I had a similar issue when I first got into tube amps and it ended up being a bad power tube. I got some great guidance in this forum. "Before you do anything else: Next time you hear the crackle, tap each of the tubes in that channel with the eraser end of a pencil. It the sound gets worse, or disappears- you've found your culprit. Start with the driver/phase splitter tubes, as those usually generate that type of sound when faulty." Came from Rodman99999. It wasn't the driver/phase tubes, but a KT88 power tube, but the advice lead me to a quick discovery of the problem, and of course to the store to buy more tubes! Good luck.
"Crack" sound in left speaker tube amp
Hi everyone,
I'll try to be as precise as I can be, but I'm not a native english speaker.
First of all, here are the specs :
Power tube Amp - PrimaLuna Prologue Five
Tube Preamp - Shanling MC30
Scandyna "The Drop" Speaker + "The Ball" Subwoofer
Since a few weeks, I can hear a "craking" sound on my left speaker everytime I switch on the Power Amp. I know the problem comes from there because if I connect the speakers to the Shanling MC30 only, the problem doesn't appear.
What does it sound like ? Well, it's like if you unplug a jack from a switched on amp, you know ? This harsh sound that feels like something is tearing apart... When it happens, the speaker seems to shrink in, then out, following this noise, and the sound gets a little lower, mushy.
The noise often occurs some 5-10 minutes after the Power Amp is on, as if it came only after it had heated up. Then it happens every 5 seconds perhaps. And everytime it sounds really scary..
I've tried everything so far : I unplugged everything but it's still the same...
I don't know what to do, I didn't come accross anything like this on any forum. Is it a known issue ?
I hope someone here will have a magical answer ; I always receives great help from you guys !
All the best.
Franz
I'll try to be as precise as I can be, but I'm not a native english speaker.
First of all, here are the specs :
Power tube Amp - PrimaLuna Prologue Five
Tube Preamp - Shanling MC30
Scandyna "The Drop" Speaker + "The Ball" Subwoofer
Since a few weeks, I can hear a "craking" sound on my left speaker everytime I switch on the Power Amp. I know the problem comes from there because if I connect the speakers to the Shanling MC30 only, the problem doesn't appear.
What does it sound like ? Well, it's like if you unplug a jack from a switched on amp, you know ? This harsh sound that feels like something is tearing apart... When it happens, the speaker seems to shrink in, then out, following this noise, and the sound gets a little lower, mushy.
The noise often occurs some 5-10 minutes after the Power Amp is on, as if it came only after it had heated up. Then it happens every 5 seconds perhaps. And everytime it sounds really scary..
I've tried everything so far : I unplugged everything but it's still the same...
I don't know what to do, I didn't come accross anything like this on any forum. Is it a known issue ?
I hope someone here will have a magical answer ; I always receives great help from you guys !
All the best.
Franz