Sundown Audio ZV718D2 Z-Series v.7 18" Subwoofer - Dual 2-Ohm, 3.3" Voice Coil, 42mm Linear Excursion
The Sundown Audio ZV718D2 is the 18-inch, dual 2-ohm model of the Z v.7, which sits above the M and X v.4 in Sundown's 2025 ultra-high excursion subwoofer lineup. Its custom tooled, patented mega-platform frame carries a quad stacked 265mm (10.43-inch) motor with a 100mm magnet stack and a hyper-extended pole, with clearance for more than 4 inches of peak-to-peak travel before mechanical bottom. Sundown rates the motor force factor (BL^2/RE) at roughly 50% above the Z v.6.
A 3.3-inch, 4-layer round wire aluminum voice coil is wound on a thick aluminum former using Sundown's fat wire method for high power and abuse. The coil is cooled by a patent-pending airflow directing pole cap, six pole OD channels, sixteen gap vents and a cross-drilled, slotted top plate, while a 9mm magnet ID Faraday ring and pole-extension inductance sleeve give linear inductance.
The 95mm winding length allows 42mm of one-way linear excursion by 70% BL. The Z v.7 targets the lowest possible bass extension from a small ported box with very low distortion, and it works in enclosures commonly used for Sundown mega-platform subwoofers.
HIGHLIGHTS:
- Dual 2-ohm voice coils
- 42mm one-way linear excursion (70% BL)
- Quad stacked 265mm motor, 100mm magnet stack height
- 3.3-inch 4-layer round wire aluminum voice coil
- 9mm Faraday ring and pole-extension inductance sleeve
- Patented mega-platform frame
GREAT FOR:
- Ported 18-inch builds
- Very low bass extension with low distortion
- Builds using existing Sundown mega-platform boxes
SPECIFICATIONS:
| SERIES | Z-Series v.7 |
| SIZE | 18 Inch |
| IMPEDANCE | Dual 2 Ohm (DVC) |
| VOICE COIL | 3.3 Inch, 4-layer round wire aluminum |
| VOICE COIL WINDING LENGTH | 95mm |
| MOTOR | Quad stacked, 265mm (10.43 in) diameter |
| MAGNET STACK HEIGHT | 100mm (3.94 in) |
| LINEAR EXCURSION | 42mm one-way (70% BL) |
| FARADAY RING | 9mm magnet ID |
| FRAME | Patented mega-platform |
| SOLD AS | Each |
| BRAND | Sundown Audio |
| UPC | 810199220062 |
Free shipping is available within the 48 U.S. states. Orders placed before 11 PM ET are typically processed the next business day and arrive within 5–8 business days. Tracking information will be provided as soon as your order ships.
Need to make a change to your order? Contact us within 24 hours of purchase, and we'll be happy to help. Please note that orders already processed for shipment cannot be canceled.
1-Year Limited Warranty: As an authorized dealer, we provide a 1-year limited warranty covering manufacturer defects in materials and workmanship under normal use. The warranty does not cover physical damage, misuse, improper installation, or normal wear and tear.
Customer Support : 9:00 am to 5:00 pm
Email: info@eliteautogear.com
For technical support questions, contact us at cs@eliteautogear.com
Phone: (877)-215-8187
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Low End You Can Feel
Bass Built for Daily Driving and Competition
Controlled Low End
Designed for tight, repeatable bass rather than one-note boom, so basslines and kick drums stay separate.
Built to Take Power
Voice coil, spider and cone materials are matched to the rated RMS so the sub handles sustained output.
Match the Enclosure
Performance depends on the box. Sealed for accuracy, ported for output. See the specs for recommended volume and tuning.
Wire It Right
Coil configuration decides your final impedance. Match it to a load your amplifier is stable at before wiring.
