Hertz DCX 710.3 Review: The Largest Dieci Coaxial We Sell, for 7x10 Openings Only
Updated: Oct 6
The Hertz DCX 710.3 is a 7x10-inch three-way coaxial speaker, the largest Dieci coaxial we sell. It combines a paper woofer with a 60 mm paper midrange and a 15 mm PEI-dome super-tweeter, and Hertz rates it at 150 W continuous (300 W peak), 93 dB sensitivity and a 40 Hz to 21 kHz response. At ₹14,990 MRP, it is the most expensive Dieci speaker we sell. It suits cars with a genuine 7x10 opening, in the doors or on a rear shelf, whose owners want a fuller sound from that position and plan to add an amplifier. See it on our Hertz DCX 710.3 product page.
Quick summary
A big three-way oval: paper woofer, 60 mm paper midrange and 15 mm PEI super-tweeter, for 7x10 openings only.
150 W continuous handling and 4 mm Xmax, the highest figures of any Dieci coaxial we sell.
93 dB sensitivity means it plays on a head unit, but its strengths only show with an amplifier.
We found no owner reviews of this size; the closest feedback is for the 6x9 DCX 690.3.
Hertz DCX 710.3 specifications
Specification | Hertz DCX 710.3 |
|---|---|
Type | 7x10-inch three-way coaxial |
Drivers | Paper woofer; 60 mm paper midrange; 15 mm PEI-dome super-tweeter |
Power handling | 150 W continuous, 300 W peak |
Impedance | 4 Ω |
Sensitivity | 93 dB |
Frequency response | 40 Hz – 21 kHz |
Woofer cone and surround | Water-repellent pressed paper; TPU |
Voice coil | 25 mm pure copper on Conex former |
Woofer magnet | Ferrite, 90 x 32 x 17 mm |
Xmax | 4 mm |
Fs / Qts / Vas | 69 Hz / 1.06 / 23 litres |
Weight | 1.35 kg |
Connections | Tin-plated high-current terminals; silver-plated lead wires |
India MRP | ₹14,990 |
Figures come from Hertz's official DCX 710.3 page. Its dimensions are printed only as lettered figures, without a legend (253 x 181 mm and 238 x 167 mm, plus 110 and 84 mm). The PDF tech sheet we read appears to carry a smaller model's dimensions, so we've used the product page; measure your opening before you buy.
First, confirm your car really takes a 7x10
Large oval speakers come in several sizes, and 6x9 is far more common than 7x10. The two are not interchangeable: a 7x10 needs a larger opening and a different screw pattern, so it won't drop into a 6x9 hole without cutting or a custom baffle. Before ordering, remove the factory speaker and measure it, or ask us to check fitment for your car. If it turns out to be a 6x9, the Hertz DCX 690.3 is the direct Dieci equivalent and costs ₹4,000 less.
Weight and depth matter too. At 1.35 kg, this is a heavy speaker for a pressed-steel parcel shelf or a plastic mounting ring, so it needs firm screws and, ideally, a solid baffle. On a rear shelf, check that the magnet and terminals clear the boot hinges and the boot lid's travel.
What the bigger frame buys over the 6x9
The DCX 710.3 and DCX 690.3 use the same size of 60 mm paper midrange and 15 mm PEI super-tweeter, so the difference is in the woofer. Hertz rates the 7x10 at 150 W continuous against 90 W, quotes its response down to 40 Hz against 45 Hz, and gives it twice the excursion (4 mm Xmax against 2 mm). Its magnet is a different shape, 90 x 32 x 17 mm against 80 x 40 x 15 mm.
The published Qts of 1.06 and Vas of 23 litres describe a woofer suited to free-air mounting, where a rear shelf or door uses the boot or door cavity as a large, leaky enclosure. In that position, the extra excursion lets the 7x10 move more air at the bottom of its range before it reaches its limit. It is not a subwoofer, but it can add useful weight from that position.
Factory head unit or amplifier?
At 93 dB, it will play on a head unit, but that leaves most of its 150 W continuous rating and 4 mm of travel unused. It makes the most sense with a four-channel amplifier. The Dieci Hertz DP 4.400 delivers 75 W per channel into 4 Ω and the DP 4.300 60 W, both well within the rating. Use the amplifier's high-pass filter to keep the very lowest notes out, especially if you also run a subwoofer.
Keep the rear speakers in their place. In most cars, rear coaxials fill in the sound for passengers and add body, while the front speakers create the stage. Set the fader or amplifier gains so the rear supports the front rather than dominating it.
What owners and reviewers say about the Hertz DCX 710.3
We found no owner or press reviews of the DCX 710.3 when we checked in October 2026, and we won't invent a verdict. Four Car Audio, the UK Hertz dealer whose pages carry reviews for most Dieci speakers we sell, doesn't list this 7x10 size.
The nearest feedback is for its 6x9 sibling. Four Car Audio's DCX 690.3 page has three reviews from 2015 and 2016. One buyer says the sound is really good, another gives the top score, and a third gives a middling score without explaining why. That covers the 6x9 model, which has the same-size midrange and super-tweeter but a different woofer, so it tells you little about the 710.3's bass. If you've fitted a DCX 710.3, we'd like to hear how it went.
DCX 710.3 vs DCX 690.3 and X 690
For a 6x9 opening, the choice is between the DCX 690.3 (₹10,990 MRP), with the same-size mid and super-tweeter, and the Uno-range Hertz X 690 (₹8,990 MRP), a four-way design rated at 85 W continuous with a 40 mm tweeter and two piezo super-tweeters. Neither is a direct fit for a 7x10 opening. For a 7x10, the DCX 710.3 is the only option in our Hertz range.
Who should buy it, and who shouldn't
Buy the DCX 710.3 if your car has 7x10 openings, you want rear speakers that add weight and fullness, and you have an amplifier or plan to add one.
Look elsewhere if your car takes 6x9s, or you'll only ever use head-unit power; the DCX 690.3 costs less and fits a more common opening. Don't expect rear ovals to replace a subwoofer, or to fix a weak front stage.
Installation notes for Indian cars
Rear shelves bake in the Indian sun and doors collect monsoon water; a TPU surround and water-repellent cone are sensible choices for both. Seal the gap between the speaker and the shelf so the front and rear of the cone don't cancel, and damp a thin shelf so it doesn't buzz; our sound damping guide covers the basics of applying damping material. Use speaker wire of decent gauge from the amplifier, and route it away from boot hinges and sharp edges. VA3 Car Studio in Ghaziabad offers professional installation.
Price and where to buy
The Hertz DCX 710.3 has an India MRP of ₹14,990 for the pair. Check today's price on our DCX 710.3 product page, and ask us to confirm your car's opening before you order. Every pair we sell is a genuine Hertz product.
The bottom line
The DCX 710.3 is a specialist part: the biggest Dieci coaxial we sell, with the most power handling and excursion, for the minority of cars with 7x10 openings. On paper it is a clear step up from the 6x9 DCX 690.3 in bass capability, but it needs an amplifier to show it, and owner feedback is missing. Confirm the fit first, and budget for the amplifier.
Hertz DCX 710.3 FAQ
Will the Hertz DCX 710.3 fit a 6x9 opening?
Not without cutting or a custom baffle. A 7x10 needs a larger opening and a different screw pattern. If your car takes 6x9 speakers, the DCX 690.3 is the direct Dieci fit and costs less.
Does the DCX 710.3 need an amplifier?
It will play on a head unit thanks to 93 dB sensitivity, but its 150 W continuous rating and 4 mm Xmax only pay off with an amplifier of around 60 to 75 W per channel.
Can the DCX 710.3 replace a subwoofer?
No. It is rated down to 40 Hz and can add useful weight from a rear shelf, but a subwoofer is still the right tool for the lowest octave and for clean bass at high volume.
Buy Hertz Speakers in India
Check the Hertz DCX 710.3 Dieci 7x10 Inch 3-Way Coaxial Car price in India, browse more Hertz speakers or compare all coaxial speakers in India. Want it fitted properly? Book a speaker upgrade at our Ghaziabad studio.
Comments