- Compact & Clear – 4" 2-way coaxial speakers ideal for OEM upgrades and small enclosures.
- Full-Range Output – Integrated mylar tweeter delivers clean, crisp highs.
- Strong Power Handling – 40W RMS / 120W MAX for daily use and consistent performance.
- Durable Build – Steel basket, rubber surround, and ferrite magnet for reliability.
- Easy Installation – Includes grilles and fits most factory openings.
6x9" 80W RMS 4-Ohm 3-Way Coaxial Speaker Pair DS18 SELECT Series / DS-S69
This Listing Includes:
- (2) 4" 40 Watt RMS 4-Ohm 2-Way Coaxial Speakers
- (2) Grilles
- Mounting Hardware
- User Manual
The DS18 S40 brings clear, full-range sound to tight spaces. This 4" 2-way coaxial speaker pair delivers balanced mids and crisp highs with a compact design that fits most factory and aftermarket locations.
Featuring 40W RMS / 120W MAX power handling, these speakers are ideal for upgrading stock systems or expanding multi-speaker builds. The ASV/EISV voice coil assembly provides durability and heat resistance, while the mylar tweeter ensures smooth, distortion-free highs.
A rubber surround, black matte steel basket, and barium ferrite magnet enhance mechanical control and reduce unwanted resonance. With a mounting depth of just 1.67", the S40 installs easily in doors, dashboards, and other tight-fit areas — no custom work required.
Experience reliable performance, tight response from 80Hz–20kHz, and the quality you expect from DS18.
Features:
- Compact 4" Coaxial Design – Perfect for OEM upgrades or tight-space installs.
- 2-Way Configuration – Woofer + tweeter for full-range clarity.
- 40W RMS / 120W MAX – Reliable performance at all listening levels.
- ASV/EISV Voice Coil – Built for heat resistance and long-lasting performance.
- Wide Frequency Range (80Hz–20kHz) – Balanced mids and smooth highs.
- Durable Construction – Rubber surround, PPI cone, and steel basket for longevity.
- Grilles Included – Protects the drivers while maintaining a clean appearance.
Specifications:
- Model: S40
- Nominal Diameter: 4" / 101.6mm
- 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
Woofer Specifications
- Voice Coil Diameter: 1" / 25.5mm
- Voice Coil Former Material: ASV
- Winding Material: EISV
- Cone Material: PPI
- Surround Material: Rubber
- Basket Material: Steel
- Basket Color/Finish: Black Matte
- Magnet Material: Barium Ferrite
- Magnet Weight: 5.3Oz / 150g
Thiele & Small Parameters
- Equivalent Volume (Vas): 1.82L / 0.064ft
- Excursion (Xmax): 2.2mm
- Free Air Resonance (Fs): 120Hz
- Mechanical Factor (Qms): 5.677
- Electrical Factor (Qes): 1.911
- Total Factor (Qts): 1.429
- Mechanical Mass (Mms): 6.5g
- Mechanical Compliance (Cms): 0.444mm/N
- BL Factor: 2.35
- Voice Coil Inductance (Le): 0.030mH
- Cone Area (Sd): 55cm
- DC Resistance (Re): 3.7 Ohms
Tweeter Specifications
- Nominal Diameter: 1" / 25.5mm
- Voice Coil Diameter: 0.5" / 13.25mm
- Voice Coil Former Material: KSV
- Winding Material: EISVM
- Diaphragm Material: Mylar
- Magnet Material: Neodymium
- Magnet Weight: 1.8g
Dimensions:
- 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
Accepted Payment Methods at Big Jeff Audio
At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:
Credit and Debit Cards
- Visa
- Mastercard
- American Express
- Discover
- Diners Club
Digital Wallets
- Amazon Pay
- Apple Pay
- Meta Pay (formerly Facebook Pay)
- Google Pay
- Shop Pay
- PayPal
International Payment Methods
Bank Transfers
Financing Options
We also offer financing options to make purchasing easier. Learn more about our financing options here.
- Klarna
- Affirm
- Sezzle
- Snap
- Acima
- Tiptop
If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.
Shipping Options and Delivery Time
Do You Offer Expedited Shipping?
Yes! At checkout, you can select from different shipping options:
- Standard Shipping: Free for orders over $100.
- Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.
How Long Does Delivery Take?
- Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
- Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.
What Happens If My Package Is Undeliverable?
If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.
Why Can’t I Track My Order?
If you're having trouble tracking your order:
- Make sure you’ve received the shipping confirmation email with the tracking number.
- Log into your account on our website and use the “Check Your Order Status” button.
- If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.
