Testing RCA Interconnect Cablesįor this test, we searched our lab for easily accessible interconnect cables and set them up with our QuantAsylum QA402 and a high-quality Class-AB amplifier to measure how different designs and cable lengths would affect frequency response. We’ll dive into that discussion and include suitable testing in another article. The ability to reject unwanted electrical noise and interference is far more crucial to creating an audio system that is enjoyable. In a car audio system, cable performance at audio frequencies is a microscopically small portion of the story. Switching from an inexpensive coaxial cable to a premium twisted-pair cable with extensive shielding will produce a difference in what you hear, under very controlled conditions. We’ve participated in at least a dozen double-blind cable comparisons with our home audio friends, and there’s no doubt that differences exist. The purpose of an interconnect is to pass a low-level audio signal without affecting its amplitude (level), frequency or time (phase) characteristics. Do Different RCA Cable Designs Sound Different? Since we love a good experiment, let’s set up a number of cable designs and see if we can measure any appreciable difference in performance. If the perceived differences were huge, then one brand or design would stand out consistently. When it comes to car audio applications, very few consumers would ever consider comparing cables from different brands under properly controlled conditions. You can invest the price of a small car in wires to connect a source unit to an amplifier. Some of these creations even have batteries built into them to provide a DC bias on the conductors that is supposed to improve performance. You can choose from 3-foot coaxial cables at prices from under $5 to well over $20,000 for some of the most bespoke, story-laden offerings. If you follow any of the high-end home audio magazines or social media groups, you know that interconnect cables and the stories around them are an entire industry.
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