Allen & Heath SQ5 Rack Ears These steel rack ears are designed specially to fit the Allen & Heath mixer into the 1SKB-R100 or the 1SKB19-R1208 GigRig. The rack ears will allow the mixer to sit lower into the case, which enables the user to mount an optional 1SKB-AV8 for the 1SKB-R100 or 1SKB19-R1208 and still fit the lid on without bumping the top of the mixer. The rack ears come with screws and washers for easy mounting.