Tubes Asylum

RE: Following, and also my impressions (and JJ's) FWTW . . .

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AbeCollins

A

In Reply to: RE: Following, and also my impressions (and JJ's) FWTW . . . posted by JoshT on March 13, 2023 at 14:38:24

Thanks for summarizing the sound of the various JJ tubes, and for the link to their website. I have the JJ 6CA7 back in my CM and I'm liking them more now than what I heard initially. They seem to have a richer sound overall than my EH 6CA7. I tried the KT120 again too. None of these are bad sounding tubes but the KT120s seem tighter (faster?), a little less robust or rich, but powerful and snappy.

If the KT77 offers fatter bass, I might have to try those out. I enjoy a fatter more robust sound when it comes to tube amps.

Follow Ups:

RE: Following, and also my impressions (and JJ's) FWTW . . . - JoshT 20:46:14 03/13/23 (3)
Have you set your CM to 4 ohms or 8 ohms? I know the former sounds tighter than the latter, which is why I ask.

I switched mine from the 8 ohm setting to the 4 ohm setting a few years ago to run mine with a pair of vintage Ohm Model L speakers, which are 4 ohm nominal, and it was a noticeable improvement (the Model L has great deep bass for its size but can be a bit loose, and the switch tightened it up without thinning it out).

I figured I'd want to switch back to the 8 ohm setting when I paired it with the Heresy IIs since they're a bit bass light, but actually they've never sounded fuller or deeper so I'm not touching the setting. And that's a good thing because it's a PITA to do so with that amp. ;-)
___
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- RE: Following, and also my impressions (and JJ's) FWTW . . . - AbeCollins 09:49:22 03/14/23 (2)
  I tried the 8-Ohm and 4-Ohm taps when I initially setup the amp over a decade ago. I decided that my CM sounds better overall on the 4-Ohm taps with my 6-Ohm nominal Tannoys.
  
  One channel was easy to do but the other side was very confined and difficult to reach. I believe Rogue added a Triode/Ultralinear switch in newer models but still no 8-Ohm/4-Ohm toggle.
  - RE: Following, and also my impressions (and JJ's) FWTW . . . - DrN 09:55:40 03/16/23 (1)
    I am following along with all this tube info. Good stuff! My CM2 is not going anywhere.
    Mine was set to 4 ohms because my Usher speakers were 4 ohm. Just changed it back to 8 when I got my Fritz Carrera Be's, 8 ohm min 6 ohms. They have a benign impedance so back to 8. Yes it's terrible changing the CM2 over. Mark needs to put in some kind of switch!
    Abe,Josh keep your observations coming.
    
    Edits: 03/16/23
    - I have not tried the JJ EL34 types...-.. - Mendel 14:52:27 04/02/23 (0)
      but I can put in a good word for the JJ KT77. A nice sounding tube in my Rogue Stereo 90, although I would not call them "rich" sounding. More a linear sounding tube with nice detail, but with a little more midrange bloom than the Tung Sol KT120s.
      KT66 the best sounding tube in that amp in my opinion.

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