If you play metal, the low end FRFR speakers are soul stealing ear piercing boxes of misery. So many of them have such exaggerated highs and lows so they seem impressive when playing Kenny G CDs at Guitar Center.
I would highly advise that you save a little more and go for the Atomic CLR or Matrix FR12. At a minimum spring for the extra $75-100 for QSC K10s.
Not sure about other powered speakers, but my Alto TS112A accepts a normal 1/4" guitar cable. It can also accept XLR.Thanks - you plug a standard guitar cable into the FRFR or does it need a speaker/cabinet cable? (I don't even know if they're any different to guitar cabled? Lol)