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Mcintosh C2600 preamp tube upgrade

I recently added the new McIntosh C2600 tube preamp to my system. It's paired up with the MC452 power amp along with Sonus Faber Elipsa speakers and Transparent interconnects/speaker cable.
I"m looking for some guidance with regard to upgrading the tubes in the C2600. Should I, or shouldn't I ? 
Also, what brand should I look for and where should I buy them. And finally, is this a diy upgrade or should I have it done at a audio shop? 
I appreciate any guidance all you audiophiles can offer
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Showing 1 response by vcincotta

vcincotta
1 posts
 
The input about the tubes is great, thank you everyone.  A couple of further questions about the 2600.  Does anyone know if the tubes are utilized when going through coaxial or optical inputs vs the balanced or unbalanced inputs?  I clearly hear a difference between the various inputs.  Also, are you enacting the tone control on your inputs.  Again, I hear a difference.  My components are the C2600, MC302, Martin Logan Summit X speakers and a Marantz SACD player.  Any thoughts / guidance is greatly appreciated.  
Thank you!
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