit hard to listen to with that HF level mate, and i wasn't alone in that. However, if you have tamed the HF a bit more and they are more balanced, i'd be happy to have another listen to them. To be fair, they went a lot louder than i thought they would go. |
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Post by antonio on May 11, 2022 15:04:45 GMT
That little Neurochrome sounded very powerful to me, I commented to Alan on that. I would agree the top end sounded 'lively' but maybe it was the room acoustics   |
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Post by firebottle on May 11, 2022 15:26:03 GMT
That 'little' Neurochrome is capable of 110W into 4 ohms, per channel.
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Bigman80
Grandmaster
The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,398
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Post by Bigman80 on May 12, 2022 22:08:06 GMT
That 'little' Neurochrome is capable of 110W into 4 ohms, per channel. It is little in size but it certainly shifted the drivers In The Theils. I sense a separate PSU on the way? |
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, sure you'll do your best Alan.
