We've just tested 3 models of HDMI multi-viewer, QV401K, QV801 and MV801.
QV401K: 4 inputs 1 output, HDMI 1.4V, input / output max. 4k 60hz. Chipset made-in-US
QV801: 8 inputs, 1 output, HDMI 1.4V, input up to 1080p, output up to 4k 30hz. Chipset made-in-US (QV901 and QV1601 are applied the same chipset)
MV801: 8 inputs, 1 output, HDMI 1.4V, input up to 1080p, output up to 4k 30hz. Chipset made-in-China
1. 4x1 quad viewer: QV401K vs QV801 vs MV801
Input PC: V401K optimized algorithm automatically adjusts the screen to full and determine the best PC resolution. Text from PC is clear enough to read easily.
MV801:
It's output resolution can be scaled to 4k 30hz but the actual picture quality cannot reach UHD. For certain, it does not suitable for PC. Text from PC is blurry and unreadable.
2. 8x1 mode of QV801 vs MV801:
3. 1x2 mode: QV801 vs MV801
4. 1x1 mode: QV801 vs MV801
