have said this in numerous posts (see my informal review/evaluation from a year plus ago here when i bought them)
alberto’s agd amps are the real deal... absolutely tippity top tier sound, and superior to all other class d and gan based amps i have tried or heard to date, coupled with small light form factor and negligible heat output, a perfect ’summer amp’ for those living in 4 seasons climates ...(though i would qualify all this by saying that i essentially stopped auditioning these types of amps after getting the audions -- haven't heard ralph/atmasphere's amps, nor molas)