Tape Head Gain
Tape head gain is the voltage amplification from a tape preamplifier's head input to its line output, expressed in decibels.
Gain raises the head signal to a usable line level. Because tape equalization varies with frequency, the quoted gain needs its stated reference frequency. More gain is not automatically better: noise and overload margin also matter.
Tape Head Gain — Tape Preamp
A suitable gain setting allows the head signal to reach the level required by the next component. Too little can leave insufficient output; too much can reduce headroom in the preamplifier or overload a following input. Fixed, adjustable and switchable arrangements provide different flexibility.
Compare gains at the same reference frequency, commonly 1 kHz, and with the relevant playback EQ. Check the head's signal level and the following input's limits. An output-level trim is not necessarily a change in head-stage gain, and a phono input's gain on a combined unit does not describe the tape input.