The Cobra HG S300 Dynamic External CB Speaker with Noise-Canceling Filter delivers clear receive audio in noisy trucks, Jeeps, and work vehicles. It's the best-fit upgrade for CB operators who need volume and clarity over engine and road noise. Right now it's just $17.48 at PowerHaven Outpost — 50% off the $34.95 compare-at price — and ready for fast online purchase with free shipping on orders over $45.
Specifications
- Brand: Cobra
- Model: HG S300
- Product Type: External CB communication speaker
- Power Handling: 15 watts
- Speaker: 4-inch dynamic driver with 5.5 oz. magnet
- Noise Filter: Noise-canceling filter for clear audio
- Construction: Shock-resistant housing with metal mesh grille
How to Hook Up the Cobra HG S300
Wiring Steps
Plug the HG S300's 3.5mm (1/8-inch) plug into your CB radio's external speaker jack, then mount the speaker and route the cable away from power lines. Most Cobra 29 LTD, 148 GTL, and Uniden PC78 units support this jack directly — no tools or adapters required.
Where to Mount
Popular mounting points include under the dash, on the transmission hump, or with Velcro or brackets near the driver. Facing the speaker toward you maximizes loudness; avoid blocking the grille.
If Your External Speaker Is Not Loud Enough
Check that the plug is fully seated, the radio volume is up, and the speaker is aimed at the listener. The HG S300's 15-watt handling and 5.5 oz. magnet outperform stock dash speakers for volume and clarity.
Price and Deal Value
At $17.48, this is an affordable deal on a genuine Cobra accessory — half off the $34.95 list price. Stack coupon code OUTPOST12 for an extra 12% savings at checkout, and pair with another item to clear the $45 free-shipping threshold.
Comparisons and Alternatives
Compared to the Cobra HG S100, the HG S300 adds the noise-canceling filter for clearer audio in high-noise cabs. If you don't need noise filtering, the HG S100 is the lower-cost alternative; if you do, the HG S300 is the better value at this sale price.
