Originally Posted by afmdss306
Currently have a rx-v571, buy have an opportunity to get a rx-a700 really cheap. Should I buy it to replace my current receiver? I really like having the USB plug for my iPod, but the A700 seems to have more to offer overall. The one thing I don't get is that the A700 only has 5 watts more power. That doesn't seem like anything for how much better it is.
What does everyone think?
I don't think you should try to compare power output. It's explained many times here, but some quick points...
* The power spec is not absolute; for example, a mfg. could measure at a different THD and get a different power figure, or use 1khz vs 20hz-20khz
* A resonable position to take, is that it takes twice the power for a significant gain (but that's not the whole story due to the way multi-channel amps work, but it's a good idea anyway)
* The real world performance is unclear; depending on how the limiter circuits work, and what happens in loud scenes in movies when all the channels are drawing a high amount of current
What I do, is to look at cabinet size. If it's a larger cabinet, that often means a bigger transformer in the power supply. You can then look at weight. You can also download manuals and look at it's power draw in the specs. By looking at these things, and understanding how Yamaha goes about things (something I used to understand better, having studied service manuals and product lines,) I come to some basic conclusions about how I think one model compares to another. The one thing I look at least...is what Yamaha claims the power output to be