Chieftec DX-01BLD in the test: Insulation for the CS-601 ex works
Many PC owners longingly think back to the old days when the working noise of a floppy drive was perceived as annoying because the rest of the computer was practically silent . Today the situation is different. Thanks to the enormous power dissipation in processors and graphics cards, more and more fans are being stuffed into the housing and the hard drives, with their 7200 rpm, also contribute to the annoying noise pollution. Apart from water cooling, the only thing that helps is the use of insulation and quiet components, as we want to show using the fully insulated CS-601 from Listan.
Scope of delivery
The insulated CS-601 is coming in the usual brown cardboard box, but the quite heavy weight is immediately noticeable. After removing the styrofoam cushions and the protective plastic bag, the blue splendor in this case stands before us. A self-adhesive film is also attached to the cover of the housing, which provides a little extra protection. When placing it on the table, the typical sound of metal housings is missing - the housing is practically silent.
The functionality corresponds to that of the normal CS-601 housing, only that all parts come withdifferent insulation materials are provided. Listan uses the 'be quiet' insulation mats, which are also available individually and consist of three different materials:
- Insulation cardboard (bitum board) 1.4mm with PU foam 8mm diamond embossing
- PU foam mat with PUGM skin (20mm)
- Insulation cardboard with anti-drumming layer (bitum) 2.4mm
The links above refer to the technical information of the insulation materials such as the base material, thermal conductivity and airborne sound insulation. To show how effective the insulation is, Listan has commissioned a test laboratory to measure the noise emissions. The result is available in the form of two * .pdf files. On the one hand the documentation about the measuring points , on the other hand the structure-borne noise tables .
The front door is just as insulated as the individual 5.25 'and 3.5' drive covers. If you do not use a floppy drive or another external 3.5 'drive, you can seal the second 3.5' drive cover with a small, loosely enclosed insulating mat. In the delivery condition, apart from the fan in the side door, which works almost inaudibly quietly, every fan opening is closed with insulating mats. The fan grille integrated in the side door also serves as a certain dust protection. However, the insulation inserts in front of the ventilation openings can easily be removed. On the front, however, the entire front panel must be dismantled because the insulating mats are inserted between the panel and the housing. On the back, these can simply be pulled out to reveal the opening. The typical snap-in holders for the case fan are loosely enclosed with the case and only need to be clipped in.
The housing has the usual dimensions of approx. 473x205x522 mm (LxWxH). However, at around 13.1 kg, the weight is over 2 kg higher than its uninsulated counterpart. The hard drive cages can be removed individually and drive rails are included for the 5.25 'drives, which make assembly and disassembly of the drives much easier. The slot brackets for the plug-in cards on the back of the housing are all screwed on and can be reused as often as required the case was built in our test system and the ATX connection panel had to be replaced. The existing panel resisted these attempts quite properly, but ultimately had to give in to the increased effort of the tester. The quality speaks that neither the panel nor the housing In addition, a sign of high accuracy of fit. There were no problems with the installation of the test system, only when installing the plug-in cards you have to maneuver them a little past the insulation on the back, which is not a real problem.
On the next page : Test results