The horns that Klipsch used are brutally efficient/bright, and any noise upstream(like the preamp section of the integrated) will be brought out without mercy. Replace the small signal tubes with "Platinum Graded" ones from Upscale Audio, ie: the choices here- (http://www.upscaleaudio.com/12AU7ECC82_c_44.html) and (http://www.upscaleaudio.com/b12AX7ECC835751b_c_40.html) If you click on the tubes, you will be presented with the various grades available. While you're at it; upgrade to some quality NOS tubes and you'll be rewarded with a much improved presentation.
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?
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?