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5.6K3X 3-Way Speaker System with Crossover
The ESB Audio 5.6K3X is a premium 3-way component speaker system from the 5000 Series, engineered in Italy for ultra-high transient response, low distortion, and accurate sound reproduction. Designed for SQ (sound quality) builds, it delivers detailed mids, crisp highs, and controlled midbass performance when properly amplified and tuned.
Features
- Premium 3-way component speaker system
- Designed for high-end sound quality installations (SQ builds)
- Ultra-light, fast-response driver design for improved transient accuracy
- Built using carbon fiber reinforced composite materials
- Engineered for low distortion and high clarity across all frequencies
- Optimized for use with DSP tuning and external amplification
- Includes 1.1″ tweeter, 2″ midrange, and 6.5″ mid-woofer for full-range audio reproduction
- High-quality motor structures and reinforced baskets for durability and performance
- Designed for flexible integration in passive or active system configurations
Explore the full range in ESB Audio.
Specification
| Tweeter Nominal Impedance | 4 Ohm |
|---|---|
| Tweeter Nominal Power Handling | 110 Watt |
| Tweeter Transient Power | 220 Watt |
| Tweeter Frequency Response | 900 Hz ~ 25 KHz |
| Tweeter Sensitivity | 94 dB 2.83v/1m |
| Midrange Nominal Impedance | 4 Ohm |
| Midrange Nominal Power Handling | 120 Watt |
| Midrange Transient Power | 240 Watt |
| Midrange Frequency Response | 500 Hz ~ 6 KHz |
| Midrange Sensitivity | 94 dB 2.83v/1m |
| Woofer Nominal Impedance | 3 Ohm |
| Woofer Nominal Power | 160 Watt |
| Woofer Transient Power | 320 Watt |
| Woofer Frequency Response | 50 Hz ~ 3.5 KHz |
| Woofer Sensitivity | 95 dB 2.83v/1m |
| Crossover Frequency | 900/3600 Hz |
| Slope | 12 dB/Oct LP/HP, 6 dB/Oct BP Butterworth |
| High Frequency Level | 0/-3 dB |
| Mid Frequency Level | 0/-2 dB |
| Low Frequency section | 5.165 |
| Mid Frequency section | 5.050 |
| High Frequency section | 5.028 |
| Power Handling | 300 Watt |
What's Included
- 5.028 Tweeters
- 5.050 Midrange
- 5.165 Woofers
- 5.6K3 CX Crossover
ESB Audio
Explore the full ESB Audio range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all ESB Audio
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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.













































