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SC4a

SC4a

Technical Highlights

  • Max. input level 2-20V, RCA output up to 10V, impedance 180Ω.
  • S/N Ratio 95dB, frequency range 10-50,000Hz, dimensions 98x104x25mm.
  • Current consumption 110mA, Remote Out 12V/500mA, weight approx. 450g.
  • More technical details
€79.00
€79.00 €79.00
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ProductSC4a

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DD Audio-SC4a-High-Low Adapter-masori-kaufen
€79.00
€79.00 €79.00

The DD Audio SC4a is a high-low converter that transforms 4-channel speaker signals into high-quality RCA outputs. The SC4a features an input summing function that allows for optimal signal merging. It offers differentiated inputs for outstanding noise immunity and enables individual level control for each channel. Additionally, it is equipped with selectable ground isolation to avoid interference and has a signal sense turn-on function for easy installation. The converter combines a robust aluminum construction with full compatibility with modern OEM load-detect systems. Its dimensions are 98 mm x 104 mm x 25 mm, and it weighs approximately 450 g.

Features

  • 4-channel high-low converter for amplifiers or DSPs
  • Input signal summing for full-range output
  • Differentiated inputs for noise immunity
  • Individual level control per channel
  • Selectable ground isolation
  • Automatic signal sense turn-on function
  • Compatible with OEM load detect systems
  • Robust aluminum construction

Technical Specifications 

  • Operating voltage 10 – 16 V
  • Inputs 4x high-level (speaker)
  • Outputs 4x RCA (cinch, low-level)
  • Max. input level 2 – 20 V (high-level)
  • RCA output voltage up to 10 V
  • RCA input impedance 180 Ω
  • S/N ratio 95 dB
  • Frequency range 10 – 50,000 Hz
  • Remote out 12 V / 500 mA
  • Current consumption max. 110 mA
  • Dimensions 98 x 104 x 25 mm
  • Weight approx. 450 g

Frequently Asked Questions about SC4a

Does the DD Audio SC4a have specialized inputs for interference-free sound?

This high-low converter provides remarkable interference immunity in the audio signal thanks to differentiated 4-channel inputs. The inputs allow you to take the music signal directly from the speaker outputs and pass it on as a low-level signal. Especially if you enjoy listening to music loudly, you benefit from a clear sound image without unwanted background noise, as the integrated input signal processing ensures reliable separation between the input and output areas. The interference voltage suppression is additionally supported by the selectable ground isolation, which minimizes any ground loops. This ensures clean signal transmission, particularly in the frequency range of 10 to 50,000 Hz. So, if you want to leave nothing to chance in music playback, you achieve a stable and clearly defined performance.

What levels and voltages can this 4-channel interface handle?

The DD Audio SC4a accepts levels of 2 to 20 V at its high-level inputs, easily covering most common car radio speaker outputs. With the four separate input channels, more complex audio systems can be integrated without risking distortion at higher volumes. The outputs deliver up to 10 V RCA voltage, giving you plenty of headroom for amplifiers or DSPs with higher input requirements. Since the RCA input impedance is 180 Ω, potential signal losses are minimized. Additionally, a remote-out signal with 12 V and up to 500 mA is available, allowing connected amplifiers to be activated safely and promptly. The device requires a maximum of 110 mA in terms of power.

Does the DD Audio SC4a allow for flexible output control?

The integrated individual level control of each channel allows for very precise adjustment of the output levels. This means you can finely tune all volume levels per channel to mix different speaker components or to optimally operate your preamplifier. Additionally, the summing function ensures that all relevant frequency ranges are seamlessly combined if your source input uses a two-channel or multi-way separation. This setup is particularly advantageous in the frequency range between 10 Hz and 50 kHz, as each sound component can be amplified proportionally. This sustainably improves the sound image and achieves a balanced reproduction without tonal gaps or overlaps in the mids and highs.

What role does the automatic power-on function play in the installation?

The Signal Sense Turn-On technology of the DD Audio SC4a automatically detects when an audio signal is present at the high-level inputs. This often eliminates the need for an additional remote wire from the radio or amplifier, as the device powers on by itself as soon as music signals are detected. This practical feature saves you time and minimizes wiring effort. Even in the voltage range of 10 to 16 V operating voltage, the power-on function operates reliably. If you prefer a quick and uncomplicated setup, you will appreciate this automatic detection. Once the signal stops, the electronics recognize the absence and automatically turn off after a short delay.

Does the DD Audio SC4a support high-quality signal summation?

Thanks to the integrated input summing function, various inputs can be mixed into a continuous full-range signal. This ensures that you do not have to forgo important frequency components in multi-way systems or woofer-tweeter configurations. For example, if your factory radio outputs individual channels for bass, midrange, and treble, the converter merges these components into a comprehensive output signal. This provides a smooth frequency response that is excellent for downstream DSPs or amplifiers. Since the output signal can deliver up to 10 V to your RCA inputs, there are sufficient reserves available even in complex audio configurations to authentically unfold the sound dynamics of your entire system.

How does the selectable ground isolation affect sound quality?

The ground isolation switch on the DD Audio SC4a disconnects the ground connection from the vehicle chassis in critical configurations to prevent hum loops or interference noises. Especially in car audio systems, where different devices have various ground references, this can be one of the crucial factors in achieving a noise-free sound image. Those who need maximum silence in the signal often test several ground isolation settings in practice to find the cleanest solution. If background noise creeps in with certain configurations, switching the ground connection often helps immediately. The system operates in the frequency range between 10 and 50,000 Hz, without noticeable signal drop or loss of valuable sound components.

Does the DD Audio SC4a have a robust housing for use in vehicles?

The flat housing is made of a sturdy aluminum construction, providing the device with high stability and insensitivity to vibrations. Especially in a trunk or under a seat, there can be shocks during driving, so audio components often benefit from a reliable, resilient design. With dimensions of 98 mm x 104 mm x 25 mm, the converter also quickly finds a mounting location without disturbing the passenger area. Weighing about 450 g contributes to a secure installation, as the converter does not easily shift. Those looking for a durable audio solution rely on stable components to operate the entire system without interference.

How do I integrate this speaker signal converter into my car?

In many vehicles, the factory radio already has sufficient space behind the dashboard or in the center console, allowing you to mount the converter on its dimensions of 98 mm x 104 mm x 25 mm. Secure it carefully to prevent vibrations while driving. Make sure to connect the four high-level inputs correctly to the corresponding speaker outputs so that the signal-sense function works reliably. Additionally, the four RCA outputs are perfectly suited for downstream amplifiers or signal processors. If you need to switch the ground isolation, try different positions of the switch until you achieve a noise-free sound image. This way, you can ensure a precise installation.

Is the DD Audio SC4a suitable for sensitive music signals?

The device has a remarkably low background noise with an S/N ratio of 95 dB, which is particularly advantageous for quiet or high-resolution passages. For demanding listening environments where you want to perceive fine details, the signal can be transmitted without interference thanks to differentiated inputs and a summing function. Additionally, the individually adjustable output voltage up to 10 V ensures that even amplifiers with higher input requirements are optimally supplied. With its frequency spectrum of 10 to 50,000 Hz, this 4-channel module covers a wide listening range, ensuring that crystal sound is not lost even at high frequencies. Those who focus on precise audio processing secure a very fine signal transmission here.

What is the power consumption of this adapter?

The DD Audio SC4a requires a maximum of 110 mA, keeping the impact on the vehicle's electrical system manageable. Whether you connect it to a factory radio or a complex aftermarket head unit: thanks to the low consumption, usually no additional power amplifier needs to be planned during wiring. You can expect stable operation at a supply voltage between 10 and 16 V, so no excessive current demand arises. If you connect multiple amplifiers or DSP components, it is helpful to keep an eye on the low power consumption of the converter. The remote-out signal with 12 V and 500 mA is also sufficient to switch on additional amplifier systems without separate power supply.

Manufacturer information/responsible person

Audio Import Group
Pekka Kinnunen
Palkkitie 10
84100 Ylivieska
Finland

Contact: info@audioimport.fi

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