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Channel Master

Channel Master CM-7778HD Amplify+ Adjustable Gain Preamplifier - Professional Outdoor TV Antenna Amplifier

    • Based on 247 reviews
Condition: New
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$114.00 Why this price?

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This item is eligible for return within 30 days of receipt

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Availability: In Stock.
Fulfilled by Channel Master
Arrives May 23 – May 25
Order within 17 hours and 2 minutes
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Features

  • This product should be installed by a qualified technician to ensure proper performance and suitability.
  • Improves signal quality & decreases pixilation. May increase number of channels.
  • Dual Antenna Inputs (VHF & UHF)
  • Adjustable gain & FM trap switches
  • Blocks LTE interference from 3G/4G Smartphones and transmitters

Item Dimensions LxWxH: 3.25 x 7.75 x 5.25 inches


Manufacturer: Channel Master


Brand: Channel Master


Product Dimensions: 3.25 x 7.75 x 5.25 inches


Item Weight: 13 ounces


Manufacturer: Channel Master


Item model number: CM-7778HD


Is Discontinued By Manufacturer: No


Date First Available: June 7, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 23 – May 25

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.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • "Green Star" in sky !
Review Image by Greg Livesay Greg Livesay
Works well, easy installation, and has an LED Light indicating it's POWERED! At Night, it sometimes looks like a Green Star is in the Sky when looking up at the 45 Ft Tower ! Great for Rural Fringe area Reception. Used with 8 Bay "BowTie" Antenna and RG-11 though RG-6 more than adequate.
Reviewed in the United States on December 2, 2020 by Greg Livesay Greg Livesay
    • The Best Antenna Pre-Amplifier, Channel Master CM-7778HD!!
I bought this to replace a 5 year old antennas direct preamp, I was losing channels with the antennas direct preamp. The CM7778HD seemed like what I needed. I am in a deep fringe area (in a valley with hills and trees keeping from line of sight to towers) about 40 miles from any TV towers plus I have a 50 foot run of coax to tha antennas and split to 3 TV’s in the house. I hooked up the CM7778HD with separate UHF and VHF antennas set on the high gain setting, turns out it was too much on the high gain setting due to interference on some channels that were clear before on the old pre amp. I changed the CM7778HD to the low gain setting and I am getting all channels that are reachable in my area. The CM7778HD is a great pre amplifier, made very well and easy to install. ... show more
Reviewed in the United States on April 2, 2019 by DS
    • I think it works better then the other brands I own....I think
This Adjustable Gain Amplifier has two adjustments (high/low), not variable. To change the Gain or the FM Trap or the Duel to Single antenna input selection requires one to open the unit removing four screws. It could be a problem if mounted on the antenna mast. I think a sealed flip-up access door would be better served. ... show more
Reviewed in the United States on January 1, 2021 by Phil
    • Channel Master Preamp works like a champ.
I have four high power channels and one low power channel available. I need the NBC low power channel for a couple of Packer games. Per my TV I had strong signal on the high power channels and next to nothing on the low power channel. I installed the Channel Master preamp in my basement not on the mast as recommended so if I needed to adjust gain I didn't need to climb a ladder. Before I installed the preamp the high power channels were 98/100 on my TV's signal strength meter and the low power channel - no signal. On the out-of-box 16dB gain setting I have 98/100 on the high power channels and 36-54/100 (depending on the weather) on my low power channel. Perfect! I liked the results so much I bought another CM preamp for my Yagi radio antenna. ... show more
Reviewed in the United States on May 10, 2019 by Deadhead
    • Powerful, but way too noisy, VHF does not work at all.
One thing this did somewhat well was boost the strength of adjacent market channels. Unfortunately, this product also increased noised on all channels and does not have a good noise floor. On my HDHomeRun monitor, I had stations that were marginal strength (Around 55-65) to to moderate strength (75-85), but this also caused SNR to tank from around 55-65 to right at 50 or just below, which made most of these stations inaudible to receivers. So, while it increased strength, it dramatically increased noise. I have an existing preamp from Wingard , it does not boost as much but it also is low noise and does not cause additional noise. So, I am torn, but I have to send this back and deal with the occasional low signal of these distant channels. Also, the VHF toggle is a joke, when using the combined input, it basically filters out the VHF channels. For this reason, I feel the unit is defective. ... show more
Reviewed in the United States on April 3, 2020 by Sean
    • Excellent Purchase
This was just what I needed. I had tried a couple of different, lower priced boosters without much success. With the two others I purchased recently the channels would come in sometimes but not every time. But with this Channel Master CM-7778HD I was shocked how good it was. In my area there are a total of four major channels of networks (ABC, NBC, CBS, Fox) including their sub-channels and some independent stations, I have 37 channels to watch now. The NBC affiliate is 70 miles from me. All come in clear. I live in an upstairs apartment, and I use a ClearStream antenna. Although occasionally the weather will cause issues (storms) the rest of the time the channels are clear. I recommend you purchase this product and don't mess with the cheaper versions. ... show more
Reviewed in the United States on May 14, 2023 by Jack Bullock
    • Liked Features and performance BUT Failed after only 11 days
I really liked this unit and was willing to pay a fairly hefty price for it. I Liked that it had 2 antenna inputs for UHF and VHF and I liked the High Gain capability of 23/26 db. BUT it Failed after only 11 days. My Tablo could only pick up 20 channels total with only 9 with acceptable signal, and None of my VHF channels. The VHF side quit working first. Had it not failed, I would have given it a 4 or 5 star. I replaced it with a two way splitter(3.5db loss) to join my 2 antenna leads into one lead and then used my previous Channel Master CM-3410 Ultra Mini Amp with only 15db gain. After seeing this perform well, I realize I didn't need the high gain after all. My Tablo now picks up 65 channels of which 55 have great signal strength. ... show more
Reviewed in the United States on April 27, 2020 by lbt
    • Good reception
I live on the edge of the world in the deep dark forest. Don’t think I’d have any reception if not for this signal amp. I do recommend this piece of equipment
Reviewed in the United States on October 22, 2023 by Jerry

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