300B SET or EL34 SET

I'm thinking of Audion Sterling EL34 and Audion Silver Night (300B). I tought my Tannoy Legacy Eaton at 89dB sensivity would be too hard for the 300B amp to drive but Graeme at Audion says it will be no problem.

Both tubes (EL34 & 300B) have a pronounced midrange profile but IMO (based on the amps I sell from Art Audio) is that the EL34 has a pronounced mid emphasis and the high's are a bit rolled off compared to say, a KT88.  The 300B has a lush, almost addictive midrange with excellent high frequency extension.  

Bass response will never be as good as with a solid state amp but ultimate bass response will be driven by the quality of  the output transformers.  

89dB is low for a 300B.  Whether it is adequate very much depends on your room.  In a smallish room with speakers near the corners, yes.  In a larger room.  

IME, a true triode tube like the 300B will sound better that an EL34 tube  "wired" in triode.  Low level listening ability is more to do with proper speaker matching than tube type.

But if we just look at the characteristics of the tube itself; which tube has most punch in the bass, or best bass?
What I understand from your answers the hights also goes to 300B.

But if we just look at the characteristics of the tube itself; which tube has most punch in the bass, or best bass?
What I understand from your answers the hights also goes to 300B.

The EL34 will produce more power which could translate into more bass when driving a less efficient speaker.  A 300B amplifier takes more care in matching with the appropriate speaker.