I can't help you with your specific question but I have owned the c-j 17ls2. It's a very good preamp with a nice rich sound. It is not as detailed as good newer preamps. This was c-j's first step away from the golden sound they were known for and it is definitely a change from the past but each generation of c-j preamps since then have moved a little further in that direction.
It does have a fairly high output impedance so your amp will have to have a 47k or higher input impedance.
Hope this helps.
It does have a fairly high output impedance so your amp will have to have a 47k or higher input impedance.
Hope this helps.