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Hertz

Dieci#DCX 690.3

Hertz Dieci DCX 690.3Dieci Series Car Audio Coaxials

4.54 reviewsSee all reviews

A 6x9 coaxial that delivers crisp, detailed high end and can get very loud when driven appropriately; bass is present but may be modest for bass-first listeners.

Buyer confidence

79%

Key specs

Full specs
Component
Three way coaxial
Size mm (in.)
(6 x 9)
Power Handling - Continuous W
90
Power Handling - Peak W
180
Impedance Ohm
4
Depth mm (in.)
98 (3.9)
Woofer Voice Coil Ø mm (in.)
25 (1.0)
Frequency Response Hz
45 ÷ 21k

Key specs

Full specs
Component
Three way coaxial
Size mm (in.)
(6 x 9)
Power Handling - Continuous W
90
Power Handling - Peak W
180

Review highlights

Based on customer reviews

Hertz DCX 690.3 — Clear highs and strong output with proper power

A 6x9 coaxial that delivers crisp, detailed high end and can get very loud when driven appropriately; bass is present but may be modest for bass-first listeners.

4 reviews4.5/5 averageUpdated Mar 15, 2026

What buyers praise

  • Crisp, clear high-frequency detail
  • High output — very loud when fed adequate power

What to watch for

  • Performs best with adequate amplification — needs correct power to reach potential
Overview
Hertz DCX 690.3 Dieci series car audio coaxials use an oversized magnetic group, TPU (Thermoplastic polyurethane) surround, a 60 mm diameter midrange, and a PEI dome tweeter. The result is linearity, wide dispersion, and extra-ordinary efficiency not found in traditional coax components. An involving, emotional sound, even at high SPL levels. An authentic 3-way coax capable of reproducing a wide frequency spectrum.
Specs

Technical Specs

12
ComponentThree way coaxial
Size mm (in.)(6 x 9)
Power Handling - Continuous W90
Power Handling - Peak W180
Impedance Ohm4
Depth mm (in.)98 (3.9)
Woofer Voice Coil Ø mm (in.)25 (1.0)
Frequency Response Hz45 ÷ 21k
Woofer Magnet size D x d x h mm (in.)80 x 40 x 15 (3.1 x 1.6 x 0.6)
Weight of one speaker kg (lb.)0,95 (2.09)
Woofer MagnetHigh density flux ferrite
Tweeter MagnetHigh density flux ferrite

Electro-acoustic Specs

11
D mm170
Re Ohm3,4
Fs Hz66
Vas I25,7
Mms g16,5
Cms mm/N0,35
BL T*m3,9
Qts1,12
Qes1,55
Qms4,06
Spl dB93

Physical Specs

6
DCX 690.3
A1237 mm (9.3 in.)
A2162 mm (6.4 in.)
B1224 mm (8.8 in.)
B2153 mm (6.0 in.)
C98 mm (3.9 in.)
D77 mm (3.0 in.)
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