Cary V12 and other tubes

I just bought 2 Cary mono block V12i's and are hook up to new sophia 2's. Also a Cary slp98 preamp. Every tube is original stock. I hooked everything and to my ears was dissapointed in the sound. Lacks bass pretty bad, and sound just doesnt seem to open up as I were to hope for. Also I have to crank up the volume knob to about 3 o'clock just to get about 80db's. I have the tubes biased at 275. Am I doing something wrong? Your help is greatly needed.

Thanks Bmotorcycle....I bought these used but were supposedly not used. It does sound like BS about "breaking in" but there must be some truth because you hear that alot. Good tip about the bias also, I would have never known. I'll let the system break in for a while and let you know. I'm new to he hi-fi end so this is all new to me, expecially tubes.....David

I figured out what the problem was.....my meter was inaccurate in reading the bias. My faulty meter read 275 in reality it was reading 180. With the bias now set propery....it's a different stereo, WOW, plenty of bass, and gobs of power....