Nagra electronics with Proac D40r

Hello all! 

First time poster, but long long LONG time follower at the forums... Thank you all for the breadth of your knowledge! 

Recently I have come across the opportunity to buy a demo Nagra Pl-l preamp paired with the vpa monoblocks.  

I'm worried about the ability to drive my d40R's (nominal impedance 4 ohms), especially in terms of the bass. 

Room is about 14'x18' . And to some extent I would have to get them sight unseen. Seller commits to take them back if there is some defect, but no synergy between components is not really a defect, hence my asking here... 

What are people's opinions on the Nagra's ability to drive the proacs?


Thanks in advance for your response! 

fauzigarib