tube bias question

I would give Alfred at Hi End Electronics a call or an email, he sells them. I’m sure he will set you straight. If its anything like a VAC PHI 200 amp then the red light should not be on while music is playing. VAC’s instructions are warm amp for at least 10 minutes, mute the preamp then turn bias adjustment until the red light just goes on then back off the adjustment so the red light just goes off. Hope this helps.

Thank you, good advice, I bought the unit from Alfred, I will contact him!

No problem. Correction, the red lights should be off with no music and should beat with music on the VAC. I bet Alfred will answer you tonight. 

@rpeluso,your manual should have this information, or check with Lyric, they are very communicative.  My personal unit (140 mk2) mentions turning the volume all the way down, and there should not be any incoming signals, switching to the bias mode and turning the screw till both LEDs light up.  So I'm not sure if it's a good idea to pass signal through while biasing.  Unless different models have different biasing procedures...