Matching tube preamp to ss amp

rule of thumb is 10x - so you shd be fine

u can do better than a nad though...

@oldgzzrr

oldgzzrr Prima Luna Evo 100 with an output of 2800 ohms

Looking at this, https://ibb.co/MndcmrB the Prima Luna Evo 100 uses 0.47uF output coupling caps. With the Nad’s 25k input this equates to -3db at 14hz, -1.5db at 28hz and - 0.75db at 56 hz. So that output impedance of 2800ohm of the PL, gets even higher than 2800ohm as the frequency goes below 100hz

The output coupling cap really should be a min 1uF preferably 2uF

And if it were used with amps with 10kohm input impedance, which are becoming more common now, especially with Class-D, the those bass roll off figures double to -3db at 28hz, -1.5db at 56hz and -.75db at 112hz.

If you can solder, it looks an easy 1/2hr job to do from the top as it’s plate through pcb. Just heat pull out old and cut to length and solder the bigger ones in place. Something like these.
https://www.partsconnexion.com/MUNDORF-70328.html
https://www.partsconnexion.com/SOLEN-51541_ss43777.html
https://www.partsconnexion.com/SOLEN-51541_ss43745.html
https://www.partsconnexion.com/product49152.html


Cheers George

According to my research, yes 25 KOhm, the Nad would be used until funds available for a better amp.

Thanks George, Unfortunately that would be something beyond my abilities. Are you saying as is, these two would not be a good match? the Nad would be used until funds were available for a better amp.
Jeff