Author Topic: Tube Comparison  (Read 1473 times)

Offline steve

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Tube Comparison
« on: May 03, 2019, 10:16:01 AM »
I have a quad of JJ KT88s from approximately year 2000. The pins are smaller but supposively new tubes are ok
pin wise.

What I am wondering is has the "sound" changed from between 2000 to now? In otherwards,
if I were to purchase new JJ KT88s, would the sound be different from the old JJs?

Second question, has any one compared the typical $37.00 chinese tubes to the JJ KT88s? What is the sonic difference?

Thanks for any insights.

steve
Steve Sammet (Owner/Designer, SAS Audio Labs, Ret)
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Offline rollo

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Re: Tube Comparison
« Reply #1 on: May 15, 2019, 10:39:23 AM »
  Steve unless a different run or batch the answer is no. JJ's IMHO are quite good overall vs NOS. I found that any inexpensive Chinese tubes are unreliable as well as sonic disasters.


charles
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Offline steve

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Re: Tube Comparison
« Reply #2 on: May 16, 2019, 03:37:43 PM »
  Steve unless a different run or batch the answer is no. JJ's IMHO are quite good overall vs NOS. I found that any inexpensive Chinese tubes are unreliable as well as sonic disasters.


charles

Thanks for the information and heads up Charles. I also like the JJs in my system.

I have been comparing the old JJ KT88s and JJ E88cc input tube, and then flip two switches (in power supply) and then using Winged C KT88s and Bugleboy input tube. Did not know if the new JJs might mess up my adjustments.

I have it where I don't know if I can tell the difference, except maybe in width of sound stage, and crispness. Got to use more selections just to make sure.

Cheers

steve
Steve Sammet (Owner/Designer, SAS Audio Labs, Ret)
"V" 40pf 1 meter 6N Pure Copper Wire ICs,
SAS Audio Labs Test Phono Stage
SAS 11A Perfect Tube Preamplifier
SAS 25 W Near Perfect Reference Triode/UL Monoblocks
2 way test Spkrs, 28hz -3db, to 20khz