What can i do to make my tube preamp sound warmer?

Hello,
I have gone through many interconnects and have learned that a good balance of silver and non-silver is the way to go. SilverAudio makes a great line of cables but I found my system fully loaded with these was indeed too forward and analytical ... particularly on the top. A couple of Cardas Golden Cross to/from the line stage helped a lot. Too much of the CGC and the system lost detail and too much of a good thing in the mids. It truly paid off to try diff cables at each link in the system and weigh the pros/cons of each to get a well balanced result.
But I would suspect that auditioning other speakers might be a more viable solution than fussing with cable at the moment.
John

The line stage preamp has some type of coupling caps.
AudioNote oil in paper caps will warm things up.

Dear All,

Thank your very much for your honest and satisfying answers.. Infact most of your suggestions proved a valid point, that i had suspected in the first place with the 300 Watt Cerwin Wega's Spkr and the silver interconnects..
Both are too bright to be on the same side ... I will start with replacing the interconnects first and then the cerwins.