What Sogood said, two volts.
Does your CD player have volume control? They can put out up to 5 volts at maximum, and most preamps will not like that. If so, turn the volume down until the distortion stops. Like PLato said, the manufacturer or distributor can tell you where the normal volume setting (dB) has to be set for the equivalent of two volts.
Does your CD player have volume control? They can put out up to 5 volts at maximum, and most preamps will not like that. If so, turn the volume down until the distortion stops. Like PLato said, the manufacturer or distributor can tell you where the normal volume setting (dB) has to be set for the equivalent of two volts.