Description
DS18 PRO-SM8.4
The DS18 PRO-SM8 series speakers are 8-inch midrange/pro-audio speakers designed for car audio enthusiasts seeking loud, clear, and dynamic midrange performance. Constructed with a durable steel basket, high-temperature voice coil, and rigid cone design, these speakers deliver strong midrange projection with minimal distortion, even at high volumes. Ideal for doors, rear decks, or custom SPL builds, the PRO-SM8 series provides excellent vocal clarity and punchy mid frequencies for daily driver upgrades or professional competition-level systems. With high efficiency and robust construction, these speakers ensure long-lasting, reliable performance in demanding automotive audio setups.
Specifications
| Parameter | Value |
|---|---|
| Nominal Diameter | 8″ / 203.2 mm |
| Nominal Impedance | 4 Ohms |
| RMS Power Handling | 250 W |
| MAX Power Handling | 500 W |
| Sensitivity (1w/1m) | 97 dB |
| Frequency Response | 65 Hz – 12 kHz |
| Recommended Hi-Pass Crossover | 160 Hz |
| Sold | Single |
| Grill Included | No |
| Voice Coil Water Protection | No |
| Water-Resistant Rating | N/A |
Motor & Construction
| Component | Specification |
|---|---|
| Voice Coil Diameter | 1.5″ / 38.1 mm |
| Voice Coil Former Material | Kapton |
| Winding Material | CCAW |
| Cone Material | Water-Resistant Paper |
| Surround Material | Coated Cloth |
| Basket Material | Steel |
| Basket Color / Finish | Gloss Red |
| Magnet Material | Ferrite |
| Magnet Weight | 25 Oz |
Thiele & Small Parameters
| Parameter | Value |
|---|---|
| Equivalent Volume (Vas) | 24.96 L / 0.881 ft³ |
| Excursion (Xmax, one way) | 1.3 mm |
| Free Air Resonance (Fs) | 110 Hz |
| Mechanical Q (Qms) | 8.062 |
| Electrical Q (Qes) | 1.024 |
| Total Q (Qts) | 0.898 |
| Mechanical Mass (Mms) | 10.132 g |
| Mechanical Mass (w/o Air) | 9.98 g |
| Mechanical Compliance (Cms) | 0.416 mm/N |
| BL Factor | 3.027 |
| Voice Coil Inductance (Le) | 0.364 mH |
| Cone Area (Sd) | 213.82 cm² |
| DC Resistance (Re) | 3.2 Ohms |
Measurements
| Measurement | Value |
|---|---|
| Overall Diameter | 8.23″ / 209 mm |
| Overall Depth | 2.7″ / 69 mm |
| Front Mount Baffle Cutout | 7″ / 180 mm |
| Mounting Depth | 2.5″ / 63 mm |
| Motor Diameter | 4.72″ / 120 mm |
Product Overview
8″ Shallow Water-Resistant Midrange Loudspeaker
Our PRO-SM8.4 is the ultimate midrange speaker for motorcycles, powersports and off-road applications that want powerful, weather-resistant performance.
Optimized for Outdoor Performance
This 8” shallow-mount midrange speaker handles 250W RMS and 500W MAX at 4 ohms. With a wide frequency response of 65Hz–12kHz and a sensitivity of 97dB, it cuts through all noise easily.
Built to Withstand the Elements
The PRO-SM8.4 uses a water-resistant paper cone and dust cap, paired with a coated cloth surround to protect against whatever the road throws at you. At just 2.5” mounting depth and a 7” cutout diameter, it’s designed to fit tight installs without compromise.
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