Sundown Audio X18 v4 18" (46cm) Subwoofer

SKU: X-18-v-4-D1

3000 Watt

X18 v4

SKU: X-18-v-4-D1

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

€1.549,00

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Impedance: D1 (2x1 Ohm)

D1 (2x1 Ohm)
D2 (2x2 Ohm)

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X18 v4 by Sundown Audio Description

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 Subwoofer offer?

The Sundown Audio X-18 v.4 Subwoofer impresses with an RMS power of 3000 watts and a maximum peak power of 6000 watts. This high power allows for powerful reproduction of deep bass, making it ideal for use in high-performance audio systems. The stable X v.4 coils of the X-18 v.4 also enhance reliability and sound quality by ensuring a consistent power intake during intense use. Additionally, the choice between dual 1-ohm and 2-ohm voice coils provides you with the flexibility to optimize the impedance range based on the application, increasing the versatility of the subwoofer.

What enclosure recommendations are there for the Sundown Audio X-18 v.4?

The X-18 v.4 Subwoofer from Sundown Audio is suitable for both sealed and ported enclosures, with a ported enclosure of 7.00 cubic feet being optimal. It is important to note a recommended port tuning of 32 Hz to achieve the best possible bass reproduction. The recommended port area is 112 square inches. Although the sealed enclosure is generally compatible, it is not recommended as it cannot reproduce the low frequencies optimally. For 4th order enclosures, a sealed side of 3.0 cu ft and a ported side of 9.0 cu ft with 180 sq in port area is recommended.

What voice coil configurations does the X-18 v.4 offer?

The Sundown Audio X-18 v.4 offers voice coils in both configurations: dual 1-ohm and dual 2-ohm. This makes it exceptionally flexible in various setups. In audio systems with specific impedance requirements or in parallel setups, you can customize the subwoofer by selecting either the 1-ohm or 2-ohm version. The choice of voice coils affects the overall impedance, volume, and sound characteristics of the system. These customization options are particularly valuable for sound enthusiasts who want to get the most out of their hi-fi experience.

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

With an outer diameter of 18.42 inches and a cutout diameter of 16.69 inches, the X-18 v.4 Subwoofer has considerable dimensions. The mounting depth is 15 inches, which requires careful planning for the enclosure installation. Its motor diameter is a substantial 9.25 inches, contributing to its robust performance. Consider the displacement of 0.28 cubic feet to adjust the volume of the available enclosure. These dimensions make the Sundown Audio X-18 v.4 a dominant choice in the world of subwoofers for enthusiasts of impressive low frequencies.

How do the Thiele-Small parameters affect the sound of the X-18 v.4?

The Thiele-Small parameters of the X-18 v.4 provide essential insights into its acoustic performance. With a resonance frequency (Fs) of 25.87 Hz and an equivalent volume (VAS) of 93.67 liters, it shows impressive deep bass capabilities. The total Q factor (Qts) is 0.54, making it ideal for ported enclosures. A BL product of 19.74 NA indicates the magnetic strength of the voice coils, while a diaphragm mass (Mms) of 737.81 grams is an indicator of the subwoofer's oscillation capabilities. These combined parameters result in a balanced and powerful bass reproduction.

What is the mounting depth and additional space requirements of the X-18 v.4?

The complete mounting depth of the Sundown Audio X-18 v.4 is 15 inches. This significant mounting depth must be considered when planning your enclosure, as well as the motor diameter of 9.25 inches. Note a displacement of 0.28 cu ft, which affects the internal space requirement of the enclosure. Additionally, the X-18 v.4 has an outer diameter of 18.42 inches and a cutout diameter of 16.69 inches, making it quite large, which emphasizes its strong presence in your audio system. These dimensions are also crucial for a precise and efficient setup.

What level of sensitivity does the X-18 v.4 offer and how does that affect the sound?

The Sundown Audio X-18 v.4 Subwoofer has a sensitivity of 86 dB in the D1 configuration and 87 dB in the D2 version. These sensitivity values determine a specific probability distribution of sound pressure, with the D2 operating slightly more efficiently. The choice depends on the specific amplifier selection and the desired effect level. A higher sensitivity value would allow for lower drive power for the same sound pressure levels, which can be beneficial for overall performance. Thus, this technical aspect influences the volume and quality of sound reproduction.

What impact does the Xmax value of 30 mm have on the X-18 v.4?

The Xmax of the Sundown Audio X-18 v.4 is a substantial 30 mm. This generous voice coil excursion is crucial for the subwoofer's capabilities and allows for enormous diaphragm displacements without distortion. Especially if you enjoy listening to music loudly or want to experience deep bass with consistent precision, a high Xmax value is advantageous. The Xmax supports extremely low bass notes and differentiates the finest sonic details, bringing valuable musicality and driving energy to subwoofers. The X-18 v.4 utilizes these parameters to maximize both performance and quality uncompromisingly.

What are the compatibility options of the X-18 v.4 in audio systems?

The Sundown Audio X-18 v.4 Subwoofer is flexible in integrating into various audio systems thanks to its versatile scaling properties and dimensions. With its dual voice coils of 1 Ohm or 2 Ohm, it allows for adaptation to existing system impedances and amplifier configurations. When planning the installation, it is important to consider the significant mounting depth of 15 inches and the outer diameter of 18.42 inches to ensure ideal adjustments in the enclosure project. The resulting compatibility with open and closed enclosures significantly expands the installation options.

What exceptional features does the X-18 v.4 offer for extreme audio requirements?

The Sundown Audio X-18 v.4 is designed to meet extreme audio requirements, with design features expressed in the 3000 W RMS and 6000 W peak power. The X v.4 coil, manufactured for high stability, offers efficiency and reliability even with extended use. A 9.25-inch motor diameter and a massive Xmax of 30 mm allow outstanding performance in the low frequencies — ideal for bass lovers. Its port tuning of 32 Hz, diaphragm area of 113.41, and high BL force generate deep, powerful sounds. Together, these technical milestones make the X-18 v.4 a top performer in the audio spectrum.

Manufacturer information / responsible person

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

Contact: jakobrainer@jr-labs.eu