ASUS ZenWiFi XD4S Feature:
ASUS ZenWiFi XD4S is a WiFi 6 system with all new WiFi 6 technologies like OFDMA for improved efficiency and faster WiFi link speed. It will also benefit older Wireless AC devices since the mesh WiFi will provide a stronger WiFi coverage for your entire home. Normally, when the WiFi coverage is stronger, the speed and stability of the WiFi connection will improve even for older WiFi devices.
Performance wise, the ASUS ZenWiFi XD4S uses the Broadcom 1.5 Ghz Quad-Core CPU which is the same CPU used in the more expensive ZenWiFi XT8 that we reviewed recently. ASUS ZenWiFi XD4S is a dual-band mesh WiFi system which can support as high as 1201Mbps on the 5Ghz WiFi network. The system will use the faster 5Ghz band as the WiFi backhaul most of the time and share it with the fronthaul network.
There are only 2 Gigabit LAN/WAN ports on each unit of the ASUS ZenWiFi XD4S like most mesh WiFi systems in the market. If you need more ports, you’ll need to purchase a Gigabit switch. It’s also possible to configure the ZenWiFi XD4s into Ethernet backhaul mode or use the LAN ports on each unit to connect more devices.
ASUS ZenWiFi XD4S Spec:
| Network Standard | IEEE 802.11a IEEE 802.11b IEEE 802.11g WiFi 4 (802.11n) WiFi 5 (802.11ac) WiFi 6 (802.11ax) IPv4 IPv6 |
| Product Segment | AX1800 ultimate AX performance : 1201 Mbps+ 574 Mbps |
| Data Rate | 802.11a : up to 54 Mbps 802.11b : up to 11 Mbps 802.11g : up to 54 Mbps WiFi 4 (802.11n) : up to 300 Mbps WiFi 5 (802.11ac) : up to 867 Mbps WiFi 4 (802.11n) TurboQAM : up to 867 Mbps WiFi 6 (802.11ax) (2.4GHz) : up to 574 Mbps WiFi 6 (802.11ax) (5GHz) : up to 1201 Mbps |
| Antenna | Internal dual-band antenna x 2 |
| Transmit/Receive | MIMO technology 2.4GHz 2×2 5GHz 2×2 |
| Memory | 128 MB Flash, 256 MB RAM |
| Operating Frequency | 2.4 GHz / 5 GHz |
| Ports | RJ45 for Gigabits BaseT for WAN/LAN x 1, RJ45 for Gigabits BaseT for LAN x1 |
| Package content | ‧XD4S ‧RJ45 Ethernet cable ‧Power adapter ‧Quick start guide ‧Warranty Card ‧Screw pack |

ASUS ZenWiFi XD4S Performance
As a single router, the ASUS ZenWiFi XD4S did well with my 2 × 2 Wi-Fi 6 clients, which could connect to it at 1.2 Gbps generally. At a close range, I got the sustained copy speed of some 830 Mbps. And at 40 feet (12 m) away, the connection averaged more than 640 Mbps. These sure were better than the TP-Link Deco X60, as well as a few dual-band routers.
In Wi-Fi 5 tests, my 4 × 4 client scored some 676 Mbps at close range and almost 550 Mbps father out. Incredibly those were better than the ZenWiFi AX XT8’s. The ZenWiFi AX Mini is a system. For this reason, the performance of the node (satellite) unit is essential. And as a system sans dedicated backhaul, it was clearly behind its older cousin.
Particularly, the ASUS ZenWiFi XD4S indeed suffered from signal loss, registering the sustained speed of 390 Mbps and 309 Mbps at long and close ranges, respectively, when working with a 2 × 2 Wi-Fi 6 client.
My 3 × 3 Wi-Fi 5 client did slightly worse at 324 Mbps and 286 Mbps for long and close distances, respectively. Overall the ASUS ZenWiFi XD4S was markedly faster than the TP-Link Deco X60 and slightly outdid other dual-band satellites, including the Asus RT-AX3000.
ASUS ZenWiFi XD4S Advantage:
Whole-home Coverage
The ASUS ZenWiFi XD4S system includes three ASUS AX1800 WiFi 6 routers, featuring unique technologies that give you superfast, reliable and secure WiFi connections– inside or outside your home!
WiFi 6 True 8K Streaming
ASUS ZenWiFi XD4S puts your WiFi into top gear! With a total bandwidth of as high as of 1800 Mbps, it’s up to 1.4 X faster * than WiFi 5 routers
Flexible Network Naming
Uniquely, ZenWiFi lets you choose how you name your WiFi networks: a single name for everything, or separate names for each frequency band. The choice is yours!
Make the Internet a Safer Place for Everyone
AiProtection Classic with Parental Controls is free for life. It gives you total peace of mind, and you can keep an eye on everything that’s happening on your network via the mobile app.
Smart Looks for Smart Homes
ASUS ZenWiFi XD4S works perfectly with smart-home services– including Alexa skills and IFTTT– and is available in charcoal or white to suit your décor.
Great and space-saving Design
Comes with mounting holes and a screw pack. Hang it on the wall or place it wherever, the choice is yours!
AiMesh Technology
Easy setup. Flexible management.
Even non-experts can quickly set up AiMesh technology, while more experienced users will appreciate the comprehensive advanced networking features.
Verdict
The ASUS ZenWiFi XD4S is the most subdued AiMesh system to date, yet it handled to be the complete one by delivering all functions one might expect from a mesh of its type.

