The PC-B25FB looks quite spacy. While there are only straight and edgy design aspects to the chassis itself, Lian Li has chosen to add a blue ring on the front which lights up when the chassis is turned on. So you have the conflict between straight lines and a perfect circle. I for one really like the edgy look, but am no fan of the huge ring of light. Luckily tastes are different.
Taking a quick look at the exterior, as you can see, the entire chassis including the front is constructed of aluminum. Turning the B25FB around, we have nothing out of the ordinary either. The placement of all the components is the same as most other Lian Li cases of this price class. There are no openings on either side panels, thus there is no way for any noise to escape through these parts.
Let us focus on the front, the afore mentioned ring is basically an opening in the front, which is indirectly lit by LEDs behind a blue cover. On top we have three 5.25 inch drive bays. One of them holds a 3.5 to 5.25 inch frame, so that you may also install such a part into the front drive bay.
You will find the PSU bay of the case all the way on the bottom. This is nothing out of the ordinary for modern cases and Lian Li is using this layout on the majority of their enclosures. In the middle are eight expansion slot. That is one extra slot - perfect for quad GPU setups or those wanting to fill the case to the rim with different expansion cards, but also would like to use the bottom bracket to route USB or Firewire connectors from the board to the rear of the chassis. One noteworthy aspect are the air vents of each expansion bay cover. CaseKing does not supply dampening material for these, so even if you place all the different supplied sound insulation materials everywhere, noise can still freely escape here. You will also find one of the five fans in the rear of the chassis. This one is 120 mm large and pushes air out the back of the B25FB. To cover this opening with an insulation material, you will have to remove the fan. This will leave a circular opening of the mat unprotected, with the sticky surface facing outward. It would have been good if CaseKing supplied something to cover this area up.
While the chassis is all aluminum, the top front part is made of plastic. This is not obvious when just quickly glancing at the chassis and Lian Li has managed to minimize the amount of this material required, so that this is by no means a negative aspect. On top you will find two 140 mm units blowing air out the top of the chassis.
Since the power supply has to be installed on the bottom, there is an opening with a dust cover to allow fresh air to enter the chassis to the PSU.