Corrections lang mga ser. MDF is more expensive than Particle Boards. MDF na 3/4 is 680 pesos na 4'x8', while the 3/4 particle board is about 500 pesos. Actually, mas recommended ang MDF kesa sa Particle Board for sub boxes kasi mas siksik ang MDF. Meron ding HDF pero masyado na mahal.
You don't want to use Particle Board especially if yr sub is an S12L7 and a 2000 watt amp, blown box!!!.....hehehe
Just my 2 cents, po!