Currently Being ModeratedNov 25, 2012 6:08 AM (in response to rsto10)Re: DT25 - Loud, random pops and crackles???
I've got the same problem with my DT25. It's definitely the tubes. I've reseated them with no help. I've seen this issue on other threads that recommended replacing the tubes (Mine are Electro Harmonix EL84EHs, made in Russia) with another compatible kind that fixed the problem, but this amp is new (less than 90 days) and I don't want to pay to fix a defect in manufacturing. Before I go there, can anyone share a better tube that will work with the DT25 combo?
Currently Being ModeratedNov 26, 2012 11:00 AM (in response to rsto10)Re: DT25 - Loud, random pops and crackles???
My DT25-112 recently started making weird noises. Kind of like somebody crumpling a sheet of paper under a blanket...I took it all apart, reseated the tubes, cleaned jacks and connectors. tapped everything with a plastic chopstick. Couldn't figure out what it was.
I had replaced the power tubes earlier in the year when one of them started acting up. This time I tried replacing the phase inverter tube (the only 12AX7 in a DT25) and the problem went away!
The original tube in my amp had no brand, it just said 12AX7 / China. I replaced it with a Sovtek 12AX7 and it sounds just fine. Because this isn't a preamp stage, it doesn't have to be a perfect tube, but sometimes tubes can get noisy.
If you have a spare 12AX7 lying around it doesn't hurt to give it a try.