HiFonics ZXE15S4

The HiFonics ZXE15S4 from the popular ZEUS ZXE series is a high-performance 38 cm (15-inch) subwoofer designed to deliver powerful, dynamic, and deep bass reproduction. With a power handling capacity of 350 watts RMS and a maximum power output of 700 watts, this model is ideal for demanding car audio applications and custom-tuned subwoofer enclosures.

The powerful 56-ounce magnet assembly, combined with the generously sized 64-mm voice coil, ensures reliable power delivery. The hand-formed, specially coated paper cone offers a balanced combination of stability and light weight. A double-stitched foam surround enhances mechanical durability even during high excursion.

To ensure a robust design, HiFonics relies on a sturdy steel basket, a durable suspension, and optimized voice coil ventilation. The special pole piece design allows for large cone excursions of up to ±19 mm. The distinctive blue magnet protector rounds out the classic ZEUS design.

Thanks to its Thiele-Small parameters, the ZXE15S4 can be used in both sealed and bass-reflex enclosures. This makes the subwoofer a versatile choice for custom bass setups, delivering powerful low-frequency response and high dynamic range.

Technical Specifications

General Characteristics

• Manufacturer: HiFonics

• Model: ZXE15S4

• Series: ZEUS ZXE

• Product Type: Passive Subwoofer

• Speaker size: 38 cm (15 inches)

• Nominal impedance: 4 ohms

• Voice coils: 1 x 4 ohms (SVC)

• Frequency range: 30–300 Hz
  
  

Performance Data

• RMS power handling: 350 watts

• Maximum power handling: 700 watts

• Recommended amplifier power: 350–400 watts RMS

• Sound pressure level (1 W/1 m): 91 dB

• Sensitivity (2.83 V/1 m): approx. 94 dB
  
  

Diaphragm and Actuator

• Diaphragm material: Handmade, coated paper diaphragm

• Bead: Double-stitched foam bead

• Voice coil diameter: 64 mm

• Voice coil height: 15 mm

• Voice coil former: Aluminum

• Magnet weight: 56 oz (approx. 1.58 kg)

• Magnet type: Ferrite magnet

• Basket material: Steel

• Centering spider: Polycot

• Core ventilation: Available

• Maximum mechanical deflection: ±19 mm

• Magnet Cover: Blue ZEUS Magnet Protector
  
  

Thiele-Small parameters

• Resonance frequency (Fs): 34 Hz

• Overall Quality (Qts): 0.58

• Mechanical quality (Qms): 3.95

• Electrical quality (Qes): 0.68

• Equivalent volume (Vas): 121 liters

• DC resistance (Re): 3.6 ohms

• Effective membrane area (Sd): 844 cm²

• Moving mass (Mms): 181 g
  
  

Installation Dimensions

• Outer diameter: 395 mm

• Installation opening: 360 mm

• Installation depth: 165 mm
  
  

Case Recommendations

• Enclosed tank: approx. 60–120 liters

• Bass-reflex enclosure: approx. 90 liters net volume

• Bass reflex resonance frequency: approx. 35 Hz

• Free-air operation: Possible with proper installation
  
  

What's Included

1 x HiFonics ZXE15S4 38 cm (15") subwoofer