Tech specs
As you would expect, for $280 -- really, a disgusting amount of money for a wireless router -- you do get some utterly insane tech specs. There are four antennas, connected to a 4x4 Marvel Avastar 88W8864 chipset that's capable of pushing up to three 80MHz 802.11ac spatial streams over the 5GHz band, for a total 802.11ac throughput of 1300Mbps, or 1.3Gbps. (For more info on how 802.11ac works, read our explainer.) The router is fully backwards compatible with previous 802.11 standards, and is capable of four-stream 802.11n (600Mbps) over the 2.4GHz band. Now you know why it's called the 1900AC -- 1300Mbps + 600Mbps = 1900Mbps (though I don't think the router is actually capable of maxing out both the 5GHz and 2.4GHz networks simultaneously).
There's also a four-port gigabit ethernet switch on the back of the WRT1900AC, a single Gig-E WAN port (for your modem), a USB 3.0 port, and a combo USB 2.0/eSATA port. FAT, NTFS, and HFS+ file systems are supported on external storage. As part of the Marvel chip, there's a dual-core Cortex-A9 CPU clocked at 1.2GHz. There's also 256MB of DDR3 RAM. The WRT1900AC is a beast. (It's by far the heaviest consumer WiFi router I've ever held, incidentally, due to a rather massive heat sink that's necessitated by the over-the-top hardware.)
Setup
Setting up the WRT1900AC is very easy. Unlike other routers that I've set up in the past, where you might have to do some manual IP address configuration, the WRT1900AC is managed by visiting a website, https://linksyssmartwifi.com. When you first plug the WRT1900AC into your modem (or some other network with internet connectivity), it seemingly phones home and tells Linksys your internet IP address. Then, when you visit linksyssmartwifi.com, I assume some magical combo of UPnP (or maybe just redirection) takes you to your router's config panel. It's pretty slick.
Linksys Smart Wi-Fi Setup complete
The setup process requires you to create an account, which is used to log into the router -- but because you access the router through a normal website, you can administer it from your smartphone, the office, or indeed any internet-connected device. The setup process also checks for updated firmware, and runs you through the usual wireless network configuration. Because the router is backwards compatible with every other 802.11 technology (b, g, n), you have the option of setting up a 2.4GHz network, a 5GHz (802.11ac) network, or both. It's all very easy to set up.
Performance
Ultimately, if you spend $280 on being an 802.11ac early adopter, you're really only doing it for one reason: You're giddy at the thought of a wireless network that's capable of ethernet-like transfer speeds. Well, let me just begin this section by saying, yes, 802.11ac really is fast -- but, as you would expect, despite a theoretical max speed of 1300Mbps, you won't ever get close to that. In reality, you probably won't even break the gigabit-per-second barrier -- but still, compared to the usual 100-150Mbps that you'd usually get with 802.11n, we're still talking about a massive performance boost.
Linksys WRT1900AC performance
In real-world testing, average throughput for large files (installation files, TV shows, movies) was around 400 megabits per second (or 50 megabytes per second). That's with the router upstairs and my laptop (a late-2013 MacBook Pro with Retina display) downstairs. I occasionally saw bursts of 500 or 600Mbps. Sitting upstairs, within a few feet of the router, 450-500Mbps was just about sustainable.
Linksys tells me that the WRT1900AC with a late-2013 MacBook Pro should be capable of three 802.11ac 80MHz 433Mbps streams, for a total of 1299Mbps -- but that drops down to "between 700 and 800Mbps when TCP network overhead is accounted for."
I'm not sure why I was limited to around 50MB/sec (400Mbps). I tried copying files from both my NAS (connected to the WRT1900AC via wired Gig-E), and from a USB 3.0 flash drive plugged straight into the router -- both of which I have previously tested at speeds of over 70MB/sec (~600Mbps). There are no other 5GHz networks in my area, so it probably isn't interference. Other reviewers have managed transfer speeds of 80MB/sec using the WRT1900AC, so it is theoretically possible to hit 700Mbps or more. Linksys says it could be because I'm in Europe, where the number of channels and output power is restricted.
The wired side of the WRT1900AC works exactly as advertised: I saw full gigabit ethernet speeds when copying data from my NAS, and from the directly attached USB 3.0 flash drive.
Next page: Other cool features, and should you buy it?Other cool things
Beyond being very fast and easy to set up, the Linksys WRT1900AC has a few other neat features that I'd like to call out.
Network Map (below) shows you exactly what's connected to your router, both wirelessly and via the four Gigabit Ethernet ports. This is very handy for spotting freeloaders. You can then click Internet Usage in the top right corner to see how much bandwidth each device is using -- and if you click on one of the devices you can see more info about the device, or access parental controls if you're a parent who wants to control their kids.
Linksys WRT1900AC network map
The WRT1900AC's external/networked storage features are pretty cool, too. By plugging some external storage into the USB 3.0 or eSATA slots, it's then very easy to share those devices to the whole network via Samba (folder sharing), FTP, or even DLNA (to a TV/media streamer). You can create any number of user accounts, and then control whether they have read or write access to any number of shared folders/devices.
External storage setup on the Linksys WRT1900AC
I didn't have a chance to try it out yet (my network setup here at home is too complex), but the Media Prioritization mode sounds like it should be very useful. Basically, you can either make a whole device High Priority (say, your laptop instead of your mom's) -- or you can make a game/app High Priority (like Netflix, Skype, etc.) This should mean when someone accidentally leaves BitTorrent running, it shouldn't impact your gaming or other important activities.
There's also full support for IPv6, and the usual VPN and firewall stuff, but that appears to be fairly common on modern routers now. Guess access is kind of cool: It works like when you connect to a "free" WiFi network in the airport -- it doesn't require a WPA password, but it pops up a web browser window where you have to enter the guest password. Useful if you don't want to give friends your Top Sekrit WiFi password.
Should you buy the Linksys WRT1900AC?
All in all, the Linksys WRT1900AC is a very capable router. In all honesty, I haven't used many other modern WiFi routers, so it's hard to say whether the 1900AC is worth buying or not. If you're only after high-speed wireless, then both Netgear and Asus have 802.11ac routers that are (theoretically) capable of 1300Mbps 802.11ac at a much lower price point ($200 vs. $280 for the Linksys).
If you're after a router that does it all, though -- and if you're excited about (eventual) compatibility with the OpenWRT firmware -- then the Linksys WRT1900AC is a fine choice. I never experienced any instability or connection droppage. All the features appear to work as intended. If you're in the market for a jack-of-all-trades router that's easy to set up, works with every wireless device in your home, and has strong performance to boot, you should buy the Linksys WRT1900AC.
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