The BPN-DE series enclosure is similar to BPU-340 as it also docks a total of four hard drives in a three 5.25-inch bay footprint. This enclosure goes a bit further though with an almost completely aluminum design with much less plastic than the BPU-340. It also touts SATA 3 support along with support for SAS hard drives. The enclosure also drops the Molex power connections in the back in favor of just SATA power inputs while the rear of the unit features a similar DIP switch to turn the hard drive LED indicators on / off and to control the fan speed.
One of the biggest differences in this model versus the BPU-340 is that this enclosure is completely trayless. This means there is no fumbling with screws or having to purchase separate drive trays for additional hard drives. You can simply insert a bare drive and it will be ready to go. Some may argue a hard drive tray helps to protect the hard drive when it is not docked, but most people will probably prefer not having to deal with the hassle and the potential added cost. Also worth mentioning is the drives can be locked by a barrel style key giving them a bit more security than the locking mechanism in the BPU-340.
The BPN-DE series hard drive enclosure sells for around $95. Of course, since there are no hard drive trays for this unit, there is no extra cost.
Let's move ahead and wrap things up with some testing and a conclusion.