Guys, I have a very lack of knowledge when it comes to digital audio so please don’t shoot me in your replies. I bought an original Bifrost 2 about 4 years ago and have not really used it much to be honest. However I try it as the DAC by connecting it to the digital out on my CD player (Hagel...

I guess that I am pretty late to the party in regard to some of these tube combinations being used in the Pendant. Having always been a “music first” guy I start listening to one track and end up listening to the whole album. That’s OK but not exactly analytical if it’s tubes that you are trying...

Thanks for that. I will get on the hunt for those Funkwerk tubes. They all seem to be sold out of Eastern European countries which makes it tough to find that “reputation seller”.

I have a question for the tube gurus in this thread. My Pendant (non SE) has always had a very low level hum and nothing that I have tried has ever made an impression on it, let alone fix it. In the end I elected to listen to the music and it really has not bothered my listening experience...

Welcome aboard. You can tube roll to your heart’s content with this amp. The only thing that you should always remember is that it’s the music that matters. As Robert Hunter wrote “If you get confused listen to the music play” (Franklin’s Tower). Enjoy.

Thanks for the reply. It’s not the tubes because I have tried any number of those. Currently have tung sol in the EL84 slots and a vintage brimar 12au7 as the small tube. I have tried everything and just wondered if anyone had tried getting rid of the DC from the wall wart. I have the unit...

The hum is in the headphones not a general amp hum. Sorry if I wasn’t very clear there. It’s not ruining the music or anything like that but on high Z it’s audible when the unit is switched on. Low Z helps and that is what I have been using. It would be great to totally get rid of it.

I have a pendant (not the SE version) and have had a minor hum since the day that I first turned it on. I have tried a lot of things at Zach’s and others suggestion. Wondered if there was any possibility that it could be DC current. IFI (and others I guess) sell “DC filters”. Wondered if anyone...

My unit has the low grade hum that you will find discussed in this thread so I went with a Sylvania 5751 based on it being the tube that was the quietest. In fact that hum is not really an issue at all with that tube and I am just listening to the music now.

Thanks for your swift response. I will try to find a Sylvania 5751 at a reasonable price. In the meantime I am using either an RCA cleartop 12AU7 or Genelex Lion goldpin 12AU7. Changing out the JJ EL84s for Tungsrams has been a major improvement especially in terms of the hum issue in my unit...

I have a tube question that I have read quite aa but about on the forums but am still confused about. Can you use a 7058 tube as the output tube on the pendant?? It is a 12ax7 family tube but does not work in some preamps apparently. I tried it in the Pendant and it did work. The sound was...

I have a set of what are known as “Allen keys” (not sure if that is a US term or if it is universal) which I bought years ago for a few dollars in the local hardware store. There was a fit for all of the screws in that little kit. Realize this is a poor response and would think that you will get...

Not more than 9 o’clock when listening to any of my headphones (Aeolus, Mr.Speakers Ether flow1.1, HD650) via Hi Z with a 12ax7 or 12au7. Maybe 10 o’clock with the LCD2 on Low Z. The hum in my unit has about gone with 30 hours on it. Still a slight noise with the Aeolus but almost silent with...

I have had good experience with the Genelex Gold Lion tubes in general. I used them in my preamp where they replaced JJs in the 12ax7 positions. It was a nice improvement. Also tried one in the pendant. The sound was good but it didn’t get rid of the hum. The 12au7 does significantly reduce the...

Aeolus open back. Everyone says that the Verite/Pendant combination is the one to have. It’s a money thing for me. The Verite were over budget. Maybe some day.

I am happy to report that replacing the 12ax7 with a Genelex Gold Lion 12au7 has reduced the hum in my unit. There is virtually no noise from the low Z output and a significant reduction from the hi Z. In fact when the A/C kicks on that is what I can hear rather than any hum. I just put NOS...

Great to see a dedicated thread for this amp. Thanks for starting. I have just received the amp and do have the hum issue. Have only about 15 hours on it so far so will be giving it a chance to burn in and lose that hum before considering anything further. Zach actually suggested using a 12au7...

Sandy Denny. Rhonda Vincent.

Robert Earl Keen - The Bluegrass Album.

A Pink Triangle. Wow, had not seen one of those for years and years. Way back when I listened to a Pt verses a Linn Sondek LP12. The PT was better in every way and I bought it, never to be sorry about that decision. The PT folks, who had a sense of humor to say the least, used to talk about...

Yep, it's definitely just an issue (the hum that is) of "ageing the 6sn7" and everything goes totally silent. I bought a pair of Sylvania Chrome Tops that are most definitely used and they are both totally silent. All others can be made to go silent by leaving them in and the unit on for 48...

I can confirm that removing the back tube and leaving the unit on for 48 hours (no signal, just turned on) will make the 6SN7 (front tube) go totally silent. Kind of a pain but the way to go. This amp is an outstanding bargain so it's well worth taking the time. Silence is golden as they say.

They have now been cooking for 72 hours. There is still a (much smaller) hum and it has gone far left. Think this is the answer. Hope that every tube is not going to need this treatment. Thanks for your input/advice.

I have tried to read everything that I can find about the DV336se and tube rolling. My unit came with a hum in the left channel and has gone silent after about 20 hours, but only with the 6SN7 that came from the factory. The others that I have (Elecro Harmonix, Electro Harmonix gold pin and Tung...

There is not even one mention of "Tempest" in this thread. It's actually a very decent album and the title track is a very fine song with excellent lyrics. There are several mentions of Mobile Fidelity versions (reissues) and I have to tell you guys that I can't get my head around the vinyl...