Have I used those tubes? Yes.shasen wrote:Question have these nay-sayers actually spent the $$ required to get a super Rare NOS Mullard 5AR4/GZ34 to actually hear the difference for themselves? Didn't think so
There are three possibilities here: 1. They were using a different rectifier and switching to the GZ34, which puts out a higher voltage with less sag, produced a different sound. 2. They were using a worn out or off-spec GZ34 and replacement with a new one changed the voltage and sag enough to be noticeable. 3. They spent the money and of course they subconsciously want to hear the improvementMany of those customers have gone out of their way to write me to say that installing the Mullard has increased the "tightness and tone" in their amps. They mention that each note is much more clear.
.There is zero science to back up claims that different brands of GZ34 affect the tone unless they are off-spec or worn out. This isn't like a 12AX7 where you can have different size plates, geometry, etc., which can affect the response at different frequencies for the audio signal which is passing through them (but does not pass through a rectifier).