All tubes come with a full 30 day, unconditional, no questions asked, money back or replacement satisfaction guarantee!

You are purchasing one "Platinum Plus Grade" tube. This means that the plates are very tightly matched on a new, modern, digital, calibrated MAXIPREAMP2 within 5%. 

Please see our other listings for "Silver, Gold and Platinum" tubes. Silver Grade tubes are matched within 20%, Gold Grade tubes are matched within 15% and Platinum 10%.

The Gold and Platinum tubes are recommended for more critical applications such as your preamp and phono stage.

Please email with any questions and/or concerns.

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