Arris Surfboard S34 DOCSIS 3.1 Multi‑Gig Cable Modem | 2.5Gbps + 1Gbps Ethernet Ports | Xfinity, Cox, Spectrum for Cable Internet Plans up to 2.5Gbps Next Gen Upstream. Modem Only, Router Required
Condition: Used - Like New
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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 5 left in stock, order soon!
Arrives
Friday, Feb 13
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Style: Cable Modem
Features
- MultiGig speed for today & tomorrow: DOCSIS 3.1 performance supports cable internet plans up to 2.5 Gbps, delivering ultrafast streaming, gaming, and downloads.
- Future Proof Upstream: Support for the next generation upload speed tiers offered by cable internet providers.
- Save on rental fees: Own your modem and avoid monthly equipment chargescheck with your cable provider for plan compatibility.
- Compact, modern design: Spacesaving footprint with simple LED indicators for power, upstream/downstream, and online status.
- Easy setup: Connect cable, power on, and activate with your cable provider. Then connect a WiFi router to the Ethernet port for home Wi-Fi coverage.
- Modem only: This cable modem requires a separate Wi-Fi router or mesh system for home Wi-Fi network.
- Fast Ethernet: Provides a 2.5 Gigabit Ethernet port to support connecting high speed Wi-Fi routers. Plus, a 1 Gigabit Ethernet port lets you connect an additional wired device or backup handoff (service provider configuration dependent).
- Provider compatibility: All SURFboard modems are CableLabs certified to work across major US Internet Service Providers. Tested and qualified for use with Cox, Xfinity, and Spectrum. Check with your provider to confirm device model support.
- Not compatible with fiber, DSL, or satellite services.
Description
The S34 combines DOCSIS 3.1 technology with a 2.5 Gigabit Ethernet port to unlock multiGig internet plans and support for next generation upload speed tiers. Future proof your home network!
Brand: ARRIS
Internet service provider: Charter, Comcast, Cox, Spectrum, Xfinity
Connectivity Technology: Ethernet (1 - 2.5Gb and 1 – 1Gb)
Compatible Devices: Router, Personal Computer, Laptop gaming console
Product Dimensions: 10.55"L x 6.75"W x 2.46"H
Brand: ARRIS
Item model number: S34
Item Weight: 1.41 pounds
Product Dimensions: 5.25 x 1.8 x 5.24 inches
Item Dimensions LxWxH: 5.25 x 1.8 x 5.24 inches
Color: White
Manufacturer: Vantiva
Date First Available: July 15, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Feb 13
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Very impressed. This is a solid cable modem and up to date. While I'm not an expert, this replaced my previous ARRIS and it's an improvement. Speeds are solid, set up was easy, although boot up time did take a bit, but that's expected. But it works fantastic with our internet and it's better than anything you can rent from them. No issues with it after a few months. You won't be dissappointed
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Reviewed in the United States on December 2, 2025 by Dan
I have only had this Modem for 48 hours, so this is a preliminary review. I have been a Cox Communications customer for over 20 years. The only problem I had with setting up this Modem was that the first customer service representative I spoke with did not properly save the HFC MAC ID number. So, initially there was no internet and this particular representative scheduled an appointment for a technician to come out. The next morning I called Cox back and spoke to an entirely different representative who caught the error, and now the Modem is up and running. I have only 1 Gigabyte service at the moment, but that is more than adequate for my needs. I have the router ethernet cable plugged into the 1G port. The Modem works just great. I am now able to access a website that is monitored by Cloudflare that I was not able to access with the previous outdated Modem. For the first 48 hours, I can say my internet connectivity and website access have considerably improved. Only time will tell how reliable this Modem really is. I believe it was a worthwhile investment - no more paying rent to Cox, and the Modem is "future proofed" for 2.5 Gigabyte service. I am thankful the second Cox representative was able to resolve the internet connectivity problem resulting from the incorrectly saved MAC ID number. If the conditions surrounding this Modem change, I will edit the review.
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Reviewed in the United States on September 24, 2025 by Escalante48
Set up was easy and performance is great
Reviewed in the United States on January 8, 2026 by Edwin Rodriguez
Excellent cable modem with fast upload speed. Prior reviews said that the unit overheats. I was concerned about that before I ordered it. But it is actually quite nice. The unit is not too warm.
Reviewed in the United States on January 2, 2026 by Amazon Customer
I had the SB8200 for many years, then I decided to upgrade to the S33, just to see if it would make a difference, it did, but it was underwhelming and probably not worth it, except that I was able to help a friend with the SB8200. But then the S34 finally came along. BOOM! Instant upgrade from 1.2gbps (1200mbps) download to 2.0gbps (2000Mbps) download and the upload speeds are now 300+mbps with the S34, up from 40mbps with the S33! Practically exactly as advertised by the ISP! This is all thanks to the OFDM channel on the upload signal. Good stuff. Arris has typically been very reliable and even though this cable modem gets very hot because of where it is located and it’s lack of additional ventilation, it is still handling nicely. Definately place it in an open area if you can, it will get very warm/hot. I have the LED off under normal conditions, which is great because you can easily tell if something is going on because you’ll see lights flashing instead of nothing. If it’s powered down, that will be obvious because the network will be down. There will be some growing pains with the new equipment and getting the ISP to adapt and create better automated systems, but it did get detected and connected automatically in just a matter of a few minutes. It was just an issue with the ISP when it came to getting a separate router connected and back online. They had to learn how to send a proper configuration to the cable modem, which they did, so that was good. But you can easily connect directly from the back port of the cable modem to check for a good connection, then it’s just a matter of having the proper settings on the cable modem (which the ISP controls) and on the router (which you control, and sold separately). That’s where they (the ISP) need to learn, so that they know an external device/router will always be connected to this cable modem. All good though, the instant upgrade was VERY noticeable, files upload MUCH faster than before, video conferencing is very smooth and reliable. Its great. Excellent, would recommend. Definately buy this instead of the S33, get the S34 instead!
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Reviewed in the United States on September 21, 2024 by FloridaGator FloridaGator