That seems a bit too long. Typically 5 feet is considered max, especially if you are using an MC but you are ok with Ortofon Blue since it is an MM cartridge.
The MOST important factor in a phono cable is the shielding and the extra capacitance. When it is too long, the extra capacitance may cause it to increase the high frequency response (treble) to a point where it may be noticeable.
Voltage loss is not going to be too much of an issue since there is virtually no current flowing in the wire, since the input impedance of an MM phono amp is about 47k and a few extra ohms from the cable will not make that much of a difference.
However, try it and if it sounds ok, you are done, if not, try and keep it shorter.
The MOST important factor in a phono cable is the shielding and the extra capacitance. When it is too long, the extra capacitance may cause it to increase the high frequency response (treble) to a point where it may be noticeable.
Voltage loss is not going to be too much of an issue since there is virtually no current flowing in the wire, since the input impedance of an MM phono amp is about 47k and a few extra ohms from the cable will not make that much of a difference.
However, try it and if it sounds ok, you are done, if not, try and keep it shorter.