Primaluna EVO 400 Amps/Preamp lacking bass impact

…lacking bass impact…

just to be clear, is the OP looking for more bass energy or a tighter bass definition?

I found the original EL34's in the HP Mono  Blocks I use were missing too much. I  am driving ATC SCM19s that have a flat impedance curve with very little damping problems. I skipped the lesser tubes when I decided to roll and went directly to KT150s. What a difference! They've been in there going on six years and still sound fine.

After I finally got the speakers positioned properly the bass is crisp and fully present. Full disclosure: I added two REL T/7i subs to pick up the very low end that the SCM-19s don't extend to.

Rock, Jazz, Big Band, Blues, Reggae, Zydeco, Female and Male Vocals are all tonally balanced. I've heard a lot of live music and this setup does an excellent reproduction. Plenty of bass.

all tube amplifiers will have a low damping factorel34s don't have the current delivery of a kt88 or 6550

adding a sub is not the answer a good sub adds pressure to the leading and trailing notes of the mains 

you have a few options tube roll or add a solid state amplifier

we are a focal dealer if that helps

Dave and Troy

audio intellect nj

Focal dealer

or upgrade to a tune amplifier with balls or a hybrid

If the subs are set correctly they don't get in the way of the mains.

It's all in the setup.

I have never been disappointed in my smaller EVO 100 integrated for sustained bass like organ,Tuba, or the punch of a large drum.

What I have noticed is a significant increase in lower bass notes, and attack with JJKT77 outputs. I do not need a sub with my speakers in the current room.