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Electro-Harmonix's 300B EH - Platinum Matched (Single)
Tubes by Electro-Harmonix
Manufacturer's Description:Electro-Harmonix 300B's are available in platinum matched sets. Our platinum matching process consists of a 24 hour tube burn-in period followed by a bias (plate) current measurement in milliamps. Please specify matched tube grouping (ie. pair, quad,) when ordering (no odd-quantity groups, please).