Digital Room Correction vs Room Treatments

@mswale I think if I wanted to move my sub around to cancel the nulls, which I think is a good idea and ideal, I’d want to get a smaller sub.  The SVS was from my old HT system in a bigger space, and while no problem to reuse for HT in my new smaller space since the AVR will use Audessey to adjust level, it’s not an ideal sub for music.  

I don’t notice the dip or that anything is lacking, but it’s probably one of those things where you don’t know until you hear the alternative.

But as mentioned above, I’m going to try bookshelf speakers first before getting a new sub or committing to room treatments or digital room correction.  The Monitor Audios that I’m using now are spec’d down to 30Hz.  The new bookshelf speakers are spec’d down to 38Hz.  So they’re bound to create less of a 35Hz peak if they’re already down 5db or more at that frequency.  At least I think.

When I measured my friend’s Electa Amator II’s, which are spec’d at 35Hz or so, there was still a peak, but much lower in magnitude.  I’m sure I’ll still have the 60Hz dip and 180Hz dip tradeoff to some extent, but the overall balance of the FR curve may give me more speaker placement and LP options to help me find a better balance.

@atp001 I’m curious about trying something like Dirac Live - the price for entry just comes at a hefty price tag and the input I’ve received from this and other forums is that it could help in some aspects, but can’t help in others.  I think I’ll wait until measure and listen to my new bookshelves and see where I am after that.

It was suggested I try the trial period of Dirac Live, I just need to figure out which EQ software also has a trial period that will allow me to use it with their software and target curves.  I haven’t had the time to do that yet.

I have implemented DiracLive three times, on both sides of my basement, and in my living room.  The sound improved in all cases.  But, I think optimizing the speaker placement and/or LP (and possibly room treatment?) before using DiracLive will get the best results.  

One element that should be considered is bias towards your current (non-corrected) sound.  I would live and test the room corrected EQ for a little while before making any conclusions.  

The cost of MiniDSP + DiracLive is not large relative to your total system cost or cost of room treatments.  IMHO, best bang for buck I could ever spend.  True, tactile improvements in sound that could not be achieved with upgrades to components, cables, or recording type.  One could argue that DSP also corrects defects in speaker response (frequency and phase).  Sorry for sounding like a salesman, but this stuff has really changed my perception of what good sound is and how to achieve it.

Just curious, what elements of sound reproduction can DSP not correct?  We often hear that room modes cannot be corrected since they are a function of how the sound interacts with the room after leaving the speakers.  I would not be so fast in making that assertion.  By modulating the phase of the individual channels separately, should it not be possible to also correct, at least to some degree, constructive and destructive interference?  I believe this is what DiracLive is capable of, but to be honest I am not sure since they are a little vague in describing how it works exactly.  I would love to hear from someone with more technical knowledge on how DiracLive works.

You have a very attractive room, small but certainly capable of being tamed with a pair of subs and a large bass trap. A small room needs lots of absorption, a large room needs lots of diffusion and a mid sized room needs some of both.

As I mentioned in an earlier post you could use the sub as a coffee table but the photos reveal 2 obvious places that will not only not get in your way but are generally from the many installations I've done the preferred positions.

First Sub: On the left wall below the window and tucked up close to the record rack.

Second Sub: Behind the couch slap in the middle of the back wall.

The obvious place for a bass trap is horizontally on the back wall where you can accommodate a full size superchunk design. See photos below, only you would build it horizontally.

I also suggest you take 2 or 3 of those slim grey panels and fix them to the door and replace them with 4" thick broad-band absorbers. To help further, consider adding heavy drapes/curtains across the window. They can be drawn aside of course but closed when needed.

Your main speakers' bass output will naturally contribute to the chaotic bass propagating around the room and by moving them only small amounts can fine tune the resultant response. Just a couple of inches.

The lone speaker at the back can be left right where it is but you should short out its speaker terminals with some wire. This will damp cone motion from pressure waves causing the speaker to act as a microphone and driving power into the crossover then releasing that power out of phase and time with music

Having the main speakers overpowering the room is a fallacy. With the room acoustics sorted this is not an issue.

Regarding your post above, changing speakers are not going to sort out the issues you are experiencing. Prove this to yourself by plugging the ports on yor main speakers which will effectively render them as sealed boxes and have the bass response roll off earlier at 12dB/octave. This will immediately show up on REW and it costs nothing but a little of your time, it's also informative. There is no need to settle for a ragged response. In one of the photos you can see a DIY absorber that is usually 4" deep but I made these 5" deep for them to work lower in frequency. My wife said she does not want me to go 6" deep.

You can also build a ceiling cloud to suspend from the ceiling which is very effective. Use REW to check your decay times as I mentioned in a previous post. This is a scientific approach to sorting out a room's acoustic problems which each and every room suffers from regardless of shape or volume. Fact.

Start of bass trap left front corner.

Bass trap waiting for cover to be attached with velcro.

Bass Trap right front corner finished with cover on and heavy drapes visible

@lemonhaze Great suggestions, thanks so much!  
 

I’m assuming modest sized sealed subs would do for a room like mine.  I see REL subs favored by a lot of audio people.  Is this what you’d recommend?

Whay type of fill do you use for your triangular traps?  And you’re saying build it horizontally and put it above my wall cabinets across the entire back wall at the interface between wall and ceiling?   And you’d go as thick as I could go, up to and including 6” if I can swing it?