
4-Channel Lossless Audio Line Output Converter with Auto Turn-On And Speaker Emulator









4-Channel Lossless Audio Line Output Converter with Auto Turn-On And Speaker Emulator
Sale $127.46 / EACH
Reg.$149.95
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
-
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 line output converter is your key to unlocking superior audio quality and seamless integration.
Engineered for those who demand nothing but the best, this 4-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.
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 Line Output Converter with Auto Turn-On And Speaker Emulator
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- Level Matching Controls(FL,FR,RL,RR)
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- 2 Channel
- Level Matching Controls(FL,FR)
- Remote Out ~ Auto Turn On
- Speaker Emulator ~ Compact
- Step-Down Method: Electronic / SMC
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- Level Matching Controls(FL,FR)
- 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
- Line Output Converter
- 4 Channel
- Level Matching Controls(FL,FR,RL,RR)
- Remote Out ~ Auto Turn On
- Speaker Emulator ~ Compact
- Step-Down Method: Electronic / SMC
Channel:
- Line Output Converter
- 2 Channel
- Level Matching Controls(FL,FR)
- Remote Out ~ Auto Turn On
- Speaker Emulator ~ Compact
- Step-Down Method: Electronic / SMC
- Line Output Converter
- 2 Channel
- Level Matching Controls(FL,FR)
- Remote Out ~ Auto Turn On
- Speaker Emulator ~ Compact
- Step-Down Method: Electronic / SMC
Channel:
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- 2 Channel
- Level Matching Controls(FL,FR)
- Remote Out ~ Auto Turn On
- Speaker Emulator ~ Compact
- Step-Down Method: Electronic / SMC
- Line Output Converter
- 2 Channel
- Level Matching Controls(FL,FR)
- 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
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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 3652 reviewsI have many different kinds of speakers trying to find the best ones to fit me and I found them DS18. You cannot go wrong with these. 10 out of 10 recommend these to anyone wanting to upgrade Their sound system!

This amp took the already crazy loud ds18 pros an made them even louder not that they needed a amp but man they sure do get down.

It’s supper Awesome it definitely ups your speakers compared to stock unit it really improves the quality of the sound would definitely recommend this is your sign to get it!

These sound amazing with the 4in towers super loud

This fit perfect and sounds great. =The only problem I have is that is doesnt have a place for tweeters.

Been using for 3 years now. Great amp

I replaced my old and very poorly tweeter from my Markbass P210 Combo with this amazing 1" Neodymium Driver And Horn Kit 160 Watts 1.5" Polyimide 8-Ohm Vc.
I took my time to study whether this project was going to work. In order for this new driver horn to fit my bass cabinet, I had to enlarge the existing hole and when placed, I ultimately ended up using one screw because of the new position of the tweeter horn driver.
Guys, this tweeter Amazing...Highly recommended!!
Perfect sound if you are using a Fender passive J Bass or active... A MUST HAVE!!

Absolute great sound. Huge treble volume from this speaker. Love it

Este amplificador para coches es excelente, produce un Sonido muy nítido muy profesional 100% Feliz

Sounds great price is awesome!

I install these with hertz or precision power 6x9 cut kits in saddlebags. Great power handling, crystal clear sound, amazing volume, awesome tone. I'd put them up against the best from the other big names in motorcycle audio, and they always win!

Fit great in a street glide speaker box. Loud, crystal clear, take whatever power you can thow at them. I have not been able to blow a speaker. Its a no brainer, just buy them!

These are the best in the market definitely will buy again from ds18

The tweets I put in brings it all together. Affordable with quality sound.
