Description
Experience powerful, deep, and accurate bass with the DOWN4SOUND SB-15 Subwoofer, designed for enthusiasts who demand strong low-frequency output in a versatile, durable design. Featuring a dual 4-ohm voice coil configuration and 500W RMS power handling, the SB-15 D4 delivers clean, controlled bass suitable for daily-driven systems and performance-focused builds. Its optimized suspension and robust motor structure ensure reliability and consistent performance.
Key Features
- 500W RMS power handling
- Dual 4-ohm voice coil configuration
- 2.5-inch high-temperature voice coil
- 21 mm one-way Xmax
- Highly optimized suspension
- Versatile design for a wide range of installs
Technical Specifications (T/S Parameters)
- Revc (DC Resistance): 6.130 ohm
- Resonance Frequency (Fs): 31.067 Hz
- Qms: 4.301
- Qes: 0.939
- Qts: 0.771
- Mms (Moving Mass): 277.986 g
- Cms (Compliance): 94.477 μm/N
- Rms: 0.736
- Vas: 92.878 L
- Sd: 582.958 cm²
- BL Product: 18.818 T·m
- Sensitivity (SPL): 86.6 dB
- Xmax: 21 mm
- Displacement: 0.19 cu ft
Engineering and Construction
- Optimized suspension for clean, accurate bass
- Vented motor for improved heat management
- Precision-wound 2.5-inch coil
- Durable cone and surround assembly
- Efficient motor design for controlled LF performance
Recommended Enclosures
- Ported: 3.0 cu ft (net)
- Port Area: 32 sq in
- Port Tuning: 32 Hz
- Sealed: Not recommended
Physical Dimensions
- Cutout Diameter: 13.62 in (346 mm)
- Outside Diameter: 15.51 in (394 mm)
- Mounting Depth: 7.10 in (180 mm)
- Motor Height: 3.54 in (90 mm)
- Net Weight: 45 lb
- Gross Weight: 48 lb
Why You Should Buy
- Powerful, clean bass performance
- Dual 4-ohm coils provide flexible wiring options
- Durable construction for long-term reliability
- Accurate and controlled low-frequency output
Ideal Applications
- Ported enclosures delivering deep, strong bass
- Daily drivers needing accurate LF response
- SUVs, sedans, hatchbacks, and trucks
- Users wanting high output without oversized power demands
Warranty Information
Warranty Information
Your new Down4Sound product is covered by 1 limited warranty if purchased from Down4Sound or an authorized Down4Sound dealer. This warranty does not cover improper installation, accidental damage, misuse, abuse, improper wiring, operation of unit outside of listed specifications, or any product that has been modified or repaired by anyone other than Down4Sound. Your warranty covers defects in materials and/or workmanship ONLY and is not an insurance policy. The warranty only covers the original owner of the amplifier.
All warranty returns must be accompanied by the original sales invoice or receipt. You must contact us to request an RMA number prior to sending any returns via the RMA request form on our website. You are responsible for the cost of shipping your product back to us for warranty examination. If your product is covered under warranty, shipping back to you will be at no charge to you – if your product is replaced/repaired outside of warranty you must pay for return shipping and repair bill prior to the return of the product or if no defect is found you are required to pay for return shipping only.
At the sole discretion of Down4Sound your product will be either repaired or replaced when it is being covered under warranty. In the event of shipping damage due to improper packaging on products being returned to Down4Sound the customer is liable for the cost of all damages, necessary repairs, or replacement. Be sure to properly pack your return!
* Extended additional warranty purchased on amplifiers take effect from the date of purchase and must also be stated on original sales invoice or receipt.
Refund/Return Policy: https://www.down4soundshop.com/shipping-returns/
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Additional Information
Model: |
SB |
Ohm: |
4 |
Subwoofer Size: |
15 |
Product Type: |
Subwoofer |
Subwoofer Type: |
DUAL VOICE COIL |
1 Review
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Down4Sound SB 15
i bought 2 of these for my living room, (lil overkill prolly) got a JP95t with JBL stadium 6x9, These 15s really fill the house up with bass, even at very low volume, if you cant hear it, u can feel it. haven't really had them turned up do to it all in a house and doesn't need to be that loud, But for the price and quality, i love them
