Denon pre-amp mode sound quality vs utilization of internal amps

P

PENG

Audioholic Slumlord
As HD said, Deq is a loudness contour that address how we hear at lower volumes. It’s effects get lessened the closer you get to reference(mv-0). It looks like this.

It mainly focuses on bass, but does boost the treble as well. It also boosts the surround levels, and rear height/too levels too. I don’t use deq as I use a minidsp to set a house curve and I HATE that it boosts surround and rear tops. Ymmv.
I also dislike dynamic volume and have no use or need for it. Tricks? Not necessarily, but they are very powerful.
Hello William, thanks again for posting this graph. I think I asked this question before but forgot the answer, is the above curve you (or someone) saved from the Audyssey website way back before they removed them? I remember saving one like that myself but could never found them in the many hard dives I have had over the years.

Audyssey has done an excellent job removing those curves they definitely published, must have swept cleaned them on the internet too as I couldn't even locate any trace of even cached information.

I just plotted my own the other day, haven't compared them with those shown in your graph yet.
 
P

PENG

Audioholic Slumlord
So, the gain structure on the AVM70 it would cause what… double the clipping for emotiva’s?
Assuming by double clipping you mean really bad clipping, to the point the waveform would approach that of a square wave. In that case, my answer then is, not likely. Most good recent AVRs or AVPs nowadays should have protection to limit the preamp output or shutdown the unit down well before clipping would result in damages, though some speaker's tweeters could be at risk. As for the Emotiva power amp, if you drive the AVM70 to output more than 4 V, you will be the protection as you won't be able to stand the badly distorted sound due to clipping. If not, the amp's protection scheme may shut it down on time before the amp, or the speakers, or both gets damaged.

Having said that, nothing is 100% guarantee, over driving an amp, especially power amps, could still cause damages so in most cases your ears are your best bet to protect anything bad to happen to your investment.
 
William Lemmerhirt

William Lemmerhirt

Audioholic Overlord
Hello William, thanks again for posting this graph. I think I asked this question before but forgot the answer, is the above curve you (or someone) saved from the Audyssey website way back before they removed them? I remember saving one like that myself but could never found them in the many hard dives I have had over the years.

Audyssey has done an excellent job removing those curves they definitely published, must have swept cleaned them on the internet too as I couldn't even locate any trace of even cached information.

I just plotted my own the other day, haven't compared them with those shown in your graph yet.
Hi peng!
I saved that graph from another forum where, iirc, the user took the measurements directly from one(or two) of the main preouts.(although it’s probably not impossible that it was the LR speaker terminals)
The idea was to show exactly what deq was doing without the in room FR getting in the way. I didn’t know audyssey actually published their own graphs. That would be fun to see. Also, if you share yours, I’d look forward to that as well.
I always like to share this one because it’s hard to visualize what’s going on with deq and the FR changes vs MV. Most people know that it boosts the bass, but clearly it’s more than that. I’d like to see something referencing what it does to surround and rear top levels vs MV too. I do kinda like the bass curve it applies(don’t use it though) but the surround/too boost is annoying.
 
P

PENG

Audioholic Slumlord
Hi peng!
I saved that graph from another forum where, iirc, the user took the measurements directly from one(or two) of the main preouts.(although it’s probably not impossible that it was the LR speaker terminals)
The idea was to show exactly what deq was doing without the in room FR getting in the way. I didn’t know audyssey actually published their own graphs. That would be fun to see. Also, if you share yours, I’d look forward to that as well.
I always like to share this one because it’s hard to visualize what’s going on with deq and the FR changes vs MV. Most people know that it boosts the bass, but clearly it’s more than that. I’d like to see something referencing what it does to surround and rear top levels vs MV too. I do kinda like the bass curve it applies(don’t use it though) but the surround/too boost is annoying.

Thanks again, Audyssey definitely published their own FR curves at different MV just too bad I could not find them.

Below are what I have now, taken a few days ago:

1665329561672.jpeg


The first two curves are DEQ off vs DEQ on but at MV=0, you can see that the bass boosts are virtually 0 as expected.
 
William Lemmerhirt

William Lemmerhirt

Audioholic Overlord
Thanks again, Audyssey definitely published their own FR curves at different MV just too bad I could not find them.

Below are what I have now, taken a few days ago:

View attachment 58089

The first two curves are DEQ off vs DEQ on but at MV=0, you can see that the bass boosts are virtually 0 as expected.
Nice. Looks like it follows the target as you’d expect. @Pogre did some in room measurements too illustrating deq. I think saved them. I’ll dig around and see!
 
N

New_Guy

Enthusiast
Well fellas. I done fooked up.
Never shoulda let curiosity go this far.

But now that I’ve had time to play with and experience the Anthem AVM70, idk that I can go back.

I’m unsure if it’s ARC genesis, or the DACs or having all external consistent power of what… but this is by far the most invigorating my setup has ever been.
(I think external power can be ruled out as the greatest contributing factor, as I rocked the x4700h in full preamp mode, and the experience was not even close).

I’m well within the return window (had this, roughly 48hr) but now, I’m worried I won’t exercise it.

You see, funny enough: I chose to save 500$ (Cuz the AVM70 is a lot of money as far as I’m concerned), and chose the 4K version…. Sure enough I received the most battered unit of all time (luckily I had the wherewithal to document the package opening after what I initially saw)… spoke with customer service (shared my documentation and concern/ distain) and the retailer upgraded me for free. So now, I have the 8k version of the AVM70 (500$ increase in price), and audibly, it’s significant enough of a change, that I’m dreading having to return it (and go back to the 4700)…

So here I am, and thanks to the inconvenience of initially getting a unit that was surely used for field goal practice, I have the 500$ upgrade (8k) free of charge (my position on having to pay for that upgrade is 100%: “get outa here” but that’s a different discussion).

ARC genesis, the DAC set, 100% external amp power, the AVM70… the totality of it all (with respect to the Denon x4700h) = legit, next level.

I would love to decouple these factors to understand where the magic is coming from, but I have to say….. there’s new magic here.

Please, someone, tell me to return this.
Be convincing, cuz I’m sorta in awe.
 
N

New_Guy

Enthusiast
For the record, I opened this discourse for learning/ discussion purposes, in parallel I chose to make a comparative purchase (learn, and enable a “true” pre/pro comparison w/ something regarded as on the same level as the Denon).
I in no way whatsoever expected to land in my current position.
 
lovinthehd

lovinthehd

Audioholic Jedi
Personally I have a hard time thinking the ARC is that much better to justify the additional cost but I'd definitely use much more powerful amps if I went full external, too. I'd like to try ARC as well as Dirac and Trinnov too but heck I can't even use the Audyssey Editor App as my Denons are slightly older. Personally I'd probably do setups again with both, preferably in different rooms....before I had to make the return decision. Twice the cost better be one helluva difference :)
 
P

PENG

Audioholic Slumlord
Well fellas. I done fooked up.
Never shoulda let curiosity go this far.

But now that I’ve had time to play with and experience the Anthem AVM70, idk that I can go back.

I’m unsure if it’s ARC genesis, or the DACs or having all external consistent power of what… but this is by far the most invigorating my setup has ever been.
(I think external power can be ruled out as the greatest contributing factor, as I rocked the x4700h in full preamp mode, and the experience was not even close).

I’m well within the return window (had this, roughly 48hr) but now, I’m worried I won’t exercise it.

You see, funny enough: I chose to save 500$ (Cuz the AVM70 is a lot of money as far as I’m concerned), and chose the 4K version…. Sure enough I received the most battered unit of all time (luckily I had the wherewithal to document the package opening after what I initially saw)… spoke with customer service (shared my documentation and concern/ distain) and the retailer upgraded me for free. So now, I have the 8k version of the AVM70 (500$ increase in price), and audibly, it’s significant enough of a change, that I’m dreading having to return it (and go back to the 4700)…

So here I am, and thanks to the inconvenience of initially getting a unit that was surely used for field goal practice, I have the 500$ upgrade (8k) free of charge (my position on having to pay for that upgrade is 100%: “get outa here” but that’s a different discussion).

ARC genesis, the DAC set, 100% external amp power, the AVM70… the totality of it all (with respect to the Denon x4700h) = legit, next level.

I would love to decouple these factors to understand where the magic is coming from, but I have to say….. there’s new magic here.

Please, someone, tell me to return this.
Be convincing, cuz I’m sorta in awe.
I would bet in a controlled AB comparison that follows the DBT or even SBT protocol the two will sound the same to you unless DSP functions are used. Yes the Anthem has better DAC than the Denon that has downgraded the DAC months after the AKM factory fire, but even the difference in the audio specs are not enough to result in audibly better sound quality.

With DSP functions in use, such as Audyssey and AARC, then which one sounds better would depend on your personal preference. So I think the main contributors will likely be a) you prefer the effects AARC and b) expectation, that the AVM70 costs much more, is a so called "separate" and that you have been told to expect such a more expensive "separate" will sound better. These are factors that are very difficult for the average consumer to accept. Dr. Toole, in one of his videos and I believe in his book too, said .."if you know which one is playing, I don't care what you think..." (may not be word for word as I am quoting him by memory). And he's was just talking about speakers listening comparisons. We all know it is much easier to tell how different speakers sound than how preamp, dac, power amps sound. So while I understand many people feel in their own AB comparison they heard big difference, even night and day difference, they didn't realize such perceived difference were still due to bias that they failed to control/removed.

Regardless, having read all you posts carefully, I would strongly suggest you return the Denon. In terms of the so called "sound quality" thing, facts don't matter that much. It is what you perceived under all sorts of influence, that truly matters. Facts (for example, that the two may actually sound the same in direct mode with no dsp can only be discovered if you can do an instant AB listening comparison that is a truly apple to apple test, and one that follows the DBT protocol. Such controlled tests are virtually impossible for the average hobbyist to do at home. So in almost all cases, bias (all kinds) rule!!

In this case, money buy happiness. You may feel the initial pain of having to pay more, but now you have tested the Anthem and feel that it sounded like a "next level" to you. So if you keep the Denon, there is a good chance that you may regret your decision for a long time.
 
P

PENG

Audioholic Slumlord
Personally I have a hard time thinking the ARC is that much better to justify the additional cost but I'd definitely use much more powerful amps if I went full external, too. I'd like to try ARC as well as Dirac and Trinnov too but heck I can't even use the Audyssey Editor App as my Denons are slightly older. Personally I'd probably do setups again with both, preferably in different rooms....before I had to make the return decision. Twice the cost better be one helluva difference :)
Me too, and I am still planning on getting the AVM70. After that I will know what the hype is all about in this Audyssey vs Dirac Live vs AARC thing.:D Based on the numerous graphs I have seen on the internet, I did not see any obvious reason for one to "sound better" than the other. To me, it's 90% about how much efforts the operators put into setting things up. Regardless, it will be fun to play with AARC for sure.
 
G

Golfx

Senior Audioholic
Took receipt of a emotiva bas-x A6 today, which allowed me to go full pre-amp mode on the Denon x4700h (A3 powers front stage, A6 powers surround + 4 Atmos channels. Arendal 1961 bed including both subs (1s), RSL in-ceiling for Atmos).

I’m not sure how to articulate it, without sounding cliche, also totally plausible it’s 100% placebo, BUT: my system does seem to sound clearer, and larger/deeper/wider (idk).

I want to A/B with the anthem AVM70, cuz I’m an idiot, who is far too curious, and apparently willing to set himself up for silly/ expensive decisions (the AVM70 is arriving this weekend)...

But honestly, at this point, I think the A/B is a waste of time, current configuration seems real legit.

As is, it’s wholeheartedly fulfilling, immersive, and pretty awe-some.

This HAS to be the point of diminishing returns, surely, I don’t see the anthem (or anything), sounding 4k$ “better”.

I’ll touch base later….
Welcome. You made me smile.
 
N

New_Guy

Enthusiast
It’s really hard for me, as going into I was sure I’d reached the only obtainable threshold, with the Denon in pre-amp (real or perceived).
Trust me, I was biased going in… “of course this is the threshold of diminishing returns”

I’m not wealthy. And 3500$ is a substantial cost as far as I’m concerned.

At this point, honestly… I’m wholly unsure if the defining factor is purely internals (Denon vs Anthem), or ARC Genesis or the combo….
But, it’s wild, the nuisance, depth of sound.
It was… wide and I was noticing new things with the Denon, for certain. But, how it’s hooked up now… idk kinda feels like, watching a movie, then watching a movie in 3D. There’s jus all sorta wild stuff goin on.
It’s expensive, I knoooooow.
And im not a fan of that.
Im going to try to talk myself out of it for the next couple weeks.
I’ll throw the x4700h back in the mix for a few days at a time too.
Idk man. Right now, I’m unsure which config will have the greatest buyer remorse…
Too much money, or not as… “compelling” an experience.
Also I know the 3800 is in the pipeline, but that’s going to be 600$ more as a baseline to get dual sub Dirac integration, and that’s lame! So, when it’s all said n done, that’s going to be like 2500… at which point, is the better dac’s, XLR, greater channel count and arguably equivalent RQ (Dirac + dual sub vs ARC genesis which does dual sub anyway, included) worth the 1k$?… maybeeeee?

I’m worried I’m going to focus on selling the x4700 to reel back the pain.

We will see. I’m going to do my best to make a reasonable decision here.
 
N

New_Guy

Enthusiast
I do appreciate your guys input.
Lovinthehd and Peng, you’ve both helped provide perspective, thank you.
 
N

New_Guy

Enthusiast
I feel like it’s worth noting…
I bought the desktop MultEQ X, some time ago, and spent more time than probably reasonable, taking and retaking measurements, modifying curtains and crossovers to combat room modes, using measurements to help find ideal speaker placements…. I’m no expert, but I’ve spent time in the trenches wit my setup.
I think ARC may very well be the differentiator here. But there’s too many fundamental differences to say for sure.
I love my Denon, and I’ve had many… quality product.
This is just a different thing (so far).
I’ll continue to tinker. See if I can take learnings from what ARC is doing, and apply them to my starting setup, and see what can translate.
As well as just switch back n fourth as best possible.
My goal here has not been: spend ALL the money.
It’s been, curiosity + a bunch of tweak listen, learn, tweak listen learn… curiosity.
Hopefully the shiny new thing, thing will dissipate, and I can be more discerning and as analytical as possible, up until my return date.

Speaking of.
What’s the fundamental technology behind REW? Is it simply SPL as a f(x) of frequency?
Or might it have some functionality in the realm of phase, amplitude, harmonics?
I’m not opposed to getting a umik and REW, and trying to provide myself (or y’all) some sort of quantitative comparison.
 
Last edited:
P

PENG

Audioholic Slumlord
I feel like it’s worth noting…
I bought the desktop MultEQ X, some time ago, and spent more time than probably reasonable, taking and retaking measurements, modifying curtains and crossovers to combat room modes, using measurements to help find ideal speaker placements…. I’m no expert, but I’ve spent time in the trenches wit my setup.
I think ARC may very well be the differentiator here. But there’s too many fundamental differences to say for sure.
I love my Denon, and I’ve had many… quality product.
This is just a different thing (so far).
I’ll continue to tinker. See if I can take learnings from what ARC is doing, and apply them to my starting setup, and see what can translate.
As well as just switch back n fourth as best possible.
My goal here has not been: spend ALL the money.
It’s been, curiosity + a bunch of tweak listen, learn, tweak listen learn… curiosity.
Hopefully the shiny new thing, thing will dissipate, and I can be more discerning and as analytical as possible, up until my return date.

Speaking of.
What’s the fundamental technology behind REW? Is it simply SPL as a f(x) of frequency?
Or might it have some functionality in the realm of phase, amplitude, harmonics?
I’m not opposed to getting a umik and REW, and trying to provide myself (or y’all) some sort of quantitative comparison.
Since you have MultEq X, can you try the following, if not yet?

First it goes without saying that with Audyssey you must follow the instruction to the letter, with a few minor exceptions. For example, make sure the room is quiet, with HVAC off for sure (wife may complain but she can put on a jacket if too cold during the 30 minute auto setup), and use at least 6 mic positions with 20 to 18 inch (manual says 24 inch, but..) between each positions, mic points straight up to the ceiling and make sure it is at least an inch (I would go with 2") above your couch back (instruction says ear heights, but..).

The 2 suggested rear positions shown on the screen should be avoided unless your couch is a few feet away from the wall. I know all these seem trivial but I found that they are important factors. AARC may be less sensitive to those minor details.

1) Limit the EQ range for all channels to 6,000 Hz, or as low as 300 Hz just to level the playfield.
2) Before you send it to the AVR, select the default roll off setting (though if you did 1), if wouldn't matter much.
3) Enable DEQ, disable DV
4) Adjust the target curve to match that with AARC's. It may be hard to match them exactly but just try your best.

For the EQ range, it may be better to limit both to 300 Hz just to make sure if that closes the gap between the two devices being compared. Both allow you to select multiple profiles anyway so you can set to range to higher, such as 6000 Hz later.

If I remember right, the Denon allow you to save two profiles, so when running Audyssey using MultEQ X, you should save two files, one with MRC enabled and the other disabled. Then you can send both to the AVR and can flip between the two to find out which one sounds better to you.

Keep in mind, any changes you made, will not affect the flat curve so you must select the reference curve during you comparison listening sessions. MRC is NOT disabled even if you use the flat curve unless you select MRC "disabled" between sending the files to the AVR.

I suggest the above only because you clearly are trying to be as objective as possible, before spending the extra dollars. So while you still have time, take the opportunity to do more fact finding.

Like @lovinthehd, @AcuDefTechGuy , @Pogre , @Verdinut and a few others, we are the ones who can say, been there, done that..... That is, we have spent all sorts of money on preamp, power amps (so called separates), even external dacs, sacd/universal players (Oppo, Denon...), and we learnt over the years that electronics are factors for sure but it is not hard to get pass the point of diminishing return that you mentioned. Once you are at or near that point, the dominant factors are always the following:

- speaker, room acoustic, RC software (hence the debate on Audyssey vs AARC, vs DL vs Trinnov vs MSO, vs Roomperfect vs minidsp/REW et...).

- source contents, in terms of genres, recording, mastering quality (that are also dependent on the quality of the equipment/devices (e.g. mics, mixers) and the knowledge, skill, talent, style of the recording engineers etc.

As someone who has been in this hobby for decades and have done extensive reading in related topics, I am very confident to say whatever differences between the two you are hearing are not caused by the hardware, and that if compared blind, level matched, in direct/pure direct mode they will indeed sound virtually the same when operating within their limits.

My recommendation earlier on keeping the Anthem and return the Denon is only based on all else being equal, since you clearly prefer the "sound" of the Anthem, in the long run it may be easier to forget the extra money you spent than to forget about the better sound whether that better is real, Placebo, or both.

I find your posts/questions most interesting because while you appear to be one who are lean on the subjective side, you also don't give up easily on the objective measurements and the perceived value of the much cheaper Denon based on the costs.

The reason I mentioned a few other members (HD has already done his part..) is that I know they are very experienced in this field. Some, such as @AcuDefTechGuy had actually owned one of the best AV preamp/processor ever made, in the time before the object oriented sound processing such as Atmos, DTX:pro, as well as some very powerful external amplifiers. I thought may be those guys can chime in and help you make a final more informed decision.
 
AcuDefTechGuy

AcuDefTechGuy

Audioholic Jedi
I’m not wealthy. And 3500$ is a substantial cost as far as I’m concerned.
I think $3,500 is a substantial AVR/AVP-cost.

I used to own the $7,500 Denon AVP-A1HDCI AVP and some ATI (300WPC amps), as @PENG alluded to. I've also owned the $5,500 Denon AVR-5308. Also owned Revel Salon2, B&W 802D2, KEF Reference, Linkwitz Orion, and others.

So I guess I've had my shares of spending some money in this hobby over the years.

But I don't know about telling anyone that they shouldn't buy separates or focus too much on room correction software - even if I don't think they should. :D

The reason is because most of the time, it's about our desires/wants, not about what we actually need or some significant improvements.

Do I need a new iPhone 14 Pro Max when my Samsung S9+ works perfectly? No, but I want the iPhone anyway.

It's the same way I see AVR vs Separates or Room Correction. Most of the time, I don't think it's about significant improvement in sound quality. I think it's about your desires/wants in this hobby.
 
P

PENG

Audioholic Slumlord
Speaking of.
What’s the fundamental technology behind REW? Is it simply SPL as a f(x) of frequency?
Or might it have some functionality in the realm of phase, amplitude, harmonics?
I’m not opposed to getting a umik and REW, and trying to provide myself (or y’all) some sort of quantitative comparison.
It can do much more than just FR, but people do use it for that a lot and they would post them for comparisons. Below are some examples:

Anthem's:

REW graphs using various Anthem ARC settings help needed | Audioholics Home Theater Forums

Audyssey:

The Audyssey MultEQ Editor app users thread (with facts and tips) | Audioholics Home Theater Forums

Audyssey's Next Generation of Room Correction (MultEQ-X) | Page 16 | Audio Science Review (ASR) Forum

Graphs from REW | Page 2 | Audioholics Home Theater Forums

Dirac Live:

The fantastic Dirac Live thread – READ 1st POST before posting | Page 240 | AVS Forum
 

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