Do You Need a DAC for Budget IEMs? A Device-by-Device Answer (2026)
A device-by-device and IEM-by-IEM answer for CHU II, Zero:2 and ZS10 Pro owners, plus three adapters and the CTIA vs OMTP mic standard to check, from the Amazon.com listings.
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Short answer: probably not a separate one. Sets like the Moondrop CHU II, 7Hz x Crinacle Zero:2 and KZ ZS10 Pro are easy to drive, and nearly any phone or laptop can run them. What you may need is a USB-C to 3.5mm adapter if your phone has no headphone jack, and that adapter already contains a small DAC. So if you keep asking “do you need a DAC for IEMs,” the useful question is whether your device has a 3.5mm port.
This guide is for new owners of an entry-level set who keep hearing “you need a DAC.” We go through it by device, then by IEM spec line, then cover three adapters worth knowing and when a pricier step up makes sense.
Still picking the IEM itself? Start with our beginner IEM guide, and the headphone buying guide covers the basics.
What a DAC actually does (and what an amp adds)
A DAC (digital-to-analog converter) turns the digital audio file or stream into an analog signal your IEMs can play. An amp raises the strength of that signal so it can drive the earphones. Every device with audio output already has both in some form: your phone, your laptop, your tablet. A separate dongle swaps in another DAC and amp, which can matter for a specific reason (no jack, a noisy port, a feature you want) but is not a requirement for sound.
What a DAC will not do is fix a poor seal or a tuning you dislike. If bass feels thin or the sound is harsh, try a different size or style of ear tip first (our ear tip guide for budget IEMs matches tips to these sets). A good seal changes what you hear far more than a converter chip does. Keep the volume moderate, and stop if the fit hurts.
Do you need a DAC for IEMs? Answer by device
USB-C iPhones (iPhone 17)
There is no headphone jack here, so a 3.5mm IEM needs an adapter. That is the whole answer for most people. The Apple adapter listed below is built for this job, and the other two dongles also work with USB-C iPhones per their listings. You are buying a way to connect, not a fix for sound. If you would rather plug straight into USB-C, our CHU II vs CHU II DSP comparison covers that route.
Android phones without a jack
Same situation: a USB-C to 3.5mm adapter gets you connected. Moondrop lists the Echo-A as working with Android without drivers, and the FiiO JA11 listing names Android phones as supported. Since phones differ, check the product page for your model if you want a specific feature like in-line controls.
Laptops and desktops with a jack
Plug your IEMs straight into the 3.5mm port and listen. If you hear hiss or electrical noise from the port, or the jack is awkward to reach, a USB dongle is a reasonable fix. Otherwise there is nothing to solve. The Echo-A and JA11 listings both say they work with computers.
Phones that still have a jack
Use it. A phone with a 3.5mm port already has a DAC and amp built in, and sets like the ones in this guide are designed to run from that kind of source. You can skip a purchase entirely.
Answer by IEM: what the numbers mean
Two numbers on a spec line matter most here: impedance (in ohms) and sensitivity (in dB). Higher sensitivity means the IEM plays louder at the same volume setting. Makers list sensitivity in different units (dB/Vrms, dB/V, or plain dB), so compare loosely rather than treating small gaps as exact.
- Moondrop CHU II: 18 ohm, 119dB/Vrms @1kHz, 3.5mm. The standard cable has no mic. Of the three, this listing shows the highest sensitivity, which points to a set that plays loud without much help.
- 7Hz x Crinacle Zero:2: 32 ohm, 108dB/V @1kHz. It comes in Without MIC, With Microphone and With Type-C Microphone variants. The listed sensitivity is lower than the CHU II’s, so expect to use more volume on the same source, though the units differ.
- KZ ZS10 Pro: 4BA+1DD hybrid, 24 ohm, 111dB, 3.5mm. Sensitivity sits between the other two on paper.
Based on the specs, none of these reads like a set that demands extra power. For headroom beyond what your phone offers, a dongle is optional, not a rule.
Adapter or dongle: our picks
Apple USB-C to 3.5mm Headphone Jack Adapter
Best for: USB-C iPhone owners who just need plain audio out.
Per the listing, this adapter connects 3.5mm headphones or speakers to USB-C devices, and it works with USB-C devices that support iOS 10 or later. It weighs about 0.6 oz, so it is easy to leave attached to a cable or keep in a pocket. The model number is MW2Q3AM/A.
For a CHU II or ZS10 Pro, the goal is simple: get the 3.5mm plug connected and listen. This adapter does that without extra software or menus.
✓ What we like
- Connects 3.5mm headphones or speakers to USB-C devices
- Works with USB-C devices that support iOS 10 or later (per listing)
- About 0.6 oz
- Nothing to configure
! Keep in mind
- The listing does not mention app EQ, mic support or in-line controls
- No listed decoding or measurement figures to compare
- Only useful if your device has a USB-C port and no jack
Skip it if: you want app EQ, mic controls you can configure, or listed technical figures.
🛒 Check price on Amazon↗ Opens Amazon.com · affiliate link, no extra cost to youFiiO JA11
Best for: Listeners who want app EQ plus mic input and CTIA/OMTP in-line controls.
The JA11 supports PCM up to 384kHz/32-bit and DSD128. It also has built-in DSP with parametric EQ in the FiiO Control app, where you can save and share presets. The housing is aluminum-magnesium and weighs about 5g, and the listing says it works with Android phones, USB-C iPhones, Windows and Mac.
The standout feature for this reader is the combination of EQ and in-line control support. If you wear a Zero:2 With Microphone variant for calls, the listing says it handles mic input and both CTIA and OMTP controls, which covers more headsets.
✓ What we like
- Parametric EQ in the FiiO Control app with save and share presets
- Mic input and CTIA/OMTP in-line controls
- PCM up to 384kHz/32-bit and DSD128
- Aluminum-magnesium housing, about 5g
- Works with Android, USB-C iPhones, Windows and Mac
! Keep in mind
- You need the app to use the EQ, which adds a step
- Mic and in-line controls work with compatible headsets, per the listing, so check your cable first
- It is still a 3.5mm dongle, so a balanced 4.4mm cable is not in play
Skip it if: you only want a plug-and-play adapter with no setup.
🛒 Check price on Amazon↗ Opens Amazon.com · affiliate link, no extra cost to youMoondrop Echo-A
Best for: Buyers who want listed THD+N and SNR figures and OMTP mic support.
The Echo-A is a 3.5mm single-ended DAC/amp with hardware decoding up to 32-bit/384kHz and an integrated audio SoC. Moondrop says it works with computers, Android and iOS without drivers, and it offers in-line control and mic support (OMTP per listing). Moondrop lists THD+N as low as 0.01% and SNR up to 100dB.
The mic standard is the part to check. OMTP is not the same as CTIA, and a headset using the other standard may not pair correctly with controls or mic. Check which standard your headset uses before buying.
✓ What we like
- Moondrop lists THD+N as low as 0.01% and SNR up to 100dB
- Hardware decoding up to 32-bit/384kHz
- Works without drivers on computers, Android and iOS
- In-line control and mic support
! Keep in mind
- Mic support is listed as OMTP, so a CTIA headset may not match
- No app EQ is listed
- Single-ended 3.5mm only
Skip it if: your headset uses CTIA controls or you want app-based EQ.
🛒 Check price on Amazon↗ Opens Amazon.com · affiliate link, no extra cost to youWhy the simple adapter wins for most people
For a new owner of a CHU II, Zero:2 or ZS10 Pro, the problem is usually “my phone has no jack.” The Apple adapter solves exactly that, with no app, no pairing and no extra features to learn. Based on the specs, these IEMs do not need extra power, so a dongle with more features does not add much to the core job.
The JA11 is worth it when you will use what it adds: parametric EQ you can save and share, or a headset with a mic where CTIA/OMTP support matters. The Echo-A is worth it if listed THD+N and SNR figures matter to you and your headset uses OMTP. Otherwise, the simple adapter does what most people need.
How to choose
- Device port: USB-C only, or a 3.5mm jack? With a jack, you may not need anything.
- Mic and in-line controls: Check whether your headset uses CTIA or OMTP. This is the easiest mistake to make. The JA11 lists both, the Echo-A lists OMTP.
- App EQ: Only the JA11 lists it among the three.
- Future 4.4mm balanced cable: If you plan to move to one, the Hidizs Martha is the option here with a 4.4mm output.
- Carrying it daily: The Apple adapter is about 0.6 oz and the JA11 about 5g, so either is easy to carry.
| Product | Output | Mic support | App EQ | Listed decoding | Best for |
|---|---|---|---|---|---|
| Apple USB-C to 3.5mm | 3.5mm | Not listed | Not listed | Not listed | Plain audio out on USB-C |
| FiiO JA11 | 3.5mm | Mic input, CTIA/OMTP controls | Yes (FiiO Control app) | PCM 384kHz/32-bit, DSD128 | EQ and mic use |
| Moondrop Echo-A | 3.5mm single-ended | In-line control and mic (OMTP per listing) | Not listed | 32-bit/384kHz | Listed THD+N and SNR figures |
| Hidizs Martha | 3.5mm and 4.4mm balanced | Not listed | Not listed | PCM 32-bit/768kHz (ES9038Q2M) | Upgrade, balanced output |
Alternatives
Lower-cost or simpler option: The 3.5mm jack you already have. If your phone, laptop or tablet has one, plug in and listen. No purchase is needed.
Upgrade option: Hidizs S9 Pro Plus Martha. It uses an ES9038Q2M chip with PCM up to 32-bit/768kHz and a volume control. The listing gives 138mW + 138mW at 32 ohm on 3.5mm and 180mW + 180mW at 32 ohm on 4.4mm balanced, and six filters are shown by RGB light. Our USB-C DAC dongle guide compares it with other dongles.
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Different need: The 7Hz x Crinacle Zero:2 in its “With Type-C Microphone” variant. It plugs into USB-C directly, so there is no adapter to carry.
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FAQ
Will a DAC make budget IEMs sound better?
Not by itself. A DAC changes how you connect and how clean the signal path is, but fit and tuning drive most of what you hear. Try different ear tips first.
Does the Apple adapter have a DAC?
Yes, a small one is built into the adapter, which is what lets a USB-C iPhone output to a 3.5mm plug. The listing describes it as connecting 3.5mm headphones or speakers to USB-C devices.
Why do I hear hiss with sensitive IEMs?
Higher-sensitivity sets play louder at the same volume, so they can reveal noise from a source that a less sensitive set would hide. Based on the specs, the CHU II lists the highest sensitivity here. A different source or dongle may help if a port is noisy.
Do I need 4.4mm?
No. These IEMs ship with 3.5mm connections per their listings. A 4.4mm balanced output only matters if you plan to move to a balanced cable, and the Hidizs Martha is the option here that offers it.
Does a dongle drain battery?
A dongle draws power from your phone, so it can use some battery. The effect depends on the phone and the dongle. Treat it as a small trade-off, not a reason to avoid one.
Can I use the same dongle on a laptop?
Often yes. The JA11 listing names Windows and Mac, and Moondrop lists the Echo-A as working with computers without drivers. If your laptop has a 3.5mm jack, you may not need one.
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