Im not sure if its the high effeciency, but Im not hearing distortion on my speakers, so if it is going into 4ohm mode I guess I may not notice.
I wonder how drastically 4ohm mode cuts power compared to 6ohm.
Igor, have you measured these amps and have some objective evidence that the amps are distorting? What form is the distortion taking?
As you know, I am of the firm belief that properly designed, modern Solid State amps (which includes all of the amps we are discussing in this thread), working within their design parameters and not driven into clipping, have been proven numerous times, in properly conducted blind ABX tests, to be sonically indistinguishable from one another. So I am very interested in your comments and evidence, as I know you approach these things with a scientific mind.
There isn’t really any need to do so - amps made by mainstream manufacturers such as Onkyo, Denon, Emo etc etc are all going to be 'properly designed'. Designing amps is very, very easy and all the problems were solved decades ago. I included those words because often someone who thinks he is smarter than he is will come back and say something like "what about a 10 dollar Chinese amp off eBay then?" or they will point to an amp that has been deliberately designed to have a distortion as part of the design (amp as tone control). Modern amps just amplify - they take the input and pass it to the output totally unchanged in any way other than in amplitude.
Its because Onkyo use good mechanical relays in their design instead of the often inferior electronic relays. Mechanical relays click.
I haven’t noticed it clicking unless it is changing sound formats I must say. My 5509 is in a separate closet these days, outside the HT, so I never hear any clicking anyway nowadays. BTW, I was not suggesting that Denon's electronic relays are inferior - just that this type of relay can be.
Thanks Igor. I don't really know what to reply. I believe that you are hearing what you are hearing but I am amazed that a mainstream AVR would have an unsatisfactory amp in it. I wonder if there was a batch that were faulty?
Interesting stuff - thanks. I’d love to know the results of you opening it up if you do still have it after the warranty expires.
I believe this preamp is great. The fact that Onkyo uses proper mechanical relays and the Xt32 is spectacular. I just wish I had a little more knowledge regarding the AV receiver deception and how these units are not 4 ohm rated. Marantz AV receiver regardless of cost rate their units at a minimum 6 ohm and do not lie for marketing reasons and sales. The expectation is put on the customer to know the difference between "continuous 6 Ohm" and " certified 4 ohm" performance. This is very deceptive. I was even mixed typing the quotes. I can say at this point though I like the unit in all but this issue I will never buy an Onkyo receiver again. Not because I don't believe it is a good product but because I absolutely and completely do not believe in supporting companies that are deceptive, which I believe this is a definite the case. When someone goes to say Best Buy or Future Shop and reads the specs for these systems they say clear as day 4 ohm rated and the simple fact is they are not. I'm sure there will be some As@#le out there that says something like why would you buy at such and such, well, that reason for eugenics has missed the point. The only bright side to this whole situation is after turning off these 8 Ohm mis-rated amplifiers and spending a whole pile of money on amps I now require. I have acquired a good preamp. As I'm sure many have seen the price of most decent preamps with XT32 I suppose this is an acceptable compromise. Ladies and Gentleman there is not a lot of point to having specs if the manufacturer lies to the distributor who passes the information on down the line. For that one reason and one reason alone Onkyo can suck it. Not for a bad product but for a product that it sold as something it is not. Good Day.