Power consuption of an amplifier

@imhififan that would be great, I have sent email to company-owner of Micromega, la boite concept, and to three repair shops which may have experience with this model. Hope someone will answer. 

Ok, but what 1/8 Pmax under 8 Ohms : 185W means then?

artoly, yes, I think so too, some reserve should be

Thank you for your reply, Jerry! So, we have two opinions already 

How do you think, is it real if amplifier consumes 185W but delivers 300W? 

I'm a novice in physics

I'm using 4 Ohms Buchardt S400 MK2 speakers 

gs5556, thanks for your advice.

If I understand right, if power consumption will exceed max power of transformer, the transformer will just turn off because of built-in protection.

I don't know, if the socket is 1800W it doesn't mean that the amplifier will take whole 1800W, right?

I'm looking into this model now:

https://www.bronson-energy.com/shop/bronson-ti-1000-620

It's German, silent, made including for music equipment, toroidal and looks nice, has good reviews from music lovers.

Oh yeah, this would be ultimate solution!

But I'll try to double rating, because my wallet is already bleeding

Remains to be seen what amount to double. 185, 480 or just get a monster transformer for 1500-5000W.

Taking into account all points of view, for now I think the best way to take a 1000W transformer because it will cover fully option 1, will be enough for option 2, and maybe suit for option 3 (cause I don't think I can listen to this amp so loud that it will need 1500W).

Thanks for the explanation @jea48 !

@mswale Nothing is written on the back (just 120v), but I agree with you about listenenig volume

@jea48, Yeah, thats what we are talking about. If we have consumption power 480W and take a transformer that can handle 1000W, isn't it enough to have a double reserve for peak power consumption? And again, if it depends on listening volume, I'm not gonna terrorize my neighbors. No matter that I love death metal, I like to listen to it on comfortable level, like a middle between relaxing and having fun you know. 

What about LLC SMPS, it's advantages are possibility of low power consumption at light-load/standby and efficiency up to 98%, M150 has 95%, which must mean that the real power consumption is not far from it's power output. Again, quote from hifinews:

M150 is reinforced by a PFC (Power Factor Correction) version of its RPS power supply. Rated at 150W/8ohm, the M-150 delivers 2x167W/8ohm and 2x315W/4ohm with 175W, 335W, 565W and 690W available under dynamic conditions into 8, 4, 2 and 1ohm loads. 

My speakers have minimum 3ohm, not less if I understand right Erin's graph:

But I don't understand what is EDPR, it's something terrifying. 

Hello Mike @ditusa !

What does it mean? 

Hi @imhififan

I don't see any jumpers

@curiousjim I'm trying to find out now if it is inside. It is not possible to find a service manual on Internet. I asked a question to La Boite Concept customer service and on one french hi-fi forum. I don't want to open it myself, I'm afraid to break something. And I don't believe local services much, because they are working with vintage equipment mostly, not modern. But If I'll be sure it is possible, I'll go to service and ask to open it.