Review on QNAP TL D1600S Enclosure PCIe Interface QXP 1600ES by Bill Lacy

The variable speed main fans work well (you can't hear them) but there is a tiny non-adjustable fan in the PSU that makes this unit completely unusable in all conditions. an enclosed space where you want to work comfortably. The specification of 24 dB is a lie. The actually measured noise level is 44 dB with an uncomfortably high tone.