Hi/Low adapter Connection SLI 4.3
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Connection SLI 4.3
This four-channel High/Low adapter is a reliable solution for integrating external amplifiers into factory audio systems. It converts speaker-level signals to low-level RCA signals without loss of sound quality or introduction of unwanted interference. Thanks to its compact design and advanced technologies, it is an ideal choice for upgrading car radios directly in the vehicle.
Signal conversion is carried out using high-quality transformers that preserve full bandwidth for accurate sound reproduction. Integrated STOP NOISE technology ensures effective suppression of electrical interference because the transformers provide complete galvanic isolation between the signal source and the amplifier. The result is clean signal transmission without unwanted noise, a common problem when installing additional audio equipment.
The adapter is designed with compatibility in mind for modern OEM systems, which often detect speaker presence based on impedance. Thanks to the load simulation function on all four input channels, it prevents error messages and output shutdowns of the original radio. The optional attenuation ratios High-Power (8:1) and Low-Power (4:1), adjustable independently for front and rear inputs via DIP switches, allow safe connection to standard radio outputs as well as powerful factory amplifiers with voltages up to 35V RMS.
Installation is eased by a robust shielded aluminum chassis with a clear wiring diagram on the underside and connections concentrated on one side, simplifying mounting even in tight spaces under the dashboard. The included wiring is clearly labeled and terminated with a Molex connector featuring a pull-resistant plastic strap. The adapter also supports automatic switching based on the presence of an audio signal, which works reliably even with radios without BTL output voltage, and generates a 12V Remote signal to switch connected amplifiers.
Main features
- Four-channel active converter from speaker level to low-level signal for connecting external amplifiers to factory radios.
- High-quality transformers preserving full bandwidth for distortion-free audio transmission.
- STOP NOISE technology providing galvanic isolation and effective suppression of electrical interference.
- Robust and compact shielded aluminum chassis with a wiring diagram on the underside.
- Labeled wiring terminated with a Molex connector and pull-protection.
- Independently adjustable attenuation ratios High-Power (8:1) and Low-Power (4:1) for front and rear inputs.
- Compatibility with powerful OEM sources and amplifiers with high-voltage outputs up to 35V RMS.
- Speaker load simulation on 4 input channels for trouble-free operation with OEM radios that detect impedance.
- Automatic signal-based switching compatible with radios without BTL output voltage.
- Generates a 12V output for remote switching of the amplifier.
About the brand
Connection is an Italian brand of high-quality cables, accessories, and installation materials for audio systems, operating under the renowned Elettromedia company—the same group that includes the prestigious Audison and Hertz brands. Elettromedia is a long-standing leader in the audio industry with a strong tradition of innovation and quality in the production of car audio components. The Connection brand specializes primarily in interconnect cables, power cables, speaker cables, and a broad range of accessories designed to transmit signals with maximum accuracy and no compromises. Connection combines Italian design, top-quality materials, and precise manufacturing, making it the choice for those seeking reliable and long-lasting performance for their audio systems. It is a brand synonymous with top-tier quality and technological advancement in cabling and accessories for car audio installations.
| Catalog number | 64107018 |
| Brand | Connection |
| Links | Official web presentation |