AC/DC sound

I play in a AC/DC tribute band, other people says that we have a great singer, but we need to improve guitars ' sound.
We (me and the other guitarist) have tried a lot but without important results, so I try to ask you some suggestions (amp regolations, effects, etc.).
I'm the rhythmic guitarist and I have a Stratocaster, with Marshall
30th anniversary amp, and a boss GT3 (I know that with a Strato is impossible to recreate the sound of a Gretch, but this is the guitar I have!).
The lead guitarist has a Gibson SG, with Marshall JCM900 head and
Marshall 1960, and a Zoom.
If you want to know our sound nowadays, you can download our demo on www.hardballs.it, on the download section.
Thank you very much!

Remove the balls to write me!

Opinion here...Sounds to me like you need to clean up your mix.There is no separation.One of the key sounds to ac/dc is not so much Angus,but the pocket.That r&b kick drum and and bass needs to be there,together.You could take any ac/dc cut out there and listen to it on a transistor radio and still hear the kick and bass..That is a key sound for them.Next You need to clean up the guitars.Not the saturation but the execution of the riffs.M.Young is a very precise player.A. Young on the other hand has free reign over the tunes.Everyone has a part and the sum of those parts makes the whole.Do some more homework on the guitar parts,and work on the pocket..I guess from what I heard on the mp3's it isn't what your playing,it is more like what you shouldn't be playing.Give the tunes some air. Good Luck and have fun.

Like the others said, get rid of the effects stuff.
Then don't turn up too much gain (keep it crunchy) or the amp will compress the sound too much.
Use thick strings, 0.10 or better 0.11.
Finally and very important, hit the strings as hard as you can. It's an important part of the AC/DC sound.

Hey, not bad at all guys! Your singer does a great job of covering the vocal, although the high parts get him sounding a bit thin--that's ok though.

The guitars sound too "good" distortion-wise for AC/DC. You've got that
1980's "processed" sound thing going...get rid of the effects and just plug into the amps...minimal effects, save for reverb and maybe some delay at the board.

Your lead player is making some of the licks too hard..."Back in Black" has a relatively simple opening lick, and your guy plays too many notes. In
"For those about to Rock" he doesn't quite play the fills in the beginning correctly. You guys also need to loosen up a bit--you're playing very rigidly. AC/DC's songs, like a good blues song, is supposed to have a lot of "holes" in the music. It's supposed to sound raw and imperfect.

Your rhythm guitar sounds great--if you can get one I'd replace the bridge pickup with a "Hot Rails" type pickup--it will give you a more fat vintage
Gibson-y sound without messing up the pickguard. You won't run into the problem of the strat sounding thin.

I'd also like to hear a bit more rhythm section in the music--the drum and bass are a bit muted for my taste.

All in all a good sound though...I give you 8 out of 10 stars...one of the best AC/DC tribute bands I've heard in awhile.