hey everyone, i am very much a novice when it comes to anything electrical but i have managed to set my record player up with ny amp and speakers. The only issue i have is when i have the record player on it only plays out of the left speaker, the record player is plugged into the phono port. i know its not the amp or the speakers as the amp has just had a new mother board put in, the speakers are brand new, Plus all works fine when i have my phone plugged in to the aux port. So i am the problem lies with the record player, i have done a bit of research myself and i think i may need a new cartridge. if anyone can help or possibly point me in the right direction to where i may find a cartride, (the record player is a Dual 604). Any help and tips would be appreciated.