More on Valve Matching
Here is more on valve matching.  Most valve manufacturers will match output valves in pairs and quads with varying degrees of accuracy.  I have written about this previously here. Also you might about to read our thoughts on why do matching in the first place  and  click here for the article! Valve manufacturers in general do not provide  matching of pre-amp valves like the ECC81, ECC82, ECC83 ( 12AT7, 12AU7, 12AX7). You might be asking how […]