I just bought a Jaco demo from the Rky Mtn Audio Fest and I couldn't be happier, well maybe if was free. Now I need to save up for a Haley for my video cabinet.
That's an interesting observation regarding the power amps. I've actually had the opposite result. There was an immediate and very noticable all-around improvement when I bought a Duke for my JC-1s - and I live in an area where power is relatively clean to begin with. I wouldn't voluntarily do without it now.
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