
4-Channel Lossless Audio High To Low Level Converter with Auto Turn-On And Speaker Emulator









4-Channel Lossless Audio High To Low Level Converter with Auto Turn-On And Speaker Emulator
Sale $106.21 / EACH
Reg.$124.95
15% OFF FOR MOVING SALE!
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Key Features
- Line Output Converter
- 4 Channel
- Lossless Audio ~ Double Step Down Ratio
- Compact ~ Level Matching Controls(High/Low)
- Selectable Auto Turn On ~ Remote Out
- Noise Rejection ~ Speaker Emulator
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Technical Data - Manual
DOWNLOAD THE USER MANUAL
SPECS
SKU
QHL4
Maximum Speaker Level Input
50W (Low Power) / 100W (High Power)
Maximum Preamp Output
2.5V
Nominal Conversion Ratio
4:1 (Low Power) / 6.5:1 (High Power)
Frequency Response
15Hz-20KHz
Total Harmonic Distortion
0.07% (1KHz)
Input Impedance
6 ohms (Speaker Emulator)
Output Impedance
600 ohms
Features
Speaker Level Input
Yes, 4Ch
Selectable Auto Turn-On
Yes, Audio (3v) / DC (2.5v)
Remote Output
Yes, 12v DC 100mA max
Amplifier Outputs
4 Channels RCA (FL/FR/RL/RR)
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
Measurement
Overall Length
3.9" / 99mm
Overall Wide
2.4" / 61mm
Overall Height
1.1" / 28mm
Gross Single Unit Weight
0.55 Oz (0.25kg)
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Product Overview
Product Overview
DS18 QHL4 Upgrade your vehicle's sound system with DS18’s QHL4. This compact converter is your key to unlocking superior audio quality and seamless integration.
Engineered for those who demand nothing but the best, this 4-channel 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.
Installation is a breeze thanks to its compact, rugged design, complete with a detachable harness and straightforward labeling. Versatility is at its core, effortlessly handling both high-power (up to 100W) and low-power sources, making it the perfect companion for any setup. With built-in speaker simulation, the QHL4 guarantees flawless integration by ensuring your OEM source detects the original speaker load.
The QHL4 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. 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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4-Channel Lossless Audio High To Low Level Converter with Auto Turn-On And Speaker Emulator
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- Remote Out ~ Auto Turn On
- Speaker Emulator ~ Compact
- Step-Down Method: Electronic / SMC
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- 4 Channel
- Level Matching Controls(FL,FR,RL,RR)
- Remote Out ~ Auto Turn On
- Speaker Emulator ~ Compact
- Step-Down Method: Electronic / SMC
Let customers speak for us
from 3532 reviewsCurrently running four of these on all doors and it bangs and is way more louder and clearer than what I thought it was going to be. 10/10 definitely will return to ds18s for more stuff in the future

Very loud

The best single din I’ve ever used, love that you can use the app to tune to your liking as well as change the led colors to whatever you like. So many useful settings and would definitely fit in almost any car.

Great product and service.
Easy install and sounds great.
DS18 , could I get a few stickers to rep on the sling by chance? 🤘

The best loaded enclosure!
I bought the single loaded zxi12 and this is the best loaded box I have found to date. It is tuned nice and low, the sub has very impressive excursion to keep air moving down in the 20's. I will be selling off my other subs and exploring Ds18 brand for the foreseeable future. Excellent product! No buyers remorse here

I bought the single loaded zxi12 and this is the best loaded box I have found to date. It is tuned nice and low, the sub has very impressive excursion to keep air moving down in the 20's. I will be selling off my other subs and exploring Ds18 brand for the foreseeable future. Excellent product! No buyers remorse here!

Sound quality is top notch! Nice loud and crisp! Paired it with my skar 1000x4 and couldn't be happier! Upgraded from my pioneer 6x9s.

Love the amp does extremely well on my Harley.

Love product

The dsp is great, it works absolutely perfect, it tunes the frequencies to the “T”. Couldn’t get a better sound.

It works amazingly, one of my best purchases absolutely pushes my speakers to its max.

I love the way they sound, super loud and clear, def will get some more soon.

So far so good I'm pretty happy with the sound and quality of your speakers ...gotta say that I reluctant to buy them because of the fairly cheap cost but am more than satisfied. Let's see how they hold up🤞🤞

Ultimate compatibility with the DS18 6.5" and 8 " mid range speakers.
