Originally Posted by enricoclaudio
Originally Posted by klh1790
Dude, I'm STILL struggling with bass output of my 7008. The only reason I'm not returning it and using my old AVR is sound quality. Audyssey XT32 sounds unbelievably good on my Def Tech 8060 system, but like you said, it "wants" to be in small/80hz mode to sound best. Idk why these new AVRs take away the bass from tower speakers when you have a sub or two. At least in any sound mode besides pure direct. As if everyone just has small bookshelf monitors w/ subs. I'm determined to figure this tower bass problem out with my 7008, but at its price point that shouldn't be taking me the week of troubleshooting effort I've put in already. Other than sound quality and features, I'm not a happy Marantz customer.
I have the same problem you have but with different speakers (Polk Audio LSiM 705). If you see pictures of my setup you can conclude that our problem is most related to room shape than anything else. Like you my speakers are inside a niche and for some reason Audyssey does not like speakers in niches. Let me tell you that this is not a problem related with Marantz or Audyssey XT32 because I had the same result with my previous AVR which was an Onkyo TX-NR809 with Audyssey XT.
Take a look at the EQ that Audyssey sets to my main speakers:
Fortunately I have two F12SE taking care of bass, so not a big deal for me.
You may already be in pretty good shape on this, but I see a couple of things you can try if you want to. Audyssey is trying to reduce distortion, and the walls of your niche are creating first reflections that it has trouble dealing with. From your post, you know that. But there are some things you can do to help. First, I would move the main speakers forward 3" or 4" -- just enough so that the leading edge of the speakers clears the wall edge. Second, I would try toeing-in the speakers just slightly toward the MLP. You can experiment to see whether a little, a lot, or no toe-in works best. But anything that gets them a little more away from the walls (and slightly toward you) should help. Third, try moving them just a little closer to your screen. Again, even an inch or two would help. Rerun XT-32 and you should hear an immediate improvement.
If you want to go a step further, try adding acoustic panels between the side walls of the niche and your Polks. ATS Acoustics makes some very good acoustic panels in a variety of sizes. They are very reasonably priced and matte black is one of the standard color choices. You can also go custom for a little classier look (I used micro suede) for a slight upgrade in cost. They have standard sizes that should work for you and custom sizes as well. I would recommend the 4" thickness. http://www.atsacoustics.com/cat--ATS-Acoustic-Panels--100.html
I believe that acoustic panels or some other simple treatment, would be very helpful in reducing first reflections from the side walls of your niche.
I installed some of these behind some very large floor speakers with wood paneled walls behind them. Even though I had the speakers pulled away from the walls as far as I reasonably could, I knew I had to be getting reflection (ie distortion) from the walls. When I put the panels behind the speakers and turned on my system I was immediately struck by how the volume level had gone down at the same MVL setting. Well Duh! Even though at an intellectual level I knew I had to be getting distortion, my brain had been interpreting that distortion as volume. I simply increased the volume level and enjoyed my clearer sound. Our brains are funny in the way they interpret sound. Just as we can tune out distractions to focus on a particular voice saying something we really want to hear, so apparently can we interpret distortion as volume.
25 or 30 years ago, before subwoofers were around, people used to put their speakers angled into a corner. Some speaker manufacturers even recommended that as a way to improve bass response. (Of course, I never did anything like that
). Well, it did make the bass louder and more boomy sounding, but at the expense of clarity and accuracy. It is that clarity that Audyssey and other room correction systems are trying to provide: accuracy at reference levels. But clear sound may seem quieter, so we may then need to boost either our master volume or something like the subwoofer volume to season the sound to our personal preference. Fortunately, Marantz makes that easy in the Audio control section. I hope you don't mind if I am telling you things you already know in this post. I find this subject interesting.