On Sun, 1 Nov 2015 11:08:12 -0500, I wrote: (replying to myself): > Reference: > http://www.powerguru.org/class-d-audio-amplifier-matches-class-ab-with-higher-efficiency/ > Look at the graphs at the end of the article; at low power, A-B amps > are extremely inneficient; this is not a problem on systems with > constant power supplies (like at home or in a running car).
There's one other thing to consider when looking at the graphs. > > > At 13:48 31-10-15, umashankar manthravadi wrote: > > > >i should check the specs for the ic.it is a single chip and the > > > >board looks well made - it says 50 watts per channel, but i > > > >would be happy with about 18watts into 4 ohms per channel. (it > > > >should be capable of that much - these are bridge outputs. Choosing an amp than can provide just enough power to a loudspeaker can reduce the amount of power required for drive a whole system. So if 18W per channel is enough, then choosing a 50W amp (even if it is a class-D amp) is not an optimal choice. The fact that smaller amps can distort more is not a problem (except for paranoid audiophiles), and limiting the power sent to small loudspeakers is safer. -- Marc "Il y a moins de cerveaux lumineux que de crânes éblouis" (Albert Brie) _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
