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

Test scores will average between 90% and 95% of NOS values.

Individual test scores will be written on the new boxes that you receive with your tubes.

These tubes were carefully screened by the manufacturers (Baldwin, Conn, Wurlitzer, Lowery etc.) and specially selected for their low noise and microphonic characteristics. This makes them ideal for your preamplifier and phono stage applications.

You are purchasing a "Platinum Grade" matched pair of tubes. This means that the plates are very tightly matched on a calibrated Hickok TV-7 or 799 within 5%

Please see our other listings for "Silver, Gold and Platinum Plus" tubes. 

Silver Grade tubes are matched within 15%, Gold Grade within 10% and Platinum Plus 1%.

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

To purchase more than one pair, when available, simply change the number in the quantity box which is located just above the advertised price.

Please email with any questions and/or concerns.

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