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October 27 to November 2, 2026
DC Audio Level 4 15" Dual Bundle (Baltic Birch)
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order, and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 within the contiguous US. Freight items may require delivery coordination; any shipping exceptions are shown before checkout. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
How this package ships
- Two separate deliveries. Your subwoofers ship from JS Ultimate Sounds and usually arrive first.
- Separate tracking numbers. You will get one for each delivery, so a tracking link showing only part of your order is normal.
- The enclosure is built to order by Basshead Supply and ships direct from them in about 2 to 3 weeks.
- The subwoofers are not pre-installed. You mount them in the enclosure once both have arrived.
- The enclosure arrives finished in a gray stain, ready to install.
What is included
- (2) DC Audio Level 4 M4 Subwoofer 1500W RMS
- (1) DC Audio Level 4 15" Dual Ported Subwoofer Enclosure, Baltic Birch
Priced 10% below buying the subwoofers and enclosure separately.
Choose your impedance below.
DC Audio Level 4 M4 Subwoofer 1500W RMS
- 1500W RMS / 3000W Peak — a step up in SQ and heat dissipation over the m3
- 3" 8-layer flat-wound aluminum coil — on a black-anodized former for high, sustained power
- 2.5mm aluminum shorting ring + 23.5mm Xmax — reduced inductance and power compression
- Large triple-stacked motor — triple 8" progressive-roll spiders for control
- Available 10"–18", dual 1, 2 or 4 ohm — smashing lows with fantastic power handling
This Listing Includes: (2) DC Audio Level 4 M4 Subwoofers
The DC Audio Level 4 M4 steps forward in sound quality and heat dissipation over the previous m3, rated 1,500 watts RMS. A large triple-stacked motor with a 2.5mm aluminum shorting ring cuts inductance and power compression while acting as an internal heatsink, and direct-to-coil venting keeps a 3" 8-layer flat-wound aluminum coil cool through 23.5mm of Xmax. Triple 8" progressive-roll spiders and a rigid paper cone keep it linear; hand-built in the USA (7–14 day build).
Features
- 3" 8-layer flat-wound aluminum coil on black-anodized former
- 2.5mm aluminum shorting (demodulation) ring
- Large triple-stacked FEA-optimized motor
- Triple 8" OD progressive-roll spiders
- Cast aluminum frame, hand-built in the USA
Specifications
| RMS Power | 1,500W |
| Peak Power | 3,000W |
| Voice Coil | 3" 8-layer flat-wound aluminum |
| Xmax | 23.5mm |
| Cone | Non-pressed paper |
| Frame | Cast aluminum |
| Available Sizes | 10", 12", 15", 18" |
| Impedance | Dual 1, 2 or 4 Ohm |
| Build | Hand-built USA (7–14 days) |
DC Audio Level 4 15" Dual Ported Subwoofer Enclosure
- Net Volume - 7.0 cu ft
- Tuning - 32.0 Hz
- Port Area - 101.4 sq in
- Sub Cutout - 14.0"
- Construction - 3/4" (18mm) birch plywood construction
This Listing Includes: (1) Basshead Supply ported enclosure for the DC Audio Level 4 15" subwoofer
This enclosure is custom built specifically for the DC Audio Level 4 15" subwoofer. Basshead Supply's Performance Series enclosures are subwoofer-specific boxes engineered for strong, clean output, built with a refined assembly process that leaves no visible screw holes. Every box is glued with Titebond III and internally braced, then pre-wired with a recessed satin-nickel binding post and OFC 10-gauge wire - built by hand in the USA. Custom built to order by Basshead Supply and shipped directly from them, about 2 to 3 weeks.
Features
- 3/4" (18mm) birch plywood construction
- 13 ply birch veneer construction (1" Baffle 17 ply)
- Gray stained finish
- Refined assembly - no visible screw holes
- Glued with Titebond III and internally braced
- Pre-wired recessed satin-nickel binding post with OFC 10-gauge wire
- Built by hand in the USA
Specifications
| Net Volume | 7.0 cu ft |
| Tuning | 32.0 Hz |
| Port Area | 101.4 sq in |
| Port Dimensions | 19.5" x 5.2" |
| Sub Cutout | 14.0" |
| Construction | 3/4" (18mm) birch plywood construction |
| Finish | Gray stained finish |
| Wiring | Pre-wired metal binding post with 10ga OFC wire |
| Dimensions (HxWxD) | 21.0" x 40.0" x 22.2" |
