E150MR-4 5-1/2" Wide-Band Carbon Fiber Midrange Driver 4 Ohm

Quick Overview

The Dayton Audio Epique E150MR-4 is a wide-band midrange driver designed to deliver clear, fast, and controlled sound across nearly 7 octaves. Focused on low distortion and high efficiency, it uses an advanced motor design and carefully selected materials to produce clean, accurate output from 70 to 7,000 Hz. A rigid cast frame, carbon fiber cone, and effective cooling ensure stable, dependable performance, while the matching carbon fiber cone weave maintains a consistent look with other Epique drivers—making the E150MR-4 a strong choice for premium home audio systems, studio monitors, and custom loudspeaker designs.

Product Highlights

  • High-performance wide-band midrange driver covering a wide, usable frequency range from 70 to 7,000 Hz
  • 4-ohm configuration designed for high efficiency and powerful, dynamic output
  • Lightweight yet rigid carbon fiber cone with indexed cone and surround for a smooth transition minimizing diffraction
  • Advanced motor design featuring a copper cap and aluminum shorting sleeve to significantly reduce distortion
  • Titanium former paired with a solid aluminum phase plug for enhanced thermal stability and improved detail
  • Rigid cast frame that minimizes vibration and ensures stable, precise operation
  • Matching carbon fiber cone weave aligns with existing Epique drivers for seamless aesthetic continuity across multi-driver systems

Product Manuals / Spec Sheets / Downloads

Epique E150MR-4 Specification Sheet
Epique E150MR-4 3D Files
Epique E150MR-4 Mechanical Drawing

Buying Options

Epique E150MR-4 5-1/2" Wide-Band Carbon Fiber Midrange Driver 4 ohm

Side view of E150MR-4

The Dayton Audio Epique E150MR-4 Carbon Fiber Midrange Driver sets a new standard for wide-band midrange performance. Built for ultimate transparency, it is engineered with precision and premium materials to deliver exceptional clarity and consistency. The E150MR-4 pairs a lightweight, rigid carbon fiber cone with a titanium voice coil former to ensure fast transient response, low distortion, and stable operation under demanding conditions. Designed for both performance and refinement, it delivers clean, transparent midrange detail that integrates seamlessly into high-resolution loudspeaker systems.


Leave No Doubt

 
View of voice coil

Titanium is an ideal voice coil former material for a dedicated midrange driver like the Epique EC150MR-4, offering an excellent balance of strength, low mass, and thermal stability. Its rigidity maintains precise coil alignment during rapid movement, improving transient response while reducing distortion and preserving clarity. High heat tolerance and efficient thermal management reduce power compression, allowing the driver to deliver clean, detailed midrange reproduction even at higher output levels.

 
View of distortion control in the motor

The copper cap, aluminum shorting sleeve, and solid aluminum phase plug work together to enhance the performance of the Epique E150MR-4 by reducing distortion and improving clarity. The copper cap and shorting sleeve stabilize the magnetic field, lowering inductance and minimizing modulation for cleaner midrange response. The solid aluminum phase plug improves high-frequency dispersion while aiding heat dissipation, resulting in smoother, more detailed sound and consistent performance.

 
View of cone profile and index

Damped carbon fiber helps control cone resonances by absorbing unwanted vibrations, keeping the driver’s response smooth and well behaved. Indexing the cone to the surround ensures consistent mechanical alignment, promoting a uniform surface across the cone edge. Together, these design choices reduce diffraction and breakup effects, resulting in a more even frequency response and cleaner midrange detail.

 
Front view of driver

The Dayton Audio Epique family features drivers with a consistent carbon fiber weave, giving a uniform appearance across the lineup. Each driver is designed to deliver the same high-performance sound Dayton is known for, ensuring that whether in midrange, woofer, or tweeter applications, the Epique series maintains clarity, low distortion, and dynamic precision throughout any system.

Exploded rendering of the M150-4

E150MR-4 Frequency Response 0 - 60 degrees

The Dayton Audio Epique E150MR-4 delivers a smooth, well-controlled response from 100 to 7,000 Hz with efficiency above 90 dB, making it an exceptional choice for dedicated midrange applications. Its advanced carbon fiber cone and refined motor design keep resonances and breakup tightly controlled, preserving accuracy, fast transient response, and outstanding clarity where it matters most. By combining proven Epique technologies into a carefully engineered driver, the E150MR-4 takes much of the complexity out of loudspeaker design—giving you a solid foundation for achieving truly impressive results.

Side view of E150MR-4

Key Specifications:

  • Impedance: 4 Ohms
  • Re: 3.6 Ohms
  • Fs: 75 Hz
  • Qts: 0.52
  • Qes: 0.61
  • Qms: 3.62
  • SPL: 92.6 dB
  • Frequency Response: 70 - 7,000 Hz
  • Power Handling: 60W RMS

 

Speaker Series Epique
Model Number E150MR-4
Color Black
Unit of Measure Each
UPC 848791011788
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Weight 4.5 lbs.
Speaker Type Midrange
Nominal Diameter 5-1/2"
Power Handling (RMS) 60 watts
Power Handling (max) 120 watts
Impedance 4 ohms
Sensitivity 92.6 dB @ 2.83V/1m
Frequency Response 70 - 7,000 Hz
Voice Coil Diameter 30 mm
DC Resistance (Re) 3.6 ohms
Voice Coil Inductance (Le) 0.08 mH @ 1 kHz
Resonant Frequency (Fs) 75 Hz
Mechanical Q (Qms) 3.62
Electromagnetic Q (Qes) 0.61
Total Q (Qts) 0.52
Diaphragm Mass Inc. Airload (Mms) 8.5g
Mechanical Compliance of Suspension (Cms) 0.52 mm/N
Surface Area Of Cone (Sd) 100.3 cm²
Volume of Displacement (Vd) 28.3 cm³
BL Product (BL) 4.9 Tm
Compliance Equivalent Volume (Vas) 7.4 liters
Maximum Linear Excursion (Xmax) 2.7 mm
Cone / Diaphragm Material Carbon Fiber
Surround Material Rubber
Basket/Frame Material Cast Aluminum
Magnet Material Ferrite
Overall Outside Diameter 151.6 mm
Overall Depth 74.4 mm
Baffle Cutout Diameter
# Mounting Holes 4
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