With an advanced 1.6 GHz dual-core CPU and an impressive 512MB of RAM, the WRT1900ACS delivers improvements in wired, wireless, and network storage performance over its predecessor, the WRT1900AC. At speeds up to N600 + AC1300 Mbps, the WRT1900ACS meets the needs of the most demanding home Wi-Fi networks. Equipped with a four-antenna configuration, the router provides exceptional signal strength and range. Advanced users also have the option of modifying the router with open source firmware.

Linksys WRT1900ACS
1.6 GHz Processor


With a professional-grade 1.6 GHz dual-core ARM processor, the WRT1900ACS delivers faster throughput speeds and easily handles multiple data streams simultaneously. The result: better performance, particularly in today's multi-device homes.


The WRT1900ACS comes equipped with 512MB of RAM that works in tandem with the 1.6GHz CPU to move movies, music, and other large files faster. With more than double the memory of its predecessor, the WRT1900ACS improves data transfer speeds, allowing you to do more, faster.

USB 3.0, ESATA, and Gigabit Ethernet


The WRT1900ACS has four Gigabit Ethernet ports that are perfect for transferring large media libraries at speeds 10X faster than Fast Ethernet. To stream or send large files across your network at high speed, simply connect a flash drive to the USB 3.0 port or an external SATA storage device to the eSATA port. The eSATA port also serves as a USB 2.0 port.

Linksys WRT1900ACS Ports


The WRT1900ACS features four external, adjustable high-performance antennas that provide strong, reliable coverage throughout your home. The unique antenna diversity technology onboard helps your laptop, tablet, smartphone, and other connected devices achieve an optimal connection, wherever they are in your home. The antennas also enhance coverage for both 2.4GHz and 5GHz bands, keeping everyone gaming, downloading, and streaming without lag.


Designed especially for today's mobile-device households, the WRT1900ACS features Beamforming technology, which focuses wireless signals at a receiving device rather than simply sending out Wi-Fi in a general direction.

Open Source Ready


While the Linksys WRT1900ACS provides an outstanding experience via Smart Wi-Fi immediately out of the box, advanced users can further modify the router with open source firmware. Developed for use with OpenWRT, an open source, Linux-based operating system, the router offers an additional layer of customization to suit your needs.



Linksys Smart Wi-Fi lets you access your network anytime, anywhere. Using your browser or the Smart Wi-Fi mobile app, you can:

  • Prioritize devices or websites for video streaming and online gaming
  • Control inappropriate or distracting content
  • Monitor network activity and speed
  • Turn Wi-Fi access on or off for any connected device
  • Create a separate, password-protected guest network

Create your free Linksys Smart Wi-Fi account here: www.linksyssmartwifi.com


Smart Wi-Fi with Network Map

With the Network Map, you can:

  • See all devices on your network on a single screen
  • Track online status and signal strength of your devices
  • Measure bandwidth consumption by device
  • Create personalized names to easily identify your connected devices


Managing your network with Linksys Smart Wi-Fi is fast and easy:

Step 1 Set up your wireless home network

Set up your wireless home network using a Linksys Smart Wi-Fi Router.

The router will broadcast a wireless signal to your Wi-Fi-enabled devices like gaming consoles, TVs, mobile devices, and printers.

Step 2 Sign up for a Linksys Smart Wi-Fi Account

Sign up for a Linksys Smart Wi-Fi Account. It's fast and free.

Smart Wi-Fi software lets you access and control your home network from wherever you are, whenever you need to.

Sign Up Today

Step 3 Customize your network with the Linksys Smart Wi-Fi apps

Customize your network with the Linksys Smart Wi-Fi apps of your choice.

Upgrade the functionality of Linksys Smart Wi-Fi tools, by downloading exclusive Linksys Smart Wi-Fi apps to your mobile devices.

Smart Wi-Fi App Center

Technical Specs
  • Wi-Fi Technology:
    AC1900 Dual-band Gigabit, 600+1300 Mbps
  • Network Standards:
    • 802.11b
    • 802.11a/g
    • 802.11n
    • 802.11ac
  • Wi-Fi Speed:
    AC1900 (N600 + AC1300)
  • Wi-Fi Bands:
    2.4 GHz and 5 GHz (simultaneous dual band)
  • Wi-Fi Range:
    Very large homes
  • Number of Ports:
    1x USB 3.0 port, 1x USB 2.0 port, 1x eSATA port
  • Number of Ethernet Ports:
    • 1x Gigabit WAN port
    • 4x Gigabit LAN ports
  • Antennas:
    4x external, dual-band, detachable antennas
  • Processor:
    1.6 GHz dual-core ARM-based
  • Memory:
    128MB Flash; 512MB DDR3 RAM
  • LEDs:
    Power, Internet, 2.4 GHz, 5 GHz, LAN 1–4 (10/100Mbps or 1Gbps), USB 3.0, USB 2.0, eSATA, Wi-Fi Protected Setup™
  • Wireless Encryption:
    64/128-bit WEP, WPA2 Personal, WPA2 Enterprise
  • VPN Support:
    PPTP Pass-Through
  • Operation Modes:
    • Wireless Router
    • Access Point
    • Wired Bridge
    • Wireless Bridge
  • Storage File System Support:
    • FAT
    • NTFS
    • HFS+
  • Easy Setup:
    • Browser-based Setup
    • Linksys Smart Wi-Fi Setup
  • Certified Operating Systems:
    MacOS (10.X or higher), Windows 7, Windows 8.1, Windows 10
  • Minimum System Requirements:
    • Internet Explorer® 8
    • Safari® 5
    • Firefox® 8
    • Google Chrome™
  • Dimensions (LxWxH):
    121 x 75 x 26 mm (4.76 x 2.95 x 1.02 in.)
  • Weight:
    722.2 grams (28.43 oz)
  • Security Features:
    • WPA/WPA2
    • 128 bit AES link encryption
  • Regulatory Compliance:
    FCC class B
  • Other Certifications:
    • DNLA Certified
    • Wi-Fi Alliance
    • WPS Setup
  • Power Supply:
    Input: 100-240V ~ 50-60Hz; Output: 12V/2.5A
Package Contents
  • Linksys Dual-Band Gigabit Wi-Fi Router AC1900, WRT1900ACS
  • Quick Start Guide
  • CD-ROM with Documentation
  • 4 Antennas
  • Ethernet Cable
  • Power Adapter
Rated 3 out of 5 by from Where's wireless N? So it says it support wireless N. I have a Dell laptop with Intel(R) Centrino(R) Advanced-N 6205, my throughput on my speed test is barely at 2MB/S connected to 5Ghz. I'm also the same person that wrote the review of the EA8500 that I took back to BestBuy. Looks like I'll be taking this one back as well. I guess no more Linksys routers for me, two strikes so far. Here's my photos attached, the whopping 2.34MB connection is connected to 5Ghz and the better 73MB on 2.4G. How's that possible? If I enable TWC's Arris Modem's built in Wireless I get up to 133MB connection on N but I don't want to use the all in one from TWC. So, where's N mode? As i don't see it in the router settings.
Date published: 2016-02-22
Rated 5 out of 5 by from Best router I've ever owned personally Could hardly wait to receive the router for testing. I've been using it for a little over a week. Easiest router to setup. I've been configuring routers for more than 30 years. Its as simple as plug & play. If you were like me the manual on disc was in Russian, however I had already downloaded it from the linksys web sight. http://cache-www.belkin.com/support/dl/WRT1900ACS_FUG_ENandFR-CA.pdf Followed the 4 step on the CD cover and connected immediately. Warning! If you do not have an ac wi-fi adapter you will not get maximum speed. For this review I'm using the Linksys AE6000 Wireless-AC Mini USB Adapter for wireless. The router was tested in a not so ideal location. It is in a cabinet and very low. see pictures. I included a network map shop and everything is not on line. My Server, NAS, 4K TV, USB Storage connect to the router. Very pleased with the speed. I'm able to steam netfilx on several tv and grandkid on the xbox, without any buffering. 2 iPad, 2 Cell Phones and at least 4 workstations online 24/4. Will update after using a wi-fi analyzer, My 5GHz speed is 433.5Mbps, 2.4GHz speed is 200Mbps. Also can't wait to report back after flashing the firmware.
Date published: 2016-04-06
Rated 3 out of 5 by from Easy Setup and Remote Access, Bulky Design Super simple setup out of the box. Intuitive web-based admin panel. Was unable to add a USB printer on Mac OS X 10.11. USB Control Center seems to not be compatible. Large footprint and tall antennae great for range but make it difficult to find a unobtrusive spot for it. Clunky, dated industrial design. Smart Wi-Fi Apps promising... but seem like an after-thought. Currently the number of them is too limited to be a selling point. Easy to add Guest Accounts and devices. Network map is a nice feature. Would not recommend to a non-tech savvy friend. If you're not on a Mac and speed and the option to installing open source firmware is important, and size doesn't matter, then would recommend–just know that you are getting a beast of a router.
Date published: 2016-04-08
Rated 3 out of 5 by from Review Update This is an update for my earlier review JayA where I was getting slow throughput on 5Ghz. Additionally, the router would randomly reset itself. I have taken your response advice and reset the router back to Factory and reverted to the Factory firmware. I once again updated the firmware to ver. FW_WRT1900ACS_1.0.0.169041_prod and it did the same thing. I then reverted back to Factory firmware and settings, reconfigured the router and I'm getting much better results. As you can see from my screenshot my throughput is at what I was expecting. Unfortunately two tries with the new update firmware yielded the same results. I think it may be buggy, although that's not my call. Factory firmware works great so far regarding throughput. I'm going to wait a few days and see if this router will continue to reset itself as it did with the new firmware, ver I appreciate your patience with me and I'm out of my 14 day grace period for returning the router to BestBuy. So I guess I'm stuck with it good or bad. If this issue gets resolved then I will most definitely update and provide a much better rating.
Date published: 2016-03-03
Rated 5 out of 5 by from Powerful Wifi Router !!! I'm liking this new version WRT1900ACS with its new features Dual Core 1.6GHz, 128MB flash, & 512 !!!! MB DDR3 RAM !!!. I am currently running 4 pc's and 22 wifi devices connected with no drop. I'm glad I choose this new ACS over any other router out in the market. I also paired this ACS model with Linksys newest switches model WRT8 Ports Gigabyte & with the Linksys model SE3005 /5 ports.... I strongly believe I made the right choice. I would like to see Linksys built a big big FAT wifi router just for the looks. My last thought, good job Linksys ! WRT1900ACS is a winner..
Date published: 2015-10-15
Rated 5 out of 5 by from Easy Setup and Great Features It took me about 10 minutes to install and get connected to the internet opening the browser...didn't need to use the installation cd. The easiest router installation there can be. This router replaces my old one band WRT320n router and what a difference in the speed. Went from 300Mbps with the old router to 866Mbps with this one...(please see uploaded pics)....wow!, and this is on wireless not hardwired! The Smart Wifi has some very good tools to setup the router as you please. Streaming 9 devices at the same time and still getting the 866Mbps on my laptop without any problem.
Date published: 2016-03-31
Rated 4 out of 5 by from Mostly Pleased with the WRT1900ACS I moved from the E3000 to the 1900ACS for two reasons and those were better parent controls and hopefully better wireless coverage. I am pleased with the results in both cases. However, improvements in the guest control feature as well as parental controls would make this a superb router for those needing such features. I have had to restart the router a few times to be able to access the wireless side of the router. Using three different wireless devices produced the same message "unable to authenticate". Once the router was restarted all devices were then able to use the wireless connection. Not really sure why this happens, but it has only happened 3 times in about a month.
Date published: 2016-01-03
Rated 5 out of 5 by from Fastest WiFi Router! @ 866.7 Mbps Pros > Exceptional performance and extremely wide coverage range. Extraordinary throughput speed when testing with a WiFi Extender [Linksys RE6500] please see attached screenshots for details. Very intuitive setup, remote access, and router management. Great iOS app to manage the router from anywhere! Falshable firmware from OpenWRT. QoS feature cuts down the time required to buffer video streaming. Cons > None! Except the cost! but the reality is “you get what you pay for” Overall > This (WRT1900AC) is by far the best router I have had since its prodigy WRT54G, distributes exceptional throughput with N/AC wireless clients, and has outstanding speeds for future devices. Due to its OpenWRT flashable firmware, this becomes a very scalable router for the future!
Date published: 2016-04-14
  • 2016-05-31T11:27CST
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*The standard transmission rates—450 Mbps or 1300 Mbps (for 5 GHz), 600 Mbps (for 2.4 GHz), 54 Mbps, and 11 Mbps—are the physical data rates. Actual data throughput will be lower and may depend on the mix of wireless products used and external factors.
**While Linksys fully embraces the open source community and is providing open source use capabilities, they do not offer technical support on using open source firmware. Installing 3rd party firmware is done at your own risk and replacing factory-installed firmware with OpenWRT firmware will void your warranty. Please always seek the advice of more experienced users via open source community forums if you’re unsure.