i have afriend who had infini caps put in his ls5111.audio research didn't do the upgrade,but put together the parts to do the job. they might upgrade it for you. i haven't heard it but,several friends told me the differnce was amazing. richard grey [the richard grey power company] did the upgrade for him.
ARC LS5mkIII: Is it old sound!
I have enjoyed my LS5III for the last three years, longer than I have kept any one piece of equipment. With the advancement of technology from ARC, more specifically the LS25 and LS16, will I be getting a better sounding preamp. More specifically, is the LS5III worth hanging onto or is its time up. Thank you in advance.