福三: a male given name

増幅器: an amplifier

big / broad, immense

to use / to employ / to make use of, to apply / to spend

(music) Abbreviation of ギター (gitā, “guitar (of a rock band)”).

(electronics) amplifier

(electronics) amplification

(electronics) amplify

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend