Instruct: Classify the given review into positive or negative sentiment.
Query: Disappointed

When I bought my HDTV antenna, it came with a small amplifier, which I connected before the amplified splitter that divides the signal to three TV sets. One of the sets doesn't get a couple of local digital channels, or have intermittent reception. I just thought that replacing that small amplifier with a more robust one would boost the signal and solve my problems, but this product didn't deliver the extra gain I needed. It worked worse than the small amplifier, and I couldn't get some of the digital channels that I got before, even with the gain at maximum. What a disappointing performance.