Denon Rolls Out 10 New A/V Receivers

[rnatalli]

If there's anything you know you can't trust it's the power consumption ratings. The AVR-590 had a spec'd power consumption of 4.3 amps, the AVR-591 states 360 watts. What I do know as that manufacturers are fickle about any type of rating. If they were consistent we could almost figure them out without benchtests (not really, but you know what I mean). One year they might be taking the "we've got the most robust receiver in the market for the money right now, I mean look at the power consumption" marketing scheme. Harman Kardon has done this for years. They throw around crazy high power consumption numbers for peak (split second before the thing blows to smithereens peak) while having extremely low wattage output per channel figures. The following year they take the "we're going to go green" marketing scheme. How could it be that the receiver has a lower power consumption rating and now can output 120 watts per channel? OMG IT CAN'T! By looking at the spec sheets it appears the power output rating for full bandwidth is the same as it was for the AVR-590. It could be as simple as the guy who previously designated what ratings were done how was laid off and the new guy had different ideas on how things should be rated (propably laid off the conservative guy in favor of the more trendy liberal guy). At this point it's all pure speculation.

The 4.3 amps might be a peak rating, and the 360 watts might be a nominal rating without clipping. They still weigh the same, and as far as I know they haven't switched OEM for their lower end models. When they come out look under the hood and see if anything is different on the amp section.

Another forum member pointed out that Sherwood handles or has been handling Denon's lower end receiver manufacturing for some time. From looking under the hood I can't say that I'm very surprised. There are certainly similarities among the Denon, Sherwood, and Pioneer receivers. (it's quite obvious the last few lower end AVRs from Pioneer are almost entirely Sherwood design). It's been long known that Sherwood manufactures receivers for countless other companies and has done so for a long time keeping them in business. Sherwood hasn't changed much in terms of topology for their mainstream designs, I doubt there is any difference between the amp section in the AVR-590 and AVR-591.

I don't believe this is correct. To my knowledge, the power rating located on the back of the receiver has to be accurate and measured the same way for everyone by law. The manual is a different story. Although, I could be wrong.

 

[Seth=L]

I don't believe this is correct. To my knowledge, the power rating located on the back of the receiver has to be accurate and measured the same way for everyone by law. The manual is a different story. Although, I could be wrong.

We'll have to wait for Clint or some other industry insider to comment on that I guess. I don't know how I would go about finding the answer.

 

[BMXTRIX]

I've got almost no interest in a power house product as I likely will end up with an external HDMI matrix switcher, but I am interested in the HD audio processing and support of 3D, and pre-outs which can eventually feed a really nice amplifier.

I'm really struggling with which model I should get or if I should wait for Emotiva to come out with a 3D pre-pro upgrade to their model.

My basement is likely going to be done in the next month(ish), so I'll probaby get the 2311 and tie it in.

 

[ratso]

We'll have to wait for Clint or some other industry insider to comment on that I guess. I don't know how I would go about finding the answer.

this answers it pretty well.

http://forum.ecoustics.com/bbs/messages/34579/630356.html

 

[Seth=L]

I quickly read over that and saw nothing in the article regarding published power consumption stipulations.

I did however notice something, and I believe you'll find this to be in line with most electronics. I will admit that I don't fully understand it, but I'm sure there's a simple answer.

What I have here is a picture off the back of a Panasonic receiver.

You will notice that the power consumption is provided in both VA (volt ampere). The volt amp rating as you will see is 450VA and the wattage is 350 watts. This is strikingly similar to 4.3A and 360 watts. The receiver I took a picture of is a bit older so it's possible that it may not adhere to current power consumption standard rating procedures, or it's possible that it's just not that accurate and there's always a bit of leeway.

The part I don't understand is A vs. VA. As I understand it the 4.3A is 430VA, but I'm not sure. If this is incorrect I do want to someone to point me in the right direction because I spent the last 30 minutes looking over page after page on Google and getting no answer to amps vs. volt amperes and a whole lot of watts and volt amperes. If that's the case then we see how these numbers fall into place and how it seems that the Denon AVR-391 and AVR-590 are not too disimilar from one in other in power consumption, if at all. I believe we are looking at the same amp section here ladies and gentlemen.

 

[M Code]

I don't believe this is correct. To my knowledge, the power rating located on the back of the receiver has to be accurate and measured the same way for everyone by law. The manual is a different story. Although, I could be wrong.

The power consumption specification that appears on the rear panel is based upon UL/CSA for 120V and CE/Semko for 230V. Engineering samples
are submitted for the respective agency safety approval and the brand supplies an operation guide draft and target enginering specifications. Next the safety agency checks the unit for approved internal electrical components, plastics for flamability, power transformers, fuses, connectors, AC cord/plug for compliance.

Regarding the AC power consumption specification, the safety agency checks the unit for power output as advised by the brand and current draw while closely monitoring certain internal temperatures as not exceed certain limits..
The crucial factor is how does the brand disclose power output, this is why a 4 Ohm power output is rarely stated as then the safety agency will run additional testing.

Just my $0.01..

 

[3db]

I quickly read over that and saw nothing in the article regarding published power consumption stipulations.

I did however notice something, and I believe you'll find this to be in line with most electronics. I will admit that I don't fully understand it, but I'm sure there's a simple answer.

What I have here is a picture off the back of a Panasonic receiver.

You will notice that the power consumption is provided in both VA (volt ampere). The volt amp rating as you will see is 450VA and the wattage is 350 watts. This is strikingly similar to 4.3A and 360 watts. The receiver I took a picture of is a bit older so it's possible that it may not adhere to current power consumption standard rating procedures, or it's possible that it's just not that accurate and there's always a bit of leeway.

The part I don't understand is A vs. VA. As I understand it the 4.3A is 430VA, but I'm not sure. If this is incorrect I do want to someone to point me in the right direction because I spent the last 30 minutes looking over page after page on Google and getting no answer to amps vs. volt amperes and a whole lot of watts and volt amperes. If that's the case then we see how these numbers fall into place and how it seems that the Denon AVR-391 and AVR-590 are not too disimilar from one in other in power consumption, if at all. I believe we are looking at the same amp section here ladies and gentlemen.

Volt-Amps is a measure of AC power consumption only and lacks the power factor correction which is assoicated with current leading/lagging voltage and is based on 60Hz. True power numbers will always be lower than VA numbers. In the case of receivers, I think they do VA because the true power readings would be load dependent i.e. depending on what kind of speakers and how many speakers are being driven and the frequency used to drive them.

 

[ratso]

"I quickly read over that and saw nothing in the article regarding published power consumption stipulations."

yep, my bad - i misunderstood and thought people were looking for output. sorry!

 

[3db]

"I quickly read over that and saw nothing in the article regarding published power consumption stipulations."

yep, my bad - i misunderstood and thought people were looking for output. sorry!

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