2. amps-preamps
  3. 184663-174651

Need advice

I am new to this and need advice .

I have just become aware of some hiss coming from my preamp, Audio Research LS 2B Mkll. Think it might be caused by the tube ? Current tube Electro Harmonix 6922,

What tube should I replace it with for least noise and best sound?

Is there anything else I need to do ?

aaddmann
ghdprentice
6,965 posts
 

@jjss49 

 

+1

 

Always the first place to start, most likely. With Audio Research gear I don’t tube roll. I’d get a brand replacement or similar. But that is me.

jjss49's avatar
Ag insider logo xs@2x
jjss49
6,612 posts
 

https://www.tubedepot.com/products/6dj8-ecc88

pay for triode matching and low noise graded... have fun

aaddmann OP
5 posts
 

Thank you for your help.

I ordered Electro-Harmonix 6922 EH Gold Pin from Tube Depot as you suggested.

 

aaddmann OP
5 posts
 

More Help!

Received electro-harmonix 6922 gold tube for Audio Research LS2B MKII , now need to know can I just install it, or do I need to set Bias etc?

I read online about bias adjustment and gain adjustment but can't find a service manual online. 

newbee
4,767 posts
 

Just plug it in. Give it at least 24 hours of play time before you reach any conclusions as to 'sound'. 

More to discover