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  5. Uno S 300 S4

Uno S 300 S4

250 Watt

Uno S 300 S4

Technical Highlights

  • Continuous power of 250 W, impedance at 4 ohms, peak power 1000 W.
  • Voice coil Ø 38 mm, magnet size 134x45x34 mm, ferrite magnet.
  • 258 mm diameter, lacquered pressed paper pulp as diaphragm material.
  • More technical details
€72.11
-9% €79.00 €72.11
2% discount with credit card

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ProductUno S 300 S4

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Hertz-Uno S 300 S4-12" (30cm) Subwoofer-masori-kaufen
€72.11
€79.00 €72.11

The Uno S 300 S4 from Hertz is a 12-inch Subwoofer with a continuous power handling of 250 Watts RMS and a peak power of 1000 Watts. The system has an impedance of 4 Ohms and a 38 mm voice coil. The technical features include a ferrite magnet with high flux density and a coated pressed paper diaphragm. The physical construction has a weight of 3 kg and an Xmech value of ±15.1 mm. With a sound pressure level of 89.5 dB, the model is designed for integration into various acoustic systems.

Features
  • 12-inch (30 cm) Subwoofer
  • Continuous power handling: 250 Watts RMS
  • Peak power: 1000 Watts
  • Impedance: 4 Ohms
  • 38 mm voice coil
  • Ferrite magnet with high flux density
  • Diaphragm made of coated pressed paper
  • Weight: 3 kg
  • Xmech: ±15.1 mm
Technical Specifications
  • Magnet size: 134 x 45 x 34 mm
  • Effective diaphragm diameter (D): 258 mm
  • Xmax: 9.1 mm
  • DC resistance (Re): 3.6 Ohms
  • Resonance frequency (Fs): 33 Hz
  • Equivalent volume (Vas): 82.2 l
  • Moving mass (Mms): 112 g
  • Compliance (Cms): 0.21 mm/N
  • Force factor (BL): 11.3 Tm
  • Total Q factor (Qts): 0.6
  • Electrical Q factor (Qes): 0.65
  • Mechanical Q factor (Qms): 7.8
  • Sound pressure level (Spl): 89.5 dB
  • Outer diameter (A): 307 mm
  • Mounting diameter (B): 280 mm
  • Total height (C): 128 mm
  • Mounting depth (D): 121 mm

Frequently Asked Questions about Uno S 300 S4

What are the technical specifications of the Hertz Uno S 300 S4 Subwoofer?

The Hertz Uno S 300 S4 Subwoofer has a size of 300 mm and an impedance of 4 Ohms. It can achieve a continuous power handling of 250 Watts and a peak power of 1000 Watts. The voice coil has a diameter of 38 mm. The magnet is made of high flux density ferrite and measures 134 mm x 45 mm x 34 mm. The weight of the component is 3 kg, and the diaphragm is made of coated pressed paper pulp. The maximum mechanical stroke (Xmech) is ±15.1 mm.

What is the maximum stroke and voice coil height of the Uno S 300 S4?

The Hertz Uno S 300 S4 Subwoofer has a maximum mechanical stroke (Xmech) of ±15.1 mm, which represents a significant displacement for a subwoofer of this category. Additionally, the maximum linear stroke (Xmax) is 9.1 mm, highlighting the subwoofer's ability to reproduce deep frequencies with high precision. The voice coil height, a central parameter that affects power handling and efficiency, is also an important 38 mm, ensuring that performance remains stable even at high volumes.

What electro-acoustic specifications does the Uno S 300 S4 have?

The Hertz Uno S 300 S4 offers a variety of electro-acoustic specifications: The efficiency factor (D) is 258 mm, the resonance frequency (Fs) is 33 Hz, indicating deep bass capabilities. The mechanical compliance (Cms) is 0.21 mm/N and the Mms, or moving mass, is 112 g. The subwoofer has an equivalent air volume (Vas) of 82.2 liters. The BL factor, which indicates the ratio of magnetic flux to voice coil length, is 11.3 T*m. The total quality factor (Qts) is 0.6, which, combined with a Qes of 0.65 and a Qms of 7.8, promises balanced reproduction.

What frequencies can the Hertz Uno S 300 S4 reproduce?

The Hertz Uno S 300 S4 Subwoofer is capable of delivering extensive bass reproduction with a resonance frequency (Fs) of 33 Hz, indicating that it is optimized to reproduce lower frequencies with high accuracy. With such a low Fs frequency, the Subwoofer can be excellently integrated into audio systems that require rich bass performance, especially when deep, resonant tones are desired. In combination with a high load capacity, the Uno S 300 S4 can produce remarkable sound depth in both continuous and peak operation.

Are there installation instructions for the Uno S 300 S4?

The Hertz Uno S 300 S4 can be flexibly installed thanks to its dimensions (outer 307 mm, cutout diameter 280 mm, installation depth 128 mm). To achieve optimal sound and minimize vibrations, the Subwoofer should be securely mounted in an enclosure that matches the specified dimensions. The installation depth of 128 mm requires adequately sized installation in the vehicle to avoid space constraints. It is also important to ensure that the Subwoofer is always correctly connected to the Amplifier, taking into account the impedance of 4 Ohms to ensure maximum performance.

How do I design the appropriate enclosure for the Uno S 300 S4?

The appropriate enclosure for the Hertz Uno S 300 S4 should be tailored to its specific technical specifications, particularly regarding the equivalent volume (Vas) of 82.2 liters. Enclosures with optimal volume allow the Subwoofer to perfectly round off its resonance frequency (Fs) of 33 Hz and maximize bass performance. The installation depth of 128 mm and the cutout diameter of 280 mm should, of course, be taken into account. While a sealed enclosure ensures precise bass reproduction, a bass reflex enclosure offers advantages in volume at low frequencies, making the most of the maximum mechanical displacement volume.

How does the BL factor affect the performance of the Uno S 300 S4?

The BL factor of the Hertz Uno S 300 S4 is 11.3 T*m and is an important indicator of the electrical and mechanical force acting on the voice coil. A high BL value indicates a strong driving force of the magnet in relation to the voice coil length, which enhances the Subwoofer's ability to produce energetic bass reproduction. Especially in applications where high volumes or fast transient inputs are required, such as in powerful audio systems, a high BL factor is crucial for clean and clear reproduction of bass impulses.

What role does the membrane of the Uno S 300 S4 play in the sound?

The membrane of the Hertz Uno S 300 S4 is made of a coated press paper pulp, characterized by its lightweight and rigid structure, which is necessary to ensure quick responsiveness with minimal distortion. This material is optimal for Subwoofers that reproduce low frequencies with high load capacity and precision. The lightweight structure minimizes unwanted inertia effects, while the rigidity ensures distortion-free vibrations. In combination with the high-flux ferrite magnet, precise bass performance is achieved, qualifying the Uno S 300 S4 for demanding sound configurations in cars.

Does the Uno S 300 S4 fit in my car?

Whether the Hertz Uno S 300 S4 fits in your vehicle depends on the installation dimensions of the vehicle. With an outer diameter of 307 mm and an installation diameter of 280 mm, you will need a suitable space in the trunk or another adaptable position. The installation depth of 128 mm should be considered to avoid potential restrictions in the vehicle space. Before modification or installation, it is advisable to compare the vehicle dimensions with the dimensions of the Subwoofer to ensure that the installation can be done without modifications and that the Subwoofer can fully unleash its performance.

What load capacity values does the Uno S 300 S4 from Hertz have?

The Hertz Uno S 300 S4 is designed for a continuous load capacity of 250 watts, meaning it can handle this power over extended periods under normal conditions without overheating or power loss. The peak power is an impressive 1000 watts, allowing the Subwoofer to manage short-term power peaks that occur when playing music with particularly high dynamic range. These performance specifications are crucial when integrating the Subwoofer into powerful car Hi-Fi systems that demand high bass pressure and volume.

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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