--- product_id: 31222491 title: "Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor" brand: "channel master" price: "฿195" currency: THB in_stock: false reviews_count: 9 url: https://www.desertcart.co.th/products/31222491-channel-master-amplify-adjustable-gain-tv-antenna-pre-amplifier-built store_origin: TH region: Thailand --- # built-in LTE/5G/FM interference filter 17-30 dB adjustable gain weatherproof for indoor/outdoor use Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor **Brand:** channel master **Price:** ฿195 **Availability:** ❌ Out of Stock ## Summary > 📡 Amplify your signal, amplify your binge—never miss a moment! ## Quick Answers - **What is this?** Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor by channel master - **How much does it cost?** ฿195 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/31222491-channel-master-amplify-adjustable-gain-tv-antenna-pre-amplifier-built) ## Best For - channel master enthusiasts ## Why This Product - Trusted channel master brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Weather Durability:** Compact, rugged housing designed to thrive indoors, outdoors, or in your attic—rain or shine. - • **Interference-Free Viewing:** Advanced LTE/5G/FM filters block smartphone and transmitter noise for uninterrupted streaming. - • **Precision Signal Boosting:** Fine-tune your reception with 17-30 dB adjustable gain for crystal-clear channels. - • **Trusted Legacy Performance:** From a brand with 75+ years of antenna expertise, backed by best-in-class warranty and support. - • **Plug & Play Power Flexibility:** USB-powered with easy push-button gain control—installation is a breeze for pros and enthusiasts alike. ## Overview The Channel Master Amplify Adjustable Gain Preamplifier enhances TV antenna signals with 17-30 dB gain, featuring a built-in LTE/5G/FM filter to eliminate interference. Its compact, weatherproof design supports versatile indoor or outdoor installation, powered via USB with easy push-button control. Trusted since 1949, it delivers reliable, high-quality signal boosting for sharper, more channels and less pixilation. ## Description Buy Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor: AV Receivers & Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Amazing amplifier - can actually be too strong! - I've been using a flat fractal-style TV antenna for my living room TV since about 2015 and it did a great job picking up local stations about 99% of the time. I later added a SiliconDust HD HomeRun into the mix so I could share the signal to all the TVs in the house via my Emby media server. Unfortunately, due to changes in the location of local broadcast towers, I had to locate the antenna in my living room in an annoying location for it to work properly. I purchased this amp and a 'matching' Channel Master STEALTHtenna (see my review on that product). I initially installed the booster in high-gain mode and went from 11 channels to 15! This was a great improvement - and it worked great... for a while. Fast forward to last week and I realized I couldn't tune in some of the local channels, but could still see some more distant ones. I pull out the iPhone and fire up "Signal GH" again and I see that the signal strength is 100% but my signal quality is really low. Since I've been working with TV antennas long enough, I see the problem and realize what an ID:10T I've been - and immediately proceed to flip the booster to low-gain mode. Now I get *25* channels many with 100% signal strength and near 100% signal quality. I can now see all the local repeaters that were interfering with the main signal. I also now receive several channels from over 100 miles away, past the local group of towers. I also now see a host of channels from about 65 miles away, picked up on the BACK side of the antenna. Of the 25 channels I can now see, about 17 are worth keeping in my channel lineup. So kids, the moral of the story: don't be like me and immediately assume that you need 30db of boost when 17db is plenty. ------------------------- My notes on installation: Installation is a snap... assuming you've installed an outdoor antenna before. I mounted my new STEALTHtenna and pre-amp on the j-mount for my old satellite dish. (after removing the dish of course) I installed short (18-inch) pigtail cable between the antenna to the correct side of the pre-amp. Then connected the longer run to the indoors via a grounded lightning suppressor to the (included) power injector. The injector is powered by a USB adapter (cable and adapter included.) For the main run, I reused the high-quality quad-shielded RG6 I previously installed for my satellite dish. All terminations have good quality waterproof compression F connectors. I usually seal everything with waterproof tape for extra protection, but I couldn't find my roll of coax tape - so I may come back to that later if needed. Even the local cable companies never seem to use the tape anymore since THEY switched to waterproof connectors, so maybe I don't either. Using the included zip-ties, I attached the the pre-amp to the base of the j-pole below the antenna. I don't really like how it looks, so I may re-mount it later on - especially if I ultimately decide to install a taller mount or an extension pole. Review: Outstanding Pre-Amp—Works Exactly As It Should (If You Know What You're Doing) - I've been using the Channel Master Amplify for several years now, and it's hands down one of the best TV antenna preamplifiers out there. It has everything you'd want in a quality pre-amp: adjustable medium-to-high gain (17–30 dB), built-in LTE/5G/FM filtering to cut interference, and the flexibility of both power over coax and direct-connect power options. This preamp is designed exactly how a good one should be: it's meant to preserve and boost a good signal at the source, not magically create one from nothing. If your antenna isn't receiving a usable signal in the first place, no preamp—this one or any other—will fix that. The best a preamp can do is deliver to your TV the same signal quality your antenna is receiving at the source (e.g., if you connected your TV directly to the antenna outdoors). Some negative reviews here seem to misunderstand how preamps work. If someone installs this amp and still can’t get good results, the problem is likely the antenna or it's placement, not the amp. A negative review of this product only holds weight if the reviewer got clearly better results with a different brand amplifier—which I highly doubt in most cases, because physics is physics. This amp is top-tier in performance and features. For anyone who understands what a preamp can (and can’t) do, and installs it correctly (especially placing it close to the antenna), this is a fantastic piece of equipment. Highly recommended. ## Features - Works With All Indoor or Outdoor TV Antennas - Can Be Installed Indoor, Outdoor or in Attic Due to its Compact Size and Heavy-Duty Weatherproof Housing - Improves Signal Quality, Decreases Pixilation and May Increase Number of Channels - Includes Built-in LTE Filter - Blocks Interference From 3G, 4G, 5G Smartphones and Transmitters with EMI & FM Out of Band Filtering (Does Not Pass FM Radio Signals to Avoid Over Amplification Issues) - Includes Easy Push-Button Adjustable Amplification (17 dB/30 dB) with Flexible USB Powering Options - Trusted Quality: Channel Master Has Been Manufacturing TV Antennas, Amplifiers and Accessories Since 1949 While Offering Best of Class Warranty and Support ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01FTX7M26 | | AntennaDescription | Television | | Best Sellers Rank | #120,144 in Electronics ( See Top 100 in Electronics ) #256 in Audio/Video Receivers & Amplifiers | | Brand | Channel Master | | Built-In Media | TV Antenna | | Color | Charcoal | | Customer Reviews | 4.2 4.2 out of 5 stars (1,871) | | Global Trade Identification Number | 00020572177771 | | Impedance | 75 Ohms | | Item Dimensions L x W x H | 5"L x 2.25"W x 1.25"H | | Item Weight | 12.5 Ounces | | Manufacturer | Channel Master | | UPC | 020572177771 | | Warranty Description | 120 days | ## Product Details - **Antenna:** Television - **Brand:** Channel Master - **Color:** Charcoal - **Global Trade Identification Number:** 00020572177771 - **Impedance:** 75 Ohms - **Manufacturer:** Channel Master - **Number of Items:** 1 - **Product Dimensions:** 5"L x 2.25"W x 1.25"H - **UPC:** 020572177771 ## Images ![Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor - Image 1](https://m.media-amazon.com/images/I/61KFCT0DfXL.jpg) ![Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor - Image 2](https://m.media-amazon.com/images/I/818pkep+1ZL.jpg) ![Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor - Image 3](https://m.media-amazon.com/images/I/71D0weK7YOL.jpg) ![Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor - Image 4](https://m.media-amazon.com/images/I/81+0madpP2L.jpg) ![Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor - Image 5](https://m.media-amazon.com/images/I/71LuWkm9C8L.jpg) ## Questions & Answers **Q: With my hdb91x antenna plus the cm-7777hd from savannah i do receive charelston and jacsonville. how do i keep them with no fading away.** A: 1.factors to consider: wooded area, valley, out door antenna....attic area....mine is in the attic 2. I have 2 units one at the antenna and and another that connects to the cable outlets to the TVs ...very little problems prior to that I was having the same problem...also check on line for best antenna direction(use compass for station signals) you'll need two people ...one for antenna adjustment second person to view best reception for your channels use cell phone ---walkie talkies---loud voice...better known as a " big mouth"...its trial and error...you'll eventually set it right...its take time ....so be patient...once you locate the right spot you will know....if then the is some disturbance...then just tweak it....good luck Just nto let you know my is working great...I have 5 tvs **Q: Can i use this preamplifier (cm-7777hd) and the ultra mini 2 distribution amplifier (cm-3412) same time?** A: Yes you can! That is what I had to do to get a strong signal to all of my TVs. I would buy an extended warranty with both items. The warranty sucks and mine died right after it was over. Now I have a new one with a Square Trade warranty just in case this one dies early too. **Q: Can I use this on a antenna that’s already amplified?** A: Yes, but you run the risk of overloading the front end of your TV receiver. That could lead to damage or a poor picture. If your TV can display the received signal strength from your antenna, check the signal strength before installing the CM-7777HD. If you see two or three bars out of 5, you can try the CM=7777HD on low amplification and immediately test the received signal strength again. If you see 3 or 4 bars you are good. If you see 5 bars you may be ok. I have my CM-7777HD installed at the antenna. I use a splitter to serve two TVs and have a second amplifier installed on each leg after the splitter. Hope this helps. **Q: This pre amp keeps loosing power green led shuts off no signal unplug power insertion plug back in works 10 to 20 minutes this is a new unit anyone ha** A: Return it. I purchased one along with a Channel Master 100 directional outdoor tv antenna long range CM3020, and struggled with it for a week all the while communicating with channel master. Still received only PBS station lost 29 channels. Finally removed it and plugged old radio shack preamp and tada! Recovered 29 channels. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing amplifier - can actually be too strong! *by T***Y on December 27, 2023* I've been using a flat fractal-style TV antenna for my living room TV since about 2015 and it did a great job picking up local stations about 99% of the time. I later added a SiliconDust HD HomeRun into the mix so I could share the signal to all the TVs in the house via my Emby media server. Unfortunately, due to changes in the location of local broadcast towers, I had to locate the antenna in my living room in an annoying location for it to work properly. I purchased this amp and a 'matching' Channel Master STEALTHtenna (see my review on that product). I initially installed the booster in high-gain mode and went from 11 channels to 15! This was a great improvement - and it worked great... for a while. Fast forward to last week and I realized I couldn't tune in some of the local channels, but could still see some more distant ones. I pull out the iPhone and fire up "Signal GH" again and I see that the signal strength is 100% but my signal quality is really low. Since I've been working with TV antennas long enough, I see the problem and realize what an ID:10T I've been - and immediately proceed to flip the booster to low-gain mode. Now I get *25* channels many with 100% signal strength and near 100% signal quality. I can now see all the local repeaters that were interfering with the main signal. I also now receive several channels from over 100 miles away, past the local group of towers. I also now see a host of channels from about 65 miles away, picked up on the BACK side of the antenna. Of the 25 channels I can now see, about 17 are worth keeping in my channel lineup. So kids, the moral of the story: don't be like me and immediately assume that you need 30db of boost when 17db is plenty. ------------------------- My notes on installation: Installation is a snap... assuming you've installed an outdoor antenna before. I mounted my new STEALTHtenna and pre-amp on the j-mount for my old satellite dish. (after removing the dish of course) I installed short (18-inch) pigtail cable between the antenna to the correct side of the pre-amp. Then connected the longer run to the indoors via a grounded lightning suppressor to the (included) power injector. The injector is powered by a USB adapter (cable and adapter included.) For the main run, I reused the high-quality quad-shielded RG6 I previously installed for my satellite dish. All terminations have good quality waterproof compression F connectors. I usually seal everything with waterproof tape for extra protection, but I couldn't find my roll of coax tape - so I may come back to that later if needed. Even the local cable companies never seem to use the tape anymore since THEY switched to waterproof connectors, so maybe I don't either. Using the included zip-ties, I attached the the pre-amp to the base of the j-pole below the antenna. I don't really like how it looks, so I may re-mount it later on - especially if I ultimately decide to install a taller mount or an extension pole. ### ⭐⭐⭐⭐⭐ Outstanding Pre-Amp—Works Exactly As It Should (If You Know What You're Doing) *by J***. on March 26, 2025* I've been using the Channel Master Amplify for several years now, and it's hands down one of the best TV antenna preamplifiers out there. It has everything you'd want in a quality pre-amp: adjustable medium-to-high gain (17–30 dB), built-in LTE/5G/FM filtering to cut interference, and the flexibility of both power over coax and direct-connect power options. This preamp is designed exactly how a good one should be: it's meant to preserve and boost a good signal at the source, not magically create one from nothing. If your antenna isn't receiving a usable signal in the first place, no preamp—this one or any other—will fix that. The best a preamp can do is deliver to your TV the same signal quality your antenna is receiving at the source (e.g., if you connected your TV directly to the antenna outdoors). Some negative reviews here seem to misunderstand how preamps work. If someone installs this amp and still can’t get good results, the problem is likely the antenna or it's placement, not the amp. A negative review of this product only holds weight if the reviewer got clearly better results with a different brand amplifier—which I highly doubt in most cases, because physics is physics. This amp is top-tier in performance and features. For anyone who understands what a preamp can (and can’t) do, and installs it correctly (especially placing it close to the antenna), this is a fantastic piece of equipment. Highly recommended. ### ⭐⭐⭐⭐⭐ Impressed as always with Channel Master product *by D***K on December 30, 2023* MM-7777HD arrived quickly, well packaged, appears to be good quality. However the 1st unit would not switch between Hi and Lo. Exchanged and the 2nd unit arrived within a few days and works extremely well. Easy to install and boosted my channel count and quality on stations 55 to 65 miles away. Picture quality also improved significantly with no pixelation on any channels. I am receiving all the channels in the Orlando, Fl area including PBS which broadcasts with a lower power than the other surrounding area stations. PBS would not even come up before I installed the amplifier. Heavy powder coated cast iron casing, not plastic and should weather for many years. Long time user of Channel Master products and not disappointed in this amplifier yet. Using with a Channel Master antenna that has been up for 15 years and has taken hurricanes with 130 MPH + winds and relentless sun with virtually no signs of wear. Even the plastic connectors for the aluminum fins have shown no wear. I also replaced the original Channel Master balum which was still working well with their CM3203 Balum which seems to be a much more durable heavy duty metal casing construction. I had put the external antenna up originally for emergency long time cable tv downtimes after storms . I have recently cut the cable with Comcast when my bill jumped over $40.00 a month and also upgraded all the coax with C.M. cables and installed a OTR Tivo DVR so my wife could record her PBS craft shows. Could not be happier. ## Frequently Bought Together - Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor - Channel Master Splitter 2 | 2-Way Splitter Distributes Digital HDTV Antenna Signal to 2 TVs, One Input and Two Outputs, Power Passing for Preamplifiers and Boosters, Low-Loss Design, Indoor/Outdoor - Channel Master LTE/5G Filter – Reduces Pixelation & Signal Issues from LTE, 4G, 5G Interference, Indoor/Outdoor Use, Built-in O-Ring for Weather Protection, Enhances OTA Digital HDTV Signal Quality --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/31222491-channel-master-amplify-adjustable-gain-tv-antenna-pre-amplifier-built](https://www.desertcart.co.th/products/31222491-channel-master-amplify-adjustable-gain-tv-antenna-pre-amplifier-built) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-27*