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Upscale Certified Tubes

Electro-Harmonix 300B

Electro-Harmonix 300B

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Regular price $195.95 In stock now!
Regular price Sale price $195.95 In stock now!
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Cryogenic Treatment

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We are restricting sales of these tubes to customers who have purchased PrimaLuna amplifiers from Upscale Audio at this time. Sorry, no exceptions. Your email address will be matched to purchase at checkout.

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Electro-Harmonix 300B

This is the default bitchin' tube that will not give you problems, sounds wonderful, and priced right. This is the most commonly used OEM tube for manufacturers of 300B amps because of it's low price and rugged build. There are many versions out there, this is the best "gold grid" version. Factory matched.