When buyers see brands like JBL using USB-C for audio, it is easy to ask a simple question:
Is the 3.5mm headphone jack going away?
For OEM headphone projects, that question is too broad. A better question is this: if a product uses USB-C for audio, what changes inside the product, and what must the buyer confirm before sampling?
USB-C is no longer only a charging port. In some headphone designs, it can also become part of wired listening, signal conversion, device compatibility, and user instructions. That does not mean every OEM buyer should remove the 3.5mm jack immediately. It means buyers need to understand what kind of audio path they are actually asking the factory to build.
JBL Shows a Shift, Not a Final Answer
JBL’s recent products show why this topic matters.
On the JBL Tune 780NC product page, the box contents include a USB Type-C to analog 3.5mm cable. That detail suggests the wired audio path is not just a traditional independent 3.5mm socket design.
JBL’s own support information gives a more important clue. For the Tune 680NC and Tune 780NC, JBL explains that audio cannot play through the 3.5mm Aux cable if the headphone battery is empty. The reason is that the connection goes from analog 3.5mm to digital USB-C, so the headphone’s internal circuit still needs power. This is explained in JBL’s support note about using the 3.5mm Aux cable when the headphones are out of battery.
That is the part OEM buyers should pay attention to.
The interface has changed, but the bigger change is inside the signal path. A cable is visible. The circuit logic is not. If the buyer only says “use Type-C instead of 3.5mm,” the factory still needs to know how audio should be handled.
JBL also has products designed directly for USB-C devices, such as the JBL Tune 520C USB-C. That model highlights USB-C compatibility and digital Hi-Res audio supported by a DSP chipset.
These examples do not prove that JBL has removed the 3.5mm jack from all products. They show something more useful for OEM projects: USB-C audio is becoming a real product design option, not just a charging feature.
The Real Issue Is Signal Path
From first principles, an audio interface only needs to answer a few basic questions.
Where does the audio signal come from? Is the signal analog or digital? Where does conversion happen? Does the headphone still need power in wired mode?
Traditional 3.5mm audio is easy to understand. The source device outputs an analog signal, and the headphone mainly turns that signal into sound. This is simple for users, and it is usually easy to explain in a product manual.
USB-C audio is different. It may carry digital audio. It may depend on a DAC. It may require device recognition. It may also need firmware, control logic, and compatibility testing.
The USB-IF USB Audio Devices documentation describes USB audio as a device function related to audio data and sound-related control, not just a connector shape. In simple terms, USB-C audio is not only about replacing one hole with another.
So the buyer should not only ask:
Can this headphone use Type-C?
A better RFQ question is:
Is the Type-C port only for charging, or does it also support audio?
That one question can change the chipset, PCB design, accessory plan, testing scope, and user instructions.
USB-C Audio Changes the Product Brief
Some buyers think removing 3.5mm makes the product cleaner and more modern. That may be true visually, but the real impact is not only appearance.
If USB-C supports audio, the product brief needs to define what kind of audio it supports. Is it USB digital audio? Is there a DAC inside the headphone or cable? Does the product support microphone input through USB-C? Will button control work on phones, tablets, laptops, and gaming devices?
These questions matter because different answers lead to different product costs and different user experiences.
Android’s documentation on USB-C to analog audio adapters also shows the background behind this shift. Some Android phones are produced without a 3.5mm jack, while users may still own 3.5mm headsets. That creates demand for USB-C audio adapters and compatibility rules.
For OEM buyers, this creates a practical decision.
If the target users mainly use newer phones, tablets, or laptops without 3.5mm ports, USB-C audio may make the product more relevant. But if the target market still uses traditional audio sources, removing 3.5mm too early can create complaints.
The right answer depends on the buyer’s channel, price range, and target device environment.
Where OEM Buyers Often Misjudge the Design
Many OEM projects treat the interface as a shell design choice.
A buyer may say, “We want to remove the 3.5mm jack and use a Type-C two-in-one port.”
This sounds clear, but it is not enough for production.
A Type-C two-in-one design can mean several different things. It may mean the Type-C port is only for charging and audio still works through Bluetooth. It may mean Type-C supports both charging and digital audio. It may also mean the product uses a USB-C to 3.5mm cable to connect with traditional audio sources.
All three can be described as Type-C designs, but they are not the same product.
The risk usually appears after sampling. The first sample may look correct from the outside, but later the buyer discovers that wired mode does not work without battery power, or that some devices do not recognize the audio function properly.
This is why interface design should be clarified before the first sample. If the buyer waits until after tooling, packaging, or mass-production preparation, the cost of changing direction becomes much higher.
What to Confirm Before Sampling
Before asking a factory to develop a USB-C audio headphone, buyers should confirm the interface logic in the RFQ stage.
| Question | Why It Matters |
|---|---|
| Is USB-C only for charging, or also for audio? | This defines the basic product architecture. |
| Is the audio signal digital or analog before conversion? | This affects the circuit design and accessory plan. |
| Where does conversion happen? | The answer may affect cost, battery use, and wired listening behavior. |
| Can wired audio work when the battery is empty? | This affects user expectation and after-sales risk. |
| Is a USB-C to 3.5mm cable required? | This affects packaging, BOM cost, and manual wording. |
| Which devices must be tested? | Phones, laptops, tablets, and gaming devices may behave differently. |
| How should the feature be explained in the manual? | Clear wording reduces confusion after shipment. |
This checklist is not meant to make buyers become engineers.
Its value is to help buyers define the product clearly enough for the factory to quote, sample, and test the correct solution.
A vague requirement such as “Type-C audio” may lead to different interpretations. A clearer requirement says whether the product needs USB digital audio, whether wired playback must work without battery power, and which devices should be part of the compatibility test.
Testing Needs to Follow the Interface
With a traditional 3.5mm jack, testing is usually more direct. The factory checks whether sound comes through, whether the channel is correct, and whether the mechanical connection is stable.
With USB-C audio, testing cannot stop at whether sound comes out.
The factory also needs to check device recognition, microphone behavior, button control, power state, and compatibility across different systems. If the product is designed for calls, the microphone path matters. If it is designed for gaming or video, latency and stability become more important.
This is the hidden cost of interface change.
USB-C may make the product look cleaner, but it can also move more responsibility into the electronic design and test plan. For OEM projects, that responsibility should be discussed early, not discovered during mass production.
What This Means for OEM Headphone Buyers
JBL’s USB-C audio direction is worth watching, but it should not be copied blindly.
Large brands make interface decisions based on their product positioning, supply chain, customer education, and ecosystem strategy. OEM buyers need a more practical filter: does this interface solve a real problem for my target customer?
For an entry-level wired headphone, USB-C may become a useful selling point if the target devices no longer keep 3.5mm ports.
For a Bluetooth ANC headphone, USB-C audio may support a more premium positioning, but only if the buyer is ready to define the signal path and test requirements.
For markets where traditional audio sources are still common, keeping 3.5mm or offering an adapter solution may be the safer choice.
The real lesson is not “remove 3.5mm because JBL is doing something with USB-C.”
The real lesson is that interface design should be part of product definition. It affects the circuit, accessories, manual, packaging, quotation, testing, and after-sales risk.
If you are planning a new OEM headphone project, define the USB-C audio requirement before sampling. Sonun can help buyers compare interface options, confirm accessory configuration, and prepare a more accurate RFQ based on the target market, product positioning, and expected usage scenario.
