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Technical Highlights

  • 75W RMS, 4 ohm impedance, 150W peak, 50-25k Hz frequency.
  • UV-resistant polypropylene membrane, Santoprene rubber surround.
  • Aramid centering, silicone insulated connecting wires, durable.
  • More technical details
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Normal price €153,30
Normal price -30% €219,00 Selling price €153,30
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Normal price €153,30
Normal price €219,00 Selling price €153,30

HMX 6.5-TW (B-stock) by Hertz

The Hertz HMX 6.5-TW (B-stock) is a technically flawless marine coaxial speaker with a diameter of 6.5 inches (16.5 cm). The system has an RMS power handling of 75 watts and a peak power handling of 150 watts at an impedance of 4 ohms. The construction includes a UV-resistant polypropylene diaphragm with a Santoprene rubber surround, as well as a 1.4-inch neodymium tweeter with a PEI dome. A high-density ferrite magnet drives the woofer, while an aramid fiber spider with silicone-insulated connection wires supports mechanical stability. The speaker is protected from environmental influences by a stainless steel tweeter grille and a marine-grade polymer basket.

Features
  • 6.5 inches (16.5 cm) coaxial speaker
  • Power handling: 75 watts RMS
  • Power handling: 150 watts peak
  • Impedance: 4 ohms
  • Polypropylene diaphragm with UV inhibitors
  • Santoprene rubber surround
  • 1.4-inch neodymium tweeter with PEI dome
  • High-density ferrite woofer magnet
  • Aramid fiber spider with silicone-insulated connection wires
  • Sound-transparent stainless steel tweeter grille
  • Injection-molded marine-grade polymer basket
  • Gold-plated corrosion-resistant terminals
  • Sealed crossover with solid-state tweeter protection
Technical Specifications
  • Frequency response: 50 Hz - 25,000 Hz
  • Mounting depth: 95.6 mm
  • Overall diameter (A): 172.2 mm
  • Mounting diameter (B): 128 mm
  • Overall depth (C): 95.6 mm
  • Mounting depth (D): 69 mm
  • Protrusion (F): 26.6 mm
  • Tweeter diaphragm: 36 mm
  • Woofer voice coil diameter: 25 mm
  • Tweeter voice coil diameter: 20 mm
  • Woofer magnet size: 78.5 x 32 x 17 mm
  • Tweeter magnet size: 19.7 x 3 mm
  • Weight per speaker: 1 kg
  • Xmech: ±6.65 mm
  • Fs: 65 Hz
  • Vas: 8.8 liters
  • Mms: 14 g
  • Spl: 89 dB
  • Re: 3.5 ohms
  • Qts: 0.7

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Hertz HMX 6.5-TW (B-stock) Datasheet

Frequently Asked Questions about HMX 6.5-TW (B-stock)


What technical features does the Hertz HMX 6.5-TW marine speaker have?

The Hertz HMX 6.5-TW is a 6.5-inch marine coaxial speaker. Its outstanding technical features include a 1.4-inch neodymium tweeter with a PEI dome for optimal off-axis radiation and high sound pressure level. The diaphragm is made of UV-resistant polypropylene with a Santoprene rubber surround. Other features include: capable of handling up to 75 watts RMS and 150 watts peak, 4 ohm impedance, and a frequency response of 50 Hz to 25 kHz. The woofer uses a 25 mm voice coil and amplitudes of ±6.65 mm. Its robust design ensures protection against environmental conditions and high acoustic performance.

How does the HMX 6.5-TW ensure clear audio playback?

The Hertz HMX 6.5-TW marine coaxial speaker provides clear audio playback through various optimized technical components. The neodymium tweeter is designed to achieve the best possible off-axis radiation through the front plate and acoustic lens. This, combined with a high-quality, sound-transparent stainless steel grille, ensures efficient high-frequency transmission. The polypropylene diaphragm with UV inhibitors is equipped with a Santoprene surround to minimize vibrations and environmental influences, ensuring clear and distortion-free sounds. Additionally, the aramid fiber spider with silicone-insulated connection wires ensures durability and consistent performance.

In what environment is the HMX 6.5-TW best suited?

The Hertz HMX 6.5-TW marine coaxial speaker is specifically designed and tested for harsh environments. It is resistant to UV radiation, salt mist, splashes, vibrations, temperature shocks, and dust, making it ideal for use on boats and in coastal areas. The diaphragm made of UV-resistant polypropylene, which is surrounded by robust Santoprene rubber, ensures reliable operation under extreme conditions. The sturdy grille system provides additional protection. Equipped with gold-plated, corrosion-resistant terminals, the speaker is designed to withstand the most demanding marine challenges without compromising sound quality.

What materials are used in the HMX 6.5-TW by Hertz?

The Hertz HMX 6.5-TW marine coaxial speaker uses high-quality, durable materials: The diaphragm is made of UV-resistant polypropylene, and the Santoprene rubber surround provides protection and elasticity. The neodymium tweeter with a PEI diaphragm creates a robust design for intense audio performance. The aramid fiber spider with silicone-insulated connection wires ensures longevity and lasting performance. Its sound-transparent stainless steel grille effectively protects the delicate parts and enhances the speaker's aesthetics. This choice of materials guarantees durability and performance even under demanding conditions.

How does the frequency response of the HMX 6.5-TW affect sound quality?

The Hertz HMX 6.5-TW has a frequency response of 50 Hz to 25 kHz, ensuring a wide coverage from low to very high tones. This range allows both bass and the finest high-frequency details to be reproduced accurately, creating a rounded and full sound experience. The combination of a neodymium tweeter with a PEI diaphragm and a long-stroke woofer with a 25 mm voice coil ensures that the entire frequency range remains clear and distortion-free. This technical tuning allows you to enjoy every detail of your music, whether you prefer loud or soft sounds.

What features does the tweeter of the HMX 6.5-TW offer?

The tweeter of the Hertz HMX 6.5-TW is a 1.4-inch neodymium magnet tweeter that uses a PEI diaphragm with a specially designed front plate to achieve the highest off-axis radiation and maximum sound pressure level. This combination provides precise high-frequency reproduction, which is particularly effective in open environments like boats. The acoustic lens in the tweeter further optimizes sound distribution and ensures a consistent sound experience, while the sound-transparent stainless steel grille protects the tweeter and delivers clear, undistorted sound.

How is the installation of the HMX 6.5-TW simplified?

The installation of the Hertz HMX 6.5-TW marine coaxial speaker is remarkably easy, thanks to its well-designed construction and thoughtful dimensions. With a diameter of 165 mm and a mounting depth of 95.6 mm, the speaker can be easily installed in standardized speaker cutouts. It is recommended to mount the speaker in positions with adequate protection and placement space to optimize its performance. The corrosion-resistant gold-plated terminals ensure a secure connection even in damp conditions. This guarantees easy adaptation to various marine and outdoor applications.

What is the power handling of the HMX 6.5-TW from Hertz?

The Hertz HMX 6.5-TW is designed for various applications and offers a power handling of up to 75 watts RMS. At peak, it can handle up to 150 watts, allowing it to reproduce intense volumes without distortion. These power handling values are optimal for use in marine environments, where irregular audio passages can occur. The stable performance of the speaker is supported by its robust construction and high-quality materials, such as the polypropylene diaphragm and aramid centering, which can withstand consistently high levels.

How does the HMX 6.5-TW protect against environmental influences?

The Hertz HMX 6.5-TW marine coaxial speaker is optimally protected against environmental influences. The speaker features a waterproof polypropylene diaphragm equipped with a UV inhibitor to prevent sun damage. A Santoprene surround provides additional protection against water and dust. The stainless steel grille not only secures the base components against physical damage but also protects against corrosive elements. These features make the HMX 6.5-TW resistant to salt mist and other environmental stresses, ideal for use in marine and open environments with consistently stable performance.

How do the TSP of the HMX 6.5-TW affect the sound?

The Thiele-Small parameters (TSP) of the Hertz HMX 6.5-TW, such as Qts 0.7, Fs 65 Hz, and Vas 8.8, significantly shape the sound characteristics. A Qts value of 0.7 indicates a balanced bass response that is neither too boomy nor too flat, ideal for portable sound transducers. The resonance frequency value Fs of 65 Hz means that the speaker can accurately handle low tones, while the Vas of 8.8 indicates the air displacement capabilities in the enclosure. Combined, these parameters produce a stable and rich acoustic with controlled bass reproduction and clear highs, optimized for use in infinite baffle applications.

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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