JL Audio C7-350cm C7 Series 3.5" 9cm Car Component Midrange Speaker 100w RMS
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The JL Audio C7-350cm is a 3.5" (90 mm) component midrange speaker, rated at 100W RMS (200W peak) at 4 ohms, from JL Audio's flagship C7 Series. It is sold individually and designed for active 3-way systems.
Key specifications
- Type: 3.5" (90 mm) component midrange, sold singly
- Power handling: 100W RMS, 200W peak
- Recommended amplifier power: 50–150W RMS per channel
- Impedance: 4 ohm
- Frequency response: 300 Hz – 10 kHz (±3 dB)
- Voice coil: 36 mm (1.42") overhung, copper-clad aluminium wire on fiberglass former
- Magnet: neodymium, U-Yoke motor
- Crossover: not included — designed for active systems
- Grille: cast-alloy grille tray with fine mesh and spiral steel inserts
C7-350cm 3.5" (90 mm) component midrange, single, with grille
C7 is JL Audio's flagship automotive loudspeaker range, built using their most advanced development tools and precision manufacturing processes.
The C7-350cm is designed to operate in a 3-way system alongside a woofer and tweeter. It delivers clear, natural midrange reproduction with strong transient response and low distortion, achieved through careful optimisation of motor and suspension behaviour. No passive crossover is included. For the mid-bass driver in a C7 3-way front stage, see the JL Audio C7-650cw 6.5" component woofer.
C7 drivers are designed for active systems. JL Audio recommend pairing them with a high-quality tuning DSP — such as the JL Audio TwK™ 88 or D8 — and a dedicated amplifier channel per driver. Precise configuration of equalisation, delay and crossover filters is required for optimal in-vehicle performance.
C7-350cm design notes
Cone and dust cap: The cone is vacuum-formed from mineral-filled polypropylene for good damping and low mass, with a curvilinear profile to optimise response. A concave dust cap improves high-frequency behaviour.
Suspension: The moving assembly uses a linear-profile spider formed from a Nomex®/polycotton blend and a positive-roll rubber surround. Together these provide controlled damping without restricting excursion.
Motor: A high-grade neodymium magnet and a specially machined U-Yoke motor topology are used. Motor magnetics are optimised via advanced FEA tools to reduce distortion and maintain linear motor force throughout the performance range.
Voice coil: A 36 mm (1.42") overhung voice coil is wound with copper-clad aluminium wire onto a fiberglass former. The oversized coil extends power handling and minimises thermal compression at higher levels.
Chassis: A purpose-engineered cast alloy basket features thin spokes to maximise rear open area.
Design bandwidth
- With 48 dB/octave filters: 300 Hz – 10 kHz
- With 24 dB/octave filters: 400 Hz – 10 kHz
- With 12 dB/octave filters: 500 Hz – 10 kHz
Built in USA with global components.
Sold individually, with a cast-alloy grille tray, one fine mesh steel grille insert and one spiral steel grille insert.
Explore the full range in JL Audio C7 Speakers.
Specification
| Frequency Response | 300 Hz - 10 KHz ± 3 dB |
|---|---|
More specs
| |
What's Included
- C7-350cm
- Cast-alloy grille tray
- Fine mesh steel grille insert
- Spiral steel grille insert
JL Audio
About the JL Audio C7-350CM
From our tech experts at CEN
A JL Audio C7 Series midrange driver, 3.5 inch, handling 100w RMS.
Who it suits
Drivers building a multi-way active front stage, where each driver covers a defined band and a processor sets the crossover points. C7 is the top of the car range, intended for active systems and serious amplification.
Our tech experts advise
Drivers like this are part of a system rather than a straight swap: they assume amplification and processing, and the crossover points matter as much as the hardware. get in touch and we will help specify the whole front stage. See car audio installation.
Explore the full JL Audio range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all JL Audio
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Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
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Frequently Asked Questions
Q: Will these speakers fit my car?
A: Most car speakers are standard sizes, but mounting depth and fitting rings vary by vehicle. Check the size in the Specification tab against your vehicle, or contact CEN with your registration and we will confirm fitment and any adapters or fitting kits you need.
Q: Do I need an amplifier to run these speakers?
A: Not always. Most speakers will run from a standard head unit, but a dedicated amplifier lets them perform at their best, particularly for component sets and higher power handling models. The RMS figure in the Specification tab is the guide to how much clean power they can use.
Q: What is the difference between coaxial and component speakers?
A: Coaxial speakers combine the tweeter and woofer in one unit for a simple like-for-like upgrade. Component sets separate the tweeter and woofer with a crossover for better imaging and detail, and suit installs where sound quality is the priority.
Q: Do these come as a pair?
A: Unless stated otherwise, car speakers are sold in pairs. Check the product title and What's Included tab, which lists exactly what is in the box.
Q: Can CEN fit these speakers for me?
A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
Q: Is the JL Audio C7-350cm sold as a pair?
A: No. The C7-350cm is sold individually, with a cast-alloy grille tray, one fine mesh steel grille insert and one spiral steel grille insert. Order two for a left and right pair.
Q: Does the C7-350cm come with a crossover?
A: No. Passive crossover networks are not included because C7 drivers are designed for active systems. JL Audio recommends a tuning DSP, such as the TwK 88 or D8, and a dedicated amplifier channel for each C7 speaker.
Q: What frequency range should the C7-350cm be run over?
A: JL Audio's design bandwidth is 300 Hz - 10 kHz with 48 dB/octave filters, 400 Hz - 10 kHz with 24 dB/octave filters and 500 Hz - 10 kHz with 12 dB/octave filters. It is designed to work in a 3-way system with a woofer and tweeter.
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