The 790 (at least the one we saw in New York last year, and I presume this hasn't changed) had two separate power connections - the only way to get 2100W of output is to have more than 2100W of input, and a single 15A circuit only offers 1800W. You should be able to connect a 790 to a single circuit, but you won't be able to max out all seven channels at once without two dedicated 15A circuits.

gonk: needing two seperate circuits is sort of a "sporty" proposition for most of us. You would either have to wire an additional circuit to your listening room or run one of the plugs to a different circuit in another room. Neither of these options appeal very much to me.

Of course, with audio, you are looking at peaks not continuous duty. I went and looked at the manual for the 770 to see if I could tell what the fuze in the input line was. I did not see it specified. How big is the fuze in the 750 that you have?

Like I said, you don't have to have it - the 790 would still work if fed from a single 15A circuit, it just wouldn't be able to produce the full 300W from all seven channels at once (which would be an improbably demand anyway). And no matter whose amps you buy, if you want to have seven channels with 300W each and the ability to push them all tho that level, you've going to need those two separate circuits anyway since a single 15A circuit can't provide that much power.

I've never messed with my 750's fuse, so I don't know what size it is.

gonk: my house wiring for the plugs are all 20 amp circuits, so I have a little more "juice" for the equipment.

I strongly suspect that it would be very difficult to drive all seven channels to 300 watts for more than a couple of seconds, with HT. If I am correct, the capacitor banks should be more than adequate to handle the surge.

Is the fuze on you amp internal or external where you could look at it? On the pictures, I did not see an external one. I am really interested in what Outlaw uses for there fuze size.

What say the rest of the tribe. Anyone know what size fuze is in the 775 or 770.

All of your receptacles are 20A circuits? That's unusual - 15A is the standard in most homes, at least in my area. It would certainly be handy, though.

I agree that it is difficult if not impossible to conceive of a scenario where you could drive all seven channels of a home theater to 300W simultaneously, but an amp manufacturer still needs to provide at least the physical capability of generating the rated output. I suspect that very few 790's will ever get two dedicated circuits.

I believe that the fuse in my 750 is internal, and my equipment rack is not conducive to getting to the rear panel without an hour or two of wire wrestling. You might give Outlaw a call or try their support site to find out about the fuses - I bet they could give you all the info you want pretty readily.

Hope those 20amp circuits are running 12/2 wire or better..

trikos: all the 20 amp circuits have 12/3, 2 conductor plus ground. The overhead lights are on seperate 15 amp circuits, 14/3, 2 conductor plus ground. Its all to "code."

gonk: here is what Outlaw said about the fuze.

"The Models 770 and 755 amplifiers do not use a fuse at the AC inlet. Instead, they use a dedicated 15 amp circuit breaker which doubles as a master power switch."

Interesting! I like that design.

ratpack

Good man! Just didn't want anyone burning up a perfectly good 790..

parts express has good price on good power wire .. i have 2 dedicated 20 a breaker i came off from panel and ran the wiring direct to my 2 monster hts 2500 's no plugs i put a junction box in and spliced and soldered all connects.. your system is only as strong as your weakest link,,,