For a few hunded you could sell your preamp and buy an LS 16 like I just sold and save a couple of hundred bucks at the same time. The LS 16 also uses Infinicaps. Also your preamp wouldn't appreciate hardly at all with the upgrade so that would be a loss if you ever sell it.
Audio Research LS-15 Infincaps
I own ARC LS-15 pre-amp. Mine has REL caps. Later in production they equipped their LS-15 pre-amps with infinicaps. Has anyone compare the LS-15 with REL caps to the one with Infinicaps? If so, what are the advantages in sound of this pre-amp with infincaps vs the REL caps. I am thinking of sending my pre-amp to ARC for upgrade to infincaps. The price ARC charges is not a killer, but it's still few hundred bucks. Is it really worth it? Thanks in advance.