SELECT 4” 2-Way Coaxial Speaker with Grille | 40W RMS 4-Ohm
Product Overview 4” 2-Way Coaxial Speaker with Grille DS18’s S40 is a compact 2-way coaxial speaker that...
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Product Overview
4” 2-Way Coaxial Speaker with Grille
DS18’s S40 is a compact 2-way coaxial speaker that brings DS18’s signature clarity in a form factor that fits nearly anywhere.
Performance in a 4-Inch Frame
With 40W RMS (120W MAX), the S40 is ideal for replacing factory speakers or building out a multi-speaker system. The integrated mylar tweeter delivers smooth high frequencies, while the woofer handles mids with power. The voice coil assembly includes ASV and EISV components for thermal stability and durability, even at louder volumes.
Tuned to Stay Tight
The S40 maintains tight response from 80Hz to 20kHz. Its mechanical design—featuring a rubber surround, black matte steel basket, and a barium ferrite magnet—helps control distortion while preserving output in small enclosures or OEM locations.
Built to Fit, Ready to Play
With a mounting depth of just 1.67", the S40 installs easily into doors, dashboards, and other tight spaces. It comes with grilles included and is ready to drop into your system without needing custom fabrication.
Make the upgrade and experience the DS18 Difference for yourself!
Key Features
- 4" 2-way coaxial speaker with integrated tweeter
- 40W RMS / 120W MAX power handling
- Frequency range: 80Hz – 20kHz
- ASV/EISV voice coil materials
- Grill included
Key Features
- 4" 2-way coaxial speaker with integrated tweeter
- 40W RMS / 120W MAX power handling
- Frequency range: 80Hz – 20kHz
- ASV/EISV voice coil materials
- Grill included
Specifications
| SKU | S40 |
|---|---|
| Nominal Diameter | 4" / 101.6mm / 1" / 25.5mm |
| Nominal Impedance | 4 Ohms |
| RMS Power Handling | 40W |
| MAX Power Handling | 120W |
| Sensitivity (1w/1m) | 85dB |
| Frequency Response | 80Hz-20KHz |
| Recommended HI Pass Crossover | 120Hz |
| Number of ways | 2 |
| Pair or Single | Pair |
| Grill Included | Yes |
| Voice Coil Diameter | 1" / 25.5mm / 0.5" / 13.25mm |
| Voice Coil Former Material | ASV / KSV |
| Winding Material | EISV / EISVM |
| Cone Material | PPI |
| Surround Material | Rubber |
| Basket Material | Steel |
| Basket Color/Finish | Black Matte |
| Magnet Material | Barium Ferrite / Neodymium |
| Magnet Weight | 5.3Oz / 150g / 1.8g |
| Equivalent Volume | 1.82L / 0.064ft3 |
| Excursion (one way) | 2.2mm |
| Free Air Resonance | 120Hz |
| Mechanical Factor | 5.677 |
| Electrical Factor | 1.911 |
| Total Factor | 1.429 |
| Mechanical Mass | 6.5g |
| Mechanical Compliance | 0.444mm/N |
| BL Factor | 2.35 |
| Voice Coil Inductance | 0.030mH |
| Cone Area | 55cm2 |
| DC Resistance | 3.7 Ohms |
| Mechanical Mass w/o air | 6g |
| Diaphragm Material | Mylar |
| Overall Diameter | 4" / 104mm |
| Overall Depth | 2.2" / 56.6mm |
| Overall Diameter (With Grill) | 5.28" / 134mm |
| Overall Depth (With Grill) | 2.73" / 69.3mm |
| Front Mount Baffle Cutout | 3.6" / 92mm |
| Mounting Depth | 1.67" / 42.5mm |
| Motor Diameter | 2.76" / 70mm |
| Tweeter Protrusion | 0.37" / 9.5mm |
Shipping
Most products ship directly from our vendor warehouses or distributor network. Shipping times can vary depending on the brand, product size, availability, and destination.
Large or oversized items such as lift kits, wheels, tires, bumpers, exhaust systems, and audio enclosures may require additional handling time or freight shipping.
If there is ever an issue with availability, shipping cost, or delivery timing, we will contact you before moving forward with the order.
Returns
Returns may be accepted on most new, unused, unopened items within 30 days of delivery. Items must be in original packaging and in resellable condition.
Installed, used, damaged, missing-parts, electrical, special-order, clearance, or custom-built items may not be eligible for return.
Return shipping is normally the customer’s responsibility unless the return is due to our mistake, such as the wrong item being shipped.
Before sending anything back, please contact Kaos Offroad so we can review the order and provide return instructions. Returns sent without approval may be refused.
Important Notes
Some products are vehicle-specific. Please verify fitment before ordering. If you are unsure, contact us with your year, make, model, sub-model, and any relevant details before purchasing.
Original shipping charges, freight charges, and vendor restocking fees may be non-refundable depending on the item and supplier policy.