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Amplify + Adjustable Gain Preamplifier for Professionals

Channel Master CM7778HD


  • Improves signal quality
  • Dual Antenna Inputs (VHF & UHF)
  • Switchable FM Trap
  • Decreases pixilation

Quick Specs

  • Type: Amplifier
  • Energy Star Rated: No

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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, pixilation 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


  • 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
Impedance (Input and Output) 75 Ohm
Connector F-type
Frequency range 54MHz~88MHz, 174MHz~260MHz, and 470MHz~685MHz
Gain VHF 23dB (High) / 16dB (Low)
Gain UHF 26dB (High) / 20dB (Low)
Gain Combined 23dB (High) / 16dB (Low)
Noise figure 1.5dB
UL listed Yes
RoHS compliant Yes
Return loss <-15dB
Input Voltage 12-15 VDC
FM trap 95-108 MHz; >13dB
Operating temperature -40 C to +60 C
Size (product) 3.25 x 5.25 x 7.75 in
Size (packaging) 8.125 x 3 x 5.125 in
Weight (product) 1.5 lb
Weight (packaging) 2 lb

Quick Specs

  • Appearance

  • Type: Amplifier

  • Features

  • Energy Star Rated: No

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

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Electronics can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new electronics should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.