Hertz CBA 250 Active Sealed Subwoofer 10 Inch | 500W Peak
If you want serious bass without gutting your entire boot space, the Hertz CBA 250 is built exactly for that. It packs a 10-inch high-excursion driver and a dedicated amplification module into one ultra-slim sealed enclosure — just 158 mm deep — so you get clean, powerful low-end that actually fits your car.
What is this Product?
The Hertz CBA 250 is a complete active subwoofer system — driver, enclosure, and amplifier all in one box. Unlike passive subwoofers that need a separate amp, the CBA 250 is self-contained and ready to connect directly to your car's existing audio system or an aftermarket head unit. It is part of Hertz's Compact Bass Active (CBA) series, designed for drivers who want premium Italian-engineered bass in a practical, space-saving format.
Why Choose This Product?
- ✅ All-in-one active system — no separate amplifier needed
- ✅ Ultra-slim 158 mm (6.22 in.) profile fits most car trunks easily
- ✅ Works with OEM factory audio systems via high-level speaker input
- ✅ 90% amplifier efficiency — runs cool, wastes less power
- ✅ Plug & Play SSP connector for quick, clean installation
- ✅ Rounded corners reduce enclosure resonance and protect your boot lining
- ✅ HRC AP remote control and metal grille included in the box
Key Features
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10-inch (250 mm) driver — large enough for deep, room-filling bass, compact enough for real-world fitment
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250W RMS / 500W Peak power — plenty of headroom for dynamic music without distortion
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0.4 Ohm impedance — high-impedance design that works efficiently with the integrated he-li amplifier
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Variable low-pass filter (50–200 Hz) at 12dB/Oct. — dial in exactly where the sub takes over from your main speakers
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Adjustable bass-boost (0–6 dB at 45 Hz) — add warmth and punch to the lowest frequencies
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Phase control (0–180°) — align the sub's output with your front speakers for a seamless soundstage
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Subsonic filter — protects the driver from damaging ultra-low frequencies
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High-level speaker input — connects directly to factory speaker wires, no RCA outputs required
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Low-level RCA input — for aftermarket head units with dedicated sub outputs
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ART (Automatic Remote Turn-On) — auto power-on via remote wire, high-level signal, or audio signal detection
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Down-firing design with Velcro feet — stays put on carpet, easy to remove when needed
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Defeatable filter — bypass the onboard filter when using an external processor with a dedicated sub pre-out
Advanced Technologies
he-li Technology (High Efficiency / Low Impedance): The amplification module inside the CBA 250 uses Hertz's proprietary he-li design, which eliminates the need for a DC-DC voltage booster. This allows the Class-D amplifier to reach up to 90% efficiency — very close to the theoretical maximum. In practical terms, that means less heat, less drain on your car's electrical system, and more of your battery's power going directly into producing bass.
2S² Design (2 Sides / 2 Sounds): The enclosure is engineered with Hertz's 2S² philosophy, which optimises the internal volume and port geometry so the sealed box performs consistently across different listening levels. You get tight, accurate bass at low volumes and controlled, powerful output when you push it harder.
SSP (Sub Smart Plug) Terminal Block: The Plug & Play multi-pole connector simplifies installation significantly. All signal inputs, power connections, and control wires come together in one tidy connector block. If you ever need to remove the subwoofer — to access the spare tyre, for example — you can disconnect it cleanly in seconds without disturbing any wiring.
Wide Linear Excursion Cone Design: The cone, dust-cap, and basket geometry are engineered together to achieve 9 mm of linear excursion in one direction while keeping the overall assembly depth to a minimum. This means the driver can move a lot of air — producing deep, impactful bass — without needing a large enclosure to do it.
Benefits
- 🔊 Deep, accurate bass that complements your existing speakers without overpowering them
- 🚗 Fits neatly in most car boots without sacrificing luggage space
- ⚡ Efficient amplification keeps your alternator and battery happy on long drives
- 🔌 Simple installation — works with factory wiring, no head unit upgrade required
- 🎛️ Full tuning control so you can match the sub to any music genre
- 🛡️ Metal grille protects the driver from accidental damage
- 📦 Remote control included for convenient bass level adjustment from the driver's seat
Who Should Buy This Product?
- Car owners who want to add bass to a factory audio system without a full system overhaul
- Enthusiasts upgrading from a basic aftermarket setup who want a clean, integrated solution
- Anyone with limited boot space who still wants genuine subwoofer performance
- Drivers who prefer a tidy, professional-looking installation with minimal wiring
- Music lovers who listen to genres where bass presence matters — hip-hop, EDM, rock, or film scores
Technical Specifications
| Specification |
Value |
| Model |
Hertz CBA 250 |
| Driver Size |
250 mm (10 in.) |
| Power Handling — Continuous (RMS) |
250 W |
| Power Handling — Peak |
500 W |
| Impedance |
0.4 Ohm |
| Design |
Active Sealed Subwoofer Box |
| Voice Coil Diameter |
60 mm (2.36 in.) |
| Frequency Response |
20 – 200 Hz |
| Magnet Size (D × d × h) |
140 × 70 × 30 mm (5.51 × 2.76 × 1.81 in.) |
| Magnet Type |
High Density Flux Ferrite |
| Cone Material |
Pressed Paper |
| Xmech (Mechanical Excursion) |
14.75 mm |
| Voice Coil Type |
Copper |
| Low-Pass Filter |
Butterworth 12 dB/Oct., variable 50–200 Hz |
| Bass Boost |
0–6 dB @ 45 Hz (adjustable) |
| Phase Control |
0° – 180° |
| Enclosure Profile Depth |
158 mm (6.22 in.) |
| Amplifier Technology |
he-li (High Efficiency / Low Impedance), Class-D |
| Amplifier Efficiency |
Up to 90% |
| ART Turn-On |
Remote-in / Hi-level / Audio signal (selectable) |
| Inputs |
High-level speaker-in (multi-pin) + Low-level RCA |
| Accessories Included |
HRC AP Remote Control, Metal Grille, Velcro Feet |
Why Choose Dolphin Accessories?
- ✅ 100% Genuine Products — every item we sell is sourced directly from authorised distributors
- ✅ Expert Guidance — our team understands car audio and can help you choose the right setup
- ✅ Pan-India Delivery — we ship to every corner of the country, quickly and reliably
- ✅ Secure Packaging — your order is packed to survive the journey, not just look good on a shelf
- ✅ After-Sales Support — we are here after your purchase, not just before it
- ✅ Trusted by Enthusiasts — thousands of car audio fans across India choose Dolphin Accessories
Frequently Asked Questions
Q: Does the Hertz CBA 250 need a separate amplifier?
No. The CBA 250 is an active subwoofer — the amplifier is built into the enclosure. You just connect it to your car's power and audio source and it is ready to go.
Q: Can I connect the Hertz CBA 250 to my factory car stereo?
Yes. It has a high-level speaker input that connects directly to your existing factory speaker wires, so you do not need an aftermarket head unit or RCA outputs.
Q: What is the power output of the Hertz CBA 250?
It delivers 250W RMS continuous power and handles up to 500W peak.
Q: How deep is the Hertz CBA 250 enclosure?
The enclosure has an ultra-low profile of just 158 mm (6.22 inches), making it one of the slimmest active subwoofer boxes in its class.
Q: What does he-li technology mean?
he-li stands for High Efficiency / Low Impedance. It is Hertz's amplifier design that removes the DC-DC voltage booster, allowing the Class-D amp to reach up to 90% efficiency — meaning less heat and less drain on your car's battery.
Q: What is the frequency range of the Hertz CBA 250?
It covers 20 Hz to 200 Hz, which covers the full subwoofer range from deep rumble to upper bass.
Q: Can I adjust the bass level from the driver's seat?
Yes. The HRC AP remote control is included in the box, so you can adjust the bass level without reaching into the boot.
Q: What is the ART function on the Hertz CBA 250?
ART stands for Automatic Remote Turn-On. It lets the subwoofer power on automatically when it detects a remote wire signal, a high-level audio signal, or an audio input — whichever suits your installation.
Q: Is the Hertz CBA 250 suitable for all car types?
Its slim 158 mm profile makes it compatible with most sedans, hatchbacks, SUVs, and MPVs. It is designed to fit in the boot without taking up excessive space.
Q: Does the Hertz CBA 250 come with a grille?
Yes, a sturdy metal grille is included to protect the driver from accidental damage.
Q: What is the impedance of the Hertz CBA 250?
The driver has a 0.4 Ohm impedance, which is a high-impedance design optimised to work with the integrated he-li amplifier module.
Q: Is the Hertz CBA 250 available with pan-India delivery?
Yes. Dolphin Accessories ships the Hertz CBA 250 across India with secure packaging to ensure it arrives in perfect condition.
