ENGINEERED TO HEAR DEEPER

EPZ Audio Technology

EPZ Audio combines in-house DLP 3D printing, acoustic structure design, driver development, laboratory measurement, controlled manufacturing, and digital tuning tools to build repeatable IEM and DAC performance. Shell geometry, airflow, drivers, crossover design, measurement, listening, and final quality control are treated as one connected system.

Precision.
Core.
Calibration.
18+Years in acoustics and manufacturing
2020In-house DLP printing adopted
5128B&K high-frequency HATS platform
In-houseStructure, tuning, production and QC

Engineering foundation

Technology is a controlled process.

EPZ approaches audio engineering as a repeatable cycle: define the target, develop the physical system, measure prototypes, listen, refine, and carry the approved result into production.

Keeping DLP shell production, acoustic development, tuning, and quality control close to the manufacturing process helps EPZ iterate faster and protect consistency across units and batches.

From physical to digital

The EPZ technology system.

EPZ in-house DLP 3D printed IEM shell and acoustic structure
IN-HOUSE PROCESS

Precision DLP 3D printing

EPZ uses DLP-based 3D printing to produce consistent shell shapes and repeatable internal structures. This gives the engineering team more control over fit, airflow, internal volume, and complex acoustic chambers than conventional one-piece molding.

  • EPZ develops its own DLP printing process and resin materials.
  • Shell geometry, airflow, and internal volume remain part of the acoustic design.
  • In-house production supports faster iteration and more predictable fit and finish.
Explore EPZ Bespoke
EPZ hybrid IEM drivers, crossover design, and acoustic chambers
ACOUSTIC ENGINEERING

Drivers, crossovers, and acoustic paths

EPZ develops and tunes key acoustic parts, including diaphragm materials and magnetic circuit designs, then evaluates the driver, crossover, shell, and internal acoustic path as one system. The goal is controlled handoff between frequency ranges and repeatable performance across units.

  • Hybrid and tribrid systems combine dynamic, BA, planar, and PZT technologies where the target requires them.
  • Electronic and acoustic crossover design helps reduce overlap and interference.
  • Shell geometry and open or sealed cavity behavior are tuned with the driver system.
Explore P50 architecture
EPZ Acoustic Laboratory B and K Type 5128 high-frequency HATS measurement
LAB CALIBRATION

Measured, then heard

EPZ combines industry-standard measurement tools, controlled test environments, and repeated listening. Prototypes are measured through multiple iterations, adjusted toward the intended target, and verified again by ear before the design moves into production.

  • B&K Type 5128 high-frequency HATS supports repeatable measurements across the full audible frequency range.
  • Measurement guides decisions; listening confirms musical balance and real-world usability.
  • Final checks protect unit consistency and the intended tuning across production batches.
Read the EPZ story
EPZ WalkPlay PEQ DSP and browser-based audio tuning
DSP & PEQ

Software-controlled tuning

For supported products, EPZ extends tuning into software. WalkPlay on Android and browser-based Web Tuning provide access to presets, PEQ, and profile management, while products such as TP35 Pro add selectable digital filters and G20 Pro uses built-in DAC and DSP EQ.

  • Android app and browser workflows support different devices and setup preferences.
  • PEQ, saved profiles, and digital filters make tuning repeatable and adjustable.
  • Features depend on the connected EPZ product; compatibility is documented on support pages.
Open drivers and Web Tuning

Repeatable by design

From target to final QC.

Measurement is not the end of tuning, and listening is not a substitute for data. EPZ uses both throughout development, then carries the approved design into controlled production and inspection.

  1. 01

    Define the target

    Start with the listening goal, use case, fit requirements, and acoustic constraints.

  2. 02

    Build the system

    Develop drivers, crossover behavior, airflow, chambers, and shell geometry together.

  3. 03

    Measure prototypes

    Use controlled test environments and B&K Type 5128 high-frequency HATS measurements across iterations.

  4. 04

    Listen and refine

    Verify the measured target through listening, then adjust structure and tuning again.

  5. 05

    Control production

    Carry the approved design through manufacturing, unit consistency checks, and final QC.

Technology in products

Where the technology becomes audible.

Explore products and support content that demonstrate EPZ shell manufacturing, driver architecture, acoustic crossover design, measurement, DSP, and PEQ workflows.

5-DRIVER TRIBRID EPZ P50 1DD + 2BA + 2 planar drivers, a 3-way crossover, and an open-back CNC metal cavity. 4-WAY CROSSOVER EPZ P40 2 dynamic drivers, planar treble, PZT air, and electronic plus acoustic crossover control. DSP GAMING AUDIO EPZ G20 Pro An in-house 10mm LCP + PU driver with built-in DAC, DSP EQ, and saved tuning profiles. PEQ DAC / AMP EPZ TP35 Pro Dual CS43198 integration with PEQ, profile control, digital filters, and UAC 1.0 support. CUSTOM MANUFACTURING EPZ Bespoke DLP shell production, visual customization, and true custom-fit CIEM workflows. SOFTWARE SUPPORT WalkPlay & Web Tuning Official APK, browser tuning, supported Windows drivers, and setup documentation.

Technology FAQ

How EPZ technology works

Clear answers about EPZ manufacturing, acoustic development, measurement, and digital tuning.

What is EPZ DLP 3D printing?

DLP is a resin-based 3D printing process that EPZ uses in-house to control shell geometry and repeatable internal acoustic structures. It makes complex chambers practical while helping maintain fit, airflow, internal volume, and production consistency.

How does EPZ tune and measure an IEM?

EPZ develops through repeated measurement and listening. Prototypes are tested in controlled environments with tools including the B&K Type 5128 high-frequency head-and-torso simulator, adjusted toward the target, listened to again, and checked before production.

Does EPZ develop every component inside its products?

EPZ develops and tunes key acoustic parts, shell structures, crossover behavior, and complete-system performance. Some products also integrate specialist components from established suppliers. EPZ evaluates the finished driver, acoustics, shell, electronics, and tuning as one system rather than presenting every supplied component as proprietary.

Which EPZ products support DSP, PEQ, or software tuning?

Support depends on the product. TP35 Pro supports PEQ, profiles, and digital filter selection through WalkPlay or Web Tuning. USB-C gaming products such as G20 Pro use built-in DAC and DSP tuning. Check the Driver Downloads page and each product page for current compatibility.

Hear deeper

Engineering that serves the listening experience.

Technology matters when it improves fit, consistency, clarity, control, and long-term usability. EPZ connects physical manufacturing with acoustic development and digital tools so each part supports the final listening experience.

About EPZ Explore Bespoke IEMs Drivers & Web Tuning