Zapco ASP-L2T interference filter
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Zapco ASP-L2T interference filter
Line noise on RCA has been a major problem since the beginning of the car audio industry. The RCA signal from the head unit is a very low level signal and it is relatively easy for a noise source such as the ECM or other component of the car's electrical system to enter the signal path through the RCA cables. This is even more problematic with today's very low power head units. To make matters worse, different equipment manufacturers use different methods of grounding the signal to the car's main electrical ground. If these methods do not match, they create a "ground loop" causing noise (whistling) in the signal. The Zapco ASP-L2T uses custom designed high efficiency transformers and other sound quality components to remove the direct coupling between different ground reference systems and eliminate noise without affecting the bass content of the signal and without adding distortion to the signal. The signal-to-noise ratio is over 130 dB and the THD+ noise is less than 0.1%. The signal level and impedance of the output are the same as the input, and the frequency response of the ASP-L2T even surpasses the response of the input signal from the main unit. In fact, the ASP-L2T can even be considered a "conditioner" to improve the signal from the main unit before it reaches the amplifier. The maximum power increase occurs between 500 mV and 1 volt.
About the Zapco brand
Zapco is the oldest high-end car audio brand in the world, specializing in high-end car amplifiers and DSP processors. The company was founded in the USA back in 1974 and has been collecting one award after another since then. And this both from prestigious organizations that evaluate the quality of products and innovations, as well as at global competitions focused mainly on sound quality. Zapco amplifiers represent audiophile quality without compromise, defining the standard of quality and setting the criteria by which other products in the industry are judged. At Zapco, for over 45 years, they have been constantly looking for innovative ways to bring better sound to the automotive environment, and this relentless pursuit of absolute sound quality has always resulted in new technologies and high-end products. Are you asking why? Because nothing else can capture the soul and bring tears to the eyes like music. Music can make you dance for joy..... of all the arts, music has the most powerful and immediate effect on your body and mind. Reproducing music in all its beauty and delicacy deserves nothing less than the best efforts of all Zapco employees. And also because music matters!
| Catalog number | ASP-L2T |
| Brand | Zapco |
| Links | Official web presentation (English) |