Does such a preamp exist?

My pre simply has too much gain. I need a pre with 0 gain, but without the impedance problem of a passive;
So, this preamp has 0 gain input buffer, passive volume and sourse select network, then 0 gain output buffer...I wonder if this kind of pre exsists? If yes, please tell me, I want one badly...my volume knob keeps at 7-8 o'clock and already too loud.
Oh, one more thing, it must have balanced output...I know this is so difficult, I've searched everywhere and got no result.