Without the tube, the voltages in the circuit will be higher in places and may exceed design limits, I would not do it myself. The device was carefully designed to have the tube and its heat. It was not designed for no tube.
ARC SP-14 tube question
I am currently using an ARC SP-14 preamp, but both turntables are going to line level inputs, the internal phono pre is never used. Can I safely remove the tube which creates a surprising amount of heat to hopefully prolong the life of nearby components inside the preamp or would no load in the circuit cause any problems? Thanks in advance.