M8493 Power Mac G4 QuickSilver – Front Control Panel – Speaker Shield $5.00 Apple M8493 Power Mac G4 QuickSilver - Front Control Panel - Speaker Shield quantity Add to cart Add to Quote Continue Shopping Category: M8493 Power Mac G4 Quicksilver Description Shield / housing for the front panel control board / power switch and speaker on the Power Mac G4 QuickSilver models. Apple, 805-3094, 805-3094-A