Audio Research LS-15 Infincaps

Agree...those sovtek 6922 tubes that come with the LS-15 are not worth the effort. I did replace them with nos Amperex EC88 it is much smoother now. what is ei 6dj8? what brand is that?

I've been a cap fan for years,sustituting this cap for that in previous ARC Preamps.In general terms Rel Caps put out a nice midband reproduction,and image fairly well.Infinicaps
has this high freq. extension in air,which lead to a much broader and wider soundstaging of the device utilized in.
I personally own a ARC VT-60 Lenord told me it could be upgraded with Infinicaps as well.I may go that route myself.I could install my own caps,But ARC does other things to my amp I'm not familiar with and of course they would guarantee their work.Lenord did advise me in my situation with infinicaps expect more bass inpact and better high freq. extension which did not surprise me for him to say that based on my previous experiences with caps.

Audiophile 1,I and a pal had/have Audio Research SP-15 pre-amps,with built in phono.Not long ago both of us sent our units to Great Northern Sound for a major upgrade.I had previously,happily,owned the Sp-10,and Sp-11,however I liked the idea of the Sp-15's 3 tube phono section,as this afforded me the chance to tube roll(huge advantage)without robbing a bank.

Great Northern Sound(a great modder,BTW,though there's nothing wrong with using Audio Research,obviously)gave me a few differing,voicing options,Infinicaps,MIT's etc.I chose the infinicaps for my phono stage,as this was apparently going to give a more open and less grainy sound to my unit.The power supply,as I remember, had "Elna caps and A few Black Gate caps",as well.Not shabby,though my friend opted to spend an additional 600 bucks and go full Black Gate,in the power supply.I don't hear the diff,and we have almost identical equipment.

To make a long story short,if you like your unit,as I liked mine,resist the never ending push to sell your stuff.Other options are available,as in the Audio Research update,you mention.

With regards to the Infinicap update,both I and my pal are THRILLED with the improvement,across the board.Detail,resolution,and superb frequency extremes.I always have a good laugh,now,when I see the latest industry "push" to move to the supposed super(pricewise)units.It is just NOT the "big deal" that these megabuck units claim to be,as compared to a thoughtful,thinking hobbyist,that you seem to be.

I have another friend with the CJ "ART" unit.Sounds absolutely great.When I take my reference material over to his home I do not feel like I'm giving away anything,and I know I'm not rationalizing.Listen to your own intuitive perspective,and you'll not go astray.Good luck!!

He wrote "...Ei 6dj8". Ei is the abbreviation that a European company named something like Electrical Industries uses. They're available all over, are quite inexpensive, and certainly are among the best-value NP tubes around. Here's one source http://store.tubedepot.com/ei-6dj8eg.html among many. I've happy with my results with Ei 12AX7s, 12AU7s, and Tube Depot.

On your original question, here's an informed opinion about capacitors--
http://www.altavistaaudio.com/caps.html
.

Thanks. This is what I am talking about!!! Great suggestions. As I said before, I really like my LS-15 and just looking to improve the way it sounds. Selling it and getting something better is certainly an option in the future, when I really get sick of the pre-amp, but for now, I had it since 1999, bought it new, and still not tired of it. As for the tubes, I saw tubedepot on the web before, just dodn't know how reliable those guys are. Is it safe to buy tubes from them? I may check out these EI tubes. Thanks all.