"High current" is another way of saying low output impedance. Even with a relatively low 10K impedance input of the power amp, a 1 volt preamp output signal would require a current of only 0.0001 amp.
Low output impedance makes the preamp-to-poweramp wiring less sensitive to noise pickup. Solid state preamps have output impedance in the range of 10 to 50 ohms, whereas tube preamps typically run about 600 ohms (although some are lower).
The take-away point is that with a solid state preamp there is much less reason to invest in very expensive interconnects.
Low output impedance makes the preamp-to-poweramp wiring less sensitive to noise pickup. Solid state preamps have output impedance in the range of 10 to 50 ohms, whereas tube preamps typically run about 600 ohms (although some are lower).
The take-away point is that with a solid state preamp there is much less reason to invest in very expensive interconnects.