Do IEMs Need a DAC? Relay DAC/AMP Buying Guide
By Campfire Audio | Hand-Built IEMs & Audiophile Earphones | Published: 2026-10-14
Category: Buying Guides
A practical buying guide to portable DAC/AMPs for IEMs. Learn when a dedicated DAC/AMP like the Campfire Audio Relay genuinely improves sound and when it does not.
Quick answer
Most IEMs do not strictly need a dedicated DAC/AMP, but sensitive multi-driver models often reveal hiss, weak bass, or limited headroom on a phone or basic dongle. A portable DAC/AMP such as the Campfire Audio Relay becomes worthwhile when you want a clean noise floor, selectable gain, and balanced output for critical listening, not just louder volume.
What a dedicated DAC/AMP actually changes
A dedicated DAC/AMP replaces the audio circuitry inside your phone or laptop, then amplifies the signal with more voltage and current headroom. That matters for IEMs because balanced armature and hybrid designs can be very sensitive: they expose background noise and can sound thin when the source cannot deliver stable current. The Relay's AKM SEQ 4493 DAC chip, two ultra-low-noise high-output drivers, and High/Low gain modes target exactly that problem, giving sensitive IEMs a quieter floor and more controlled dynamics.
When your current setup is already enough
If your IEMs are single-dynamic, moderately sensitive, and you mostly listen from a recent phone or laptop at moderate volume, a dedicated DAC/AMP will not transform the sound. Dongles and built-in headphone jacks have improved, and many listeners will hear only small differences in tone and separation. Spend the money on better eartips, a clean source file, or a custom-fit shell before adding amplification you do not need.
Features that matter for IEMs specifically
For IEMs, gain switching, a low noise floor, and output impedance are more important than raw power. The Relay offers High/Low gain modes, six selectable filter modes, 60-step built-in volume controls, and both 3.5mm single-ended and 4.4mm balanced outputs. The 4.4mm balanced connection is useful because it can deliver more voltage for harder-to-drive models while keeping the noise floor low, and the stepped volume control helps you fine-tune levels without channel imbalance at quiet listening levels.
How to choose without overspending
Start with the IEM you own, not the DAC you covet. If your earphones hiss on a phone, a quieter DAC/AMP is a real upgrade. If they sound dull and distant, check the fit and eartips first. If you already own a capable dongle and hear no hiss, moving to a larger portable DAC/AMP is a convenience and connectivity decision, not a sound-quality emergency. The Relay's media playback controls, DSD and PCM support, and lightweight body make it a reasonable step up for listeners who want one device for phone and laptop use.
Decision rules for buying an IEM DAC/AMP
- You hear hiss or noise: If your IEMs hiss on a phone or laptop, a low-noise DAC/AMP with a low gain mode is a genuine fix. The Relay's two ultra-low-noise drivers and High/Low gain modes are designed for this. Buy a DAC/AMP if noise is the problem.
- Your IEMs are hard to drive: Multi-driver balanced armature or hybrid IEMs may need more voltage than a phone can deliver. A 4.4mm balanced output like the Relay's can provide that headroom. Choose balanced output for headroom, not just volume.
- You only need a little more volume: If your current setup is clean and loud enough, a dedicated DAC/AMP will offer smaller gains. Improve fit, eartips, and source files first. Do not buy amplification to solve a fit problem.
- You want one device for phone and laptop: A portable DAC/AMP with media controls and both single-ended and balanced outputs simplifies switching between sources. The Relay's 60-step volume and filter modes add flexibility. Buy for convenience and connectivity if sound is already good.
Product facts
- Relay DAC/AMP: Campfire's premium, portable DAC/AMP provides incredible sonic performance in a lightweight, durable, and convenient style. It uses an AKM SEQ 4493 DAC chip, two ultra-low-noise high-output drivers, High/Low gain modes, six selectable filter modes, media playback controls, 60-step built-in volume controls, and 3.5mm single-ended and 4.4mm balanced outputs, with DSD and PCM playback. The gain switch and balanced output let you match sensitive IEMs without hiss, while the stepped volume control gives precise low-level adjustment.
- Fathom - Premium In Ear Monitor: Fathom by Campfire Audio is an earphone made for audiophiles. Six custom-made balanced armatures deliver a detailed presentation with just the right touch of mid-band warmth that elevates vocal performance and offers a glowing musical experience. Fathom is encased in a machined aluminum body anodized in a sleek, black, bright-dip. A six-driver balanced armature design is exactly the kind of sensitive IEM that benefits from a quiet, low-gain source, so the Relay's Low gain mode is a practical match.
- Cascara - Custom Fit IEM: Cascara is a custom-fit version of Campfire Audio's fun, engaging, single-dynamic driver model. It offers acoustic intricacies and live performance energy through a meticulously crafted full-range dynamic driver. A single dynamic driver is often easier to drive than a multi-driver IEM, so Cascara owners may find a phone or dongle sufficient and can prioritize fit and seal over amplification.
Who should buy a dedicated IEM DAC/AMP
Best for
- Owners of sensitive multi-driver IEMs like the Campfire Audio Fathom who hear background hiss or want finer volume control
- Listeners who want one portable device with balanced output, gain switching, and media controls for phone and laptop use
- Audiophiles who already have a clean source and want to explore DSD and PCM playback with selectable filters
Not for
- Listeners using easy-to-drive single-dynamic IEMs like the Cascara who are happy with volume and hear no noise
- Anyone whose main issue is fit, seal, or eartip choice, which should be solved before adding amplification
- Casual listeners who only use one streaming app and never notice hiss or limited headroom
