For sale I have a very rare pair of tubes from the 300B family. Ayon 32B vacuum tubes with no more than 20 hours of use. Were purchased new and then sold with a Mastersound 32B integrated amplifier. UPS destroyed the amp in shipping and have yet to pay the claim (over 2 months), but the tubes were shipped separately and were unscathed. The closest tube in performance that is in current production is the 300BXLS. This tube makes the XLS seem like a lightweight.
These tubes can be used in any 300B circuit, but in order to get the full potential should be biased for this tube. 300B amp owners may like this tube in their rig without biasing, no way I can know. Rated for over 500 plate volts, the maximum output of this variant is 22 watts. Construction quality is exceptional. If you are currently using a 300BXLS then your current bias settings (if biased for the XLS) will bring your close to unlocking this tube's potential.
This tube type is much more linear and accurate than a normal 300B with much lower levels of distortion. The use of this tube overcomes many of the shortcomings of the normal 300B. All I can say is that you owe it to yourself if you think your amp's sound can be improved. This tube is the 300B equivalent to the 52B (improved version of the 50).
Asking price includes insured shipping in the U.S. and Paypal fee.
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Item can be returned within 7 days of receipt.
Items must be returned in their original condition, with all included packing materials and no signs of use. Buyer assumes responsibility for all shipping return costs unless the item was not received as described.
Buyer will receive a full refund in the original payment method less any shipping charges.
Sorry but I had a buyer return because he didnt like the sound of some tubes. He choose the tubes, they worked perfectly but he decided to game the system. In this case NOS items will be used upon return.