Hi gays, im looking at a Warwick Pro Fet and a couple of things got my atention. First is: the manual states that when getting started You should maKe sure that loudspeakers capables of sustaining The load of a bass signal are connected To the speaker out socket. Does that mean i cannot use it with a headphone and no cabinet? Second: when using headphones, it requires a 200 ohms minimum. Are there any affordable ones?