SELECT 4” 2-Way Coaxial Speaker with Grille | 40W RMS 4-Ohm
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 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 |












