pre-amp unacceptable noise level?


How much is an unacceptable level of noise/humming etc. from a pre-amp? I just bought a new tube pre-amp and when I replaced my old solid state one with it the noise level from the speakers practically tripled. There is an audible humming from the listening chair 10ft. away. I can't say I'm particularly happy with this considering the one I replaced did not do this.
fruff1976
The noise is the same level whether the volume is up or down. It's independent of the volume level. The problem is during softer passages or listening at lower volumes the noises/buzz/humm/hiss whatever it is can be heard over the music. It can be heard even when the cdp is turned off and no music is playing.
The dealer was very cooperative along with Rogue and a new one is being sent. Rogue customer service along with the dealer has been outstanding so far.