Amplify+ Adjustable Gain Preamplifier for Professionals

Television Antenna Booster CM 7778HD

List Price: $99.00
Price: $99.00

Description Technical Specifications FAQ's & Support Docs

Amplify+ is intended for outdoor professional use, including multi-dwelling units and commercial applications. The product provides separate UHF and VHF inputs for two-antenna, band-specific installations, as well as a switchable FM trap.

Amplify+ is an outdoor preamplifier designed for mast-mounting with the TV antenna(s). Professional installers may choose options for High gain, Low gain, FM signal blocking and band-specific dual antenna use if required.

Unlike the consumer-ready Amplify product, Amplify+ does not include a USB powering option for indoor use.

Outdoor Heavy-Duty Housing

Amplify+ is constructed of a die-cast metal housing with weatherproof ports to support outdoor installations in extreme weather conditions.

Adjustable Amplification

Amplify+ provides adjustable settings that allow the installer to select the appropriate gain required for a specific installation scenario, eliminating the potential issues encountered from either too much or too little gain. The internal switch can be placed at either a High or Low setting.

Adjustable FM Trap

Amplify+ provides a trap mechanism to block unwanted FM Radio signals from FM-enabled commercial TV antennas, which can cause interference with UHF and VHF television signals. Pass-through of FM signals can be enabled or disabled via an internal switch.

LTE Filtering

Like the consumer-ready Amplify product, Amplify+ provides LTE signal filtering. The proliferation of LTE signal towers and connected LTE devices are a growing cause of intermittent disruption of over-the-air broadcast television signals. These disruptions can result in weak signals, pixelation or even channel loss, and can be especially disruptive when an amplifier is used with a TV antenna.

What’s Included

AMPLIFY+ TV Antenna Amplifier
Power Inserter
Power Adapter
Mounting U-Bolt
(2) Mounting Screws
Installation Guide
1-Year Limited Warranty


Improves Signal Quality
Dual Antenna Inputs (VHF & UHF)
Switchable FM Trap
Decreases Pixilation
May Increase Number of Channels
Ultra Low Noise
Adjustable Gain
Blocks LTE Interference from 3G/4G Smartphones and Transmitters
EMI & FM Out of Band Filtering
Heavy Duty Rating for Outdoor Use
Mast Mounted for Close Proximity to Antenna
Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 15 Write a review.

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  0 of 0 people found the following review helpful:
5 of 5 Simplified my installation & fixed PC tuner issues October 8, 2020
Reviewer: Springbok from Grants Pass, OR  
This unit replaced separate diplexer, CM-3201 LTE filter, and HDA-200 distribution amplifier installed five years ago. The new setup is less complex and therefore substantially neater.
Lead-in from the antenna is 80' of RG-6 to a splitter, with 70' of RG-6 thence to the TV and a short run of under 10' to my PC.
At low gain the TV signal strength is equivalent to its previous low range on those channels where it fluctuated. At high gain the TV signal strength is equivalent to its previous high range, with no evidence of overwhelming the TV tuner. Reception using the TV tuner in my PC improved substantially, from a sometimes pixelated display, to a consistent display.

  0 of 0 people found the following review helpful:
5 of 5 Perfect for cord cutters October 8, 2020
Reviewer: Tmike from West Michigan  
Installation was straightforward...increased channels...major networks are crystal clear..sorry I waited so long.

  0 of 0 people found the following review helpful:
5 of 5 Preamplifier and DVR April 14, 2020
Reviewer: Robert from Atlanta,Ga  
The preamplifier works great! Many times I would not receive channels that were weak. After installing the preamp all those channels became clear and picked up 2 more new channels. I have the DVR and it's great too! Thanks ,Channel Master!

  0 of 0 people found the following review helpful:
5 of 5 CM-7778HD Preamplifier I highly recommend it. April 6, 2020
Reviewer: Anonymous Person  
This Preamplifier brought in all of Mississippi area channels perfectly worth every penny I paid for it and I live in an area surrounded by tall trees and I'm over 35 miles from the main TV towers.

  0 of 0 people found the following review helpful:
5 of 5 Channel Master Support March 10, 2020
Reviewer: Burl from Stephenville, TX  
The closest TV transmitters were 77 miles. I purchased the CM-5020 antenna and was still experiencing dropouts. Purchased the Amplify+Adjustable preamp. Times worked well then would loose all stations. Worked with the support team, numerous tests all looked good, sent unit back to CM. Found nothing wrong. Had CM send me the Titan 2 high gain,  when connected received no channels. Spoke with local TV technician and was told I was over driving my TV. Went with a lower gain amp and good reception. During this whole process CM support was very supportive and helpful. Listen to my concerns and were very professional .
Highly recommend their support.

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