Fortunately you have no sphincters in your 600 - unlike my 600v2. Actually, that didn't have a sphincter. It was more like a gateway to another dimension. I stuffed three pillows in that one. Hopefully Axiom removed them before selling it as refurbished or someone got bonus gifts. laugh

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated