this bag is pretty much the only choice to cover and carry the 5150 LBX with a minimum of safety - unless you want to look for a custom built one or try and fit the amp in some other gigbag - but both quality and design could be much better.
unlike the orange "terror" bags (that could fit as well as not, i didn't want to risk...) the fabric is floppy and wraps the head quite loosely - still clinging on the knobs and turning them every time you move the amp in or out of the bag.
there's a wide opening on the top (the bag has no handle - but a strap to carry it on the shoulder) giving very little protection from the dust.
in the end Orange bags are made A LOT better and cost more or less the same, but as i said before a terror head has different dimensione, and they could not fit well...
it does its work, but i expected something better.