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JBL

JBL Stage3 48F Speakers

JBL Stage3 48F Speakers

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The JBL Stage3 48F is a high-performance 4-inch (100mm) 2-way coaxial car speaker designed for drop-in factory audio upgrades. Sold as a pair without grilles.

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The JBL Stage3 48F is a high-performance 4-inch (100mm) 2-way coaxial car speaker designed for drop-in factory audio upgrades. Sold as a pair without grilles, it is specifically built to mount underneath original vehicle dash or side panels where space is highly constrained.
Technical Specifications Breakdown
The speaker architecture balances high power output with drop-in factory compatibility: 
Metric Technical Value Acoustic Impact
Power Handling (RMS) 50 Watts per speaker (100W/pair) Clean continuous performance using stock radios or aftermarket amps.
Power Handling (Peak) 400 Watts per speaker (800W/pair) Handles short, sudden burst dynamics in music without cracking.
Sensitivity (@ 2.83V/1m) 89 dB Efficiently transforms power into volume; sounds loud even on weak factory head units.
Frequency Response 80Hz – 20kHz Delivers clear mid-bass through sparkling high frequencies.
Nominal Impedance 4 Ohms (True 4-Ohm Technology) Compensates for thin-gauge factory wiring to extract maximum wattage safely.
Top-Mount Depth 1.81 inches (46mm) Shallow profile tailored for tight spaces like dashboards and narrow door cavities.
Cutout Diameter 3.66 inches (93mm) Industry standard sizing for seamless drop-in placement.
Component-Level Engineering Breakdown
  • Plus One™ Woofer Cone Architecture: HARMAN’s patented cone design expands the effective vibrating surface area by up to 35% compared to competing 4" models. By pushing the surround further out toward the frame, it drives more air to produce richer, deeper mid-bass despite the small frame.
  • Laser-Etched Glass-Fiber Cone: The polypropylene cone is reinforced with 10% glass fiber. The laser-etched treatment adds structural rigidity without adding weight. This rigidity stops the cone from flexing at high volumes, eliminating muddy distortion.
  • PEI Balanced Dome Tweeters: The integrated 3/4" Polyetherimide (PEI) tweeters manage the high frequencies. PEI handles heat efficiently, reducing thermal compression and ensuring crisp, wide sound distribution across your front windshield or cabin space without becoming harsh to the ear.
  • Eco-Conscious Integration: Built with an emphasis on sustainability, the physical housing utilizes post-consumer recycled plastics, features entirely PVC-free wiring, and ships in soy-ink printed boxes.

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