James has an old Onkyo TXNR808 A/V receiver that he's looking to replace. What would Scott recommend, and can he add a secondary amp to boost the power to his main speakers? Scott says he can add an amp, but he won't really get more power. Most receivers have a pre-amp out which he can then use with a separate, dedicated amp. But it's important to know the impedance of the speakers. The lower impedance, the more power he'll need.