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DS18 ZXI-354 3.5" Mid-Range Loudspeaker — 120W MAX
Product Overview
Description
Key Features
- 3.5" Mid-Range
- RMS Power: 40 Watts (120 Watts Max)
- Impedance: 4 Ohm
- Barium Ferrite Magnet
- Pair ~ 86dB
Product Overview
ZXI-354
3.5" Full-Range Speaker with Kevlar Cone — 40W RMS, 4-Ohm
The ZXI-354 brings clean, distortion-resistant sound to a compact form factor — a solid full-range upgrade for dash or C-pillar locations where space is tight but clarity still matters.
A glass fiber cone paired with a rubber surround keeps bass response tight while damping unwanted vibration, and the barium ferrite magnet delivers steady, reliable output even when you're pushing volume.
Covering 120Hz–20kHz, this full-range design handles the upper midrange and highs with plenty of headroom, making it an easy drop-in for OEM speaker locations.
Free shipping on orders $100+
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Contact Us
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FAQs
Please read our FAQs page to find out more.
RMS vs. MAX power — which number do I actually care about?
RMS is what your gear handles continuously; MAX is the short burst it can survive without complaint. Match your amplifier's RMS output to your speakers' RMS rating — sizing off the MAX number is how magic smoke gets released.
What does the IP65 rating on DS18 marine gear actually mean?
It's dust-tight and rated against low-pressure water jets from any direction — built for spray, rain, and the occasional wave over the bow, not for full submersion. If something's going somewhere it could sit underwater, that's a different conversation entirely.
How do I match an amplifier to my speakers without guessing?
Add up the RMS rating of everything the amp will power, and pick an amp whose RMS output (at your speakers' impedance — usually 4-ohm) lands close to that total. Undersized is thin sound; wildly oversized is a fast way to blow a voice coil.
Can I mix marine-grade gear into a standard car audio setup, or the reverse?
You can run marine-grade gear in a car — it's just over-built for that environment, no downside besides cost. Running non-weatherproof car audio gear in an open UTV or boat is the direction that causes problems.
What gauge wiring kit do I need?
It scales with your amp's power draw and the length of the run — DS18's OFC kits come in 4-gauge and 8-gauge for a reason. Undersized wiring on a high-draw system is a voltage-drop and heat problem waiting to happen; when in doubt, size up.

