Boogie Preamp tube question

[nathan28]

Hey guys im getting ready to order some preamp tubes for my Roadking from boogie and was curious what the difference is between the
boogie 12ax7 and the spax7a tubes they sale?

 

[ANIMATED SUSPENSION]

The SPAX7 is tested for extra low noise and microphonics. Only really necessary in V1 position. Oh and it has a funny cap on it too !!

 

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