Garage Listing room

Without modification it's probably going to be a fairly dead sounding space due to all the exposed insulation. Are you willing to do modifications or would you need to use the space as-is? 

In other words you're one of those people you specifically warn about.

Millercarbon, you truly have issues. Settle down before you look even more foolish.

Same here @bkeske 

You state the facts.

@millercarbon "See above- actually brags about following codes!"

speaking of doing some research why don't you look up the Beverly Hills Supper Club fire in Highland Heights, Kentucky back in the 70's before the state of Kentucky had dedicated building codes and loosely followed the BOCA code if you would like to see what an egregious comment you just made. Disgusting!! Any architect bragging about following building codes is the architect I will have in my practice. My license and any other architects' license is given for the life, safety and welfare of all occupants of that building for as long as that building stands. Not how well you pick colors. You had drywall installed. Now shut up and let the professionals speak. Pissing contest? Piss off! 

@hiend2 "Going to bring in a set of speakers and amps and listen to someting fimilair, the room the system is in now are almost the same dimensions, will report" there you go. Listen and see what you have.

Since you will still be using the space as your garage and/or shop you may consider putting some drywall at selected locations on the walls to help reduce the amount of absorption in the space. Less about isolation and more about room acoustics and reducing the amount of absorption. I would normally suggests just using plywood on the walls in a space like that so you could use it to hang shop/garage items but sheetgood products like plywood and particleboard are still very high cost relative to last year. Drywall is more expensive as well but nothing like plywood. If you have a shop I'm guessing your relatively handy and you can hang the drywall yourself. Don't need to finish it if looks aren't a concern but this will help reduce absorption in the space. Best of luck!