InfiniCaps or V cap upgrades for ARC LS7

I owned a LS7 when it first came out. I wouldn't spend the money for a couple reasons. Not that they demand a lot of money today, but modifying it will reduce its value. I never thought it was all that good of a preamp to begin with; it wasn't horrible but there were many preamps that were much better at the time and one being a solid state, the LS3 was a much better piece. I'd suggest unload it and look for something different altogether. 

Hate to keep bringing up this preamp but it's a tuff one to beat. A ModWright SWL 9.0 SE will walk all over your LS7 no matter what you do to it, and you'll be money ahead. I owned the SWL for awhile so I do know this preamp as well.

Sorry for the bad news. Good luck.

A LS7 no matter what you do to it is going to outshine a MW SWL 9.0SE. It's not just a cap upgrade it needs. I tried NOS tubes in mine and etc. it just wasn't a great design, was short lived and the LS8 wasn't much better... short lived too I recall. The LS2b was much better or look for a LS15 if you want to stay with ARC. I'm guessing no one else on this thread owns or owned one.

After I sold my LS3 I went to a Sonic Frontiers SFL 1 next which is a more musical unit. You can sell your LS7 and probably buy a much better preamp for not much more if any more. 

If if you are going to keep it and try the caps I'd suggest keeping the caps in it and just add small bypass caps on them. I used to own the schematic but gave it to the guy that bought mine, so I'm sure you can get your hands on one. Assuming you know what you're doing? If not I'd have a tech with mod experience do the work or you might have a mess then it's worthless. 

Meant after I sold my LS7, not LS3. The LS3 was a better preamp. My dad had one when I had my LS7 and we did compare them and there was no comparison.