2. amps-preamps
  3. 194099-1069

I could have started this on the cables thread.....but....

After 24 hours of system operation with music playing, I have concluded that the factory umbilical cable between my Usher P307A chassis and power supply has been a "bottleneck" to my preamps performance...actually, the system performance. I decided to contact Brad, the owner and designer of Revelation Audio Labs, and he graciously designed and built an umbilical cable for me. So far, what I am hearing from this cable, are fireworks! More to come and thank you for your interest in what I have to say. Always, MrD.

mrdecibel
atmasphere's avatar
atmasphere
12,117 posts
 

@mrdecibel The use of an umbilical means that the wiring within must not cause a Voltage drop for the tubes used and it must be bypassed at the preamp end to prevent noise being a problem! If its not bypassed properly, the stray inductance can result in parasitic noise at RF frequencies. So its not a trivial matter.

jl35
4,195 posts
 

I was very happy with the RAL umbilicals on my Pass XP-22 and XP-20 Preamps..

mrdecibel OP
3,139 posts
 

Ralph, hope you are well, as always. These have always been ss preamps I am talking about. The tube preamps I have owned and used have always been single chassis units, if this makes a difference to what you are saying. My best, MrD.

mrdecibel OP
3,139 posts
 

@gbmcleod , @jl35, hope all is well, and thank you for your contributions. My best, MrD.

roadcykler
218 posts
 

It's a wonder that cable doesn't catch on fire or at least have the outer covering swell with all those electrons not being able to flow at the normal speed of electricity. indecision

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