After reading reviews and seeing the text on the page saying it "doesn't support optical cables," my assumption was that it means that it won't boost signal that the optical cable is receiving -- which, yeah it's fiber optic so it's just sending light pulses, that makes sense. However, my use case is an optical IN-WALL cable, which is fed by a 10ft standard (i.e. non-optical) HDMI cable, and after it comes out of the wall, it feeds into an 8ft optical cable and into the 4K60 TV. Before adding this booster, I was having a plethora of black frames where the video would cut out. It wasn't too bad at first, but after two days of it consistently getting worse and worse, I decided to try this guy out.
Old setup:
Gaming rig --> Snowkids 10ft non-optical HDMI 2.1 cable --> HDMI keystone coupler --> ATZEBE 32ft fiber optic CL3-rated HDMI 2.1 cable --> HDMI keystone coupler --> Monoprice Ultra 8ft non-optical 8K HDMI (probably 2.1?) cable --> Amazon FireTV
(Snowkids, ATZEBE, and Monoprice Ultra are brands, I've put them here to help with the clarity of describing my setup and also in case anyone wants known-good cables for this setup)
I just bought generic HDMI keystone couplers, nothing fancy (I also have no idea if the couplers need to be rated for HDMI 2.1 too for best signal or if those are fine as-is, but generics worked for me) I didn't want to have to do any weird conversions to/from ethernet after all this setup, and the TV *was* getting signal, just... not very well. My theory as to what was going on was the Snowkids 10ft cable was a bit too long for the signal to travel from my RTX 3080 TI to the AZTEBE 32ft optical cable without severe enough signal degradation to cause the optical cable to not really know what to do with the incoming signal and just crap itself trying to decode it all before it even got to the Monoprice 8ft cable which just passed along that same stuttering to the FireTV.
So, I bought the cheapest very-short HDMI 2.1 8K-capable cable I could find (a Yuaice non-optical 1.5ft cable for just over three bucks) -- this Cable Matters 48Gbps Active 8K HDMI 2.1 signal booster, and a Skullcandy microUSB cable to provide power for the signal boosting feature that I bought it for
New setup:
Gaming rig --> Yuaice 1.5ft non-optical HDMI 2.1 cable [new addition] --> Cable Matters 48Gbps Active 8K HDMI 2.1 signal booster [new addition] --> Snowkids 10ft HDMI cable (same as before) --> [this is the point where I suspect the signal degradation was causing issues!] HDMI keystone jack --> ATZEBE 32ft optical HDMI cable (same as before, as is the rest of this run to the TV) --> HDMI keystone jack --> Monoprice 8ft cable --> FireTV
The ONLY thing I changed was unplugging the Snowkids 10ft cable from my gaming rig, plugging in the Yuaice 1.5ft cable to the gaming rig, then this Cable Matters HDMI 2.1 signal booster into that Yuaice cable, then plugging the Snowkids 10ft cable back into the Cable Matters HDMI 2.1 signal booster, effectively boosting the signal 1.5ft away from the RTX 3080 TI on my gaming rig before it goes through the entire run.
And... it worked! I've been able to use my desktop from my TV now and play games from the gaming rig on my TV without ANY black frames at all! Not even a one since adding this signal booster! I went from a black frame every few seconds to none for several, several hours! VERY happy with this purchase and WILL recommend to ANYONE having issues with signal loss on fiber optical in-wall runs.
So, when they say "This adapter does NOT support active fiber optic HDMI cable" in the description, I guess they mean that the signal booster part won't boost signals if you plug the fiber optic HDMI cable directly into the Cable Matters HDMI 2.1 signal booster? maybe? It certainly works VERY well for longer non-optical runs *into* an optical cable, coupled with another non-optical cable after said optical cable as I am doing. Maybe optical cables have their own in-built limits on signal strength or some such that means you don't get any benefits from running an optical directly into one of the ends of this guy, I don't really know, but it certainly solved my issue so I won't complain one bit! :)
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From the brand
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Cable Matters, with headquarters in Southborough, Massachusetts, offers a complete line of cables, adapters, docking stations, and networking products for the home, office, and data center. Cable Matters offers first-class, quality, and affordable products backed by an exceptional customer experience.
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Product Description
Vibrant 4K Video
- 4K (3840x2160) @ 60Hz video resolution support
- DTS and Dolby stereo surround sound support
- HDR color depth support
HDR Color Depth Support
- Increased color spaces and brightness
- Dynamic color mapping
Lightweight & Portable
- Weighs less than 1 ounce
- Blue LED verifies HDMI signal detection
Plug & Play
- Labeled INPUT and OUTPUT ports
- Optional USB power boost
- USB charging cable + wall charger are sold separately
Comparison Products
 HDMI 4K Repeater |  HDMI 8K Repeater |  4K HDMI Extension Cable |  USB-C Charging Cable |  USB 2.0 Extension Cable |  USB 3.0 Extension Cable | |
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Customer Reviews
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713
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713
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1,474
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1,181
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745
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91
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Price
| $17.99 | $19.49 | $16.49 | $14.99 | $17.49 | — |
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Connector Types
| 2x HDMI Ports | 2x HDMI Ports | HDMI Male to HDMI Female | USB-C to USB-A | USB-A Male to USB-A Female | USB-A Male to USB-A Female |
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Video Resolution
| 4K@ 60Hz | 8K@60Hz, 4K@120Hz | 4K @ 60Hz | N/A | N/A | N/A |
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Active Chipset
| ✔ | ✔ | ✘ | ✘ | ✔ | ✔ |
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Available Lengths
| N/A | N/A | 1.5, 3 6, 10 Feet | 3.3, 6.6 Feet | 16.4, 32.8 Feet | 16.4, 32.8 Feet |
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Model Number
| 103084 | 103094 | 300017 | 201001 | 200020 | 200040 |
Compare with similar items
This Item  Cable Matters Active HDMI to HDMI Repeater (Female to Female HDMI 2.0 Signal Booster) with 4K 60Hz Resolution and HDR for Blu-ray Player, HDTV, HTC Vive, Oculus Rift VR Headset and More |  |  | ![[Ultra High Speed HDMI Certified] Cable Matters 2-Pack 48Gbps 8K HDMI Cable 3.3 ft / 1m with 8K@120Hz, 4K@240Hz and HDR Support for PS5, Xbox Series X/S, RTX3080/3090, RX 6800/6900, Apple TV, and More](https://m.media-amazon.com/images/I/41i9czgPgeL._AC_.jpg) |  |  | |
| Price | $17.99 | $38.49 | $53.99 | $13.99 | $23.99 | -11% $32.99 List: $36.99 |
| Delivery | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 | Get it as soon as Saturday, May 11 |
| Customer Ratings | ||||||
| Value for money | ||||||
| Picture quality | ||||||
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| Sold By | Cable Matters | Cable Matters | AccessTrading | Cable Matters | CS cable | KabelDirekt Products |
| cable type | HDMI | HDMI | USB | HDMI | HDMI | HDMI |
| connector type | DVI, USB, HDMI, Micro USB | HDMI | USB Type A | HDMI | HDMI | HDMI |
| connector gender | Female-to-Female | Male | Male-to-Female | Male-to-Male | Male-to-Male | Male-to-Male |
| cable length | — | 25 feet feet | 32.8 feet feet | 3.3 feet feet | — | 50ft feet |
| compatible devices | Tablet, Laptop, Television, Monitor, Personal Computer, Projector | PlayStation, Television, Xbox, Projector | Tablet, Printer, Personal Computer | Television, Xbox | Television | Any device with an HDMI port, including: TVs, notebooks, projectors, A/V receivers, Xbox Series X, Xbox Series S, Xbox One, PS4, PS5 & other video game consoles, monitors, UHD players, Apple TV devices, PCs, Blu-ray players |
| data transfer rate | — | 48 gigabits per second | 0.48 gigabits per second | 48 gigabits per second | 18 gigabits per second | 18 gigabits per second |
Reviews with images
Samsung Q80r owner with mclassic
Finally with this hdmi repeater I can enjoy my mclassic on my Samsung Q80R. All it would do is flicker black screen on and off no matter what I did. With this repeater (plugged in) it hasn't flickered once. I'm just so happy to actually be able to use 1440p with the mclassic on my older consoles with a tv that supports that resolution.Update i had to send it back it won't work with GameCube and Mclassic 😥
Top reviews from the United States
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Top reviews from other countries
Izanagi
Rispetta le funzionalità promesse
Reviewed in Italy on April 22, 2024Style: HDMI 2.1Verified Purchase
Oktay Aldikacti
8K HDMI 2.1 Repeater.
Reviewed in Germany on March 2, 2024Style: HDMI 2.1Verified Purchase
John
This is a must for gamers with an LG OLED TV.
Reviewed in the United Kingdom on February 2, 2024Style: HDMI 2.1Verified Purchase
