EAT 300b Triode Vacuum Tube (per pair)

In Stock

The Ultimate 300B tube from EAT.

New improved version. Sold as pair.

"With EAT 300B tubes in the circuit, the amplifier's performance at the frequency extremes improved pretty drastically."

AV Guide

Built with high-temperature glass, huge carbonized black plates and gold-plated pins, these individually serial numbered, hand-made 300B are the best currently available 300B on the market.

Warranty Information

EAT will replace the tubes providing the following conditions for all customers:

  1. The tubes have a warranty of 12 months or 2000 hours of use starting with the date of purchase. The purchase data must be written and stamped by the distributor/dealer within 21 days after purchase (registration).
  2. In the event of failure of the tubes, EAT or distributors/dealers will do replacement
    within valid warranty claims. The tubes must be returned with the original box and warranty certificate ( date of purchase stamp-registration and complete return form) and prepaid shipment, otherwise warranty will be void.
  3. Warranty has not been voided due to improper handling

Warranty Certificate Download

Proper Handling

Make sure that the electrical specifications of your amplifier are correct before using tubes in your circuit. Failure to follow the manufacturer's recommendations may result in damage to your amplifier or valves and automatically voids the warranty. Tubes should be used in accordance to the standard specs (see technical data sheet ) and not exceed the maximum levels.

EuroAudioTeam will not be liable for damage resulting from improper use of tubes in your amplifier. Abuse, accidental damage, or incorrect use of the tube will be determined by EAT. Only expert technicians can change the working points of the tube. Improper use of the tube or incorrect application of the tube to a circuit cannot be covered by our warranty.

Shipment and Packaging

Pack for shipping in the original box to prevent side shock. Insufficient packaging may cause broken pieces inside of the valve. Shipment costs will be covered by the buyer. Returned tubes must include warranty certificate ( registration), return form, and original package.

Burn-in Procedure

Valves need to be burned-in for 50-100 hours under the conditions described in the specifications. A correct burn-in will assure maximum lifetime and quality of sound. During burn-in, start with a low audio level and gradually increase the volume. Do not use stand-by mode during burn-in, and let the tubes cool down after each use. Burn in with noise tools, a burn-in cd, radio noise, or pink noise. Make sure the valves have enough air for proper circulation.

Do not overdrive or tap on a working tube. This will cause permanent filament damage.

Press and Reviews

AVguide Monthly

The EuroAudioTeam KT-88 and 300B Tubes All Bottled Up