No preamp 'Balance' control?

I would never consider a linestage/preamp without a balance control, preferably operated by remote control. Once you have used a remotely controlled balance that allows for minute balance changes, you will appreciate what that does to locking in the sound. It is particularly important with a phono setup because cartridge channel balance can be quite a bit off.

If it is done with a resistor ladder, and a logic circuit to set each channel separately, there is only one control per channel in the circuit (the same as a volume control without balance control).

I don't use the one in my secondary system and don't miss the balance control in my main system. I really don't know why such a device would be necessary if the system is properly setup. I suppose there may be installations where symmetry or other obsticles interfere with staging that one might wish for a balance control but that doesn't apply to me.

I do have a preamp, designed by Ben Duncan and built by Audio Synthesis, that has a remote and uses an optical system to change balance between the channels but I have never used this feature. I just this minute realized that the preamp I currently use, an Audio Synthesis Passion Ultimate passive, also has the same system [using only one resistor total in the preamp] and also has a balance adjustment. I had totally forgotten about it. So it is either totally unnecessary or absolutely essential, you pays your money and makes your choice.

Cary SLP Pre's have a master volume, and a right and a left balance potentiometer for great flexability, but I usually run the L and R wide open then adjust the master volume.

Late comment.  Many of us have a slight hearing loss in one ear.  Mine is about 2db.  Just can not imagine listening to my tube gear without the sound centered.  An off center image takes away from the experience big time.