Need help with Cyber Consonance preamp

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matomehb

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I am using the Cyber Consonance preamp with four 6SN7 tubes and a rectifier valve. In recent days I have to increase the volume to achieve reasonable sound levels....and last night it got worse and the sound quality is also affected.

Do I need to be worried about valves having reached their end days and need replacement?

Or is it perhaps something else?

I am not familiar with tube equipment since this is my first valve preamp.

Please advise...
 
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