is there a difference between stacking AA batteries and using a 9V?  I tried out a bunch of different power supplies with my acoustic 360 clone/mod and nothing beats a 9v battery as far as noise is concerned.  the only prob is it doesnt last very long.  I was thinking about making a battery pack stacking 8 AA rechargable batteries as you can get those up to 2200 mAh where the rechargable 9v are only like 200 some mAh.  is there a difference in noise or anything else from stacking multiple cells?  is this feasable?

You can do it for sure, why not? You'll even get longer life out of them too

Absolutely feasable. Go for it!

ZVex actually recommends just that for a supply when building.

The only thing that changes is the impedance which goes down. For almost all circuits this won't make a difference and where it does, it will probably help more than hurt.

Take care,
-Peter

Alarm batteries, about the size of a brick...they put out between 11v and 14v...I have also a regulator, LM317, [~3$ + 10 minutes] but it went on the EZ vibe.
 All my caps are 16v or better...I throw the scavved 10v ones out..
 These alarm batteries weigh alot and last 'forever' ... 6 months or better between charges...get your alarm changed to save money and you get the old battery free...I have two...lol...I don't know how these alarm companies do it...get the old contract that produced all the hardware [battery ETC.] nulled...in place of the their new contract...I like these batteries just the same...