Mesh vs WiFi extender vs powerline: which fixes a dead zone?
Three ways to cover a house, with the speed each one really keeps. Why repeaters halve throughput, and when one Ethernet cable beats any of them.
A dead zone is a coverage problem, and coverage is solved by adding a radio closer to the problem — not by buying a stronger one further away. There are three practical ways to do that, and they are not equal.
The honest comparison
| WiFi extender / repeater | Powerline kit | Mesh system | |
|---|---|---|---|
| Typical cost (2 units) | RM60–150 | RM120–250 | RM300–1,200 |
| Speed kept in the far room | ~50% of the source | 20–70%, wiring dependent | 60–90% (dedicated backhaul: ~95%) |
| Latency added | +5–20 ms | +5–15 ms | +2–10 ms |
| Roaming between rooms | Poor, manual | Poor | Seamless handoff |
| Setup | 5 minutes | 5 minutes | 15–30 minutes |
| Best for | One room, one device, lowest budget | Brick house, no cable path, low demands | Whole house, many devices |
Why extenders halve your speed
A repeater is one radio doing two jobs on the same channel: it receives a packet from the router, then retransmits it to your phone. The air is shared, so every megabyte crosses it twice. On a 300 Mbps WiFi link you will often measure 120–150 Mbps behind the repeater, and the extender also drags down the main network because it occupies airtime.
The other failure is stickiness: your phone keeps holding the weak router signal until it dies, then jumps to the extender, then holds that too long when you walk back. Calls break at exactly the moment you move.
Repeaters are not useless — for a single printer, a CCTV camera, or a spare room, RM80 is a fair price. They are the wrong tool for a whole house.
Powerline: a lottery on your wiring
Powerline adapters push data over the electrical circuit. In the same circuit, in a house built in the last 20 years, on the same phase, they can deliver 100–300 Mbps. Across circuits, through an extension lead with a surge protector, or through an old fuse board, they can drop to 20 Mbps — sometimes lower than the WiFi they were meant to replace.
They have one genuine advantage: the signal follows the wiring, so a brick wall or a concrete slab does not matter. If you cannot run a cable and mesh is out of budget, they are worth a test — but buy somewhere with a return window, and measure on day one, not day thirty.
One more thing: powerline adapters are usually slower than a decent mesh with a wireless backhaul in the same room, and much slower than any cable.
Mesh: the right answer for most houses, if you buy it correctly
Mesh is several access points that share one network name and hand devices between themselves. Two details decide whether it is good or mediocre:
Backhaul. If nodes talk to each other over WiFi on the same radio they serve clients with, you get closer to extender behaviour. Tri-band mesh uses one band exclusively for backhaul — better. A cable between nodes is best of all, and any mesh system with an Ethernet port can use it.
Placement. Nodes go halfway between the router and the dead room, not in the dead room. A node standing in the dead zone receives a weak signal and faithfully rebroadcasts a weak signal. Everyone makes this mistake at least once, because the dead room is where the problem is visible.
The decision tree
- One room weak, one device, tight budget → extender.
- Brick house, no way to run cable, modest needs → powerline (with a return window).
- Whole house, family, video calls, gaming → mesh, wired backhaul if at all possible.
- Any of the above, and you can reach the far end with one LAN cable → a cable plus a cheap access point beats every wireless option for the same money.
Before buying anything, move the router once — placement fixes more dead zones than hardware does. And if the far room is slow but the near room is also slow, you have a line problem, not a coverage problem: check the evening congestion test.