AlanPrice14

So I got a new turntable and hooked it up to my Ampeg bass amp, which has two aux inputs. At first, when I plugged into the amp's 3.5mm aux, only the right side came through. After using a headphone adapter to plug into the larger aux, sound appeared to come out both channels. I listened to some (mono) 45s for a while with no problems. Then I put on an LP, and began noticing something was missing. Though sound was coming through both channels, it was only sound that would usually come from the right. As problems had occurred just aux-ing my phone into the amp in the past, I tried the amp's regular input. There was no change. Is there anyway to correct this without buying a whole new setup? I was hoping to keep the bass amp configuration as it eliminated the need to buy a new amp/speakers. I'm banking on the hope there is some adapter to buy, but I'm not so hopeful. If I do have to resort to buying new equipment, what amp and speakers would you guys recommend? I would be searching in the lower budget price range. Sincere thanks to anyone that helps