2. amps-preamps
  3. 1285350105

tube choice for Audible Illusions L1

I have a Audible Illusions L1, and it has humming noise on the left channel. I suspect it is the tube. Also, I would like to smooth the sound a bit more. The recommended and current tube I have is 6h23neb. However, I have someone previously recommends Svetlana 6n1p. I would like to try it out, but it says on the AI FAQ that "6NIP tubes should not be substituted as they require additional filament current and their use will compromise performance."
What does compromise performance means? Does it mean the tube life will decrease? But it won't do any damage on the unit, am I correct?

Also, from the tube store, I can't specify the brand. Is it important to order a specific brand?

Besides the 6h23neb and 6n1p, is there other suggestion that will help smooth out the sound, or make it less harsh?

Thanks.
gte357s

Showing 4 responses by audioconnection

audioconnection
1,270 posts
 
Go inside the unit and make sure the Cap dip switches are set to on
the amp you are using may better interface this way.
Also call AI with your serial number and they will
get you the right tubes for that unit
Best Johnnyr
audioconnection
1,270 posts
 
Greetings Gte357s
What amp and cd player speakers are you using
the dip switches for Caps on should sound more neutral
have you done this yet?
Its easy don't worry you cant hurt anything
just mute the pre amp when you do it
Did you invert both speakers Plus with the Minus as in the manual?
Please let us know what you hear.
Best Johnnyr
audioconnection
1,270 posts
 
You could have either a bad interconnect on one ch
try swapping them.
A transformer from a CD player or something else located
just inches under or over the pre amps shell could be provoking a hum.
Try moving and or relocating the closely located culprit.
Best Johnnyr
audioconnection
1,270 posts
 
Greetings GTE 357
Trying to save money is sometimes tough.
I would get the serial number so we can have AI get you a low noise gain matched set for that circuit.
This is what I have found to work best. Johnnyr
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