Why does my Plexi sound thin compared to my other modules?

[jgk62]

I have an RM100 with 6L6 tubes. I'm running the Recto, Plexi and Blackface modules.
When I go to the Plexi from any of the other modules, it just sounds 'thin'.
The other 2 modules are very full sounding, nice thick bass. And I only have the bass at 1 on the other 2 modules.

I guess my question is, is the Plexi supposed to sound like that? As far as I can tell, it's stock.

I'm going to put some EL34L tubes in there and see if that helps...

 

[Dallas Marlow]

Probably because both the recto and the black face are more voiced towards 6L6 tubes where as a Plexi is EL34's and gets much more of it's tone from the mids.