What does an RTA measure when connected to the speaker outputs of an OEM amplifier?

When connected to the speaker outputs of an OEM amplifier, an RTA (Real-Time Analyzer) measures frequency response. The frequency response indicates how different frequencies are reproduced by the audio system, providing insights into whether certain frequencies are being amplified or diminished.

This measurement is crucial for tuning a sound system to ensure a balanced audio output that accurately represents the original recording. By analyzing the frequency response, technicians can identify problem areas in the sound, apply necessary adjustments, and optimize the overall performance of the audio system in a vehicle.

Understanding frequency response is vital for effective sound system design, as it allows the technician to see how the system handles bass, midrange, and treble frequencies. Other concepts such as overall system impedance, signal distortion, and output voltage are significant in their own right but do not specifically reflect the real-time analysis of frequency response that an RTA provides when connected to speaker outputs.