Please help with soundpanels!!

Hey guys I'm going to be building and installing the soundpanels for my studio,(2'x4'x4" panels with OC 703 or 705) here is a pic from google sketchup... The 3 walls with the desk,couch,and drums are all block and the other wall on the right is drywall with 2 doors in it, one 4' from one corner and the other 36" from the other corner. The ceiling is 2x2 acoustical ceiling with 6" insulation above. The floor is concrete that I stained. I'm using area rugs on the floor for more or less coverage depending on the situation. My questions are: 1. How much bass trapping do I actually need in a room this size? All 4 corners top to bottom? 2. As for in between the corners will the example in the pic work? And how far apart should I space them? I know I need panels behind the desk and drums, just didn't want to go through the trouble of putting them in the pic (was learning how to use the program as I was doing this). 3. Should I make them all using 4" 705 or should I use a combination of 2" and 4"? 703 and 705? 4. Should I cover the doors? Solid core doors...heavy as fuck. 1 panel on each door or cover them completely? 5. How far away from the wall should the desk be? I really have no way to mount them temporarily, esp. in the block walls so I would like to get it damn close to right the 1st time. I was also thinking about a big shelf for storage maybe above the desk or the drums, not sure just yet.

unsound wrote:

1. How much bass trapping do I actually need in a room this size? All 4 corners top to bottom?

As much as possible. More than just the four wall-wall corners. I'd have traps in wall-floor corners too where possible. There are also corners where your walls meet the ceiling.

3. Should I make them all using 4" 705 or should I use a combination of 2" and 4"? 703 and 705?

Four inches thick is best. 703 works well, but 705 is nicer to cut and handle though it's twice as expensive.

4. Should I cover the doors?

Only if they're in corners or at reflection points.

5. How far away from the wall should the desk be?

The only way to know for sure is to measure the room's LF response at high resolution while you move things around. See this: How to set up a room --Ethan

Ethan.......thanks for the response, it is much appreciated. Here are some pics of my room, kind of a mess but still a work in progress. ...... ...... ..... like I said it's still a work in progress.....I'm getting my 703 tomorrow if you have any more input after seeing the pics.................please do. -scott

What's above the ceiling tiles? Your best bet is to fill the entire cavity above with fluffy insulation. That will give a lot of bass trapping that costs very little and takes no effort to make look good because it's hidden. --Ethan

Hey Ethan......there is 6" insulation above the ceiling, would you suggest more? and also I think I've ask this before but besides covering the reflective areas for listening purposes, should I put some panel behind the drums and the 24' wall such as the futon wall or wall with the doors?

unsound wrote:

there is 6" insulation above the ceiling, would you suggest more?

It depends on how much space there is above the tiles. I'm sure more insulation will help regardless. How much space is there?

should I put some panel behind the drums and the 24' wall such as the futon wall or wall with the doors?

Hard to say without being there, but probably. Why don't you just try it? --Ethan

Ethan thanks for all your input I really appreciate it man! Gonna try some things out and see what works best........thanks again. -scott