New member, new room

Hi, everybody, In a couple of weeks I'll be finishing a rehearsal/recording room measuring 22'11"X21'12", with a ceiling sloping from 11'6" to 9'10", brick walls, concrete floor and wood ceiling. I know these are far from ideal dimensions, but I wanted to maximize space, and plan to divide the room in the future. I want to build movable broadband absorber panels, I've seen (I think) most of the designs available here, and have a few questions: * Best size/design/number for this room? * Best material for the panel's back? (MDF, pegboard, plywood, nothing, etc.) * Best size/design for bass traps? I only have 2 free corners (doors on the other 2) Thanks for everything, I discovered this Forum a week ago and already got tons of great ideas! Daniel

Any insights, please?

Too many questions? Am I not complying with the forum's rules? Please, I need help, thanks.

Aloha Daniel, Sorry for taking so long to reply. Any chance you could post a drawing of your room layout and some pics (700 pixels wide) so we can get a better idea of what you're working with, please? Thanks :wink: Aloha 8)

Hi kendale, thanks for the reply. This room will serve several purposes (hopefully): as a rehearsal (Jazz bands, not too loud) and private instruction studio, and as a mixing/production environment. Sorry about the crappy drawings! Thanks again for your help. Cheers, Daniel

Aloha, Perhaps start by flipping your mix position so that the ceiling slopes up from mix position and over behind you. More later, Aloha 8)

Hi, kendale thanks for the advice. I needed some reassurance here. I thought about that position at first, but discarded because of the window behind (I don't want to cover it with insulation, just curtains), and the fact it is not symmetrical. As you can see, the window is not totally centered on the wall (bathroom door at left), and I have a door to the right. Is this an issue? Can I fix this easily? More ideas, please! Mahalo Nui Loa, Daniel

Aloha, A question if I may- :wink: - what are the measurements of the window to the side walls? I've got some ideas on skp, but need just a little more info. Thanks! Aloha 8)

Hi, Kendale In your proposed position, there are approx. 2.30m to the right (main door), and 3.00m to the left. The window is centered between the main door and the bathroom door at the left, and it starts at 1.00m above the floor. Sorry if some of my questions sound vague or obvious, I have lots of experience as a player/arranger, but none whatsoever in design! Thanks again for your help, Daniel

More ideas? Anyone? Please?

Aloha, Been pretty hectic lately, but am drawing up a few ideas. Will post as able. Aloha 8)

Aloha,

I wanted to maximize space, and plan to divide the room in the future. I want to build movable broadband absorber panels

Given this info, here are a few ideas - DIY Wall units - http://www.johnlsayers.com/HR/index1.htm - side wall slot absorbers to the left & right of mix position, angled 12 degrees in toward front of mix position - rear absorber type panels rear half of room, front center & soffit areas - floor to ceiling corner absorbers/traps (you can also place corner traps at the ceiling wall junctions if more bass absorption is needed) - you may want to haga a cloud absorber over the mix position as well Here are a few notes I've collected along the way that might be helpful: • It is better to start with a longer front to back dimension than the side to side dimension because you don't want rear reflections to interfere • Soffits angled 30 deg. in from a flat wall result in speaker baffles being perpendicular to the two legs of equilateral triangle comprised of two speaker centers and a point about 10" behind your head • The baffle extension (the face of the soffit) should be as large as you can make it, up to about 45" in each direction from the woofer in a system with a LF cutoff of around 45 Hz - There's a formula based on LF cutoff that ensures full 2 pi response for the woofer if the baffle is at least the size obtained in the formula's solution - • Distance to wall behind speakers will change response drastically - there is a wall bounce calculator on the Acoustics forum that's fun to play with (needs Excel) • Moving either speakers or your head by as little as an inch or two can sometimes make drastic changes in response, due to modal peaks and dips. • Left/right room symmetry (at least within a foot or two of ear height) is important for good stereo imaging. • Roughly 38% of total room length from the front wall • Equilateral triangle formed by left, right mix position • Monitors should NOT sit on the console but behind, placed on heavy decoupled stands - console placement causes early reflection problems in most cases, unless the console is slanted down in front a LOT. • Monitor angles 60 degrees • Monitor height – tweeter at ear level (avoid mid point of floor to ceiling measurement – either sit higher or lower if necessary) If you want to mount them high you must angle them down so that they point at the engineer. • Angled side absorption panels – left/right of mix position • Side walls 6-12 degrees • Ceiling 12 degree slope Hope this helps, Aloha 8)

Hi, Kendale, thanks a lot for your ideas, but I can't see the 2 doors and the window in your design, am I missing something? Cheers, Daniel

Aloha, This was just an idea for the mix position in reference to the stated

movable broadband absorber panels

If you are interested in a design dividing up the entire room at present, I can post a few ideas as well. Let me know. :wink: Aloha 8)