In the last 2-3 years, I've had different amplifiers and integrated amplifiers in my system : Moon i5.3, Musical Fidelity M6i, Hegel H160, Devialet 120, Exposure 3010S2, HK 990, Cambridge Audio 851W, Adcom GFA 555SE, Class D Audio SDS 470C, Sony TA A1ES. I never did any DBT to compare these amps...