Hi all, this is my first post. Need some help about my Helix LT. So Last night i had a gig and i used Marshall Tube amp. The sound was nasty, terrible. So i learned from few forums that i need to use FRFR speaker to get a clean authentic Helix sound. So my Question is what is the best FRFR speaker? Does QSC K series consider as an FRFR speaker? I do gigs here and there and i drive coupe. So won't able to carry a big speaker.