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Hertz Uno 6" x 9" Coaxial Speaker-X 690

Model #: X 690
At a Glance

For our fans seeking strong emotions who have a 6”x9” OEM setup, Hertz offers the X 690, a 4 way monster with a power handling of 340 W. The double 15 mm piezoelectric super-tweeter with PEI dome extends the frequency response above 20 kHz, maximizing the stereo image.

Available in Store Only

Get to know this product.

  • 1. Double 15 mm piezoelectric super-tweeter with PEI dome to extend the frequency response above 20 kHz.
  • 2. 40 mm PEI tweeter with ferrite motor, for a brilliant reproduction of mid-high frequencies and compactness.
  • 3. Tweeter and super-tweeter faceplate optimized for exceptional off-axis performance.
  • 4. High stiffness metallic-grey finish pressed-paper cone with water-repellent treatment.
  • 5. Foam surround combining high sensitivity and deep bass response.
  • 6. Pure copper 25mm (1 in.) voice coil woofer for high dynamic power handling.
  • 7. High flux density 80mm (3.15 in.) ferrite magnet for a powerful undistorted sound.
  • 8. Easy-to-install DIN size basket protected by abrasion-resistant dust paint.


Power Handling - Peak W340
Power Handling - Continuous W85
Impedance ?4
Frequency response Hz45 ÷ 22k
Sensitivity dB SPL94
Woofer size mm (in.)6 x 9
Tweeter size mm (in.)40 (1.6)
Supertweeter size mm (in.)2 x 15 (0.6)
Woofer Voice Coil Ø mm (in.)25 (1)
Tweeter voice coil Ø mm (in.)20 (0.8)
Woofer magnetHigh density flux ferrite
Tweeter magnetFerrite
Woofer coneWater-repellent pressed paper
Tweeter domePEI
Supertweeter domePEI

Misc. Specs

Impedance4 Ohms
Manufacturer Warranty2 Year
Car Speaker Size6 x 9
Mounting Hardware IncludedYes
Rms Power Handling85
Water ResistantNo
Peak Power Rating (Watts)340
Shallow MountNo
WarningProposition 65 Warning for California Residents