Dear Kanwar
Thank you for your patience and endurance in answering all our questions. I understand most of the data in empirical terms, but using it in the real world has often eluded me. For example the use of the voltage data seems useful to determine potential clipping but I not quite sure how .......
Max output voltage is 48VRMS @ 4ohms or 134 V Peak to Peak and 41VRMS @ 2ohms or 116 V Peak to Peak
Its simple, when the peak voltage limit is reached, it cannot exceed power supply rail voltage level which is the ceiling for the clipping.
Imagine yourself floating inside a room and your body is suspended just midway between height of the room, now your clipping level would be when your head touches the ceiling or your feet touch the floor.
I was also not sure what the benefit (or dangers) of designing without capacitors in the audio path (direct DC coupling) of an audio amplifier may have. Sorry if that is quite a basic EE question.
Designing without capacitors ensure zero phaseshift [capacitors cause 90deg phase shift under certain conditions] along with more transparency and you don't have to listen to the artifacts introduced by capacitors. Electrolytic capacitors are worst in this regard, best are film capacitors. Another reason is aging process which degrades the capacitors over time. DC coupling is harmful for speakers if the amplifier is not protected by DC fault protection, other wise dc offset from poor source transfers to dc coupled amp and might fry the speakers by passing dc component at output.
By the way, I have occasionally used these notes (see link below) to understand some of the issues to do with amplifier output ratings. Do you think it is accurate in most part and perhaps it would be useful for some FM readers:
Undertanding Power Amplifier Power Ratings
Nice article
