I know that weight has weight(gulo no?) when it comes to output because of the transformer but there are exceptions to this rule. I have tested this hooked to a mobile speaker ( a huge motherf*r) and it had no problems driving it. If you go to the Sakura thread all haters even admitted to expect the power from this model and their only problem with the model is (aside from its cheap) it does not output equally to all channels but Sakura was honest with their specs so why blame them. Unlike branded Avr's na equal daw pero di naman, cmon this issue has already been discussed all over the net and the consensus was that if you want power go for the separates, if you want convenience go to dedicated.
In general, the weight of an amplifier has a direct bearing on its ability to deliver the power it promises. There are exceptions, notably from Carver, but quite few. I have been lifting amps over the last 30 years and I have to say, lifting a true 250watt RMS stereo power amp is no laughing matter. What more for a 5 channel power amp. Just to give you an idea, the older Aragon 8008X5 5-channel 200watt RMS/ch power amp requires roller casters to push it in place in a rackshelf. It weighs in excess of 100 lbs.
There are certain laws of physics that are inescapable. Like if you want to give out more power, you just gotta have bigger trannies to output the needed current. As well as larger heavier filter caps and heavier chasis to support them.
But there's another way to find out. Just bear in mind that almost all commercial amps are class AB types which have an efficiency of about 40% to 50%. That means, they can only convert half or less of the electrical power input to usefull electric signal to drive the speakers they expect. The rest are dissipated as heat. So for a stereo amp, for example, to deliver on its promise of 250w RMS continuous per channel without headroom, that means its maximum electrical power should be rated at least 1000 watts or 1.0 kva or more. Check if the Sakura amp has power consumption rating in this magnitude. Many commercial 5.1 amps and receivers advertised as having at 100watts RMS per channel only have a revealing power consumption of 500 watts or less. ALso, make sure the power rating is given in RMS or average continuous with all channels driven or with both chanels driven in the case of stereo, at full bandwidth (20hz to 20khz) at a specified THD level into an 8-ohm load.
By the way, the Aragon example above, if I recall right, has a power consumption rating of 2.5KVA. It advises the buyer to have a dedicated power outlet with dedicated fuse box just for the amp.
The problem with me is that I can't afford a newer branded AVR na tingin ko mabibitin lang rin ako in the end and the fact that my viewing room is not that big but it aint small neither. peace.
I really couldn't care less about the promised power rating of the Sakura. But I see no problem with the configuration you plan to use. Complicated, true, but it will work and can give you the pleasures of listening in HT on gears costing 10 times more, provided your player does a good job of a preamp and decoder.
