Type-C to aux cable adapters with DAC and non-DAC connectors beside a smartphone playing music, headphones, and a car AUX port, illustrating compatibility differences between USB-C audio adapters.

Type C to Aux Cable Not Working? Here’s the Real Reason

A type c to aux cable usually stops working for one reason: it is the wrong type for your phone. These adapters come in two kinds. A DAC type has a small chip inside and works on iPhone 15 and newer, Samsung, Pixel and iPad. A passive type works only on phones that support analog audio over USB-C. In this guide I explain the difference, how to choose the right adapter and how to fix one that has gone silent. You can see our full range in the GrunX aux cable and audio adapter collection.  

How does a Type C to aux cable work?  

A Type C to aux cable converts the digital audio from your phone's USB-C port into the analog signal a 3.5mm aux jack needs. A DAC chip inside the plug does the conversion. On a few phones the phone sends analog audio itself, and the cable only passes it through.  

A USB-C port is mainly a digital port. Your headphones, car stereo and aux speaker all expect an analog signal. Something has to translate between the two, and that "something" is the difference between a cable that works and one that doesn't.  

If you want more background on how USB-C cables evolved, read our post on the evolution of the Type C cable. This article covers audio only.  

Why does an aux to C type cable work on one phone but not another?  

An aux to C type cable works on one phone and not another because passive cables need the phone to output analog audio, and most phones don't. DAC cables convert the sound themselves, so they work on far more phones. Check which type you own first.  

Here is the full comparison:  

 

DAC type 

Passive (non-DAC) type 

What is inside 

A converter chip 

Plain wires 

Needs analog output from the phone 

No 

Yes 

iPhone 15 and newer 

Works 

Does not work 

Most recent Samsung, Pixel, OnePlus, iPad 

Works 

Usually does not work 

A few older phones with analog USB-C audio 

Works 

Works 

Typical price 

Higher 

Very low 

 
This explains the confusing situation where a cheap cable works perfectly on a friend's phone and stays silent on yours. The cable is not broken. Your phone simply doesn't send analog audio, so a passive cable has nothing to pass on.  

A quick way to tell the two apart is the listing. A DAC adapter will say so, because it is a selling point. If the product page never mentions a DAC or chip and lists no specific phone models, treat it as passive.  

Which Type C to 3.5mm aux cable is compatible with iPhone 15 and newer, Samsung and Android?  

Any DAC-type Type C to 3.5mm adapter is compatible with iPhone 15 and newer, and with most Samsung, Pixel, OnePlus and Nothing phones. Passive cables are not. If your phone has no headphone jack, buy a DAC adapter and you avoid almost every compatibility problem.  

If you are shopping for a c type to aux cable, look for three things on the listing:  

  • The words "DAC" or "DAC chip"  
  • Your phone family named specifically, with iPhone 15 listed if you own one  
  • A stated warranty  

Both DAC adapters we sell are listed for iPhone 15 series, Samsung Galaxy, Google Pixel, OnePlus and Nothing phones. The Beat listing also names iPhone 16 and iPhone 17. The AUXPro lists Samsung from the S8 up to the S23 Ultra, plus Note, Z Flip, Huawei and USB-C tablets and laptops.  

Can I use an aux cable to Type C in my car?  

Yes, if your car stereo has a 3.5mm aux input. Plug the USB-C end into your phone, the 3.5mm end into the aux port, and select AUX on the stereo. Use a DAC-type adapter, because a passive cable will not work on most modern phones.  

Set the phone to about three-quarters volume and adjust loudness with the car stereo. The phone's single USB-C port carries the audio, so it cannot charge at the same time.  

An aux cable to type c setup suits drivers who want music without pairing or delay. Our full walkthrough, with a fix table for buzzing and one-sided sound, is in the Type C to aux cable for car guide.  

Does a Type C to aux cable reduce sound quality, and will calls and the mic work?  

A good DAC adapter does not noticeably reduce sound quality, because the chip and your headphones decide how it sounds. Calls work only if your headset has an in-line microphone. A plain headphone or a car aux cable has no mic, so the other person will not hear you.  

Sound quality depends mostly on the DAC chip. A well-made chip gives clear vocals and tidy bass. A very cheap one can sound thin or noisy. This is one reason a ₹100 adapter and a ₹1,999 adapter are not the same product.  

For calls, use a headset with a four-pole plug, the kind with a mic and a button on the cord. Our product listings mention in-line control and microphone use, but I always suggest making one test call after you buy any adapter, with your own headset.  

If the sound is quiet, tinny or full of hiss even though the adapter works, check the plug first. A half-inserted plug or lint in the port is a more common cause than the chip. Try different headphones too, because some low-impedance earphones sound much better than others through any adapter.  

When you test a new adapter, start with the volume low and raise it slowly.  

Which adapter should I buy if mine does not work?  

Buy a DAC-type adapter that names your phone on the listing. We sell two: the Beat for clear sound and a compact carry, and the AUXPro for daily rough use. Both cost ₹1,999 and carry a 6-month warranty.  

Both are DAC adapters, so either one fixes the compatibility problem described above. For the side-by-side comparison and who each one suits, read our Type C to aux cable buying guide. You can also open the Beat DAC adapter and the AUXPro nylon braided adapter pages directly, or browse the aux cable collection. Message us on WhatsApp with your phone model if you want a quick recommendation.  

What to do when a Type C to aux cable stops working?  

First check whether the adapter is a DAC or passive type, because a passive cable never works on an iPhone 15 or most recent Android phones. Then test your headphones elsewhere, try another phone, clean the USB-C port and check the volume. If it still fails, the cable may be faulty.  

Work through these steps in order:  

  1. Check the type. If it is passive and your phone is an iPhone 15 or a recent Android, replace it with a DAC adapter.  

  1. Test your headphones on another device. If they work there, they are fine.  

  1. Try another phone. If the adapter works on a second phone, the problem is compatibility, not a broken cable.  

  1. Clean the port and remove a thick case. Pocket lint is a common cause of crackling or a loose fit. Use a wooden toothpick gently, with the phone switched off.  

  1. Reconnect and restart. Unplug, restart your phone and plug in again. If your phone shows an accessory message, allow it.  

  1. Check volume and output. Raise the volume and make sure audio is not still going to a Bluetooth device.  

  1. No mic? Use a four-pole headset with an in-line mic.  

  1. Still silent or one-sided? The cable may be damaged. Contact us with your order details, as both adapters carry a 6-month warranty.  

If what you really want is to connect a pen drive, keyboard or mouse rather than headphones, you need an OTG adapter, not an audio adapter. Our OTG adapter guide and OTG and USB hub range cover data connections.  

Frequently asked questions

Why is my Type C to aux cable not working on my iPhone 15?  

Your adapter is almost certainly a passive type. iPhone 15 and newer send digital audio only, so they need a DAC-type adapter with a converter chip inside.  

What is the difference between a DAC and a non-DAC Type C to aux cable?  

A DAC cable has a chip that converts digital audio to analog itself. A non-DAC cable has only wires and needs the phone to supply analog audio, which most modern phones do not.  

Does a Type C to aux cable work with Samsung and Pixel phones?  

A DAC-type adapter works with most recent Samsung Galaxy and Google Pixel phones. A passive cable usually does not. Check that the listing names your phone family.  

Can I charge my phone while using a Type C to aux cable?  

Not through the same port with a basic adapter. The single USB-C port carries the audio, so charge before listening or use wireless charging if your phone supports it.  

Will the microphone work through a Type C to aux adapter?  

Yes, if your headset has an in-line mic with a four-pole plug. Headphones without a mic, and car aux cables, will not pick up your voice.  

Is a Type C to aux cable good for the car?  

Yes, if the car has a 3.5mm aux port. Use a DAC-type adapter, set the phone to about three-quarters volume and control loudness from the stereo.  

Sources of information 

Product facts in this article (price, weight, warranty, build and phone compatibility) come from the GrunX website. Both product pages were checked on 23 October 2026. 

The general explanation of DAC and passive adapters is written from standard adapter behaviour. No external website is cited.

Author Bio  

Gazanfar Ali writes about phone accessories, charging and audio for GrunX, a mobile accessories brand based in Chhatrapati Sambhajinagar (Aurangabad), Maharashtra. He focuses on explaining how everyday cables and adapters work in plain language, so buyers choose the right product the first time. Questions about this article? Message GrunX on WhatsApp at +91 99237 86655 or email hello@grunx.in

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