How long will the tube last in the d2o preamp by regular use?

The tube last at least 10 years by regular use and we have replacement tubes in stock.

How long will the tube last in the d2o preamp by regular use?

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    “Our D2O 500 series preamp is reviewed by the Great Pan of Pan60! The result, containing a lot of in-depth technical information can be found at Gearslutz.com”

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