High-end 6x9 speakers that deliver crisp, clean highs, warm mids and balanced bass with solid construction — many reviewers note a clear uplift in loudness and overall sound quality.
Buyer confidence
88%Highlights
- 6×9 in. semi-pressed paper elliptical cone SPP-M (Semi Pressed Paper-Mica) enhanced with Mica powder for an excellent balance between lightness and damping.
- Wide rubber suspension engineered for a long excursion and excellent sound damping.
- High-density flux ferrite magnet combined with low-carbon polar plates for reduced distortion at high power levels.
- Basket with metallic finish acoustically combined with a rubber magnet cover for total damping of spurious vibrations.
Key specs
Full specs- Component
- Coaxials
- Size mm (in.)
- (6 x 9)
- Power Handling - Continuous W
- 100
- Power Handling - Peak W
- 300
- Impedance Ohm
- 4
- Tweeter diaphragm mm (in.)
- 40 (1.58)
- Woofer Voice Coil Ø mm (in.)
- 30 (1.2)
- Tweeter Voice Coil Ø mm (in.)
- 28 (1.1)
Key specs
Full specs- Component
- Coaxials
- Size mm (in.)
- (6 x 9)
- Power Handling - Continuous W
- 100
- Power Handling - Peak W
- 300
Highlights
Overview- 6×9 in. semi-pressed paper elliptical cone SPP-M (Semi Pressed Paper-Mica) enhanced with Mica powder for an excellent balance between lightness and damping.
- Wide rubber suspension engineered for a long excursion and excellent sound damping.
- High-density flux ferrite magnet combined with low-carbon polar plates for reduced distortion at high power levels.
Review highlights
Based on customer reviewsHertz CX 690 — clear, powerful 6x9 car speakers with refined highs
High-end 6x9 speakers that deliver crisp, clean highs, warm mids and balanced bass with solid construction — many reviewers note a clear uplift in loudness and overall sound quality.
What buyers praise
- Crisp, clean high frequencies
- Warm mids and balanced, punchy bass
What to watch for
- 6x9 size may not match some factory openings — confirm fit before buying
Overview
The three-way elliptical coax CX 690 featuring a 6x9 in. cone was designed to achieve maximum performance in horizontal installations and offering, even in this difficult condition, an exceptional tone balance and power handling.
Key features
- 6×9 in. semi-pressed paper elliptical cone SPP-M (Semi Pressed Paper-Mica) enhanced with Mica powder for an excellent balance between lightness and damping.
- Wide rubber suspension engineered for a long excursion and excellent sound damping.
- High-density flux ferrite magnet combined with low-carbon polar plates for reduced distortion at high power levels.
- Basket with metallic finish acoustically combined with a rubber magnet cover for total damping of spurious vibrations.
- 40 mm (1.58 in.) dome tweeter for efficient distortion-free mid-high frequency reproduction.
- 20 mm (0.8 in.) dome supertweeter to maximize the level of very high frequencies in horizontal installations.
- Tweeter faceplate geometry optimized with FEM simulations (Finite Element Modeling), to provide an extremely linear frequency response in off-axis installations.
- Provided elegant grille made with high-resistance ABS plastic structure with a metallic finish combined with a protective metal mesh.
- SPP-M
Technologies

SPP-M
SPP-M (Semi Pressed Paper-Mica) cone enhanced with Mica powder for an excellent balance between lightness and
Specs
Technical Specs
| Component | Coaxials |
| Size mm (in.) | (6 x 9) |
| Power Handling - Continuous W | 100 |
| Power Handling - Peak W | 300 |
| Impedance Ohm | 4 |
| Tweeter diaphragm mm (in.) | 40 (1.58) |
| Woofer Voice Coil Ø mm (in.) | 30 (1.2) |
| Tweeter Voice Coil Ø mm (in.) | 28 (1.1) |
| Frequency Response Hz | 40 ÷ 23k |
| Woofer Magnet size D x d x h mm (in.) | 100 x 32 x 15 (3.94 x 1.26 x 0.59) |
| Tweeter Magnet size D x h mm (in.) | 19 x 3 (0.75 x 0.12) |
| Weight of one speaker kg (lb.) | 1,55 (3.42) |
| Woofer Magnet | High density flux ferrite |
| Tweeter Magnet | Neodymium |
| Cone | Semi-pressed paper + Mica |
| Dome | PEI |
| Xmech mm (in.) | 5,5 (0.22) |
Electro-acoustic Specs
| D mm | 139 |
| Re Ohm | 3,3 |
| Fs Hz | 70 |
| Le mH | 0,2 |
| Vas I | 11,1 |
| Mms g | 13 |
| Cms mm/N | 0,34 |
| BL T*m | 4,9 |
| Qts | 0,67 |
| Qes | 0,83 |
| Qms | 3,3 |
| Spl dB | 93,5 |
Physical Specs

| A | 238 mm | 9.37 in. |
| B | 224 mm | 8.82 in. |
| C | 95 mm | 3,74 in. |
| D | 78,5 mm | 3.09 in. |
| E | 268 mm | 10.55 in. |
| F | 29 mm | 1.14 in. |
Frequency response

Visual spec reference.
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