JL Audio C1-525x
The JL Audio C1-525x is a 5.25″ (13 cm) two-way coaxial car speaker built on the C1 philosophy: incredible performance at an unbeatable price. A DMA-optimised woofer with a mineral-filled polypropylene cone delivers loud sound with minimal distortion, while a true edge-driven aluminium dome tweeter adds crystal-clear highs. With a moderate 62 mm mounting depth and minimal tweeter protrusion, the C1-525x drops into most factory speaker locations and fits behind OEM grilles.
Key Features
- DMA-Optimised Woofer: Proprietary motor, suspension and cone modelling systems reduce distortion, improve transient performance and deliver stellar sound quality with better bass response.
- Real Aluminium Dome Tweeter: True edge-driven 19 mm (0.75″) aluminium dome tweeter with silk surround suspension creates crystal-clear sound.
- Tweeter Protection: Onboard second-order high-pass filter protects the coaxially mounted tweeter.
- Near-Universal Fit: Moderate mounting depth drops into most OEM locations and minimal tweeter protrusion (14 mm) fits behind factory grilles.
- Mineral-Filled Polypropylene Cone: Durable, well-damped cone material for smooth midrange and powerful midbass.
- Complete Mounting Kit: Supplied with eight mounting screws, eight speed clips and 0.187″ and 0.110″ female crimpable connectors.
- Sold as a Pair: Two coaxial speakers in the box.
- 2-Year Warranty: Backed by the JL Audio manufacturer warranty.
Technical Specifications
- Speaker Type: 5.25″ two-way coaxial
- Continuous Power Handling (RMS): 50 W
- Recommended Amplifier Power (RMS): 10 – 75 W per channel
- Sensitivity (SPL @ 1 W/1 m): 89 dB
- Frequency Response (+/- 3 dB): 54 Hz – 24 kHz
- Nominal Impedance: 4 Ohm
- Voice Coil Diameter: 25 mm (1″)
- Cone Material: Mineral-filled polypropylene
- Tweeter: 19 mm (0.75″) aluminium dome
- Frame Outer Diameter: 132 mm (5.83″)
- Mounting Hole Diameter: 119 mm (4.70″)
- Mounting Depth Clearance: 62 mm (2.42″)
- Motor Outer Diameter: 70 mm (2.76″)
- Frontal Tweeter Protrusion: 14 mm (0.54″)
- Speaker Connections: Spade connectors
Upgrade your factory 5.25″ speakers with the JL Audio C1-525x and enjoy loud, clean sound with genuine JL Audio engineering at an entry-level price.
















