Hertz HMS 10 B2-LD-C boat subwoofer

Subwoofer for Boat Hertz HMS 10 B2-LD-C

Marine subwoofers Hertz HMS 10 B2-LD-C with a diameter of 10” are designed for endless placement possibilities. The 2 Ω configuration maximizes the amplifier's power. It eases the main speakers from the hard work of reproducing the lowest frequency range, adding bass output and punch to maximize the system's overall performance. The high-performance mobile device HMS 10 B with a 50mm (2”) MKP optimized voice coil is driven by a massive magnet assembly to achieve perfect control even at very high SPL levels. Designed and tested for real-world environments (UV, salt fog, vibrations, water spray, thermal shock, dust). HMS 10 B2-LD-C is super resistant to environmental influences. The progressive spider design made of aramid fibers with silicone-insulated wires ensures durability and consistent performance over time. Gold-plated brass terminals resistant to corrosion with a silicone cover protect the wire connection point.

About the Brand

The most famous European brand in the car hifi segment? Hertz audio! It is a brand that was established in 1998 in Italy. Hertz is part of Elettromedia, which owns Hertz, Audison, and Connection. How was the name Hertz created? Hertz - a unit of frequency, cycles per second (Hz). Everything in Hertz car audio reflects their passion for music, and they care about everything they produce. Over the years, this company has built an excellent team of talented and passionate engineers committed to designing products at the highest level. Every new project and product primarily stems from the needs of the brand's fans and is developed to directly connect them with the emotional power of music. The brand's philosophy is a unique combination of premium sound, vibrant tradition, sophisticated innovation, and high quality, combined in a complete range of products for maximum customer satisfaction. Hertz offers a complete product line of speakers, amplifiers, and subwoofers that allow you to experience the thrill of high-quality sound in any situation. Deep knowledge of car interior acoustics, design requirements, and manufacturing processes keeps Hertz products at a high level. To achieve Hertz's high-quality standards, the company does not settle for testing samples from each batch: it uses the most advanced testing tools to analyze each component through a computer-controlled process overseen by highly qualified personnel. This results in a negligible complaint rate and high quality of all Hertz products.

Catalog number	HMS 10 B2-LD-C
Brand	Hertz
Links	Official web presentation
RMS powerThe RMS power of the subwoofer is the constant power of continuous use of the subwoofer. If the power is exceeded for a longer period of time, irreversible damage may occur, or to burn out the voice coil of the subwoofer.	300 W
Max. (maximum performancePeak performance , which the subwoofer can play momentarily (approx. 0.5 s), for example when hitting drums in a song. If the maximum power is exceeded, damage can quickly occur, or to burn out the voice coil of the subwoofer.	600 W
Sensitivity (SPL 2.83V/1m)Subwoofer sensitivity or efficiency. The sensitivity of the subwoofer is given in decibels (dB) and, in simple terms, means that the higher the value, the lower the demands on the power of the amplifier. This is a de facto rating of how a subwoofer converts watts to sound. Sensitivity ratings are in noise level measured at 1 meter from the subwoofer using 1 W (watt of power) or using 2.83 volts at the source at 1 meter. A higher decibel level means the subwoofer is louder with less power. For every 3 dB increase in sensitivity, the subwoofer requires half the power to reproduce the same volume. For example, if an 88 dB subwoofer needs 300 Watts to produce a certain volume, then a subwoofer with 91 dB sensitivity needs only 150 Watts to reach the same efficiency.	88.5 dB
ImpedanceImpedance - measurement of electrical resistance. When buying a subwoofer, it is very important that everyone make sure that the impedance matches the amplifier that you are connecting to it. For subwoofers with a double voice coil, we recommend following the information in the advice center! Example: A 2 Ohm subwoofer cannot be connected to an amplifier that is only stable up to 4 Ohms. A 4 Ohm subwoofer can easily be used on an amplifier that is stable up to 2 Ohms. Connecting a 4 Ohm subwoofer to an amplifier that is stable up to 4 Ohms also without problems. The most common subwoofer impedance is 4 Ohm.	2 Ω
Subwoofer diameterThe diameter of the subwoofer is indicated on the screw holes. The overall outer diameter of the subwoofer is usually 1-2 cm wider, depending on the size category of the subwoofer. For a 30 cm subwoofer, the outer diameter incl. protective rubber 31.8 cm and in the 25 cm subwoofer it is 26.5 cm incl. protective rubbers.	250 mm (10\")
Subwoofer mounting depthThe mounting depth of the subwoofer is measured from the bottom edge of the magnet to the bottom edge of the subwoofer's metal or cast basket.	116 mm
Fs - resonant frequencyFs - is the lower resonant frequency. This parameter is the de facto free air resonant frequency of the subwoofer. Simply put, it is the point at which the weight of the subwoofer's moving parts equals the force of the subwoofer's suspension while it is in motion. If you've ever seen a piece of string start to hum uncontrollably in the wind, you've seen the effect of reaching a resonant frequency. The weight of the moving parts and the stiffness of the suspension (surround and spider) are key elements that affect the resonant frequency. As a general rule, a lower Fs indicates a subwoofer that would be better at reproducing low frequencies than a subwoofer with a higher Fs. However, this is not always the case, as other important parameters of the subwoofer also enter the resulting sound.	43 Hz
Vas - equivalent volume of airVas - represents the volume of air that, when compressed per cubic meter, acts with the same force as compliance (CMS), suspension in a certain subwoofer. Vas is one of the most complicated parameters to measure, as changes in air pressure are affected by conditions of relative humidity and temperature. Another way to describe what VAS is: try using a subwoofer and find a baffle that is the right size to return the air with the same stiffness to the same resonance. The size of this box is equal to you. There are, of course, other parameters, but they are not so necessary for the exact calculation of the enclosure. Resonance frequency and Q-parameter values are also important when building enclosures.	30.46 l
Xmax + -Xmax - the maximum deflection of the subwoofer diaphragm in one direction – it is not a sum, or an abbreviation for the maximum linear deflection. The subwoofer output becomes non-linear as the voice coil begins to leave the magnetic gap.	12.3
QesElectrical Q-factor of driver is the electrical quality factor (electrical damping). If the subwoofer coil moves in a magnetic field, it generates its own current that counteracts its movement. Qes is a dimensionless parameter and the lower the number, the higher the generated current and the more damped the coil movement, thus reducing the total current flowing through the coil, the deflection and the sensitivity around the fs resonance. It varies in values from 0.08 to 0.6, in the extremes, for ordinary universal converters, even 20. Subwoofers with too low a Qes value, a very damped system, are not suitable for certain types of enclosures.	0.63
QmsMechanical Q-factor of driver is a mechanical factor of quality (mechanical damping). These are mechanical losses affecting (damping) the movement of the subwoofer membrane. Qms is a dimensionless parameter and the higher the number, the smaller the losses, i.e. the deviation and sensitivity in the lower band is also higher, it ranges around 0.4 - 25.	12.3
QtsTotal Q-factor of driver is a total quality factor, it includes both parameters Qes and Qms (electrical Qes and mechanical Qms). It varies in values from approx. 0.08 to 0.6, exceptionally up to 3. The Qts of the subwoofer is calculated in the same way as, for example, a pair of parallel resistors, so the result is decisively influenced by a smaller value that cannot be exceeded, which is usually Qes.	0.6
Subwoofer voice coil diameterThe larger the diameter of the voice coil, the more load capacity the subwoofer has, in layman's terms.	50 mm
Subwoofer diaphragm materialThe specific material from which the subwoofer membrane is made.	Polypropylene with UV inhibitors
MassSubwoofer weight in kilograms. The weight is usually given net, i.e. without packaging.	6 kg
Other	Resistant to corrosion, UV radiation, salt spray and jetting water (IP65)