I got a tiny practice combo (epiphone studio bass 10s) and it's distorting even at low volumes. I know it's a pos and most would prob say toss it, but can anyone recommend a 6.5" 8 ohm replacement speaker? I already contacted epiphone and they do not sell replacements. The little combo is open back. I know that's not the best design. I was thinking maybe a ceiling or car speaker perhaps? I'd appreciate any suggestions. Thanks.