Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair - CEN
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Hertz Cento CX 100 4 Inch 10cm 2 Way Car Dash Door Coaxial Speakers 40w RMS Pair

£99.99
In stock
SKU: 90770MPN: CX 100
Part of the range · 23 productsPart of the Hertz Cento range · 23 products See the range →

The Hertz Cento CX 100 is a pair of 4 inch (100 mm) two-way coaxial car speakers rated at 40W RMS and 120W peak, with a 24 mm Tetolon dome tweeter, from the Hertz Cento range — designed to upgrade factory dash and door speaker positions.

Key specifications

  • Size: 100 mm (4 in.)
  • Type: 2-way coaxial
  • Power handling: 40W RMS, 120W peak
  • Impedance: 4 ohm
  • Frequency response: 80 Hz to 22 kHz
  • Tweeter: 24 mm Tetolon dome, neodymium magnet, RHFC directable
  • Woofer cone: SPP-M semi-pressed paper with mica
  • Weight: 0.47 kg per speaker

Hertz CX 100

Coaxial speakers are a genuine engineering challenge — they must perform well in OEM positions that are rarely acoustically ideal. The Cento CX 100 addresses this with a 24 mm Tetolon® dome tweeter, which delivers a more musical and detailed sound than conventional plastic-dome designs. Dispersion is optimised for off-axis listening, and the SPP-M (Semi Pressed Paper-Mica) cone provides a strong balance of lightness and damping. If you need a larger coaxial option, the Hertz Dieci DCX 165.3 offers a 6.5 inch two-way coaxial alternative.

  • Soft Tetolon® fibre 24 mm (0.9 in.) dome tweeter cooled with ferrofluid, for extended and natural high frequencies.
  • RHFC™ (Rotary High Frequency Contour) tweeter angled and directable to the listener for a perfect frequency response in any installation.
  • Tweeter faceplate geometry optimised with FEM simulations (Finite Element Modelling) for a linear frequency response in off-axis installations.
  • 25 mm (1 in.) woofer voice coil with aluminium former for high excursion and power handling.
  • 100 mm (4 in.) SPP-M cone enhanced with Mica powder for an excellent balance between lightness and damping.
  • High-density flux ferrite magnet with low-carbon polar plates for reduced distortion at high power levels.
  • Compact three-spoke basket acoustically combined with a rubber magnet cover for damping of spurious vibrations.
  • Optional grille: high-resistance ABS plastic structure with metallic finish and protective metal mesh.

Explore the full range in Hertz Cento.

Specification
Power Handling- Continuous W    40
Power Handling- Peak W    120
ImpedanceOhm    4
Frequency ResponseHz    80 ÷ 22k
Weightof one speaker kg (lb.)    0,47 (1.04)
Cone   Semi-pressed paper + Mica
More specs
  • Component    Coaxials
  • Size mm (in.)    100 (4)
  • Woofer Voice Coil Ø mm (in.)    25 (1)
  • Tweeter Voice Coil Ø mm (in.)    13 (0.5)
  • Woofer Magnet size D x d x h mm (in.)    70 x 32 x 10 (2.76 x 1.26 x 0.39)
  • Tweeter Magnet size D x h mm (in.)    13 x 2 (0.51 x 0.08)
  • Woofer Magnet    High density flux ferrite
  • Tweeter Magnet    Neodymium
  • Dome    Tetolon
  • Xmech mm (in.)    2,9 (0.11)
What's Included
  • 2-way Speakers
  • Screws
  • Speed clips
  • Owner's manual
  • Template on box
Download User Manual(PDF)
Product information

Hertz

About the Hertz CX 100

From our tech experts at CEN

Hertz Cento series 4 inch coaxial pair, with the tweeter in the centre of the woofer, rated at 40w RMS.

Who it suits

Drivers replacing tired factory speakers who want a clear improvement without complication.

Our tech experts advise

Sizes, adapter rings and harnesses vary by vehicle, year and trim, so we confirm what your car takes before ordering rather than guessing. Door treatment matters as much as the speaker itself, and an amplifier will get far more out of these than a head unit can. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.

Explore the full Hertz range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Hertz

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Car audio installation by CEN in Nottingham

Have it Fitted By Our Team

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.

  1. 1

    Tell us your vehicle

    Make, model and year, and what you'd like fitted.

  2. 2

    We confirm the parts

    Fascia, wiring and interfaces checked for your car, with a fitted price.

  3. 3

    Fitted at our workshop

    Bring it to our Beeston workshop and we do the rest.

Get a Quote Our Services

Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA

Car audio installation by CEN in NottinghamCar audio installation by CEN in NottinghamCar audio installation by CEN in NottinghamCar audio installation by CEN in Nottingham

Hertz Car Audio Range

Hertz produces high-performance car audio systems driven by research.Music fans who attend live concerts know well the emotions that low undistorted frequencies without dynamic compression can arouse.

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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: What size are the Hertz Cento CX 100 speakers?

A: They are 100 mm (4 inch) two-way coaxial speakers, a common size for dashboards and some front doors.

Q: Are grilles included with the CX 100?

A: No. Hertz offers a grille with an ABS plastic frame, metallic finish and protective metal mesh as an optional extra.

Q: Can the CX 100 tweeter be angled?

A: Yes. The RHFC (Rotary High Frequency Contour) tweeter can be angled towards the listener for a more even frequency response in off-axis installations.