Empire Ears ESR MKII vs FiR Audio Electron 12
Introduction
The Empire Ears ESR MKII and FiR Audio Electron 12 are premium IEMs designed to deliver studio-accurate, high-resolution sound. Let's compare both models so you can find the best in-ear monitors for your listening preferences.
Not the right fit? Browse other In-Ear Monitors from Empire Ears and FiR Audio.
ESR MKII vs Electron 12 Price Comparison
The ESR MKII and Electron 12 sit at two very different price points.
The ESR MKII comes in at $1,099.00.
The Electron 12 comes in at $1,799.00.
The ESR MKII costs significantly less than the Electron 12. Let's dive deep into the specs, design, sound signatures, and features of both so you can get a better idea of what each IEM brings to the table.
The Empire Ears ESR MKII
The ESR MKII is Empire Ears' studio-reference IEM. It features a five-driver hybrid setup with three BA and two Electrostatic drivers. In terms of features, the ESR MKII packs SynX, EIVEC, and A.R.C technology for enhanced sound and reliability.
Empire Ears ESR MKII Features:
- 5-driver hybrid system with 3 BA + 2 electrostatic drivers
- 4-way synX crossover with EIVEC for electrostatic integration
- A.R.C. technology to reduce resonance for cleaner sound
- Brushed Silver aluminum faceplate with ergonomic resin shell
- Includes Alpha IV UPOCC Copper Litz cable
Empire Ears ESR MKII Specs:
Driver Configuration: 3x Balanced Armature Drivers + 2x Electrostatic Drivers
Frequency Response: 10Hz - 100kHz
Sensitivity: 111dB @ 1kHz, 1mW
Crossover: 4-Way synX Crossover Network
Impedance: 3.9 Ohms @ 1kHz
The FiR Audio Electron 12
The Electron 12 is a premium in-ear monitor that combines a powerful dynamic driver with innovative Tactile Bass and SwapX technology for next-level sound and customizability.
FiR Audio Electron 12 Features:
- Single 12mm electro-dynamic driver with Tactile Bass technology
- ATOM (Air Transferring Open Module) internal venting system
- SwapX magnetic faceplates for customizable aesthetics
- Machined aluminum solid shells for durability.
- Pure silver, oxygen-free, copper-shielded cable with 4.4mm termination
FiR Audio Electron 12 Specs:
Driver Configuration: 12mm Dynamic Driver
Frequency Response: 20Hz – 20kHz.
Impedance: 16 Ω.
Isolation: -17dB
Shells: Machined Aluminum Shells with SwapX Magnetic Faceplates
Design and Build Quality
The ESR MKII and Electron 12 are premium IEMs with excellent build quality, design, and ergonomics.
The ESR MKII keeps things professional yet simple. Its medical-grade resin shell is ergonomic and lightweight, ensuring long-term comfort, while the brushed aluminum faceplate adds a subtle touch of refinement. With A.R.C. applied inside the housing, internal resonances are minimized, making the sound cleaner and more accurate.
The Electron 12 features a solid aluminum shell with customizable SwapX magnetic faceplates. The E12's shells are held together using standard screws for easy servicing when the need arises. It also features built-in ATOM venting for pressure relief and enhanced soundstage.
Sound Signature
You're probably looking to see how these IEMs stack up on sound. We'll share our thoughts here, although keep in mind this information tends to be anecdotal and subjective.
ESR MKII Sound Signature
The ESR MKII is built around accuracy and balance, making it ideal for professionals or listeners who want to hear music exactly as it’s recorded.
Its bass is tight and controlled, never overpowering the mix. The midrange is clean and transparent, bringing out vocals and instruments with lifelike clarity - perfect for mixing or critical listening. The treble is extended yet smooth, revealing subtle details without harshness, ensuring long listening sessions stay fatigue-free. This combination gives you the confidence to make precise judgments on recordings while still enjoying natural musicality.
Electron 12 Sound Signature
The FiR Audio E12 features a V-shaped tuning with powerful bass and clear treble. Bass is the highlight of the E12's sound, offering a unique tactile feel thanks to Tactile Bass technology.
The E12 works best with slow, bassy music where the powerful 12mm dynamic driver can stretch its legs. Kick drums sound weighty, powerful, and impactful, while bass guitars get remarkable detail and texture - you can feel the bass notes vibrating with every pluck of the bass guitar. The midrange and treble complement the powerful bass, offering a clear and accurate sound for vocals and instrumentals without harshness.
The soundstage is spacious. Instruments/sounds are well-separated. The E12's soundstage feels 3D-like, offering an immersive listening experience.
Price and Value
At $1,099, the ESR MKII offers tremendous value for professionals, studio engineers, or anyone who wants a reliable reference tool. Its neutral, accurate tuning gives you confidence in what you’re hearing, making it a cost-effective investment for critical work. The lightweight design and excellent isolation further enhance its practicality, delivering studio-grade performance without the premium price tag. For those who want precision sound and build, the ESR MKII delivers exactly that.
The $1,799 Electron 12 offers great value, offering exceptional sound, cutting-edge technologies, and a solid build quality. The E12's solid aluminum shells offer enhanced durability, while the SwapX faceplates allow for seamless customizability. The E12 is loaded with innovative tech as well. Tactile Bass technology elevates the bass experience for a sound you can hear and feel, while built-in ATOM venting delivers enhanced comfort by preventing pressure build-up.
Our Thoughts
The Empire Ears ESR MKII is built for those who value precision, balance, and clarity above all else. Its reference-grade tuning delivers an accurate replay with exceptional detail and separation - perfect for mixing, mastering, or critical listening. Vocals and instruments sound lifelike and accurate, giving you an honest playback of your music. Get the ESR MKII if you want studio-level neutrality and detail without fatigue.
The FiR Audio Electron 12 caters to listeners who live for energy, emotion, and impact. Its 12mm dynamic driver delivers thunderous yet controlled bass, while the ATOM venting system keeps the soundstage open and pressure-free. The E12 brings excitement and physicality to every track, making it a fun and immersive listen for modern genres. Get the Electron 12 if you want powerful, dynamic bass and a rich, engaging sound that pulls you in.
Elevate Your Listening Experience With These Related Articles
Enjoyed this article? Check out our other product comparisons!