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  5. U-Series v.2 15 Zoll

U-Series v.2 15 Zoll

1750 Watt

U-Series v.2 15 Zoll

Technical Highlights

  • 1750 watts RMS, 2 or 4 ohm dual voice coil.
  • 3-inch aluminum voice coils, excellent heat dissipation.
  • Optimized for bass reflex and bandpass enclosures, high sound pressure.
  • More technical details
€1,169.00
€1,169.00 €1,169.00
2% discount with credit card
Incl. VAT
Impedance: D1 (2x1 Ohm)
Estimated delivery Sep 14 to Sep 17.
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Product description

Discover the U-Series v.2 15-inch subwoofer from Sundown Audio, delivering deep bass with its powerful 38 cm size. With an impressive RMS power of 1750 watts and the option to choose between 2- or 4-ohm dual voice coils, this subwoofer offers versatility for various applications. The subwoofer is specially optimized for small bass reflex or bandpass enclosures, providing rich sound in compact spaces. Thanks to the 3-inch aluminum voice coil former, excellent heat dissipation is achieved. The heavy-duty cast basket and double-stitched surround ensure a robust construction. Convenient spring terminals allow for connection of cables up to 8 gauge. Performance is perfected by rear gap ventilation and cooling channels in the top plate.

Features

  • RMS 1750 watts
  • Dual voice coils with 2 or 4 ohms
  • Optimized for small bass reflex or bandpass enclosures
  • 3-inch aluminum voice coil former for excellent heat dissipation
  • High-temperature copper voice coil
  • Double-stitched surround
  • Heavy-duty cast basket
  • Spring terminals for cables up to 8 gauge
  • Sewn-in, heavy-duty tinsel leads
  • Massive pole with ventilation channels and aluminum shorting ring cap
  • Rear gap ventilation
  • Cooling channels in the top plate

Parameters

T/S SPECS UV.2 15 Inch D2 UV.2 15 Inch D4
RE (Ohms) 3.8279 6.0586
FS (Hz) 37.1918 36.4015
VAS (L) 43.5048 46.1027
Qes 0.5463 0.6170
Qms 5.4082 5.5975
Qts 0.4962 0.5557
Le (mH) 3.4147 4.6596
BL (NA) 26.7943 31.1468
Mms (Grams) 438.4924 431.9457
Cms (uM/N) 41.7623 44.2561
Sens (dB @ 1w/1m) 87.8716 87.3156
Xmax 30mm 30mm

Frequently asked questions about U-Series v.2 15 Zoll

What technical advantages do the 3-inch aluminum voice coils of the Sundown Audio U-Series v.2 offer?

The 3-inch aluminum voice coils of the Sundown Audio U-Series v.2 are crucial for heat dissipation and performance. Aluminum has an outstanding ability to efficiently dissipate heat due to its thermal conductivity. This keeps the performance of the Subwoofer stable even under heavy load. This is particularly important at power levels of up to 1750 watts RMS, as inadequate dissipation could lead to thermal failure. Additionally, the use of high-temperature copper in the coils provides extra safety against overheating. The voice coils are designed for robustness and durability, making this Subwoofer ideal for intense applications.

How is the compatibility of the Sundown Audio U-Series v.2 Subwoofer with vehicles ensured?

The compatibility of the Sundown Audio U-Series v.2 Subwoofer with vehicles is primarily ensured by its dimensions and enclosure optimization. With a diameter of 38 cm (15 inches), the Subwoofer is intended for use in small bass reflex or bandpass enclosures. This improves sound quality and bass depth. Installation requires sufficient space in the trunk or a specially designed box to meet the given specifications. A proper fit ensures that the Subwoofer can be perfectly integrated into the intended space configuration and achieves peak sound performance.

What do the Thiele/Small parameters mean for the performance of the U-Series v.2 Subwoofer?

The Thiele/Small parameters of the U-Series v.2, such as Qts, Vas, and Fs, define the acoustic properties and performance parameters of the Subwoofer. For example, the Subwoofer with 2-ohm coils has a Qts of 0.4962, a Vas of 43.5048 L, and a resonance frequency (Fs) of 37.1918 Hz. These values suggest that the Subwoofer can operate efficiently in smaller enclosures and is optimized for low frequencies. The Qes value affects electrical efficiency, while Qms affects the mechanical part. An average Qts value close to 0.5 indicates a good balance between bass quality and efficiency. These details assist in optimal enclosure development and sound tuning.

What role does the spring terminal technique play in the U-Series v.2 Subwoofer?

The spring terminal technique of the U-Series v.2 Subwoofer from Sundown Audio allows for the use of cables up to 8 gauge thick, ensuring a clean and durable connection. These terminals provide a robust and reliable connection that enhances sound quality by minimizing signal loss. Especially at high RMS power levels of up to 1750 watts, low contact resistance is crucial for performance. The use of high-load stranded wire, sewn onto the diaphragm, adds increased strength to meet even the most demanding requirements. The spring terminals support flexible installation options.

What advantages does the rear slot ventilation provide for the Sundown Audio U-Series v.2?

The rear slot ventilation of the Sundown Audio U-Series v.2, in conjunction with the cooling channels in the top plate, provides effective heat dissipation. This feature mitigates heat buildup, especially at high power levels, and prevents thermal overload. The cooling channels allow airflow that dissipates heat from the voice coil, ensuring that the reliability and performance of the Subwoofer are not compromised. Together with the aluminum voice coil former, heat dissipation is optimized to handle continuous loads at RMS power of 1750 watts without failures. Thus, at volume levels near the limits of performance, sound reliability is maintained.

How does the high-strength cast basket affect the sound quality of the U-Series v.2?

The high-strength cast basket of the U-Series v.2 Subwoofer serves to stabilize the speaker's structure against resonances and vibrations that could lead to losses in sound quality. This stabilizing property is crucial for performance during massive bass reproduction, especially in a subwoofer with an RMS power of 1750 watts. It ensures that the speaker does not undesirably give way in its mounting, which helps avoid unpleasant noises, particularly with intense bass. This keeps the sound clear and defined, without disturbances from mechanical modulations of the speaker body itself. This preserves the acoustic integrity of the system.

What impact does the massive pole with ventilation channels have on the sound of the Sundown Audio U-Series v.2?

The massive pole with ventilation channels in the Sundown Audio U-Series v.2 is a central element for the thermal stabilization of the system. These ventilation channels maximize air circulation in the voice coil region, allowing heat to be dissipated more quickly. This keeps the temperature within a safe range even during intense use, enabling the subwoofer to fully unleash its performance of 1750 watts RMS. Additionally, the aluminum short-circuit ring increases the efficiency of the coil, which reduces distortion and maintains a clear, delay-free sound. This is particularly important for preserving integral sound quality, especially at high volumes.

What specific features make the Sundown Audio U-Series v.2 Subwoofer optimal for small enclosures?

The Sundown Audio U-Series v.2 Subwoofer is optimally designed for small bass reflex or bandpass enclosures due to its specific parameters and construction. The Qts value of 0.4962, combined with a Vas of 43.5048 liters, demonstrates its suitability for compact enclosures that can still deliver deep and dynamic bass. The careful construction, such as the double-stitched surround and the robust cast basket, contributes to optimal sound reproduction without distortion. With its FS value around 37 Hz, the subwoofer is also optimized for low frequencies. All these specifications make the device an excellent choice for space constraints where sound performance must not be compromised.

How do the 2- or 4-ohm dual voice coils affect versatility in use?

The ability to choose between 2- or 4-ohm dual voice coils in the Sundown Audio U-Series v.2 offers users enhanced flexibility in adapting to different amplifier systems and amplifier power levels. With 2-ohm coils, the subwoofer achieves a lower overall impedance, allowing for more power from an amplifier with the same RMS output. Conversely, the 4-ohm variant provides increased safety and compatibility with higher impedance amplifiers. This adaptability opens up various installation possibilities and ensures that the subwoofer can be efficiently utilized in a wide range of audio system setups. Thus, the subwoofer can be integrated into different systems.

What role does the double-stitched surround play in the bass reproduction of the U-Series v.2?

The double-stitched surround of the U-Series v.2 Subwoofer plays a crucial role in mechanical stability and bass reproduction. It ensures that the diaphragm remains stable even at high excursions without risking contact wear. This guarantees that low frequencies are reproduced clearly and without distortion. Especially under high loads, as the subwoofer can achieve an RMS power of up to 1750 watts, the movement of the diaphragm is optimally guided. The precise control of diaphragm movement leads to clearer and more precise low frequencies, enhancing the overall sound image.

Manufacturer information / responsible person

JR Labs
Rainer Jakob
Heinrich-Hertz-Straße 13 A
46325 Borken
Germany

Contact: jakobrainer@jr-labs.eu