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Tube Amp Noise with Klipsch Cornwall II

I just bought a pair of Klipsch Cornwall IIs for my Rogue Cronus integrate amp to replace a pair Spendor S3/5 SEs. Wow - bigger speakers are amazing. BUT now there is hiss coming through both speakers which can be heard 10 feet away - at all settings, even with volume all the way down.
The tube set is:
4 KT77s - which Rogue had made
3 - Electro Harmonix 12AU7s
2 Sovtek 12AX7LPS

Can anyone suggest how to lower my amp noise floor so I can enjoy these speakers?
waukeag

Showing 1 response by facten

facten
2,892 posts
 
Not an enlightened suggestion on my part but it might be worthwhile to call Mark at Rogue and see if he has speciifc NOS tube suggestions, or other ideas.

Prefacing this that I have a Cronus Magnum but it is driving 89db Tylers - Rogue had installed NOS Sylvania 12ax7 and au7s when they sent me the amp; and I currently have Siemens and Tungsols via Upscale in it now - like it with either "version"
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