Hello everyone..
Need some advice about room treatment
I'm using my bedroom for my listening dan watching room, the dimensions is considerably small? it is (3,8m length x 2,8 width , and 2,7 height) checked on amroc website, i think the room is far from ideal.. because the height and the width is pretty close, so it has similar room modes..
My setup is:
1 15 inch sub
with 2 floorstanding speaker (DIY, just simple 2 way woofer and tweeter)
My main issue is the bass region kinda boomy? especially on the modes,
my speaker placement is also limited, some says put it as close as possible to the back wall, but measured with REW it doesn't do better than i place it like 90cm from the back wall..
Recently, i made my own bass trap with 40x40x120cm dimension (i believe the size is similar to sofit bass trap, i place it on the bottom left on my room)
Measured with REW it does help with the decay time, but for the frequency response is not that huge of a difference..
Is there a decent solution for this issue?
1. Should i get more bass trap? If this the case, where is the most effective, or should i just follow the amroc guide?
2. Is dual sub would at least help with this issue? with proper phase and time alignment
3. Or i should just be happy with my current setup because small room would never be a good options for listening room..
I attach front of my room, back and the side where i place my bass trap.. Pardon for my messy bedroom, gonna clean and tidy up soon..
Thank you all, sorry for my english, because it is not my primary language.
Need some advice about room treatment
I'm using my bedroom for my listening dan watching room, the dimensions is considerably small? it is (3,8m length x 2,8 width , and 2,7 height) checked on amroc website, i think the room is far from ideal.. because the height and the width is pretty close, so it has similar room modes..
My setup is:
1 15 inch sub
with 2 floorstanding speaker (DIY, just simple 2 way woofer and tweeter)
My main issue is the bass region kinda boomy? especially on the modes,
my speaker placement is also limited, some says put it as close as possible to the back wall, but measured with REW it doesn't do better than i place it like 90cm from the back wall..
Recently, i made my own bass trap with 40x40x120cm dimension (i believe the size is similar to sofit bass trap, i place it on the bottom left on my room)
Measured with REW it does help with the decay time, but for the frequency response is not that huge of a difference..
Is there a decent solution for this issue?
1. Should i get more bass trap? If this the case, where is the most effective, or should i just follow the amroc guide?
2. Is dual sub would at least help with this issue? with proper phase and time alignment
3. Or i should just be happy with my current setup because small room would never be a good options for listening room..
I attach front of my room, back and the side where i place my bass trap.. Pardon for my messy bedroom, gonna clean and tidy up soon..
Thank you all, sorry for my english, because it is not my primary language.
Attachments
1. Bass traps are ok, but your bed already with its size works like a bass trap. It is near wall, so almost perfect placement. The best placements - corners. Big wardrobes with closed or open doors - also act as bass traps. You have them both. Your current wall treatment is ~10cm thick, so my wild guess is it works in 1,5-5kHz range. For lower freq you need thicker and bigger stuff (like bed). For higher freq the surface of stuff itself plays bigger role, but that is not important, as in your current setup it is even too much.
2. Don't know personally, overall wisdom says it will. Maybe instead moving main speaker try to move sub around instead and reduce its level? Boominess may be an effect of poor sub design, and higher frequency artefacts coming from them, or just too much SPL
3. You already have room and will probably not change.
That room looks like over-treated. I think that the speaker itself requires to be evaluated, maybe its tonalities are not ok.
How do you describe boominess? The one that shakes stomach too much, or just the extra cow-like "Moo" at the end of the low kick drum? If the second one - try to EQ down 100-200Hz.
2. Don't know personally, overall wisdom says it will. Maybe instead moving main speaker try to move sub around instead and reduce its level? Boominess may be an effect of poor sub design, and higher frequency artefacts coming from them, or just too much SPL
3. You already have room and will probably not change.
That room looks like over-treated. I think that the speaker itself requires to be evaluated, maybe its tonalities are not ok.
How do you describe boominess? The one that shakes stomach too much, or just the extra cow-like "Moo" at the end of the low kick drum? If the second one - try to EQ down 100-200Hz.
Move around the room (sitting on the floor) and listen to where the boominess is less. Put the sub there.
The smallest, most effective bass trap is another sub.
In a multi-sub arrangement the 15" would go in the corner where it reaches all modes, then the smaller subs are used to trim the peaks and fill the gaps.
In a multi-sub arrangement the 15" would go in the corner where it reaches all modes, then the smaller subs are used to trim the peaks and fill the gaps.
Hey thanks for your reply..
The boominess from 80-90hz, when i play this freq with tone generator, it is just all overwhelming. If i check the decay time maybe that is the problem, ringing. The frequency responses also show this peak.
For the sub i think is ok, not perfect but decent, it was in the larger living room and it sounds just ok, but in my bedroom is different..
I agree i think my room is over treated, actually the projector screen is stuffed with rockwool, might remove it later with proper projector screen without any stuffing inside..
And i think i will try my best without EQing anything if that possible..
Attachments
If that's what you have, I'd expect reasonable performance from them. The more you have, the smaller they can be.
In a conventional multi-sub arrangement, the first one has a unique role.. however the beauty of it is that as long as you understand the concept, you can implement it as you see fit.
In a conventional multi-sub arrangement, the first one has a unique role.. however the beauty of it is that as long as you understand the concept, you can implement it as you see fit.
One thing you could try is to supplement the main speakers and the 15" sub with 2 small subs (bass modules) on side walls raised from the floor.
In this Room simulation the main speakers are quite narrowly placed relative to listening position, so the small side subs can compensate the narrow placement and give you wider soundstage when run in stereo. You can think of them as a kind of separate low-mid bass woofers and not actual subwoofers, the bigger sub can handle the lowest frequencies. Might give you some headroom as an added benefit.
Try different setups in Room simulation to see if you can find a good compromise between listening position and speaker placement.
Examples from my setup and frequency response
I have 12" closed subs on side walls on stands at ear height to fill 45-85Hz dip/valley caused by main speaker placement restrictions and an additional sub on the front wall.
Blue: Genelec 10" sub, red/green: diy 12" closed subs in stereo, upper red/green diy 15" coaxials
In this Room simulation the main speakers are quite narrowly placed relative to listening position, so the small side subs can compensate the narrow placement and give you wider soundstage when run in stereo. You can think of them as a kind of separate low-mid bass woofers and not actual subwoofers, the bigger sub can handle the lowest frequencies. Might give you some headroom as an added benefit.
Try different setups in Room simulation to see if you can find a good compromise between listening position and speaker placement.
Examples from my setup and frequency response
I have 12" closed subs on side walls on stands at ear height to fill 45-85Hz dip/valley caused by main speaker placement restrictions and an additional sub on the front wall.
Blue: Genelec 10" sub, red/green: diy 12" closed subs in stereo, upper red/green diy 15" coaxials
Why not eq?
I'd try easy and cheap things first: use an eq to attenuate the peaks. Did you already try?
Eq can't do anything to fix a null, but for attenuating peaks, it works quite well.
You need to find the frequency peaks and necessary Q.
Then adjust the attenuation in order to have a smooth FR when you sweeping from 20Hz to 500Hz.
Something is funk'd up. Can you share the .mdat of that measurement to try to troubleshoot what is going on?
Thanks! What microphone you're using and where is the mic located when measuring?
There's something very wonky compared to your previous graphs in the post #6.
This is my first suggestion, and the only way I've had good luck in smaller rooms. Perhaps the benefits are there but you just aren't sure what to look for.
More bass trapping is unlikely to change much. As another user mentioned, the best bass treatment is more subs and this is true tenfold. I'd wager four 8-10" subs placed around the room would outperform the 15" just due to how bass works in rooms. Bass issues really don't care how much surface area or SPL you can pump out, the wave interactions are so strong that higher volumes and displacement just make the problems worse.
In general the various types of passive bass treatments out there typically fall between a range of "this thing doesn't even affect the bass" to "it works but has a very mild effect", all the way to "it works great but the space requirements are completely impractical".
You NEED EQ on bass. Frankly, every setup needs some EQ to alleviate room interactions. You complain of an 80hz wave, so have you not tried applying a cut there?
The mic is behringer ECM8000.
I remeasured because the previous mdat was deleted.
The mic located somewhere in the middle but not exactly, maybe 60% from the front wall
I'm going to add 2 more 8 inch subwoofer for now, and 2 more later..
Last night i watched some Anthony Grimani podcast about subwoofer, he said that 4 small subwoofer, and another 1 giant subwoofer for the really low end frequency and play with the crossover settings maybe?
I think i should try tweaking with 2 small subwoofer and 1 giant subwoofer for now, if the measurements show promising results, i might go with 4 8 inch subwoofer and sell the 15 inch? still not sure
And i will try to EQ after 2 more subwoofer added, because if EQ with single sub, it will sounds very different across seating area..
Anyway thank you for your response.