Attaching Boss RC-50 to Sound System

[baub@baub.com]

Howdy, all, this is my first post!

Normally when my band plays I just run a mono 1/4 inch cable from the 
output of the looper 
to our sound system.  Nothing elaborate just a powered mixer head. 

But sometimes we play on bigger stages with a sound crew/PA.  Should I 
just use a 1/4" to 
XLR adapter to hook to the PA or should I use a direct box?

Thanks in advance
Baub
www.baub.com