Output Voltage

It shouldn't be, unless your phono amp doesn't have enough gain for the cart you are using.

What phono amp and cart do you have?

I'm using a Creek OBH-15, with a dynavector 10x5, the creeks has a line output voltage of 250mv, and on the cd players the output is around 2 volts. The cartridge is used on the mm side of the creek, and matches pretty well, i'm just wondering why the preamp doesn't put out as much signal, as my cd player.

I can't tell what 250mv means without knowing how that was measured.

I checked their web site. The MM output of the Creek OBH-15 has a gain of 37db, which is too low for the Dynavector’s 2.5mv output. I think you need about 10db more gain to match well.