HMX 7.7 S-LD-SW.2

Name: Hertz HMX 7.7 S-LD-SW.2 8" Marine Coaxial | Masori
Brand: Hertz
Price: 379.0 EUR
Availability: InStock

100 Watt

HMX 7.7 S-LD-SW.2

Technical Highlights

Power output of 100 W RMS, impedance at 4 Ohms, frequency 45-25,000 Hz.
Peak power handling 200 W Peak, tweeter diameter 36 mm.
Voice coil 32 mm, magnet material ferrite and neodymium, weight 1.66 kg.
More technical details

€379.00

~~€379.00~~ €379.00

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datasheet

€379.00

~~€379.00~~ €379.00

The HMX 7.7 S-LD-SW.2 from Hertz is an 8" (20 cm) coaxial speaker system that impresses with its versatility and power. With a 2-way coaxial system, a frequency range of 45 – 25,000 Hz, and an impedance of 4 Ohm, it offers a wide sound variety. The speaker has a continuous power handling of 100 W RMS and a peak power handling of 200 W Peak. The materials of the system include a neodymium tweeter and a polypropylene diaphragm reinforced with UV inhibitors. Weighing 1.66 kg, the speaker ensures stable and durable sound performance.

Technical specifications

Model type: 2-way coaxial system
Chassis size: 7.7 inches
Continuous power handling: 100 W RMS
Peak power handling: 200 W Peak
Impedance: 4 Ohm
Frequency range: 45 – 25,000 Hz
Tweeter diameter: 36 mm
Mid-bass voice coil diameter: 32 mm
Tweeter voice coil diameter: 20 mm
Mid-bass magnet material: Ferrite (High-Density)
Tweeter magnet material: Neodymium
Mid-bass magnet size: 90 x 40 x 20 mm
Tweeter magnet size: 19.7 x 3 mm
Diaphragm material: Polypropylene with UV inhibitors
Tweeter dome material: PEI
Maximum mechanical excursion (Xmech): +/- 8.5 mm
Weight per speaker: 1.66 kg

Electro-acoustic parameters (TSP)

Effective diaphragm diameter (D): 146 mm
Maximum linear excursion (Xmax): 6 mm
DC resistance (Re): 3.3 Ohm
Resonance frequency (Fs): 60 Hz
Voice coil inductance (Le): 0.56 mH
Equivalent volume (Vas): 12.50 l
Moving mass (Mms): 22 g
Suspension compliance (Cms): 0.32 mm/N
Force factor (BL): 6 Tm
Total quality (Qts): 0.72
Electrical quality (Qes): 0.76
Mechanical quality (Qms): 11.8
Reference sound pressure level (SPL): 91 dB

Dimensions

Technical line drawing, side view of the 2-way coaxial speaker Hertz HMX 7.7 S-LD-SW.2 with labeled dimensions A, B, C, D, and F.

A 196 mm
B 158 mm
C 113 mm
D 79 mm
F 34 mm

Frequency response

Frequency response graph of the Hertz HMX 7.7 S-LD-SW.2 8-inch coaxial speaker: Sound pressure level SPL as a function of frequency, on-axis and at 45°; impedance peak at about 60 Hz, SPL peak at ~1000 Hz on-axis.

Frequently Asked Questions about HMX 7.7 S-LD-SW.2

What are the technical specifications of the Hertz HMX 7.7 S-LD-SW.2 coaxial system?

The Hertz HMX 7.7 S-LD-SW.2 coaxial system is a 2-way speaker system with a chassis size of 7.7 inches. It offers a continuous power handling of 100 W RMS and a peak power handling of 200 W Peak. The impedance of the system is 4 Ohm and it covers a frequency range of 45 – 25,000 Hz. The diameter of the tweeter is 36 mm, while the voice coil diameter of the mid-woofers is 32 mm and that of the tweeter is 20 mm. The mid-woofers use a ferrite magnet sized 90 x 40 x 20 mm, while the tweeter is equipped with a neodymium magnet of 19.7 x 3 mm. The diaphragm material is polypropylene with UV inhibitors and the tweeter dome is made of PEI.

What frequencies does the HMX 7.7 S-LD-SW.2 speaker system cover?

The Hertz HMX 7.7 S-LD-SW.2 coaxial system covers a wide frequency range from 45 Hz to 25,000 Hz. This allows for the reproduction of both deep bass and high, clear treble. Notably, the combination of the effective diaphragm diameter of 146 mm and a tweeter diameter of 36 mm ensures that sound transmission is even and detailed across the entire spectrum. The resonance frequency is at 60 Hz, which ensures additional bass precision. If you are looking for a speaker that delivers both deep and crystal-clear high frequencies, this could be ideal.

What are the Thiele-Small parameters of the Hertz HMX 7.7 S-LD-SW.2?

The Hertz HMX 7.7 S-LD-SW.2 has several crucial Thiele-Small parameters. The effective diaphragm diameter is 146 mm, while the maximum linear excursion (Xmax) is specified at 6 mm. The DC resistance (Re) is at 3.3 Ohm. An important resonance frequency is at 60 Hz, with a voice coil inductance of 0.56 mH. Additionally, the equivalent volume (Vas) is 12.50 liters and the moving mass (Mms) is 22 g. Particularly impressive is the force factor (BL), which is measured at 6 Tm, and the total quality factor (Qts) is at 0.72.

What is the maximum mechanical excursion of the HMX 7.7 S-LD-SW.2?

The Hertz HMX 7.7 S-LD-SW.2 has a maximum mechanical stroke (also known as Xmech) of +/- 8.5 mm. This value is crucial for the diaphragm's ability to displace at high volumes. Such a mechanical stroke allows the speaker to move air properly even with dynamic audio cues, without causing distortion or leading to mechanical damage. When choosing a speaker for loud music or home theater applications, you should pay attention to a high Xmech value to ensure dynamic, powerful sound.

What materials are used in the Hertz HMX 7.7 S-LD-SW.2?

The Hertz HMX 7.7 S-LD-SW.2 uses high-quality materials for excellent sound properties and durability. The Mid-woofers consist of a ferrite magnet (high-density) and a polypropylene diaphragm with UV inhibitors, which increases resistance to environmental influences. The Tweeter is made of neodymium for the magnetic structure and PEI as the dome material. This combination of materials ensures clear, precise sound across the entire frequency spectrum and protects the speaker components from wear, which is particularly advantageous in demanding environments.

How does the 4 Ohm impedance affect the performance of the HMX 7.7 S-LD-SW.2?

With an impedance of 4 Ohm, the Hertz HMX 7.7 S-LD-SW.2 coaxial system is designed to efficiently draw power from the Amplifier. A low-impedance like this allows for powerful audio playback with a higher sound pressure level, ideal for applications where high volume and dynamics are required. The rated sound pressure level is 91 dB, which harmonizes well with this impedance and operates the speaker efficiently without overloading the amplifier. The low electrical quality factor of 0.76 further complements this performance.

How do the dimensions of the HMX 7.7 S-LD-SW.2 fit in various cars?

The HMX 7.7 S-LD-SW.2 coaxial system from Hertz has specific dimensions that need to be considered during installation. The outer diameter is 196 mm, with a B dimension of 158 mm and a depth of 79 mm. The back of the speaker, referred to as dimension D, has a depth of 113 mm. To ensure compatibility, it is important to check the existing speaker openings against these dimensions. Especially in vehicles with custom installation openings, this speaker system may fit due to its universal dimensions, but be sure to check this in advance.

What is the sound pressure level (SPL) of the Hertz HMX 7.7 S-LD-SW.2?

The sound pressure level (SPL) of the Hertz HMX 7.7 S-LD-SW.2 is 91 dB. This value indicates the efficiency of the speaker, meaning how loud it is when operated at a certain power level. An SPL of 91 dB means that the speaker produces a solid sound pressure at the corresponding power output, which ensures a powerful and dynamic audio playback. This is particularly advantageous in environments where loud and clear sound reproduction is required, whether for outdoor audio installations or loud music in the car.

How is the frequency response of the Hertz HMX 7.7 S-LD-SW.2 represented?

The frequency response of the Hertz HMX 7.7 S-LD-SW.2 shows how well the speaker reproduces different frequencies. It is represented as a curve that depicts the frequency range from 45 Hz to 25,000 Hz, where the speaker delivers consistent sound performance. The wide frequency range covers both deep bass and clear highs. A smooth curve without significant drops or peaks indicates that the speaker reproduces the frequency response smoothly, which is essential for high-quality audio playback. Such representations help you understand how the speaker performs at various frequencies.

What role does the diaphragm material play in the sound quality of the Hertz HMX 7.7 S-LD-SW.2?

The Hertz HMX 7.7 S-LD-SW.2 uses polypropylene with UV inhibitors for the diaphragm. This material is crucial for sound quality, as polypropylene is lightweight and stiff, allowing for efficient and distortion-free sound transmission. The UV inhibitors protect the diaphragm from deformation due to sun exposure, which is particularly important for outdoor applications or in vehicles. The resistance to environmental influences ensures that the sound remains consistent throughout the speaker's lifespan. The choice of material enables the speaker to accurately reproduce durable sounds with a wide frequency range and resilience.

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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