My Macbook also has a displayport connection. I tested that connection and it also exhibits the low-pass behavior. When I get back from vacation, I will figure out if the TVs HDMI inputs also have this fault.
Thanks for the advice. I've tried that, but it didn't solve the problem. I will try adjusting subwoofer distances in MUltEQ-X and see if that helps, but I'm wondering how you do it when you have 2 subs. Do you increase or decrease distances by the same interval or you have to do it proportionally and change the distance by the same percentage?Reverse sub phase and re measure
That looks like it would sound very good.Quite happy (besides those nulls around 60 and 75Hz, which only a second sub would fix) with the light touch that Dirac applied, but I am also a newbie on this sort of stuff, what is your opinion?
Got around to setup Dirac on my new place.
Equipment is:
MiniDSP Flex
March Purifi Amp
March Sointuva Speakers
SVS sb-1000 pro
Quite happy (besides those nulls around 60 and 75Hz, which only a second sub would fix) with the light touch that Dirac applied, but I am also a newbie on this sort of stuff, what is your opinion?
show the room and the mic being used in the room in wide angle so can see whole roomI have posted on this thread a while back but I have new 3-way speakers this year so thought I would post again. The new speakers have dual 7" mid-woofers per enclosure which puts a lot more energy into the room compared to my old bookshelf units. I have modest room treatment and prefer not to EQ so speaker position is the only "knob" to turn. Subsequently, it's pretty hard to make these graphs look pretty.
Three graphs attached. One graph is at the normal listening position with a slight toe-in. The other two are measured with the speaker pulled out from the wall and the Umik closer and starting on-axis.
I like the sound.
windows , if you open them it will should improve infersonic below 20Hz by a few extra dBCurrently, the Christmas tree is in the room, so no new photos. Attached are two older photos. The room is large (19.5' x 22.5') but not rectangular with a vaulted ceiling. The floor plan is open with adjacent rooms.
The mic is positioned behind and in the middle of the sofa when taking measurements for my listening position (not shown). The distance from listening position to the tweeter is 117".
I move the speakers around to optimize for smooth frequency and low distortion.
I think you should adjust the positioning of your loudspeakers before you use EQ, as it looks like you have some loss of energy in the range of 100 Hz to 200 Hz.
I unfortunately have this issue in my room as well, lower response in 100-200Hz range, with my Ascend Sierra-LX, which are definitely not lacking in bass. Back of speakers are about 24" from the front wall. 9 feet from MLP and about 7.5 feet or so apart. I can't really move them around beyond where everything is, short of shifting the entire room setup 90 degrees to the wall, which would put the TV in front of the fireplace. Audyssey + subwoofer overlap has helped bring this back up.
Speakers are on shorter wall of rectangular room (about 2800^3 ft) and front left is open to kitchen/hallway. Couch is mid-way into room, but not exactly half way. Hardwood floor, with rug, bookshelves, furniture, a few panels on the sides (and two behind the TV/center channel). RTA is about 300ms for most of the spectrum. I was using thicker GIK Acoustics panels behind the speakers, but this round of measuring I found that removing them fixed a few of the bass region nulls so I kept them out.
I am going to re-measure over the break, but here are a few of the graphs from when I re-did my calibration after getting a new subwoofer a few weeks ago (Monolith THX 16 - previous sub was Rythmik F12SE) and incorporating a miniDSP to do the sub's EQ instead of Audyssey. I use Audyssey Dynamic EQ but have the EQ for the sub dropped to 20Hz so it doesn't do anything extra, and limited to 500Hz~ range for the speakers as well. Did a lot of experimenting with various XO points and sub-distance to get the smoothest transition and least/smallest nulls in the combined response.
*After taking these final measurements for that night, I adjusted some of the channel levels, and also added a filter to the miniDSP to cut the sub's bass by 3~ dB at 18Hz. But I liked that the sub goes up by about 10dB from 100Hz to 30Hz with DEQ on (and 20 differential between offset setting and volume setting (eg., offset=0 and -20 vol, offset=15 and -35 vol).
I'm going to re-measure over the holiday break and make some fine tune adjustments now that I have lived with it for a few weeks. Looking forward to watching some movies now with my bigger sub. But sharing a few of the measurements from that night.
First chart is L+R together running Large, plus subwoofer in green.
View attachment 416040
Second chart is L+R+Sub with miniDSP running for the sub, DEQ off (purple), DEQ on and 20diff between offset and vol (green), and moving mic RTA measurement (at the bottom in blue). Doesn't reflect additional -3dB cut at 18Hz I added, or other level adjustments I made after taking down all the measurement equipment (hence why I want to re-measure this week).
View attachment 416041
Third is L, R, and L+R combined, pre-Audyssey
(Not shown, but I did try moving speakers 5" closer to the front wall to see if it brought up any of the 100-200Hz range or made any other significant differences, but difference was negligible)
View attachment 416047
Fourth is sub distance setting tests. This is L+R+Sub, with miniDSP EQ settings already set. Highlighted green line is the distance setting I went with (12' -- Audyssey initially set to 18) with a few miniDSP adjustments made based on speaker+sub response, and I think +3dB on the AVR level setting for the sub. The # before "Dec 13" is the distance setting in the receiver. Bottom blue line is peak with Moving Mic measurement.
View attachment 416049
*Side note -- while I was watching videos and researching how to best do miniDSP and phase/distance alignment in prep to do all of this, I found out that with Denon and Marantz receivers, you can access the Settings from a web browser. Chrome didn't work for me, but Safari does, on my Mac. You enter 192.168.0.101 (default), unless another device has taken that number (you can check the current IP address in the network settings section). This lets you access a web GUI interface to manually adjust all of the settings really easily. Great for making changes like sub distance or channel levels on the fly.
View attachment 416051
Here's my re-do, Round 2 a few weeks after getting my Monolith THX 16, paired with Ascend Sierra-LX. I still need to do some listening tests, but I will probably be able to use just Audyssey on, no DEQ for music (DEQ low level on for movies/TV and games).
I played around with miniDSP filters, XO setting, levels, etc to tone down the bass from before
Psych Smoothing
Top to bottom
Brown > DEQ On, volume vs offset = -20
Green > DEQ On, volume vs offset = -5
Brown > Audyssey Off
Orange (bold) > Audyssey On, DEQ Off
View attachment 416514
Same but with 1/6 smoothing:
View attachment 416515
Equipment:
Denon x3700h
Ascend Sierra - L/C/R
Monolith THX 16 + miniDSP
Ascend 170SE - (side) surrounds
SVS Prime Elevation - back surround and Atmos top middle
Never, Ever trust the graph Dirac presents.I finally treated us to a Dirac Live upgrade to the MiniDSP Flex. We used the 17 measurements for our wide seating arrangement. The predicted corrected curves are using the default filter design that Dirac Live offered. We use @Buckeye Amps NC252MP and @AscendDF Acoustics Sierra Tower speakers: color system diagram, photo.
The results are impressive. Everything sounds more clear and well-defined and relaxing and the bass is big and even.
View attachment 417266View attachment 417267
Just share REW measurements before and after Dirac correction.Do you mean the measured curves or what I called the predicted corrected curves?
I’m using DDRC-24 with DL and I’ve done tons of measurements.ok. ok. i deleted my posts.
the funny part is that i started this thread four and a half years ago. now i'm getting kicked out by anti-DL fundamentalists.