Amplify+ Adjustable Gain Preamplifier for Professionals

Can't go wrong with a Channel Master product. Yes, they cost more, but they last longer, especially in extreme conditions such as an attic.

Though this is a good amp it is only recommended if you have ONE outdoor antenna. It has the option to connect a VHF and UHF separately but it had a real hard time getting good signal on each of the seperate ports. It worked better just combining the antenna itself and connecting it to just the one UHF/VHF port. It is nice that it has a low and high gain giving you two types of gain to test. Biggest problem with these amps is it blows up all signal in whole. This means channels that don’t need this amp will get distorted because now the signal is too high. It worked decently with the Channel Master Omnidirectional antenna but it did not solve the issues of fixing low signals while keeping good higher signals. For my location I ended up returning and getting a Televes amp which balances all signals. The difference was exceptional compared to this Channel Master.For me I am located in New England near New Haven and NYC.

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.

easy to assemble and works great

I don't have any ghost picture or freeze screens because of this signal amp. It has and adjustable gain and it is just what I needed.

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.

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.

This is replacing and old channel master pre amp that finally died after 14 years. I installed this new one and went ahead and replaced my RG6 cable while I was at it.On old one best signal strength I had was around 75 percent on two groups of channels. Rest were in low 60s and there were two groups of channels that were unwatchable. I live 38 to 48 miles from towers with Forrest in between. The edge of the woods are 15 feet away from the antenna and trees tower over it.I was tickled when I checked the results. All channel groups are coming in giving me 24 channels (All that’s available in my area) and they all come in at 100 percent signal strength !!!!!!Even the channels that were unwatchable are at 100 percent !!!!!I will give it several weeks and see how it does day and night and in bad weather. If it holds up I will drop the dish locals and save 12 dollars a month.