JBL Quantum 400 - Black - USB over-ear PC gaming headset with game-chat dial - Hero JBL Quantum 400 - Black - USB over-ear PC gaming headset with game-chat dial - Front JBL Quantum 400 - Black - USB over-ear PC gaming headset with game-chat dial - Detailshot 1
JBL Quantum 400 - Black - USB over-ear PC gaming headset with game-chat dial - Hero

JBL Quantum 400

Gain an audio edge. JBL Quantum 400 headset keeps you one step ahead with surround sound that engages you in the game and lets you anticipate every move. Designed for precision and immersion, JBL QuantumSOUND Signature helps you level up your performance for a real advantage in combat. JBL Quantum 400 also features a voice focus boom mic for clear multiplayer interactions, a game-chat balance dial, is certified for DISCORD, and compatible with TeamSpeak and more. A lightweight headband with memory foam ear cushions lets you game in comfort for hours on end. Up your game with JBL Quantum 400 headset and dominate your opponents.

Product Specifications

General Specifications

Driver size (mm) 50

Audio Specifications

Driver sensitivity at 1kHz/1mW (dB) 98
Dynamic frequency response range (Hz) 20 Hz - 20 kHz
Impedance (ohms) 32
Passive Frequency Response 20 Hz – 20 kHz

Dimension Specifications

Weight (g) 274
Weight (oz) 9.7
Charging Cable Length (m) 3
Charging Cable Length (ft) 9.8
Ear Cup External Height (in) 3.9
Ear Cup External Width (in) 3.5
Ear Cup Internal Height (in) 2.3
Ear Cup Internal Width (in) 1.9
Ear Cup Depth (in) 1.1
Ear Cup External Height (cm) 9.9
Ear Cup External Width (cm) 8.8
Ear Cup Internal Height (cm) 5.8
Ear Cup Internal Width (cm) 4.9
Ear Cup Depth (cm) 2.7
Audio Cable Length (ft) 3.9
Audio Cable Length (m) 1.2
Please consult the documents for in-depth specs

Documents & Downloads

Videos

What’s in the Box

  • 1 x JBL Quantum 400 headset
  • 1 x Type-C to Type-A cable
  • 1 x 3.5mm audio cable
  • 1 x Windshield foam for boom microphone
  • 1 x Quick Start Guide
  • 1 x Warranty card
  • 1 x Safety Sheet
JBL Quantum 400 - What's in the Box

FAQs & How-Tos

JBL QuantumENGINE Features
You can adjust Equalizer, Spatial Sound, RGB LED effects, change microphone settings and update the headset's firmware
Why can't your teammates hear you?
Make sure the headset volume control is turned up and your microphone is unmuted. Check that only one voice chat application is in use while in-game. If you're connected to the PC, make sure that the communication device is selected under Control Panel > Sound > Recording. Select the JBL product and select "Set as Default Device". Check on the top bar of the JBL QuantumENGINE whether your headset's game-chat balance dial is set correctly.
Non-removable microphone feature
We've intentionally designed the flip-up boom mic to stay affixed to the headset. We know from experience that losing or breaking the detachable mic is never fun. Therefore, we designed the mic to fold neatly into the headset - this design also allows the mic to automatically mute when elevated. If you're wanting a detachable mic, please check out the Quantum 100 or the Quantum ONE.
PlayStation Information
The compatibility for JBL Quantum models on PlayStation 5 is the same as it is for PlayStation 4 models. All JBL Quantum headset models work through 3.5mm audio jack (aux) connected to the PlayStation controller. USB models will also work on PlayStation. In addition, the wireless models works wirelessly when connected to the 2.4GHz USB dongle.Please note: JBL QuantumENGINE is only available on PC. Custom lighting can be set up on PC, and will carry over when connected with USB cable or 2.4GHz USB dongle. 
How RBG lighting work for console games
JBL Quantum 400 and ONE are compatible with USB C to A cable to enjoy PS4 console with RGB Lighting on, and Quantum 600 and 800 with wireless-enabled by USB dongle also gives lighting moment on PS4 console games.*NOTE that RGB will not light up when connecting with 3.5mm cable to any device (PC, Console, Mobile, etc.) because the cable doesn't have power enough for the RBG lighting.  
Mic Monitoring (side tone) Support
Yes. You can configure the volume of the mic monitoring in JBL QuantumENGINE. And the default setting of the mic monitoring is set of “OFF”.
What can you do with JBL QuantumENGINE software?
You can adjust equalizer, RGB LED effects, change microphone settings and update the headset's firmware.
Mic Monitoring Support
Yes. You can configure the volume of the mic monitoring in JBL QuantumENGINE. The default setting of the mic monitoring is "OFF”.
Why can't I hear audio from my headphones?
Make sure the headset volume control is turned up. Rotate the volume wheel on your headset to increase the volume. If you're connected to the PC via USB, check that the default device is selected under Control Panel > Sound > Playback. Select JBL Quantum 400 Game, right-click, and select "Set as Default Device".  Check on the top bar of the JBL QuantumENGINE whether your headset's game-chat balance dial is set correctly. Check the JBL Quantum 400 Game device and make sure it is not muted or turned all the way down.
Xbox Information
 All JBL Quantum headset models work only through 3.5mm audio jack (aux) connected to the Xbox controller. You cannot connect to any Xbox Series console via Bluetooth. Please note: JBL QuantumENGINE is only available on PC.  
How to set up your microphone
Ensure that only one voice chat application is in use while in-game. Be sure you hear a click when the microphone is flipped down. The microphone will only function when it is flipped down fully. If you see a red LED on the microphone, it is muted.Check that the PC is using the correct recording device.1. Go to Control Panel2. Select  Sound 3 Select  Recording4. Make sure to select the proper recording device. Right-click on it Quantum headset.Now select "Set Default Device" or "Select Default Communication Device" 5. Check the microphone levels by right-click on your Quantum headset.6. Go to Properties7. Chose Levels and adjust accordingly
7.1 Surround configuration set up guide
To configure the 7.1 Surround feature on your PC, please follow the guide below:1. In the left corner on your screen right next to the Windows logo, click on the spy-glass to start a search on your PC.2. Type in Sound --> then select Change System Sounds:  3. Make sure that your the Quantum Headphones is your Default Device for both Speakers ( Game ) and Earphone ( Communication device )4. To configure the 7.1 Surround feature, right click on the Speakers --> then select Configure Speakers5. Select 7.1 Surround and click on Next  6. Make sure that all boxes are selected, then click Next  7. Make sure both boxes are selected, and then click Next  8. Click on Finish. Now your Quantum headphones is configured for 7.1 Surround sound. The configuration will remain after rebooting PC or reconnecting headphones. Enjoy your sound experience #SoundIsSurvival #DareToListen 
How to set up your microphone
Ensure that only one voice chat application is in use while in-game. Be sure you hear a click when the microphone is flipped down. The microphone will only function when it is flipped down fully. If you see a red LED on the microphone, it is muted.How to check your PC settings for the correct recording device1. Go to Control Panel2. Select Hardware and Sound3. Click on Sound3 Select  Recording4. Make sure to select the proper recording device. Right-click on it Quantum headset. Now select "Set Default Device" or Select "Default Communication Device" 5. Check the microphone levels by right-click on your Quantum headset. Then click on Properties6. Choose Levels.7. Adjust accordingly.  Please also make sure the volume control on the headset is turned up. Rotate the volume wheel on your headset to increase the volume.Check that your headset's Game-Chat balance dial and ensure that the balance is correct, you might refer to the screenshot below from the QuantumEngine PC software.If you still cannot hear the game or music audio, or if the volume is still very low, check if the TalkThrough is activated via the QuantumEngine software.Finally, you can also do a short press on the Smart Ambient button on the headset (if your headset, has this feature)
Microphone Sound or Distortion Issues
Make sure both the QuantumENGINE software and the headset's firmware is updated to the most recent version, and that the microphone is plugged all the way in.
QUANTUM ENGINE: Software Update Release Notes
QUANTUM ENGINESoftware Update Release Notes------------------------------------------------------------------------Software Version:  V1.11.0.1511Release Date:  September 19, 2022Release Media:  Website & Quantum ENGINEWhat’s New Improved firmware stability upgrading process flow for the QUANTUM 910. ------------------------------------------------------------------------------------------------------------------------------------------------QUANTUM ENGINESoftware Update Release Notes------------------------------------------------------------------------Software Version:  V1.11.0.1510Release Date:  August 24, 2022Release Media:  Website & Quantum ENGINEWhat’s New Added support for the new QUANTUM 910 Wireless HeadphonesOver 30 improvements addressing user interface, usability, and stability of the app for a better user experience.
Why are my headphones shown as “speakers” on Windows?
The “Speaker” mode allows the JBL QuantumENGINE to receive more than two channels of audio. It also prevents some applications from adding extra signal processing intended for other headphones, which would negatively impact the performance of the JBL QuantumSURROUND or JBL QuantumSPHERE 360 technology.
How to switch between Game and Chat balance
Yes, you can adjust the game and chat audio balance by rotating the dial-up and down. When you rotate the dial, you'll feel a notch that indicates the balance is 50% game and 50% chat. The slider on Quantum ONE is different and has no notch but instead a visual indicator.
Hearing your own voice through the headphones (Sidetone feature)
To stop hearing your own voice through your headphones, please start the JBL QuantumENGINE software, navigate to the "Microphone" tab, and change the sidetone setting to 0.
Quantum Engine: Software Update Release Notes
QUANTUM ENGINE Software Update Release Notes Version 1.6.0.1053Release Date: 1/21/21  Welcome feature has been implemented. Surround Modes feature has been implemented. ANC/TT toggle has been implemented. The sidetone has been turned off by default for all models to avoid confusion. QuantumSURROUND/QuantumSPHERE quality & performance have been improved. Quantum 300 Mic Gain has been improved. Quantum 800 FW update reliability has been improved. Minor Bugs Fixed     
Supported Platforms
The JBL Quantum 400 headset is compatible via 3.5mm jack with PC, PlayStation, Xbox, Nintendo Switch, Mobile, Mac and VR.You can use the USB connection with PC, PS4, Nintendo Switch, and Mac.
Which products are supported by the JBL QuantumENGINE software?
JBL Quantum 300, 350, 400, 600, 610, 800, 810 ONE, TWS and Stream are working with the QuantumENGINE

QuantumENGINE

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