You may want to go to Arthur Salvatore's website where there is some commentary on these two amps. According to info on the site, a listener of both felt the JL-2 was superior. I think Ken Stevens thinks so too.
I never did compare the two but I purchased another 125lb monoblock instead. After purchasing the atma-sphere I haven't looked back....YET. Well maybe a few times.
My JL-2 arrived last week and is fantastic, but I never heard the JL-1. I understand the JL-2 has a teflon circuit board which makes a sound difference over the JL-1. I don't understand why.
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