2. tech-talk
  3. 187022-6156

I’m getting a hum in my integrated tube amp and it’s bugging me alot

Hi - first of all, here’s my system:

- Rogers High Fidelity EHF-200 mkII integrated tube amp

- Magico A5 speakers

- Merging NADAC + Power DAC

- Audience T2 power conditioner

- Purist cabling

I love the sound of my system. BUT…….I have been noticing a hum after about 10 minutes of use from my amp. There are two switches on the amp - POWER & OPERATE - that need to be turned on in order to listen to music. (The Power switch needs to be turned on about 30 seconds prior to switching on the Operate switch). With both KT150 and KT88 tubes (all matched), after about 10 minutes I hear an audible hum from the amp that is apparent from my listening position about 10 feet away. If I turn off the OPERATE switch, the hum disappears (but of course, then I can’t listen to music). I have contacted Roger (the company owner) who said it was noise from old tubes. But my KT88’s have less than 100 hours on them and they hum as well as the KT150’s (maybe a few db’s softer than the 150s’). 

 

Does anybody have any ideas about what causes this and how it might be fixed? Is this an issue that is endemic to tube amps? FYI - if this requires new tubes, then I need to switch back to SS as I’m not willing to invest approx $800/year in new tubes. 

 

I turn to the great wisdom of this forum to help.

 

Thanks - Matt

mwsl
deep_333
1,360 posts
 

@roxy54 ,

#1 He doesn’t have the right amp for that speaker (not to mention a whack a doodle hummer for the ’small price’ of only 16k!)...could be that he went tubes after the Magico started brutalizing ears. Nevertheless, the magico needs serious space heater liquidness to find the balance for --> [not held back + not tearing ears off].

#2) PassLabs will fix anything for free for the life of the amp (best customer service and service record in the history of this biz, i.e., gotta give credit when due).

P.S i don’t even own a Pass currently (lest i came off as a Pass fan boy). But, that’s the kind of amp that tends to work for Magico guys, ime.

roxy54's avatar
roxy54
7,977 posts
 

@deep_333 

That all may or may not be true, but the way you addressed him made you sound like a thug.

deep_333
1,360 posts
 

@deep_333

That all may or may not be true, but the way you addressed him made you sound like a thug.

@roxy54 , No...read it again, you invented it all in your head...But, that sly passive aggressive forum tactic of yours wanting to call me a "thug" and get away with it....Well...the way you addressed me made you "sound like a passive aggressive li’l ho". Now, go cry a river to you know who...

roxy54's avatar
roxy54
7,977 posts
 

And now you proved it.

2psyop's avatar
Ag insider logo xs@2x
2psyop
1,558 posts
 

deep_333 

You are the reason people stop coming to forums. Arrogance and stupidity just pour out of your mouth. You strike me as the type of person that just likes to shock people with your comments to get attention, like a child. My guess is that in reality, you're an idiot.

More to discover