Marshall Amp Forum - View Single Post - JMP 2150 pre-amp valves (tubes)

Adwex · 05-15-2008, 01:38 PM

A 12AT7 is almost the same as a 12AX7, but it has lower gain. They are often used as the phase inverter, and sometimes (rarely, I think) they are used in the V1 position to soften the gain (later breakup).

05-15-2008, 01:38 PM	#5 (permalink)
Adwex Senior Member Join Date: Sep 2006 Location: Long Island, NY Posts: 720	Re: JMP 2150 pre-amp valves (tubes) A 12AT7 is almost the same as a 12AX7, but it has lower gain. They are often used as the phase inverter, and sometimes (rarely, I think) they are used in the V1 position to soften the gain (later breakup). __________________ www.myspace.com/rockerlivemusic