The Listening Room Reality

Maybe a projector if you really need the screen

I moved my TV out of the living room music area …

I agree. It took me a long time to realise my TV which is in the middle of speakers was causing some nasty HF reflections. I cant remove it as nowhere else for it to go, but I moved it further back to the wall and speakers more forward and viola an improvement. Still have a low-end issue which is due to my listening position which can’t change . Tried some traps but they did not get passed the other half . I can’t go for really thick panel either. Been looking at the gik traps and adding photos to get printed on it. She’s ok with that idea. Having trouble deciding on what pictures to use is now the hard task.

Tools to understand, explain or improve your room acoustics:

The ultimate BassTrap

AVAA C20 Active Bass Trap by PSI Audio

This is an active bass trap that effectively absorbs frequencies below 150 Hz , like a hole in the wall, or an open window, would do. A costly but perfect solution for rooms under 50 square meters.
I’ll probably try one of those :smiley:

What it is, and how it works:


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Another PSI Audio AVAA C20 active bass trap review


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An interesting/funny video about the one reality most of us ignore, consciously or not:

Even in the best treated listening rooms we can’t avoid distortion (comb filtering), especially in the low end.


The video ends with some nice and free advises.

The more I learn about room acoustics, the more obvious becomes the following fact:

The room is probably the most important part of a music reproduction system. Speakers being only second on the list.

Therefore, are headphones the ultimate music (stereo) reproduction systems? :thinking:

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You can, by ‘soffit mounting’ the speakers, so their front baffles are flush with the wall (but angled walls may be necessary, and in practice likely requiring a false wall). That’s how recording studios do it.

Hey there peter what brand are these acoustic panels? Look good. Thanks

Hi Mon. The woody patterned panels on side walls are GIK Impression panels and the corner absorbers ( grey ones) are GIK Soffit bass traps and they proved superior over my first attempt with HOFA corner bass traps. ATB Peter

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The basics by GIK Acoustics.
A nice, non technical, sum up.



Hi Thomas, as you state a nice quick guide to room treatment- most of us get there in the end, but patience is indeed a virtue in the process :roll_eyes: ATB Peter

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I wondered if I could pick the brains of those who have successfully installed acoustic treatment. I am primarily looking to treat the front and back walls and install some corner bass traps. I have committed the cardinal sin of placing a TV between my speakers. However I am looking to place GIK art panel for diffusion/absorbtion above the TV. I am also considering 2 verifusors which can be placed in front of the TV for listening sessions and they fit/hide perfectly behind the TV when not in use.
The biggest problem is the back wall which comprises of a window about 3 feet behind listening position. Again I have considered verifusors which can hide behind the sofa and be placed on the window ledge for listening sessions. However do I need more distance between my ears and window for diffusers to be effective. If so would absorbtion panels be better? Again they could probably not reside there permenantly for obvious reasons. I could place them behind the sofa stand vertically for listening purposes.
I am considering REW before bass traps. The main sticking point is going to be treating first reflection points from a room aesthetics stand point.

Hi Stu, yes 3 feet exactly the same distance as me absorption rules, however I have used this combined absorbtion/ diffusion product from GIK to success. Mine are permanently there as it is a dedicated hifi room, but not too heavy to move around if needed :+1:t3: Good luck with it ATB Peter

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Thanks Peter. It looks like you were attempting to absorb a significant amount of bass frequency as well as upper and mid diffusion. My speakers don’t produce a significant amount of bass energy so I was hoping to maybe absorb/diffuse mid to upper frequencies. Maybe some smaller tuned bass traps in the corners? Do your curtains contribute to damping higher frequencies?

Hi Stu, my curtains are light to medium lined and seem to reduce high frequency reflections in the right proportion. From my own experiments with the back wall trying to line the wall behind the curtains also with old fashioned 10 mm wool carpet underlay seemed to have an effect of sucking the liveliness out the room, so abandoned that. Nothing in the game of room treatment is a given it seems :+1:t3: ATB Peter

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For those who have used REW, is it difficult to set up and use? I am a neanderthal with all things technical. I will send the results to GIK for analysis and advice. Will order mini dsp usb mic to take measurements them I presume it is headphone out of laptop to phono inputs of 272?

A question for PeterR , although any other comments welcome , as i see you have diffusion/absorption on your rear wall.

My rear wall , as shown , has 2 GIK range limited Monster bass traps behind the curtains sitting on the window sill. There is nothing wrong with this.

But im wondering , as you do , what would be the effect of using 2 GIK Q7d diffusors either in place of the Monsters , or with the Monsters but mounted on the wall between the curtains and TriTraps. There is just enough room to fit them there.

Thing is i previously tried GIK Alpha panels , which are not what i would call true diffusion , where the Monsters are and did not like the result. They seemed to mess with the imaging.

Ideally would like to open up the rear of the room without affecting the imaging/depth/soundstage of the speakers.

So any thoughts or comments please

It is pretty easy to set up, and tgat is how I connected it. Alternatively, and avoiding any limitations of the computer’s analogue output, if you have a digital source you can record the test sound and play it as you would music. I haven’t done that myself, though I will next time. I’m sure if you get stuck then several on here will repond.

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Thanks IB will report back once I get up and running.

The way I did it was:

Input miniDSP UMIK-1 -> USB
Output USB -> (cheap) USB to S/Pdif external soundcard -> 272.

This way it keeps the signal in the digital domain up to the 272’s DAC, hence you get the best match to digital playback through the 272, without any errors creeping in from the analogue output of the laptop.

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