When i visited Mr Shyam Bajaj at his office to buy my Norge 4242 amps he ran a bench test on special request for the 4242 which i was taking home and the IM distortion of the amp was around 0.07-0.04% when measured using the test instruments he had. Frequency response was ruler flat from 20Hz-20Khz and was around -1 db at 80 khz. It delivered 43 watts into a 8 ohms load per channel, 4 ohms was around 60-65 watts per channel if i remember right. It was in short as good as my onkyo A9211 stereo amp costing 4 times more.