How can I make my Guitar sound perfect with no rattling or loose strings?

technique: hold the string as close to the fret as you can, strum/pick it close to the hole in the body, don't hold it down weakly, position your arms well making sure there is a gap between your fretting hand and the guitar when holding the neck to let you move your fingers freely without touching any other strings, and try to avoid resting your strumming hand anywhere on the guitar. build of guitar: Loose strings? get good ones and make sure they are secure at the peg and wound up nice and neat at the headstock, sometimes paying more for guitar and supplies means better quality. For lower tuning to avoid rattling use different gauged strings, asking a good music store's guitar department should provide you with the right advice the staff usually have to be experienced guitar players in order to give out info

If you're down tuning and the strings are too loose you need heavier gauge strings. Also depending on how low you might need to adjust the truss rod. I recommend having the guitar professionally set up since you don't seem to have any idea what you're doing. If you're starting a studio though you should know these things. Do you have even the slightest clue what you're doing?

You might want to try these strings and have your guitar set up with them. Should cost about $25 to have the guitar set up for the new gauge strings and about $6 for the strings. http://www.music123.com/Ernie-Ball-2626-Nickel-Not-Even-Slinky-Drop-Tune-Strings-100870-i1122403.Music123

Ishred, you need to talk to some guitar experts. Message guitarman3000 on http://www.audioneeds.com

Try a higher action?

all of the above

If you're having "rattling" it's most likely fret-buzz and you can adjust the rod or the saddles to raise the action. Also, use a heavier string and you will get a far superior tone in lower tunings. Maybe try some hybrids, like 9's or 10's on the three smaller strings, and 11's or 13's on the lower three. If you're going to anything bigger than 10's you'll need to re-adjust the intonation of your guitar to account for that. If you don't know how to do that you can either use google and find guides or take it in and have it done. It's not expensive, but I recommend doing it yourself because you really get to know your instrument in the process. Good luck and e-mail me if you have any further questions. \m/(-_-)\m/

All of the above. My 2¢: take your instrument to a repair guy & get it set up properly. What's more if you're loosening up the strings sufficiently to hit a low B, and the strings are thick enough to accomodate the particular heavy sound that's "in" now, the rattling may be unavoidable. Understand a repair guy may be able to cut a lot of that rattling out, but not all. What's more, the musician in question that's using the instrument may be quite likely sloppy on technique. So even though you've done all on your side of things to make things sound clean, if someone comes in & plays with no precision in his/her attack, you're gonna get the rattles.

You want to drop the tuning of a string as much as 2 and a half steps from what it is designed to be, then complain when the string rattles on the frets? And people wonder why guitar repairmen have that slightly crazed look in their eyes <grin> There is no easy answer. There are some good suggestions in the preceding answers. One I will definitely second for several reasons is to take this guitar to the best repairman in town and get a full setup done on it. Choose the strings you need to use, get the action adjusted properly, get the frets checked and leveled if needed, do whatever is necessary to get this guitar playing as well as possible.