Cellar Studio Acoustics

[vls]

Hi!

In my small cellar homestudio (336cm width x 386cm height, ca. 40% of the wall: 4cm-thick-foam for high freq absorbtion, on the whole left is a cabinet (Schrank).

Monitors: Adam P22A + Adam Sub12

A very bad drawing: ;-)


Frequency Plot: (1hz steps)


Handycam Image:


So, the room sounds ok, but between 100 and 140 hz, there are heavy dips! How can I flatten this range? (I know, if I'd know that i would use the room for over 3 years, i would use realtraps, but at the moment, i need a budget solution - auralex / self made`?) The sub bass range seems to be ok, perhaps a little bit boomy / "reverberant" (not that tight), but this is not the main problem.

How can i treat this room so that i can produce in decent acoustics?

Thanks,

Volker

[Glenn Kuras]

Sound like to me you need some bass trapping. For that you could use a few different things.

1) 703, 705 or mineral wool panels that you would straddle the corners with.
2) Buy some fluffy fiberglass and stack in all corners of the room
3) Buy some bass traps.

Any way you go you would want to start with all open corners of the room. I would recommend going floor to ceiling in front and back corners first. If the problem is still there then you can start to straddle ceiling to wall and or floor to wall corners. Also take a look at our FAQ (on my sig at the bottom) to help out.


Hope that helps get you started.

Glenn

[Ethan Winer]

Volker,

One big problem I see is less than ideal speaker / listener positions. As it is now you're close to the center of the room front to back, and the bass response is never good there. Here's an article on my company's site that explains how to set up a room:

www.realtraps.com/art_room-setup.htm

We have many other related articles I'm sure you'll find useful. Look here:

www.realtraps.com/articles.htm

> between 100 and 140 hz, there are heavy dips! How can I flatten this range? <

Bass traps.

> i would use realtraps, but at the moment, i need a budget solution - auralex / self made`?) <

"Self-made" panels will be much more effective than most of the foam products you can buy. My Acoustics FAQ has a ton of such DIY information:

www.ethanwiner.com/acoustics.html

> How can i treat this room so that i can produce in decent acoustics? <

Between the advice on the RealTraps site (also see the "How To" section) and my FAQ, you'll find everything you need. Note that the articles and videos on the RealTraps site apply generally, not just to our own products.

--Ethan

[vls]

Hi!

Thanks for the answers I think I'll build four movable bass traps on stands (1,5 meter height / 1 meter width) diagonally in the corner, would that help? [the traps need to be movable because of the wall-cabinet (Wandschrank) doors on the left, this is also the reason why I can't place the both left bass traps in the real room corner (because there is the cabinet).

@Ethan: I made the Tests with your test tone cd and a radio shack SPL meter clone.

My listening position is @38% of the room length (from the back), I thought that was the best position?

Thanks,

Volker

PS: I hope you can understand my english

[u b k]

that foam on the walls is makin' me nervous. my guess is you're killing too much high frequency and not doing anything to control low end bloom.

you gotta do the opposite: minimum hf absorption, maximum bass trapping. if you can add in lots of mid and hi diffusion you'll be in great shape.


gregoire
del
ubk
.

[Glenn Kuras]

Originally Posted by vls

Hi!

Thanks for the answers I think I'll build four movable bass traps on stands (1,5 meter height / 1 meter width) diagonally in the corner, would that help? [the traps need to be movable because of the wall-cabinet (Wandschrank) doors on the left, this is also the reason why I can't place the both left bass traps in the real room corner (because there is the cabinet).

@Ethan: I made the Tests with your test tone cd and a radio shack SPL meter clone.

My listening position is @38% of the room length (from the back), I thought that was the best position?

Thanks,

Volker

PS: I hope you can understand my english

38% from the back wall is not the worst spot, but it is always better to be 38% from the front wall.

Glenn

[Glenn Kuras]

Originally Posted by u b i k

that foam on the walls is makin' me nervous. my guess is you're killing too much high frequency and not doing anything to control low end bloom.

you gotta do the opposite: minimum hf absorption, maximum bass trapping. if you can add in lots of mid and hi diffusion you'll be in great shape.


gregoire
del
ubk
.

ditto.

[vls]

Originally Posted by myfipie

38% from the back wall is not the worst spot, but it is always better to be 38% from the front wall.

Glenn

Hi!

I will make better plans/photos the next days. Perhaps I'll remove some of the high-absorbers (i'll see it the next days). On 38% from the front wall, the bass was worse and not as flat as 38% from the back. additionally, there was some kind of "ringing".

Volker

[Glenn Kuras]

Well keep us posted and we can see what we can come up with.

Glenn