Axiom Home Page Forums General Discussion Technical Questions Wattage?-responce from NAD, now I'm really confused

I dunno.. I like the fact they're honest. Think about their system as protection as opposed to current cutting. You get an amp that doesn't do that, and then you've got a melted pile of slag when it thermally overloads. (worst case, of course)

You lost me (granted that’s not hard to do, it’s been a few years since my apprenticeship - that I didn’t finish). Current is the unknown value. We are only given wattage ratings. What’s the formula for converting watts at a known resistance to amperes?

The general formula for watts is
watts = volts * current

The general formula for current is
current = volts / resistance

if we know the watts and the resistance, we can solve these equations for current like so:

current = sqrt(watts/resistance)

Agree with HAOLEB, I have a NAD 352 integrated at 80wpc into the M60's. Believe me, sitting between 10-15 feet away. This amp delivers at ear splitting, but very pleasent loudness. How much becomes to much?? This is plenty for me and my listening pleasures........

dammit....I was wrong.
150 watts / 8 ohms = 4.33 Amps and 34.6 V
150 watts / 4 ohms = 6.12 Amps and 24.49 V

I found a cool link to on line audio and power calculators.

http://www.sengpielaudio.com/calculator-ohm.htm

For those copy/paste challenged

http://www.sengpielaudio.com/calculator-ohm.htm

Hey now! Mine looks just like yours, except no underline....and well, it doesn't work. What'd I do wrong?

you need to add before the address and after the address, a few sites do this automatically, Axiom's board doesn't.

I'm a racing fan and I wish I had a dollar for everytime I've done [irl] [/irl]

I've been looking at the NAD T773 as well. I would hope that the swapping of output sources or levels for load, power and heat sensitivity, would not be audible. I guess they must be balancing the workload, so the receiver contributes equally to either speaker type. Based on the heat output required and resistance it feels, it achieves similar balance.

I had the impression that you could always get a little more power into the 4 ohm speaker, from the same amplifier if the amp could handle it. I would hope this design doesn't limit the power into 4 ohm as much as it increases the power into 8 ohm.

From my research so far the Nad T773 is pretty much one of the best out there, without going to seperates. Simple to operate, with easy remote and programming functions, as compared to the Harman Kardon. The honest power ratings to all channels running, is only met by a couple of companies out there. Sure there is better out there, but you might have to spend a thousand or more to get it, as in the case of Rotel.

Good luck,
Troy

Mike, what NAD is saying is that their amp has a automatic circuit to accomplish what some others do with either a manual 4ohm switch or menu setting. In either case the rail voltage available is reduced, which in turn reduces both the maximum current(I=E/R)and therefore power(P=ExI, or P=I(squared)xR)available at four ohms. That's why their amp isn't rated for the higher wattage that is normally available at 4ohms if the full voltage is still supplied at that impedance.

Despite that, it's highly likely that the NAD would be more than adequate at 4ohms. I'll repeat my previous suggestion that if your 7200 is plenty for for the M80s, so would the similar channels of the 3480 be for stereo M80s.