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These are fine sounding tubes and with the rating, you can replace the tubes in your amp with tubes that match your current pair rating of low, med or high WITHOUT re-biasing your amp! I have my DRRI biased pretty hot and it gets a richer, clean, warm sound because of it. When the tubes get tired I just order these and slap 'em in. I'm a good guitar player but I have no repair or maintenance skills so - anybody can do it..
Verified purchase: Yes | Condition: New
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