My Celestion S8 has an 8" sub which doesn't go low at all! The box is fairly small and has twin portd underneath, bigger than a BK but the actual effective volume is small as there is a panel of wood inside the box that separates the amp. I have come to two conclusions. One is to replace the sub driver for a deep Car sub (kicker) which are a good brand. THe other is to ruin the insides of the box and take away this panel as to increase the box volume. WIll removing this divider piece of wood to increase the volume of the box make the bass deeper and is it dangerous to take it out due to the amp??