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  1. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Yeah, he said perhaps the batch that I got both tubes had issues, so even though they have tested electronically and with computer matching, things like this don't show up until a decent amount of hours are burnt in (about 50 hours before problems occurred on both original tubes).
  2. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    So in the ongoing saga of my Western Electric 300b, I got my replacement WE300b yesterday, and put them into my HA-300, which has been running dead silent w/ the stock TJ Full Music 300b when no music's playing. Sadly, the left channel tube (the working original WE300b) does have a low-volume...
  3. jambaj0e

    CanJam SoCal 2021 (September 25-26, 2021)

    I went to it, and it was ok. Certainly every other room there's some fool who insisted sitting right next to others without a mask on. And most places do not have access to internet streaming and have a fairly limited selection of songs and/or genre. The real highlights are 3 rooms: Alsyvox...
  4. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    The impedance is at M, which is where my Audeze LCD-3 is happiest at. This is for both XLR and SE, although I only use the XLR.
  5. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    That's what I suspect, too, especially given it affected one channel and the problem followed the WE 300b when I swapped channel and ultimately removed the WE300b completely from the system.
  6. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    I still don't even know how to check the fuse inside, lol, nor would I want to open it myself. And yeah, I didn't have time to swap the 300bs until last night when I had more time. So you think I should be OK to use my new power cable, then? I'd assume if it was bad, it would've affected a...
  7. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Ok, so far so good with the stock TJ Full Music tubes. I really hope that this problem is now behind me and I will get a replacement Western Electric 300b tubes soon. Ugh, so disappointed that this happened, though.
  8. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    @Andykong while I wait for the tubes to cool down, is there still a chance there's something to be checked out internally with the HA-300?
  9. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    The buzz traveled with the we300b tube! I swapped them, and the weird noise traveled to the right channel! On both the headphone and speaker, the noise is now on the right channel, not left! Next thing I'll have to do is take the WE300b out completely.
  10. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    But the thing is, I haven't added anything new into the room in a year. The last thing I added to the system was that power cable that I've since took out. Plus, how could it be RF or ground interference when I didn't experience that the whole morning and afternoon with listening to music, but...
  11. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    So it's still making the buzz, and I turned off my Chord Hugo TT2 right away and it's still there, so it doesn't seem to be the source, nor can I replicate the sound through the TT2's headphone jack. The buzz is also a lot quieter, so much so that I could barely hear it from the Tekton Lore...
  12. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    The hum sometimes fluctuates in pitch and can be intermittent. I can't remember if it change w/ impedance, but volume doesn't affect it, nor does it go away at 0 volume. Strange thing is when I swapped to optical or COAX, the hum is still there. Also, when I use the TT2's headphone jack...
  13. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Yeah, I've unplugged and replugged my amp, swapped power cables, swapped tubes, unplugged and replugged my XLRs and RCAs, took off the RCA completely since they're not what I use between the TT2 to the HA-300, then tried only RCAs no XLR, but still the same issue.
  14. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Sigh, so I'm having problems with my Cayin HA-300 again. This time, I'm getting this buzzy, pitchy hum, almost like buzzy air coming out of a balloon or if you rub your hand across a balloon. I thought it may be my new power cable, but the old one does the same. I changed all the tubes, and it's...
  15. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Oh yeah, it was definitely the ACME that caused it. The tube repair guy said there was a defect inside where two things touched that shouldn't and created a short and white flashed. That caused a high voltage into the resistor. Luckily I only had it on for a few seconds before I turned it off...
  16. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    The other more affordable 300b that I do want to try or maybe you guys should try out too is the TJ Full Music SE Special Edition 300b. There have been several good reviews on it: http://shop.diyhifisupply.com/product/tj-fullmusic-300b-se-special-edition-matched-pair/ TJ Full Music Carbon...
  17. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    I still highly recommend the ACME, especially if you can get it from a more reputable dealer (I got mine from China-hifi-Audio.com, and while it was a great deal, I'm a little wary of them...
  18. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    At least Musictek was helpful enough that when I took it to a local tube amp repair guy here from Westrex, they gave him guidance on what to fix, etc.
  19. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    I have no idea, but the shipping weight is about 76 lbs. Big ol' box and all. Why, what's in Seattle?
  20. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    It is what separates the high-end manufacturers apart, not just the wonderful tech and gear, but the service and support behind it. I wish Cayin could have a bigger presence here in the US just like how Woo Audio has. They both compete for the same set of clientele in the same general price...
  21. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    What about a list of certified technicians, then?
  22. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    OK, do you know if Kevin Bourke from Tube Tek (or Anthony's Electronic Service) out of Illinois is a Cayin authorized tech? He said he is and it's cheaper to ship to Chicago to fix.
  23. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Do you have an authorized technician in Los Angeles? If not, why not?
  24. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Well why can't you get a technician certified in the West Coast then? The United States is huge and shipping across the country for such a large amp is very expensive!
  25. jambaj0e

    Cayin HA-300 Flagship Tube Headphone Amplifier

    Musictek said I could try a local repair shop, too, since it's out of warranty. I have found a reputable local repair in Los Angeles, but they absolutely need the schematics. Can you send me via msg or email that schematics as soon as possible? I really don't want to have to ship it from Los...
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