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

Related products

• Low noise stereo microphone preamp , D2O Stereo
• 500 series microphone preamp , D2O Tube/Fet 500 series
• Low noise discrete microphone preamp , D2O Mono

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“Voor mij was de mic te gek, ik probeer m donderdag en zaterdag weer ! Heel erg bedankt voor jullie moeite.”

Danny Vera