The ClearStream PA-19 Pre-Amplifier represents a breakthrough in HDTV antenna signal amplification in an affordable and compact design. Offering outstanding noise performance, modest gain and excellent resistance to overload, the PA-19 is best in class in terms of overall balanced performance. While this Pre-Amplifier works well with any antenna, the CPA19 is designed with the ClearStream antenna models in mind. When installed along with a ClearStream antenna, the amplifier looks as if it becomes part of the antenna itself. It is aesthetically quite pleasing as well as effective!