Dtech Splitter, HDMI, 8 Port, 4K @30HZ – 7148B

The Dtech DT-7148B (listed here as 7148B) feeds one HDMI source to eight displays from a single flat case, 225 x 63 x 15 mm and 340 g. It carries 4K at up to 30 Hz with 3D and CEC, and runs from a 5 V 2 A adapter. Plan around the input lead first: Dtech rates it for only 5 m, against 10 m for each of the eight outputs.

Placing the splitter: 5 m in, 10 m out

Both distances assume 26AWG HDMI cable. Put the 7148B beside the source, in the same cabinet or under the same desk, and spend the longer cable runs on the screen side. A display more than 10 m from the splitter needs an HDMI extender on its output.

All ten connections share one long edge. HDMI IN sits in the middle, outputs 5 to 8 run to its left with the DC 5V socket at the far end, and outputs 1 to 4 run to its right, so nine HDMI leads and the power lead leave from the same side. The rated input is 5 V 2 A, and the supplier notes for this model ask for the adapter delivered with it rather than a substitute.

4K at 30 Hz on all eight outputs

Dtech’s 340 MHz rating works out to 10.2 Gbps across HDMI’s three data channels, the bandwidth HDMI Licensing lists for 4K at 30 Hz. Eight TVs running the same advert, price list or presentation fit within that. A 4K computer desktop or a game at 30 Hz updates half as often as on a 60 Hz monitor, so for interactive content run the source at 1080p 60 Hz, or look at the four-output Dtech DT-7214, rated for 4K at 60 Hz.

HDCP and screens of different resolutions

No HDCP version appears in Dtech’s 7148B material, and HDCP 2.2 is not claimed, so treat protected 4K from a streaming player as unproven through this unit. Protected 1080p content is not restricted to HDCP 2.2 links.

The sheet also does not describe EDID handling and lists no scaler. All eight outputs carry the one format the source sends, whatever each screen can show.

Key specifications of the Dtech DT-7148B