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  5. HMS 12 B4-LD-C

HMS 12 B4-LD-C

1 review

500 Watt

HMS 12 B4-LD-C

1 review

Technical Highlights

  • 500 W RMS power, 4 Ohm impedance, 12" (30 cm) subwoofer, high power handling.
  • Long linear travel, minimal distortion, 191 mm depth.
  • Dual color LED adjustment, 65.5 mm voice coil, high density magnet.
  • More technical details
€336.82
-23% €439.00 €336.82
2% discount with credit card
including VAT
Estimated delivery: Sep 15–Sep 18.
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Hertz-HMS 12 B4-LD-C-12" (30cm) Subwoofer-masori-kaufen
€336.82
€439.00 €336.82

The Hertz HMS 12 B4-LD-C is a 12 inch (30 cm) Subwoofer for marine applications, designed for free-air use. The single voice coil with 4 Ohm, a continuous power handling of 500 W, and 1000 W peak are key features. The drive uses a high-density ferrite magnet, a voice coil with a diameter of 65.5 mm, and a polypropylene cone with UV inhibitors. The grill features integrated LEDs. Technical specifications include a depth of 191 mm, Xmax 19 mm, Fs 30 Hz, SPL 89.5 dB, and a diameter of 300 mm. Other parameters: Re 1.8 Ohm, Le 0.41 mH, Vas 95.4 l, Mms 114 g, Cms 0.225 mm/N, BL 8 Tm, Qts 1, Qes 1.1, Qms 11.1. Dimensions from the diagram: A 342.9 mm, B 279.4 mm, C 192.8 mm, D 140.6 mm, F 52.2 mm.

Features
  • 12 inch (30 cm) Subwoofer
  • Marine Subwoofer
  • Free-air design
  • Single voice coil
  • Impedance 4 Ohm
  • Power handling RMS 500 W
  • Power handling Peak 1000 W
  • Grill with integrated LED lighting
  • Cone made of polypropylene with UV inhibitors
  • Magnet made of high-density ferrite
  • Depth 191 mm
  • Diameter 300 mm
  • Weight 7.6 kg
  • Long linear stroke capability
Technical data
  • Voice coil Ø 65.5 mm
  • Magnet size 156 x 80 x 40 mm
  • Xmax 19 mm
  • Re 1.8 Ohm
  • Fs 30 Hz
  • Le 0.41 mH
  • Vas 95.4 l
  • Mms 114 g
  • Cms 0.225 mm/N
  • BL 8 Tm
  • Qts 1
  • Qes 1.1
  • Qms 11.1
  • SPL 89.5 dB
  • Size A 342.9 mm
  • Size B 279.4 mm
  • Size C 192.8 mm
  • Size D 140.6 mm
  • Size F 52.2 mm

Frequently Asked Questions about HMS 12 B4-LD-C

What impedance options does the Hertz HMS 12 B4-LD-C Marine Subwoofer offer?

The Hertz HMS 12 B4-LD-C Marine Subwoofer is available in two impedance options: the 2-ohm and the 4-ohm version. This selection provides versatile installation possibilities and compatibility with various amplifier configurations. Choosing the right impedance can significantly affect the load requirements and overall performance of the audio system. For example, if you operate an amplifier with a higher load, the 4-ohm version may be more suitable, while the 2-ohm version allows for higher current draw and is sensible for setups with multiple subwoofers. It is important to follow the amplifier-subwoofer matching rules to avoid overload.

What distinguishes the Free-Air application of the HMS 12 B4-LD-C?

The HMS 12 B4-LD-C from Hertz is specifically designed for Free-Air applications, meaning it can be operated without a conventional enclosure. This feature is particularly advantageous on boats, where space constraints are often an issue. The subwoofer unleashes its full potential, delivering deep, powerful bass without the need for a defined volume. This is made possible by the robust construction and high-quality materials that ensure high durability up to 500 watts RMS and impressive excursion capability. Such an application offers enormous flexibility in installation and integration into existing systems.

How is the LED lighting integrated into the Hertz HMS 12 B4-LD-C?

The Hertz HMS 12 B4-LD-C Marine Subwoofer features integrated LED lighting in the classic grille, allowing for visual adaptation to your ambient lighting. These LEDs are fully customizable, and the optional accessory HM RGB 1 BK provides additional control with a specially designed RGB controller and a remote control. This allows you to change the colors of the LEDs as desired and optimize them for different moods or occasions. The combination of powerful bass and customizable lighting makes the subwoofer a high-end device, both sonically and visually appealing, for boats of all kinds.

What are the technical specifications of the Hertz HMS 12 B4-LD-C regarding depth and size?

The Hertz HMS 12 B4-LD-C Marine Subwoofer has a depth of 191 mm, making it suitable for a variety of installation locations, especially in marine applications where space is often limited. The diameter is 300 mm, or 12 inches, which is a standard size for powerful subwoofers. These dimensions make the HMS 12 B4-LD-C an ideal choice for use in boats, where both compact size and high bass performance are required. The weight of a component is 7.6 kg, reflecting its robust construction, necessary for the special conditions on the water.

How do Thiele Small parameters affect the performance of the HMS 12 B4-LD-C?

The Thiele Small parameters such as resonance frequency (Fs) of 30 Hz and the total quality factor (Qts) of 1 contribute to the overall performance of the HMS 12 B4-LD-C. These parameters help predict how the subwoofer behaves in different applications. A Qts of 1 indicates that the subwoofer is optimized for free-air installations, while the low Fs of 30 Hz allows for deep bass output. The mechanical quality factor (Qms) of 11.1 and the electrical quality factor (Qes) of 1.1 influence the efficiency and sound of the subwoofer. Such detailed parameters assist the experienced technician in fine-tuning the system.

What material is used for the cone of the HMS 12 B4-LD-C and why?

The cone of the HMS 12 B4-LD-C Subwoofer is made of polypropylene, which is equipped with UV inhibitors. Polypropylene is known for its strength and resistance to moisture, making it an excellent choice for marine applications. The UV inhibitors protect the cone from harmful sun rays, which can be intense in the marine environment, preventing material degradation and discoloration. This material ensures that the subwoofer operates reliably even under harsh conditions and delivers consistent sound quality. The use of polypropylene cones is therefore particularly widespread and valued in the watersports sector.

How does the voice coil diameter affect the performance of the subwoofer?

The voice coil diameter of the HMS 12 B4-LD-C is 65.5 mm, which is crucial for durability and performance. A larger diameter supports better heat dissipation, which in turn allows for a higher continuous power handling of 500 watts RMS. This is especially important in strong bass applications where there is a risk of overheating. The larger voice coil also provides precise control of the cone and reduces distortion, especially at high volumes. This ensures that the subwoofer operates reliably and performs consistently even under demanding conditions.

What is the maximum linear excursion capability of the HMS 12 B4-LD-C and why is it important?

The maximum linear excursion, Xmax, of the HMS 12 B4-LD-C is 19 mm, highlighting the Subwoofer's ability to allow large diaphragm movements with minimal distortion. This specification is crucial for sound quality, as it ensures that the cone remains linear and precise even at high volumes, resulting in cleaner and distortion-free bass. Especially in open-air applications like on boats, a high excursion capability is advantageous to combat ambient noise while still producing powerful, deep bass sounds. This feature makes the Subwoofer particularly effective in challenging acoustic environments.

How is the integration of the HM RGB 1 BK accessory with the HMS 12 B4-LD-C done?

The HM RGB 1 BK accessory complements the HMS 12 B4-LD-C with a versatile RGB LED lighting option. This integration is made possible by an RGB controller specifically designed for the HMX LD models. Control is done via a convenient remote control that allows you to adjust the color display according to your mood or environment. This significantly enhances the aesthetic appearance of the Subwoofer on boats and can be installed quickly and easily. No complicated wiring is needed, as the system is specifically designed for integration with the Subwoofer. The accessory provides an impressive visual experience that harmonizes with the strong bass of the Subwoofer.

What frequency response specifications does the Hertz HMS 12 B4-LD-C have?

The frequency response of the Hertz HMS 12 B4-LD-C is remarkable, although the exact specifications are not detailed in the product description. However, it is designed to deliver powerful and deep bass in marine environments. Typically, Subwoofers in this category handle frequencies from about 20 Hz to 200 Hz to cover the lower range of the audio spectrum. The exact frequency response specification can be directly inquired from the manufacturer. Nevertheless, due to the unknown design and the focus on free-air installations, it is expected that the HMS 12 B4-LD-C will significantly enhance bass reproduction without additional enclosures.

Manufacturer information/responsible person

Elettromedia SpA
62018 Potenza Picena (MC)
Strada Regina km 3,500
Italy

Contact person:
Simone Iampieri
Executive Director Assistant
T +39 0733 870 813
Elettromedia SpA
62018 Potenza Picena (MC) Italy
Strada Regina km 3,500
T + 39 0733 870 870

Contact: simone.iampieri@elettromedia.it

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