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Krell DUO 300 XD vs Krell Solo 575 XD

I am strongly considering this upgrade. I really don't need the extra power as I use a Martin Logan Balanced Force 212  sub which really bring impactful bass. What I am looking for is increased fidelity? Would appreciate any feedback. I love the  Krell XD amps!
bulldogger
bulldogger OP
262 posts
 
Not just more power. Same sound. Love the sound. I wouldn’t want to upgrade to play louder. 
You are sure upgrading would be noticeable ? Any experience with amps

fiesta75
1,378 posts
 
Question, what speakers are you using, ML model? Yes, I'm familiar with both Krells you mentioned. Very good amps, but only 40v/µs rise time. They don't have the "sparkle" of some other amps in their price range. I don't like the fans when they come on and you turn the volume down, audible.
bulldogger OP
262 posts
 
I use McIntosh XR200 speakers. The 300 Duo XD is extremely dynamic with my speakers. Deep tight bass. I don’t hear fans from my seating location. Absolutely love the Krell sound. I’m not interested in other amps, just upgrading within this line.
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