3. HI-DEF SL608

HI-DEF SL608

HI-DEF SL608

Technical Highlights

  • Load capacity 300 W RMS, impedance 2 x 2 Ohm voice coil.
  • Sensitivity at 84 dB SPL, installation depth is 89 mm.
  • Voice coil 51 mm, frequency response starts at 34 Hz.
  • More technical details
€189.00
€189.00 €189.00
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ProductHI-DEF SL608 · D2

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DD Audio-HI-DEF SL608-8" (20cm) Subwoofer-masori-kaufen
€189.00
€189.00 €189.00

The DD Audio SL608 is an 8-inch Subwoofer that impresses with its compact design and powerful, deep bass. With a mounting depth of only 89 mm, it is ideal for vehicles with limited space. The Subwoofer features a D2 dual voice coil, allowing for flexible wiring options, and is designed for both sealed and vented enclosures. High-quality materials such as a three-layer composite sandwich cone and a Santoprene rubber surround ensure clear, distortion-free sound. With a power handling of 300 W RMS and a sensitivity of 84 dB SPL, the SL608 offers maximum system adaptability with minimal space requirements.

Features

  • Compact design with 89 mm mounting depth
  • 134 mm motor diameter with 25 mm magnet
  • Three-layer composite sandwich cone
  • Santoprene rubber surround for distortion-free sound
  • D2 dual voice coil for flexible wiring
  • Optimized for sealed and vented enclosures

Technical Specifications

  • Size 21 cm
  • Power handling 300 W RMS / 900 W Peak
  • Impedance 2 x 2 Ohm voice coil
  • Voice coil 51 mm
  • Piston area 165 mm²
  • Frequency response 34 Hz
  • Sensitivity 84 dB SPL
  • Xmax 12 mm / Xmech 38 mm
  • Mounting diameter 187 mm
  • Mounting depth 89 mm
  • Recommended enclosure sizes
    • Sealed 8.5 – 19.8 liters
    • Ported 11.3 – 28.3 liters
  • Woofer displacement 1.13 liters
  • Weight 5 kg

Frequently Asked Questions about HI-DEF SL608

What makes the DD Audio SL608 space-saving in a vehicle?

Its compact design is primarily due to the low installation depth of only 89 mm, allowing for easy installation even in tight vehicle configurations. Additionally, the relatively lightweight motor structure with a 25 mm magnet contributes to a space-saving construction without sacrificing deep bass performance. Especially if you enjoy listening to loud music and value intense bass performance, you will benefit from the comparatively small installation size, as the module can be flexibly used in sealed or vented enclosures. In contrast to larger woofers, the slim profile allows for significantly more versatile positioning in the vehicle, giving you more space for other components. With a 51 mm voice coil diameter, the sub can generate sufficient excursion without taking up excessive space.

In which enclosure types can this 8-inch subwoofer be optimally used?

Regarding enclosure selection, it is recommended to use sealed constructions with a volume between 8.5 and 19.8 liters if you prioritize precise and tight bass reproduction. For a stronger deep bass at higher sound pressure, vented constructions in a range of 11.3 to 28.3 liters can be realized, providing you with a solid compromise between sound fidelity and level reserves. The DD Audio SL608 features a three-layer composite sandwich membrane that performs well in both compact and more spacious enclosure concepts. Thanks to the flexibility of the D2 dual voice coil, you can easily connect to different amplifier impedances. The reduced installation depth also facilitates installation in tight spaces.

What is the RMS power of the DD Audio SL608 and what does that mean for the level reserves?

The subwoofer achieves a constant power handling of 300 W RMS, while short peak levels of up to 900 W Peak can be processed. These power specifications allow compatibility with a variety of medium to high-power amplifiers, giving you enough headroom for dynamic music passages. If you enjoy loud bass lines or powerful beats, you can rely on a confident power reserve. The combination of the D2 dual voice coil and Santoprene rubber surround contributes to clean cone movement, which benefits clarity in the low-frequency range. Even at elevated volumes, the robust three-layer composite sandwich membrane prevents noticeable distortion. Since the subwoofer performs optimally in both sealed and vented enclosures, level flexibility is maintained.

What advantages does a Santoprene rubber surround offer for this 8-inch subwoofer?

By using Santoprene rubber, an excellent connection between the diaphragm and the basket is achieved, while the material remains flexible and resistant to mechanical stress. The DD Audio SL608 thus maintains a uniform excursion, leading to a reduced distortion factor in the lower frequency range. This surround also withstands larger excursions without unwanted noise, which is particularly useful at high volumes. Additionally, the combination of the three-layer composite sandwich membrane and Santoprene surround improves the stability of the entire construction. This way, you can enjoy deep bass impulses with minimal distortion. In sealed or vented boxes, the powerful and precise bass character is optimally showcased.

How does the D2 dual voice coil of the DD Audio SL608 contribute to installation flexibility?

A D2 dual voice coil with 2 x 2 Ohm allows you to connect the subwoofer to different impedances, depending on the amplifier power available to you. By wiring the voice coils in series or parallel, the total resistance can be specifically adjusted to the amplifier's output, ensuring optimal power transfer. Especially in limited space situations, this variation can maximize bass pressure without overloading the amplifier. Furthermore, the dual winding improves heat dissipation, ensuring stable performance even during longer sessions at high volume. This fundamental design gives you more flexibility in tuning various car audio configurations.

What dimensions should be considered when installing in the car to ensure a smooth installation?

To ensure a reliable fit during installation, the installation diameter of 187 mm plays a crucial role. The low installation depth of 89 mm is also helpful if you want to design the housing space-saving. With the DD Audio SL608, various installation positions can be utilized without the need for major adjustments to trims or floor panels. Especially in vehicles with limited trunk space or special storage compartments, you can benefit from this compact format. Additionally, you should consider the 51 mm voice coil diameter, as it affects thermal load capacity and requires sufficient space in the magnet area. The total weight of 5 kg also makes transport and installation easier.

How does the 84 dB sensitivity of the DD Audio SL608 affect efficiency?

The sensitivity of 84 dB SPL means that the subwoofer achieves a solid volume level with relatively moderate amplifier power. This allows you to generate a decent sound pressure from a given amplifier output without pushing the component to its performance limits. Together with the 51 mm voice coil and the sophisticated magnet structure, an efficient conversion of electrical energy into acoustic output is achieved. Particularly in tight or well-damped vehicle cabins, a full, powerful bass unfolds without the need for an oversized amplifier. At the same time, the sub can cover broader dynamic peaks when you call for more level temporarily, which is useful in everyday situations or during showcases.

What role does the three-layer composite sandwich membrane play in the sound quality of this subwoofer?

Thanks to the three-layer composite sandwich construction, increased stiffness of the membrane is achieved while saving weight, which promotes precise and controlled bass reproduction. The hard outer structure can suppress a large part of unwanted resonances, while the inner layer dampens vibrations. In the case of the DD Audio SL608, this results in clean impulse processing, especially in the frequency range around 34 Hz, where many subwoofers tend to distort. At the same time, the material allows for a quick rise and fall response, which is advantageous for electronic music and powerful kick drums. This enables you to achieve a differentiated low-frequency representation that does not swallow details in the bassline and provides you with noticeable pressure across the entire lower frequency spectrum.

Why is the frequency response of 34 Hz in the DD Audio SL608 so crucial for deep bass?

A nominal frequency response starting at around 34 Hz allows you to perceptibly enhance even sub-frequencies in the lower range. Especially when you focus on strong lows in movies or electronic music, a subwoofer with the lowest possible cutoff frequency is advantageous. Thanks to the combination of a piston area of 165 mm² and an Xmax of 12 mm, the subwoofer can displace considerable amounts of air, giving you a solid foundation in the bass range. Additionally, with proper venting of the sound guide, an even stronger kick can be realized without drastically increasing the enclosure volume. The deep onset of the acoustic effective range thus enhances the enjoyment factor across various music genres.

Do I need special accessories for installation or are there relevant installation notes?

For installation, only suitable screws and a stable cutout with a diameter of 187 mm are required to properly hold the subwoofer in place. Since the magnet diameter is 134 mm, it is advisable to keep the enclosure clear at this point to avoid any contact and ensure the construction sits properly. The relatively low total weight of 5 kg for the DD Audio SL608 is advantageous because you do not need additional brackets or reinforced support structures. However, ensure a clean sealing of the mounting surface to prevent unwanted airflows. Additionally, there should be sufficient cable management to optimally drive the D2 dual voice coil without pinching any cables.

Manufacturer information/responsible person

Audio Import Group
Pekka Kinnunen
Palkkitie 10
84100 Ylivieska
Finland

Contact: info@audioimport.fi

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