Description
DS18 QHL2
The DS18 QHL2 is a 2‑channel lossless audio line output converter designed to seamlessly integrate aftermarket amplifiers with factory or aftermarket head units by converting high‑level speaker signals into clean, low‑level RCA preamp outputs. It features lossless transformers with noise rejection to preserve audio quality while reducing unwanted interference, and its speaker emulator ensures the source unit sees a proper load to prevent error shut‑downs. The QHL2 offers selectable auto turn‑on (audio or DC trigger) and a built‑in 12 V remote output for easy amplifier trigger control, plus level matching controls for both high and low power sources. Compact and rugged with an aluminum housing, this converter delivers up to 2.5 V preamp output with a wide frequency response from 15 Hz to 20 kHz and very low distortion, making it ideal for cleanly bridging factory and custom audio systems.
Specifications
| Parameter | Specification |
|---|---|
| SKU | QHL2 |
| Maximum Speaker Level Input | 50 W (Low Power) / 100 W (High Power) |
| Maximum Preamp Output | 2.5 V |
| Nominal Conversion Ratio | 4:1 (Low Power) / 6.5:1 (High Power) |
| Frequency Response | 15 Hz – 20 kHz |
| Total Harmonic Distortion | 0.07% (1 kHz) |
| Input Impedance | 6 Ω (Speaker Emulator) |
| Output Impedance | 600 Ω |
Features
| Feature | Specification |
|---|---|
| Speaker Level Input | Yes, 2 Channels |
| Selectable Auto Turn-On | Yes, Audio (3 V) / DC (2.5 V) |
| Remote Output | Yes, 12 V DC, 100 mA max |
| Amplifier Outputs | 2 Channels RCA (L/R) |
| Level Matching Controls | Yes (Low Power / High Power) |
| LED Indicators | Yes, ON LED indicator |
| Housing Material / Color | Aluminum / Black |
| Wiring Connector | Single Molex |
| Noise Rejection | Transformers with Galvanic Insulation |
| Step-Down Method | High-Quality Lossless Transformers |
Measurements
| Dimension | Size |
|---|---|
| Overall Length | 3.1 in / 78.7 mm |
| Overall Width | 2.4 in / 61 mm |
| Overall Height | 1.1 in / 28 mm |
| Gross Single Unit Weight | 0.36 lb / 0.16 kg |
Product Overview
Upgrade your vehicle’s sound system with DS18’s QHL2. This compact line output converter is your key to unlocking superior audio quality and seamless integration.
Engineered for those who demand nothing but the best, this 2-channel line output converter delivers pure, unfiltered sound with seamless integration into any vehicle system, whether OEM or aftermarket. Advanced transformers and cutting-edge noise rejection technology ensure that your audio remains untouched by interference. Plus, the QHL2 requires no power supply, further reducing the chance of ground feedback noise.
Installation is a breeze thanks to its compact, rugged design, complete with a detachable harness and straightforward labeling. Versatility is at its core, the QHL2’s Double-Step Down Ratio allows it to handle both high-power (6.5:1) and low-power (4:1) sources, making it the perfect companion for any setup. With built-in speaker emulation, the QHL2 guarantees flawless integration by ensuring your OEM source detects the original speaker load.
The QHL2 doesn’t just stop at superior sound—it’s smart too. The intelligent +12V remote output automatically triggers your amplifiers, with LED indicators for easy monitoring. Only the auto turn-on feature requires power, ensuring minimal impact on your vehicle’s electrical system. And with its durable aluminum housing and tear-proof wiring connector, you can trust it’s built to last.
Disclaimer: Ensure your vehicle’s electrical system operates at 12V DC with a negative ground.
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