I strongly recommend a used SMSL DA-9 integrated amplifier and SMSL D300 DAC combo if you can find one, as both are discontinued—it pairs exceptionally well with the Wharfedale Diamond 12.2. I have also used several other amps and DACs, including the Audiolab 6000A, Quad Vena, Marantz PM6007, and various Class D amps from SMSL and Topping with the Diamond 12.2. However, none of them come close to matching the synergy of the said SMSLs + Diamond combination.