https://guitarnoise.forum/live-sound/maybe-a-dumb-question-6l6gc-vs-5881wxt/ Guitar Noise Discussion Board en-US Thu, 04 Jun 2026 17:19:22 +0000 wpForo 60 https://guitarnoise.forum/live-sound/maybe-a-dumb-question-6l6gc-vs-5881wxt/#post-369192 Thu, 08 Sep 2011 16:29:29 +0000 Perhaps if the bias isn't tweaked (or at least checked) when changing tube brands there might be a shortening of tube life.

Regardless, take a look at this tube comparison test, done a few years ago.
The Electro Harmonix tube is on page 4.]]> Live Sound kent_eh https://guitarnoise.forum/live-sound/maybe-a-dumb-question-6l6gc-vs-5881wxt/#post-369192 https://guitarnoise.forum/live-sound/maybe-a-dumb-question-6l6gc-vs-5881wxt/#post-41789 Thu, 08 Sep 2011 02:53:46 +0000
I was gonna replace them with some Electro-harmonix 6L6GCs, but I've heard that replacing 5881s with certain types of 6L6s may damage the amp. Anyone know about this?

Also, if anyone's tried Electro-harmonix power tubes and can give me some info on them, that'd be great. I recently put some EH 12ax7s in an old amp and the improvement was INCREDIBLE. I'm wondering if their power tubes are as good.]]> Live Sound AndyM https://guitarnoise.forum/live-sound/maybe-a-dumb-question-6l6gc-vs-5881wxt/#post-41789