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Item #:
14149132
Harmony Audio Competition Dual 12" Loaded Sub Box 6000W SPL Subwoofer | Vented HA-ML121 Enclosure with Twin 12 Inch Woofers, Extreme Bass for Car
61% of respondents would recommend this to a friend
Item #:
14149132
IMP 913
Price Details
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With a combined power handling of 6400W, this system can handle high-powered amplifiers, ensuring the capability to produce loud and dynamic bass.
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What Stands Out
Powerful Performance
With a maximum output of 6400W, this subwoofer delivers deep, booming bass that enhances any audio experience, making it perfect for competitions or high-energy events.
Dual 15-Inch Drivers
The dual 15-inch drivers provide increased surface area for superior sound projection, resulting in powerful vibrations and an immersive listening experience that outperforms many standard single-driver setups.
Vented SPL Design
The specialized vented design improves airflow and efficiency, reducing distortion while maximizing sound clarity, ensuring your music remains crisp and impactful, even at maximum volume.
Product Details
| Audio Output Mode | Surround |
| Mounting Type | Car Mount |
| Speaker Type | Subwoofer, Surround Sound |
| Antenna Location | Vented |
| Subwoofer Diameter | 12 inches (30.5 cm) |
| Color | Dual 1 Ohm |
| Is Waterproof | FALSE |
| Control Method | Touch |
| Speaker Size | 12 inches (30.5 cm) |
| Woofer Diameter | 12 inches (30.5 cm) |
| Specific Uses For Product | Vented, Car |
| Controller Type | Voice control |
| Item Dimensions D x W x H | 18.75"D x 32.75"W x 14"H (47.6 x 83.2 x 35.6 cm) |
| Connectivity Technology | wired |
| Subwoofer Connectivity Technology | Wired |
| Connectivity Protocol | aux |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 12 inches (30.5 cm) |
| Brand | Harmony Audio |
| Model Number | HA-MONOLITH-9 |
| Model Name | HA ML121 |
| Built-In Media | Custom Car Audio Dual 12"Slot Ported Sub Box, 2 x Harmony Audio HA-ML121 Monolith 12"Competition Sub 3000W Dual 1 Ohm Subwoofer, 2 x Harmony Audio 24"Wire with .205"Spade and Soldered End |
| UPC | 603167656273 |
| Manufacturer | Harmony Audio |
| Speaker Maximum Output Power | 6000 watts |
| Frequency Response | 300 hertz |
| Number of Audio Channels | 5.1 |
| Compatible Devices | Smartphone, MP3 Player |
| Compatible with Vehicle Type | Car |
| Power Source | 12V |
Who Should Buy?
-
Bass Enthusiasts
Ideal for users who crave deep, powerful bass to enhance their music experience in their vehicles.
-
Competition Audio Systems
Great for competitors looking to maximize SPL in car audio contests, providing a significant edge in performance.
-
Large Vehicles
Perfect for trucks and SUVs, where space allows for larger sound systems that require significant power.
-
Casual Listeners
Not suitable for average users who prefer balanced sound over excessive bass, which may overwhelm their audio experience.
Product Description
Harmony Audio Competition Dual 12" Loaded Sub Box 6000W SPL Subwoofer | Vented HA-ML121 Enclosure with Twin 12 Inch Woofers, Extreme Bass for Car Shows, High Output Port Design, Ready to Install
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Customer Questions & Answers
-
Question:
What is the maximum power handling of the subwoofers?
Answer: The maximum power handling is 3200 watts per subwoofer, totaling 6400 watts for the system. -
Question:
What type of audio experience can I expect?
Answer: You can expect a loud and dynamic bass experience, ideal for competition-level audio. -
Question:
Is the sub box included in the package?
Answer: Yes, the package includes a custom vented SPL sub box designed for optimal bass output.
Harmony Audio Component Subwoofers HA-MONOLITH-9 Editorial Review
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Pros
- Powerful sound output
- Great for bass enthusiasts
- Durable construction
- Appealing design
Cons
- Requires careful tuning for best performance.
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“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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IMP 913
Order now and get it around Sunday, September 27
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Features & Benefits
- Combined power handling of 6400W for dynamic bass.
- Includes dual 15” competition-grade subwoofers.
- Vented SPL sub box optimizes bass response.
- Engineered for precise bass reproduction, ideal for competitions.
- High quality MDF construction for durability.
- Perfect for audio enthusiasts seeking intense sound quality.
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