Peavey Solo Portable on AA's

[flester]

This works off a 12 v supply or 8 'D' cells. I want to use NiMH AA cells instead which gives only 9.6v. Any downside apart from less volts and shorter life? Or do I buy rechargeable D's? I dont turn it up past 2 in practice situations and still have power supply where needed
Mainly used for mandolin

peavey_solo.pdf https://share.google/OhRkfrJeEt0YEz65p