Pairing older NAD power amp with newer preamp

A minor point, Sandspur, but the ASL preamp also has a power indicator LED. It is located just above the logo.

Also, something to consider is that I believe 6N16B's have leads which are probably soldered to the circuit board in the SA-31 and other audio components which utilize them, rather than being socketed. Although IIRC that tube is rated for a very long lifespan, so replacement would presumably be required rarely if ever.

Good luck, however you decide to proceed. Regards,
-- Al

You might also consider selling the 214 and L40 and with the $500 in addition you are looking to spend, find a quite nice integrated...

Almarg, you caught me on the LED :). I started to look it up but decided to go ahead and post. Also, your technical knowledge and advice is much appreciated. I'm not familiar with IIRC but with a few key strokes I can learn a lot. I take it that the 12AU7 is something different?

J135, I have certainly considered what you suggested. The 214 is still a nice little amp. I tried to murder it one night during a partying frenzy. Fortunately, I found a good doctor who brought it back to life. We have had a good relationship since...just can't quite give up on her! As for the L40, it will be a great back-up and good for a bedroom.

I understand all too well !!! A few years ago I bought a passive, home made JC-Two preamp on Audiogon that has sounded quite good used as a back up, and was well below your budget. Not sure if they are still available.

Sandspur, I believe that the 6N16B was developed for some specific military applications, which is one reason it is rated to have a very long lifespan, as I mentioned. It is unusual in that it connects via wires which emerge from its bottom, rather than solid pins. I am aware of just a few audio components that use it, although all of them seem to be generally well regarded at their price points.

The 12AU7, which as with most tubes that are used in audio applications is installed by being plugged into a socket, is widely used in audio components at pretty much all price points, even in some cases in components costing well into five figures. And as I mentioned earlier, the sound of a component which uses it can be altered and tailored significantly by substituting tubes of different makes and vintages. Here are some examples most of which are currently manufactured, and here are some mostly vintage examples.

Also, in case it wasn't clear, "IIRC" = "if I recall correctly." I usually try to minimize use of Internet shorthand, but I don't always succeed :-)

Regards,
-- Al