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  5. X18 v4

X18 v4

3000 Watt

X18 v4

Technical Highlights

  • Power: 3000 watts RMS, Peak Power: 6000 W,
  • Impedance: Dual 1-ohm or Dual 2-ohm coil,
  • Max. Excursion: 30 mm Xmax, Motor diameter: 235 mm.
  • More technical details
€1,502.53
€1,549.99 €1,502.53
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ProductX18 v4 · D1 (2x1 Ohm)

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Impedance: D1 (2x1 Ohm)
Estimated delivery: Sep 16–Sep 21.
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Sundown Audio-X18 v4-18" (46cm) Subwoofer-masori-kaufen
€1,502.53
€1,549.99 €1,502.53

More power than X18 v4 here!

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The Sundown Audio X-18 v.4 is a Subwoofer from the Xv4 series with a diameter of 18 inches. The nominal power handling is 3000 Watts RMS, while the peak power is 6000 Watts. It is equipped with dual voice coils in 1 Ohm or 2 Ohm configurations. The high-performance motor has a diameter of 235 mm. A precision-crafted X v.4 coil stabilizes the system. The maximum excursion is 30 mm Xmax. The design is intended for operation in sealed or ported enclosures.

Features
  • 18 inches (46 cm) Subwoofer
  • Xv4 series
  • Power: 3000 Watts RMS
  • Power: 6000 Watts peak power
  • Dual 1 Ohm or Dual 2 Ohm voice coil
  • Precision-crafted X v.4 coils
  • 30 mm Xmax
  • Recommended port tuning: 32 Hz
Specifications
  • Outside diameter: 467.9 mm
  • Cutout diameter: 423.9 mm
  • Mounting depth: 381 mm
  • Motor diameter: 235 mm
  • Displacement: 7.93 liters
  • Ported enclosure volume: 198.22 liters
  • Recommended port area: 722.58 cm²
  • Vas: 93.67 liters
  • Fs: 25.87 Hz (D1) / 25.58 Hz (D2)
  • Qts: 0.54 (D1) / 0.84 (D2)
  • Qes: 0.63 (D1) / 0.55 (D2)
  • Qms: 4.13 (D1) / 4.03 (D2)
  • Re: 2.05 Ohm (D1) / 3.74 Ohm (D2)
  • Mms: 737.81 g (D1) / 656.74 g (D2)
  • BL: 19.74 NA (D1) / 26.8 NA (D2)
  • Sensitivity: 86 dB (D1) / 87 dB (D2)
  • 4th order sealed enclosure: 84.95 liters
  • 4th order ported enclosure: 254.85 liters
  • 4th order port area: 1161.29 cm²
  • 4th order port length: 203.2 mm

Frequently Asked Questions about X18 v4

What power does the Sundown Audio X-18 v.4 offer?

The Sundown Audio X-18 v.4 Subwoofer has an impressive rated power of 3000 Watts RMS. However, its performance doesn't stop there: the peak power reaches an astounding 6000 Watts. These enormous power ratings make it particularly suitable for loud and dynamic sound reproduction. Especially if you enjoy listening to music at high volumes and appreciate powerful bass, this Subwoofer is the right choice. The high wattage combined with the dual voice coils (available in 1 Ohm and 2 Ohm variants) ensures precise and stable bass reproduction, which is optimally showcased in sealed or ported enclosures.

What voice coil variants are available for the X-18 v.4?

The Sundown Audio X-18 v.4 is available with dual voice coils offered in two different Ohm configurations: 1 Ohm and 2 Ohm. These dual voice coils allow for flexible configuration depending on the requirements of your audio system. The dual 1-Ohm voice coils provide a lower impedance, which can enable higher power output and efficiency, while the 2-Ohm variant is often used for easier integration with existing amplifier systems. The precision-engineered X v.4 coils enhance the stability and performance of the entire Subwoofer system, resulting in outstanding sound reproduction.

What are the dimensions of the Sundown Audio X-18 v.4?

The Sundown Audio X-18 v.4 has a variety of specific dimensions that need to be considered when planning the installation of your sound setup. The outer diameter is 467.9 mm, which indicates space requirements and installation options. The cutout diameter is 423.9 mm, necessary for proper integration into the enclosure. The mounting depth of 381 mm sets standards for the available space and influences the installation location. Additionally, the system has a displacement of 7.93 liters, which should be factored into the dimension calculations to optimize performance.

What enclosure volumes are suitable for the X-18 v.4?

The Sundown Audio X-18 v.4 is optimized for both sealed and ported enclosures. In sealed operation, a cabinet volume of 84.95 liters is recommended, which favors compact builds and supports precise bass reproduction. For ported applications, the recommended volume is 198.22 liters to allow for deeper resonance and more powerful bass frequencies. If you choose a 4th Order Bandpass enclosure, the volume is 254.85 liters with a recommended port area of 1161.29 cm² and a port length of 203.2 mm. These specifications help you achieve optimal sound quality from the Subwoofer.

What is the maximum displacement of the Sundown Audio X-18 v.4?

The Sundown Audio X-18 v.4 features an impressive maximum displacement of 30 mm, known as Xmax. This displacement allows the Subwoofer to move large volumes of air, thereby producing strong, deep bass frequencies. If you value powerful deep bass, this is a crucial factor. The displacement is supported by the robust high-performance motor with a diameter of 235 mm, which ensures stable guidance of the diaphragm. This technical design maximizes performance in volume and sound fidelity, even under high loads and long music sessions.

What are the Thiele-Small parameters of the X-18 v.4?

For the technical assessment of the Sundown Audio X-18 v.4, the Thiele-Small parameters are essential. The resonance frequency (Fs) is 25.87 Hz for the 1-ohm version (D1) and 25.58 Hz for the 2-ohm version (D2). The Qts value, which describes the quality ratio, is 0.54 for D1 and 0.84 for D2. The Qes, which measures the electrical quality, is 0.63 for D1 and 0.55 for D2. An Mms of 737.81 g (D1) and 656.74 g (D2) indicates the moving weight, while the BL value, the magnetic force acceleration, is 19.74 NA (D1) and 26.8 NA (D2). Vas, the equivalent volume, is 93.67 liters.

What diaphragm area and frequency tuning are recommended?

The diaphragm area of the Sundown Audio X-18 v.4 is a crucial factor for the acoustic outcome. The recommended port area is 722.58 cm², which is essential for operation in a ported enclosure. The port tuning is calibrated to 32 Hz to achieve optimal deep bass reproduction and pressure development. The correct setup of the port area at the specified volume shows how the airflow around the diaphragm area is adjusted to ensure efficient music playback. When placing it in the car, you should ensure that there is sufficient space for the required port area and tuning.

How do I correctly install the X-18 v.4 in the vehicle?

When installing the Sundown Audio X-18 v.4 Subwoofer, it is essential to consider the specific dimensions to ensure optimal integration. The mounting depth of 381 mm and the outer diameter of 467.9 mm are crucial for selecting the installation location in the vehicle. A cutout diameter of 423.9 mm must also be taken into account. During installation, you should ensure that the subwoofer is securely fastened without any play, so it does not vibrate or shift during playback. Precise work during the enclosure assembly, based on the technical specifications, optimizes sound quality.

What sensitivity does the Sundown Audio X-18 v.4 offer?

The sensitivity of the Sundown Audio X-18 v.4, a critical criterion for volume development, is 86 dB for the 1-ohm version (D1) and 87 dB for the 2-ohm version (D2). These sensitivity values indicate how efficiently the subwoofer converts the amplifier input to wall speaker output. High sensitivity values are advantageous as they allow for higher volume at lower energy consumption. The dB values combined with the Xv4 series ensure that the subwoofer plays through both quiet and loud environments with clarity and presence, without overloading the amplifier.

What compatibility aspects should be considered during installation?

When installing the Sundown Audio X-18 v.4, you should consider several compatibility aspects based on the technical specifications. The outer diameters and mounting depth must be closely observed to ensure that your vehicle provides the necessary volume. Especially with unspecified car brands, flexibility through the choice of enclosure type (sealed or ported) can help correctly install the subwoofer in various cabin shapes. Due to the displacement of 7.93 liters, there should be sufficient space for the enclosure to avoid compromising sound characteristics.

Manufacturer information/responsible person

JR Labs
Rainer Jakob
Heinrich-Hertz-Straße 13 A
46325 Borken
Germany

Contact: jakobrainer@jr-labs.eu

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