450 Pound Monobloc Amplifier

Hi Mitch4T, all current Rowland amps and pres are based on switch mode power supplies (SMPSs). However this does not mean that the amps are necessarily running in class D. For example, look at the specs for M625 stereo and M725 monos...

http://jeffrowlandgroup.com/kb/categories.php?categoryid=203

and

http://jeffrowlandgroup.com/kb/categories.php?categoryid=208

G.

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Guido....class D or not...the switching power supply is what makes the amps able to be much smaller. That is the real point here...the ability to get good power in a smaller package.

I see that the Rowland has substantial sized heat sinks relative to the overall chassis size. Why would an amp with a switching power supply need heat sinks like that? I thought one of the main advantages of switching power supplies was a great reduction of amplifier heat.
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People believe that the main reason for switching power supplies is efficiency and size while they produce noise (tradeoff). In reality switching power supplies executed properly allow to reduce noise. For that reason Rowlands Capri preamp is powered by switching power supply (where efficiency is not important)

Yes, switching power supply is the same as class D. In fact class D was invented when engineers who designed highly responsive switching power supply showed responsiveness by making power supply to play music.

It's like buying a Mack truck to drive two blocks to the market. Silly, but sort of interesting.

@ minorl,Thanks about the compliment to Dan D Agistino momentum amps,I want them or the stereo version,wow!,you and mapman had a very interesting conversation here!awsome!,the both of you seem to know alot about amps!and yes my class A krell 700cx that is more power than 700 watts a channel with my 6oms speakers that dip to 4 oms alot,does not even fase the amp at all!LOL!A extra house heater forreal!LOL!,The heat that the amp generates does not bother me,since I live in the south,I am use to the heat here in alabama!cheers!