i have listened to most of the accuphase integrateds. the amp sections are very close sonically to their seperate counterparts. the pre sections are also of the high quality expected from this manufacturer. ( FWIW, after listeneing to numerous amps on avalon eidolons over the past 2+ years, i have concluded that a pair of accuphase a-50's are the best power sources available for these speakers. i already own an accuphase pre/dac and cd transport.) i'm also familiar with the jrdg concentras, tho not the ml integrated (never been a big fan of madrigal gear, generally). the accuphase e-306v, e-307 and e-407 easily outperform the concentras in virtually every area. the accuphases are faster, punchier and ultimately more musical. i cannot recommend them too highly.
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