To gain access to the interior, simply remove the thumb screws holding each panel in place. The actual removal off the panels requires a bit more force due to the thick sound insulation material, which has been placed perfectly to cover the greatest possible area of each panel. The interior itself is quite simple but - as always with Lian Li - very effective. You will not find SATA backplates or hard drive trays inside the PC-B25FB anywhere. Turning the case around, we can clearly see a large opening below the CPU area of the mainboard with an additonal hole on the left area.
About two thirds of the front is taken by eight hard drive bays. This is well above average and perfect for those running raid arrays or a home server with multiple drives. Even so, you still have enough space to place up to three external drives into the PC-B25FB. Two of these bays feature the locking bars - another Lian Li exclusive feature.
Turning our focus over to the rear of the case, the PSU bay is lined with foam, to kill any vibrations. As you can see, the KingMod insulation material also covers the bottom of the chassis, but not the air vent of the PSU. Lian Li also offers the option to install the unit with the fan facing upward in which scenario one could go ahead and cover that bottom vent as well, but there is no additional material present to do so. The eight expansion bay covers are held in place by the excellent locking mechanism we have seen in most of modern enclosures from the company as well as some Lancool cases. The rear fan is covered by the same old aluminum grill we have seen in most of the Lian Li cases in the last three years.
You may also pull the entire front of the chassis with a firm tug. The two 120 mm fans are covered with dust filters as well. Taking a close look at the ceiling, we can clearly see the two 140 mm units blowing air out.