Campfire Audio has been building IEMs by hand in Portland, Oregon since 2015. Ten years is not a number this industry hands out easily. Products come and go. Brands pivot. The small team in Portland kept building the same way, in the same place, with the same commitment. This is what that looks like from the inside.

The IEMs we build in Portland are used by professional musicians on stage and in the studio. Some of those musicians have worked directly with us during development, shaping the final product through professional use. Alessandro Cortini of Nine Inch Nails is one of them. This is how those partnerships work and what they produce.

Getting the most from an in-ear monitor requires more than the IEM itself. A complete musician's IEM rig involves a source, a signal path, a monitor mix, and an IEM matched to how and where you perform. This guide covers the full setup for live performance and studio use, and routes to the right Campfire Audio IEM for each context. For the case for switching from floor wedges to IEMs, see our stage monitoring guide for live performers.

In-ear monitors changed how musicians hear themselves on stage. A clean mix delivered directly to the ear canal, complete passive isolation, and zero feedback risk. We build IEMs designed for this environment: Bonneville, Ponderosa, and Clara, all hand-built in Portland, Oregon, and tuned for professional performance demands.

The source device powering your IEM shapes what you actually hear. Most IEMs perform adequately from a smartphone. High-performance multi-driver IEMs at the mid-tier and above respond to a quality DAC and amplifier in ways that are genuinely audible. This guide explains what a DAC and amplifier do, when the upgrade is worth it, and how to match your source to your IEM.

The cable connecting your IEM to a source device is not simply a wire. It is the signal path, and understanding it makes a real practical difference when choosing a source device, replacing a cable, or deciding whether an upgrade is worth considering. This guide covers the two connector standards, the main termination options, and what cable changes actually do.

IEM drivers come in four primary configurations: dynamic drivers, balanced armatures, planar magnetic drivers, and hybrid designs combining two or more types. Campfire Audio also integrates advanced technologies including bone conduction systems and electrostatic super-tweeters in flagship models. Each driver type produces a distinct sound character. Campfire Audio designs and builds IEMs across all configurations at its Portland, Oregon workshop, applying custom driver implementations and proprietary acoustic treatments at each tier.

Clara and Astrolith are both flagship IEMs hand-built in Portland, Oregon. Clara combines a dual-magnet dynamic driver with three balanced armatures in a coherent, versatile, broadly loved hybrid. Astrolith uses a dual planar configuration for a highly energetic, forward presentation that connects deeply with the listeners it is built for. Same tier, close price points, very different sounds. The choice comes down to which listening philosophy resonates with you.

Supermoon and Grand Luna both utilize planar technology and are hand-built in Portland, Oregon. Supermoon delivers a fast, energetic, V-shaped presentation from a single 14mm full-range planar driver. Grand Luna pairs a 14mm planar driver with two high-frequency balanced armatures and acoustic treatment to produce a warm, lush, and laid-back character. Both are fully realized planar IEMs. The choice is tonal character: V-shaped energy against warm, relaxed musicality.