DS18’s VX2HL and VX4HL are two of the best high-to-low converter options on the market—but which one is right for your ride? Let’s break it down.
Design and Build Quality
Form and function ALWAYS come first at DS18. The VXHL’s are great examples of this principle.
Sleek and Sturdy: The VX2HL's Compact Profile
The VX2HL is all about smart design. Its sleek black ABS housing blends into any car’s interior. This 2-channel converter’s small size isn’t just for looks. It’s designed to fit into tight spaces, for those working with limited room. Plus, with built-in ventilation to keep things cool, the VX2HL ensures reliable performance even during long listening sessions.
Expanded Capabilities: The VX4HL's Versatile Build
The VX4HL takes everything great about its 2-channel counterpart and builds on it. While it shares the same sleek black ABS housing, it’s slightly larger to make room for its 4-channel setup. The extra size is minimal compared to the added functionality it brings.
Designed with versatility in mind, the VX4HL makes it easy to access all connections and controls, so setup is straightforward. Plus, its upgraded cooling system is built to handle the extra power without sacrificing reliability, keeping your audio system running smoothly.
Connectivity and Durability: A Shared Foundation
Both the VX2HL and VX4HL use dual Molex wiring connectors, making installation simple and ensuring a strong, reliable connection. The VX2HL comes with 8/4 pin connectors, while the VX4HL steps up to 12/8 pins to support its extra channels. This setup helps prevent signal loss or interference. Both converters also use advanced electronic/SMC step-down technology, which ensures top-notch signal integrity.
Performance and Specifications: Decoding the Numbers
When it comes to high-to-low converters, the devil is in the details. The VX2HL and VX4HL both have impressive specifications that cater to their specific functions.
Feature |
VX2HL |
VX4HL |
Max Speaker Level Input |
50W RMS |
50W RMS |
Max Preamp Output |
3.2V |
3.2V |
Nominal Conversion Ratio |
4:1 |
4:1 |
Frequency Response |
10Hz-30kHz |
10Hz-30kHz |
Total Harmonic Distortion |
0.02% (1kHz) |
0.02% (1kHz) |
Input Impedance |
45 ohms (Speaker Emulator) |
45 ohms (Speaker Emulator) |
Output Impedance |
2K-ohms |
2K-ohms |
S/N Ratio |
>100dB |
>100dB |
Channel Separation |
>60dB |
>60dB |
Noise Rejection |
>60dB |
>60dB |
Features and Functionalities: Beyond the Basics
While the core function of both the VX2HL and VX4HL is to convert high-level signals to low-level signals, these devices offer a range of features that set them apart from run-of-the-mill converters.

Channel Configuration: Tailored to Your Needs
- VX2HL (2-Channel): Ideal for basic stereo systems or adding a subwoofer. Features two speaker-level inputs and RCA outputs for easy amp integration.
- VX4HL (4-Channel): Perfect for advanced setups, allowing separate control over front and rear speakers or an active system with dedicated amps for highs, mids, and lows.
Auto Turn-On: Convenience Meets Intelligence
Both models detect when your head unit powers on and automatically activate amplifiers via a 3V DC trigger—no remote wire needed. This prevents unwanted pops or thumps while simplifying installation.
Remote Output: Expanding Your System's Potential
A built-in 12V DC remote output (100mA max) lets you trigger additional audio components, like signal processors or extra amplifiers. Short circuit protection (up to 10 seconds) adds extra safety.
Level Matching Controls: Fine-Tuning Your Sound
Adjustable level controls ensure balanced sound across all channels. The VX2HL offers Left/Right adjustments, while the VX4HL fine-tunes all four channels (FL/FR/RL/RR) for seamless factory integration.
Speaker Emulator Technology: Outsmarting Factory Systems
Both models prevent factory amplifiers from shutting down due to missing speakers by mimicking a speaker load, ensuring smooth operation when integrating aftermarket components.
Step-Down Method: Precision Engineering
Using advanced SMC (Surface Mount Component) technology, both units maintain signal integrity with a compact design, making installation effortless in tight spaces.
Finding Your #PerfectFit
Understanding the strengths of the VX2HL and VX4HL is crucial, but equally important is identifying which converter aligns best with your specific audio needs and setup. Let's explore various scenarios and user profiles to help you determine which model might be the ideal choice for your car audio journey.
The VX2HL: Simplicity and Efficiency
- For Stereo Lovers: Ideal for upgrading front-stage speakers with an aftermarket amp while keeping a traditional stereo setup.
- For Bass Boosters: Converts speaker outputs to RCA, making it easy to add a subwoofer without altering existing speakers.
- For Compact Car Owners: Its small size fits tight spaces, perfect for vehicles with limited installation room.
- For Budget-Friendly Upgraders: Offers great performance at an affordable price, covering essential audio needs.
The VX4HL: Versatility and Expansion
- For Surround Sound Fans: Supports a 4-channel setup for balanced front and rear speaker control.
- For Active System Builders: Allows precise tuning of tweeters, mids, and subwoofers with separate amplifiers.
- For Factory Integration Experts: Retains original sound staging and fader control when working with factory systems.
- For Future-Proofing Enthusiasts: Even if you don’t need four channels now, the VX4HL leaves room for future system upgrades.
Universal Appeal
Both models offer:
- Seamless OEM Integration – Auto turn-on and speaker emulator technology for factory head unit compatibility.
- High-Quality Sound – Low distortion, wide frequency response, and a strong signal-to-noise ratio.
- Easy Installation – Simple design and Molex connectors make DIY setup a breeze.
No matter your car audio goals, the VX2HL and VX4HL provide solid performance, flexibility, and top-tier sound quality.
Making the Right Choice for Your Audio Journey
Your decision between these two remarkable converters will ultimately hinge on your specific requirements, system complexity, and future audio aspirations:
- Choose the VX2HL if you're focused on enhancing a basic stereo system, adding a subwoofer, or working within space constraints.
- Opt for the VX4HL if you're building a complex multi-speaker setup, planning future expansions, or demand the utmost in system flexibility.
These converters provide the foundation for a truly remarkable listening experience, but the full potential of your system will depend on careful component selection, proper installation, and meticulous tuning.
Embrace the journey, experiment with different configurations, and most importantly, keep getting LOUD!