ESB Harmony Series

ESB Harmony Series is a complete car audio range from ESB Audio, covering coaxial speakers, 2-way component kits and active subwoofers. Available from £59.99, the range suits drivers looking for a straightforward factory speaker upgrade or a bass solution that does not eat into boot or interior space.

Speakers come in 4 inch, 5 inch and 6.5 inch sizes in both coaxial and component configurations. The subwoofer line-up includes underseat active models with built-in amplification and a spare wheel active subwoofer, all ready to install without a separate amplifier.
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ESB Harmony Series at a glance

  • ESB HR 4C — 4 inch 2-way coaxial pair, 45W RMS, £59.99
  • ESB HR 4K2X — 4 inch 2-way component kit, silk dome tweeter, 12 dB crossover, 50W RMS, £69.99
  • ESB HR 5C — 5 inch 2-way coaxial pair, 50W RMS, £64.99
  • ESB HR 5K2X — 5 inch 2-way component kit, silk dome tweeter, 12 dB crossover, 60W RMS, £79.99
  • ESB HB1.6C — 6.5 inch 2-way coaxial pair, Mylar dome tweeter, 50W RMS, £59.99
  • ESB HB1.6K2X — 6.5 inch 2-way component system, silk dome tweeter, 12 dB crossover, 65W RMS, £79.99
  • ESB HR 10 US — 10 inch active underseat subwoofer, 130W RMS Class AB amplifier built in, £229.99
  • ESB HR 6 US P — 6.5 inch active underseat subwoofer, 250W RMS Class D amplifier built in, £279.00
  • ESB HR 11 SW — 11 inch active spare wheel subwoofer, 200W RMS Class D amplifier built in, £349.00
  • ESB HB 1.10S4 — 10 inch passive subwoofer driver, 200W RMS, 4 ohm, £99.99

Which ESB Harmony speaker or subwoofer is right for you?

For the simplest upgrade, the coaxial pairs (HR 4C, HR 5C, HB1.6C) drop into existing speaker locations on standard wiring. The component kits (HR 4K2X, HR 5K2X, HB1.6K2X) separate the tweeter from the woofer and include a 12 dB crossover for better stereo imaging, but require the tweeter to be mounted in a separate position.

For bass without losing interior space, the underseat active subwoofers (HR 10 US and HR 6 US P) fit under a front seat with their amplifiers already built in. The HR 11 SW sits inside a spare tyre rim to keep the boot completely free. If you already have a separate amplifier and enclosure planned, the passive HB 1.10S4 10 inch driver is the option to pair with it.

ESB Harmony Series FAQs

Q: What is the difference between the coaxial and component speakers in the Harmony range?

A: Coaxial models (HR 4C, HR 5C, HB1.6C) combine the woofer and tweeter in one unit for a direct drop-in fit. Component kits (HR 4K2X, HR 5K2X, HB1.6K2X) use a separate tweeter and an external 12 dB crossover so the tweeter can be positioned for improved stereo imaging.

Q: Do the Harmony active subwoofers need a separate amplifier?

A: No — the HR 10 US, HR 6 US P and HR 11 SW all have a built-in amplifier, so they connect directly to your existing stereo without needing a separate amp.

Q: What is the difference between the HR 10 US and the HR 6 US P underseat subwoofers?

A: The HR 10 US uses a 10 inch driver with a 130W RMS Class AB amplifier, while the HR 6 US P uses a 6.5 inch driver with a more powerful 250W RMS Class D amplifier in a compact 220 x 190 x 76 mm enclosure.

Q: Does the ESB HB 1.10S4 include an amplifier or enclosure?

A: No — the HB 1.10S4 is a passive 10 inch driver rated at 200W RMS and 4 ohm; it requires a separate amplifier and a suitable enclosure.

Q: Can CEN fit ESB Harmony speakers and subwoofers at their Nottingham workshop?

A: Yes — CEN has a fitting workshop at their Beeston, Nottingham store and can install speakers and subwoofers from the ESB Harmony range into your vehicle.