room acoustics needed for beginner in bedroom

[hardcore_gamer99]

So i have just build my 2.1 setup with Denon x4800h DALI opticon 2 mk2 and svs pb 2000 pro. Now this subwoofer is not performing i tried many settings watched many videos and evens subwoofer crawl failed. Now its time to step into the world of room acoustics. I am attaching a video that gives 360 view of my room with instructions of each wall written with my sitting distance possible. So, would like to know the best wall for wall mount where there is minimal need of room acoustics. Like i have written which wall has wooden door to left or right or open window so that acoustics can be treated according to it. As its a bedroom not dedicated ht room i would like minimum required acoustics. The main issue is subwoofer only though speakers sound best. I will be getting rid of pc table and tv unit as well from this room and will wallmount tv. So which will be best wall so that i can put my subwoofer in front only to blend with dali fronts. youtube

 

[WaynePflughaupt]

What do you mean by “not performing?” That would indicate you’re not getting any sound at all from it.

IMO a floor plan of the room (with dimensions) would be more helpful than the video.

Regards,
Wayne A. Pflughaupt

 

[hardcore_gamer99]

What do you mean by “not performing?” That would indicate you’re not getting any sound at all from it.

IMO a floor plan of the room (with dimensions) would be more helpful than the video.

Regards,
Wayne A. Pflughaupt

thank you for replying. My room is small 11x11 and height is 10 feet. When i first placed the subwoofer randomly in middle of my tv unit it was 100% null i was what is this. what do you say? In video i have talked about 3 walls that i can wallmount tv which one would you choose. so that acoustic room treatment is minimum needed as its a bedroom

 

[WaynePflughaupt]

Acoustical treatments will not eliminate the room null. Their purpose is to reduce reflections and echo. Your room is too small to have that problem.

The physics is, bass in any room is strongest when you sit close to a boundary, and it strongest at room junctions (aka corners). Perceived bass intensity decreases as you move from a corner towards the next boundary (up, down, right or left), or from there towards the center of the room. The picture below gives an idea of the situation, the red zone being bass intensity. (The picture isn’t totally accurate, as the front and back walls should also show reduced “red” at the center of the wall, as well as at the ceiling level).

This phenomenon is easily replicated by anyone with a SPL meter set for C weighting, and a broadband pink noise source: The meter reading will drop the further you move away from a corner, with the lowest reading being dead center of the room (i.e. about head level).

Thus, you’ll get the most subwoofer level the closer you sit to a wall. The worst location for the sub will be dead-center on a wall.

Regards,
Wayne A. Pflughaupt

 

[hardcore_gamer99]

Acoustical treatments will not eliminate the room null. Their purpose is to reduce reflections and echo. Your room is too small to have that problem.

The physics is, bass in any room is strongest when you sit close to a boundary, and it strongest at room junctions (aka corners). Perceived bass intensity decreases as you move from a corner towards the next boundary (up, down, right or left), or from there towards the center of the room. The picture below gives an idea of the situation, the red zone being bass intensity. (The picture isn’t totally accurate, as the front and back walls should also show reduced “red” at the center of the wall, as well as at the ceiling level).

This phenomenon is easily replicated by anyone with a SPL meter set for C weighting, and a broadband pink noise source: The meter reading will drop the further you move away from a corner, with the lowest reading being dead center of the room (i.e. about head level).

Thus, you’ll get the most subwoofer level the closer you sit to a wall. The worst location for the sub will be dead-center on a wall.

Regards,
Wayne A. Pflughaupt

where do you want me to put subwoofer?

 

[TLS Guy]

where do you want me to put subwoofer?

Where ever it sounds best.

You bought a sealed sub. A loudspeaker cone is not a very good coupler to the space in the room, so you may have to push them. A port is a much more efficient coupler to the space in the room. When it comes to good accurate bass, then a sealed alignment is my least favorite by far.

 

[hardcore_gamer99]

Where ever it sounds best.

You bought a sealed sub. A loudspeaker cone is not a very good coupler to the space in the room, so you may have to push them. A port is a much more efficient coupler to the space in the room. When it comes to good accurate bass, then a sealed alignment is my least favorite by far.

pb 2000 pro is not sealed bro its ported

 

[WaynePflughaupt]

where do you want me to put subwoofer?

Small square rooms are a challenge. The go-to recommendation is put the sub either in a corner, or no more than 1/4 wall from the corner. You can experiment further from there.

You’ll get the best perceived pass levels with the listening position against a wall. That may not be optimal for stereo imaging, however. You can move the listening position forward for better overall results, but the closer to center-of-room you get, the more bass levels will be reduced.

Basically, it’s all a compromise. You have to determine what works best for you.

Regards,
Wayne A. Pflughaupt

 

[TLS Guy]

pb 2000 pro is not sealed bro its ported

You can't trust the Internet! If you turn it up enough you should be able to get the bass you want.

 

[hardcore_gamer99]

You can't trust the Internet! If you turn it up enough you should be able to get the bass you want.

the issue is that auddeseey sets the sub volume at +12db and also in svs app i set to -8db then it gives bass i mean why so crank up?

 

[Eppie]

the issue is that auddeseey sets the sub volume at +12db and also in svs app i set to -8db then it gives bass i mean why so crank up?

+12dB is not a good result within Audyssey. You want something closer to 0dB. What level was the subwoofer volume set at when you ran Audyssey? For subwoofers with a rotary volume people usually start at the mid point. Try setting your subwoofer at a higher volume and run Audessey with a target sub volume of +/- 3dB. Then use the Audessey app to fine tune the level to your taste. I believe the app has a parametric EQ to make further manual adjustments. It helps to have a measurement microphone (like a Umik-1) and REW software to analyze what the room is doing. Unfortunately the PEQ will not make up for nulls that occur in a square room. It was already mentioned in another thread that you would need a second sub to deal with that, so you will have to settle for the best compromise based on sub placement within the room.

 

[TLS Guy]

the issue is that auddeseey sets the sub volume at +12db and also in svs app i set to -8db then it gives bass i mean why so crank up?

Audyssey is usually precisely wrong. It is OK for setting distance and the base layer speakers but not the sub or anything else. Audyssey is left OFF on all my three systems. It is only good for getting most of your settings precisely wrong.

Just set your sub level where it sounds how you want, and forget Audyssey.

 

[hardcore_gamer99]

Audyssey is usually precisely wrong. It is OK for setting distance and the base layer speakers but not the sub or anything else. Audyssey is left OFF on all my three systems. It is only good for getting most of your settings precisely wrong.

Just set your sub level where it sounds how you want, and forget Audyssey.

Rew will help with umik1 mic ? Mid level bass is not thrre or very low

 

[TLS Guy]

Rew will help with umik1 mic ? Mid level bass is not thrre or very low

Stop making life complicated when you don’t need to!

 

[Eppie]

Rew will help with umik1 mic ? Mid level bass is not there or very low

REW will show you graphically what frequencies are affected and by how much. It will not help fix your issues if you are using a single sub because the lack of mid bass is a property of your room. If you ever get a second sub, then REW might make sense to help reduce the room modes more accurately. The sub crawl is likely effective enough in your situation.

 

[WaynePflughaupt]

Rew will help with umik1 mic ? Mid level bass is not thrre or very low

I’ve had subs in rooms as small as yours before, and they sounded just fine. If it seems like mid bass is lacking, it’s most likely because you have a nasty peak in frequency response in the lower frequencies. REW can show you where it is, and parametric EQ can tame it. Then the sub should sound normal. The exception might be the unusual sub that doesn’t have enough output at the top end.

Regards,
Wayne A. Pflughaupt

 

[hardcore_gamer99]

I’ve had subs in rooms as small as yours before, and they sounded just fine. If it seems like mid bass is lacking, it’s most likely because you have a nasty peak in frequency response in the lower frequencies. REW can show you where it is, and parametric EQ can tame it. Then the sub should sound normal. The exception might be the unusual sub that doesn’t have enough output at the top end.

Regards,
Wayne A. Pflughaupt

thanks can you teach me how to find my best position for subwoofer and my sitting chair with the help of rew my new umik1 is up and ready

 

[hardcore_gamer99]

I’ve had subs in rooms as small as yours before, and they sounded just fine. If it seems like mid bass is lacking, it’s most likely because you have a nasty peak in frequency response in the lower frequencies. REW can show you where it is, and parametric EQ can tame it. Then the sub should sound normal. The exception might be the unusual sub that doesn’t have enough output at the top end.

Regards,
Wayne A. Pflughaupt

i hope this will help me umik-1

 

[WaynePflughaupt]

thanks can you teach me how to find my best position for subwoofer and my sitting chair with the help of rew my new umik1 is up and ready

There are plenty of Youtube videos showing how to use REW, and if needed you can ask for help on the AV Nirvana Forum, which is the official forum for REW. The author John Mulcahy is on staff there.

Regards,
Wayne A. Pflughaupt

 

[basscleaner]

I would recommend this technology to you: 1. Try to get most acceptable stereo position only for LF range at fixed sub position (turning off!) at zone of stereo base or close to any of speakers. The "most acceptable" means, that with minimum distortion (by quantity of peaks and dips). Not bad to remember, that it will depend of LF power points (PP) for stereo speakers in LF, and it's not necessary to follow the strict symmetry for your system: Speakers - point of listening, because this may be most important for smooth FR for LF in your room. This may be acceptable for room with proportional or equal dimensions to avoid rough mistakes. Sometimes, even 2" distance change may be surprise. 2. Turn on sub and try to add sub position (to my opinion better two) close to any speaker to correct remaining peak or dip in FR. Sometimes, even 2"... and for height too! 3. Correct first reflections and delays, caused by different distances from walls and listener. 4. Add some acoustic panels to get good RT balance. 5. Enjoy it. If necessary, add a little EQ (better not).