Genalex 
I let the tubes burn in for about 100 hours and they work great for me, the bass is dense, the mids are brilliant, the treble is excellent, clean. It's hard to find a better one. I have a Cayin CS 88 A amplifier, I also replaced the tubes in the preamp with Tung-Sol, which Audiophonics also offers, specifically Tung-Sol 6SN7GT and Tung-Sol 6SL7GT. Great combination for this amplifier. Thanks Audiophonics for the fast delivery, very well packaged :)
  This review has been posted for GENALEX GOLD LION KT88 Platinium Tetrode Tubes (Matched Quad) I let the tubes burn in for about 100 hours and they work great for me, the bass is dense, the mids are brilliant, the treble is excellent, clean. It's hard to find a better one. I have a Cayin CS 88 A amplifier, I also replaced the tubes in the preamp with Tung-Sol, which Audiophonics also offers, specifically Tung-Sol 6SN7GT and Tung-Sol 6SL7GT. Great combination for this amplifier. Thanks Audiophonics for the fast delivery, very well packaged :)
 
  
  
  
  
  
  
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