Here's a link to get you started.

http://www.sfu.ca/sonic-studio/handbook/Equal_Loudness_Contours.html

Ideally, you should build your patches for the volume you will be playing at.

Cheers,

Crusty

I use the following EQ curve while building patches at low volume and then switch off the EQ when playing loud.  This EQ curve acts like a loudness button on a stereo.  I have this curve saved as a template in Line 6 Edit for use with the PODxt Live and Vetta.  Unfortunately templates and default settings for effects cannot be saved in the POD X3 Live which is a considerable limitation of the X3.

A curve like this compensates for the loss of high and low frequencies at low volume.  When you switch it off you can raise the volume to gigging level.  There is no single perfect solution as the compensation will need to vary depending on the difference in low volume levels and high volume levels.

Cheers,

Crusty

I always remember a post last year where one of the old-timers here said he carries around a $40 EQ box for giging, and plugs it in between the POD and the PA. No more having to tweak each patch separately, or make duplicate patches for bedroom and full volume. I'm not a performer but it sounded like a good idea to me.