You must have missed the OP’s last post.I did see that. But what we know is that the amp didn't fail- those fuses provide power to the amp, but the amp worked because filter caps in the power supply still held some voltage. That's my assumption that checks all the boxes anyway. We'll know more after the fuses are replaced and the amp tested.
Ground Loop(?) leads to blow speaker
Aloha 'goners!
I'm going to do my best to get the details down here as I am a bit stumped on this one.
I have a Wadia 121 DAC that was recently repaired. The issue was the RCA/XLR outputs produced mostly noise and little music. The headphone side was fine.
As the unit wasn't functioning properly I hadn't had the chance to hook it up and use it. When I got it back and hooked it up there was a nasty ground loop(?) that led to a blown speaker (Thiel 1.6). The buzz produced was the angry bee buzz followed by a loud electrical sounding crack and the woofer was gone. The amp (Creek Classic A53) went into protect mode and I shut it off. I then disconnected the Wadia and hooked up a Mytek Brooklyn+ and there was no buzz. Same cables same outlets same everything except the DAC. I tested the amp and it seems to be ok through another pair of speakers.
At this point I wasn't sure what was going on. I tested 3 different amps with the Wadia and 2 of the 3 buzzed. With the Mytek none of them buzzed. Of the 2 amps that buzzed one of them had a 2 pin connection and the other a 3 pin. The only amp that didn't buzz was a 2 pin Adcom 535 MkII. The other amps were a 3 pin Creek and a 2 pin Carver.
Here is the full chain:
Primare CD31 --> Madrigal AES Cable --> Wadia/Mytek DAC/preamp --> Chord Cobra Vee RCA --> Creek/Adcom/Carver amps --> Tara Labs spkr cable --> Thiel 1.6/B&W CDM1SE speakers
I used the same wall outlets for the DACs and amps. The same interconnects were used between components as well as from the amps to speakers.
I tested the wall outlets with a cabling tester and it said they were wired correctly.
Could there be something else that I'm missing that would be causing this? The only amp I am comfortable with using to test is the Carver as it has a variable level on the front panel.
Any help or thoughts on this would be greatly appreciated.
I'm going to do my best to get the details down here as I am a bit stumped on this one.
I have a Wadia 121 DAC that was recently repaired. The issue was the RCA/XLR outputs produced mostly noise and little music. The headphone side was fine.
As the unit wasn't functioning properly I hadn't had the chance to hook it up and use it. When I got it back and hooked it up there was a nasty ground loop(?) that led to a blown speaker (Thiel 1.6). The buzz produced was the angry bee buzz followed by a loud electrical sounding crack and the woofer was gone. The amp (Creek Classic A53) went into protect mode and I shut it off. I then disconnected the Wadia and hooked up a Mytek Brooklyn+ and there was no buzz. Same cables same outlets same everything except the DAC. I tested the amp and it seems to be ok through another pair of speakers.
At this point I wasn't sure what was going on. I tested 3 different amps with the Wadia and 2 of the 3 buzzed. With the Mytek none of them buzzed. Of the 2 amps that buzzed one of them had a 2 pin connection and the other a 3 pin. The only amp that didn't buzz was a 2 pin Adcom 535 MkII. The other amps were a 3 pin Creek and a 2 pin Carver.
Here is the full chain:
Primare CD31 --> Madrigal AES Cable --> Wadia/Mytek DAC/preamp --> Chord Cobra Vee RCA --> Creek/Adcom/Carver amps --> Tara Labs spkr cable --> Thiel 1.6/B&W CDM1SE speakers
I used the same wall outlets for the DACs and amps. The same interconnects were used between components as well as from the amps to speakers.
I tested the wall outlets with a cabling tester and it said they were wired correctly.
Could there be something else that I'm missing that would be causing this? The only amp I am comfortable with using to test is the Carver as it has a variable level on the front panel.
Any help or thoughts on this would be greatly appreciated.