Telescope, 4K Ohms for balanced input may limit your choice of pres to devices with very low output impedance. The balanced pre I use has very low balanced output impedance of 80Ohms, remote control, incredibly smooth, but also very detailed and open, very fast with loads of authority, and built like a little tank. . . but it does not use tubes. It is the solid state jeff Rowland Capri. Seems to sell around the $2K mark on Audiogon., or about $2600 new. Needless to say, I do like it a lot. Guido
