One Stomp to boost gain and volume?

[zz666]

Boost in the loop will add headroom, not saturation.
Boost out front will add saturation, not headroom.
GE-7 and SD-1, put them next to each other, stand on both, job done.

 

[moltenmetalburn]

Boost in the loop will add headroom, not saturation.
Boost out front will add saturation, not headroom.
GE-7 and SD-1, put them next to each other, stand on both, job done.

"Add headroom?" Impossible. Boost volume yes, as you boost that volume you lose headroom.