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  3. Masori's Subwoofer Recommendations
  5. HI-DEF SL612
DD Audio HI-DEF SL612 12" (30cm) Flat Subwoofer
SKU:  DD-SL612-D2
EAN:  850013938445
600 Watt

HI-DEF SL612

SKU:  DD-SL612-D2
EAN:  850013938445

Technical Highlights

  • Power: 300-600W RMS, 1200W max., Impedance: D2/D4.
  • High temperature 2.5" voice coil, 72oz magnet, EROM surround.
  • Three-layer flat membrane body, 10.5cm installation depth.
  • More technical details
€279,00
€279,00 €279,00
5% discount with credit card
inkl. VAT , possibly plus shipping
Impedance: D2 (2x2 Ohm)
Only a few left in stock (1 pieces available)
Delivery
May 28, - Jun 2,
x piece
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HI-DEF SL612 by DD Audio

The DD Audio HI-DEF SL612 is a 12-inch (30 cm) flat subwoofer with a very low installation depth. It features a high-temperature 2.5-inch voice coil, a 72oz magnet, and venting of the voice coil gap at the back plate. The construction includes an EROM surround, a dual-layer spider system, and a three-layer flat diaphragm cone. A DD aluminum die-cast frame is integrated. The power ratings are 300–600 W RMS and 1200 W peak power. The impedance is specified as D2 or D4. Technical specifications include Xmax 14.5 mm, Xmech 40 mm, Fs 27 Hz, Qts 0.409, and Vas 68.349 liters. Recommended enclosure: sealed 22.5–42 liters, bass reflex 28–50 liters.

Features
  • 12-inch (30 cm) flat subwoofer
  • Manufacturer: DD Audio
  • Very low installation depth: 10.5 cm
  • High-temperature 2.5-inch voice coil
  • Dual-layer spider system
  • Three-layer flat diaphragm body
  • EROM surround
  • 72oz magnet
  • Venting of the voice coil gap at the back plate
  • DD aluminum die-cast frame
  • RMS power: 300–600 W
  • Peak power: 1200 W
  • Impedance: D2 / D4
Technical Data
  • Fs: 27 Hz
  • Qms: 7.906
  • Qes: 0.432
  • Qts: 0.409
  • Vas: 68.349 liters
  • Xmech: 40 mm
  • Xmax: 14.5 mm
  • Voice coil: 63.5 mm
  • Frame outer diameter: 31.9 cm
  • Frame outer diameter with gasket: 32.5 cm
  • Mounting diameter: 28.7 cm
  • Installation depth: 10.5 cm
  • Motor diameter: 16.51 cm
  • Motor depth: 3.81 cm
  • Displacement of the woofer: 0.06 liters
  • Shipping weight: 8 kg
  • Recommended enclosure sealed: 22.5–42 liters
  • Recommended enclosure bass reflex: 28–50 liters

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Frequently Asked Questions about HI-DEF SL612

What performance specifications does the HI-DEF SL612 Subwoofer offer?

The DD Audio HI-DEF SL612 is a 12-inch flat Subwoofer with an RMS power range of 300 to 600 watts and a peak power of up to 1200 watts. The impedance of the Subwoofer is selectable between D2 and D4 to provide versatile connection options. The Subwoofers in this series are optimized for low frequencies, with the Thiele-Small parameter Fs set at 27 Hz, allowing the Subwoofer to reproduce deep bass tones accurately. Furthermore, the HI-DEF SL612 exhibits a high excursion (Xmax) of 14.5 mm and a remarkable Xmech of 40 mm, highlighting its ability to remain flexible under extreme bass demands.

How is the diaphragm of the HI-DEF SL612 Subwoofer constructed?

The DD Audio HI-DEF SL612 Subwoofer features an innovative three-layer flat diaphragm body. The cone consists of a foam layer compressed between two pulp layers, giving it exceptional stiffness and lightness. This design allows for a comparable travel distance to conventional Subwoofers, but with a reduced overall depth. The diaphragm can handle large excursions, resulting in powerful and deep bass frequencies without straining the construction. This is particularly optimal for smaller enclosures with sealed or bass reflex systems.

What is the installation depth of the HI-DEF SL612 and what enclosure sizes is it suitable for?

With an installation depth of only 10.5 cm, the HI-DEF SL612 is ideal for installations in limited mounting volumes. It is designed for sealed enclosure volumes of 22.5 to 42 liters and bass reflex enclosures of 28 to 50 liters. The compact size and flexible enclosure integration allow for installation in various vehicle types. The small dimensions and compatibility with sealed and bass reflex concepts make it an excellent choice for applications where space is crucial, without compromising on sound quality.

What special features does the magnet and cooling of the HI-DEF SL612 have?

The HI-DEF SL612 is equipped with a powerful 72-ounce magnet that provides a strong magnetic flux density to drive the diaphragm. To optimize cooling and enhance power continuity, it is also equipped with a special ventilation system. The rear coil ventilation and the EROM surround significantly improve heat distribution. Especially during intense use or high volume, the ventilation of the coil gap reduces the risk of overheating, contributing to longevity. These features not only support durability but also ensure consistent performance under demanding conditions.

What impedance options are available for the HI-DEF SL612?

The DD Audio HI-DEF SL612 offers flexible connection options by choosing between two impedance options: D2 (2 Ohm) and D4 (4 Ohm). This dual configuration allows the Subwoofer to be tailored to the specific requirements of the audio system and achieve the best possible performance regardless of the amplifier's channel count. Whether a series or parallel connection is preferred, the versatile impedance options make the SL612 compatible with a variety of amplifier types, promoting optimized sound tuning and system integration.

What recommendations are there for the installation position of the Subwoofer?

For the best bass sound, you should position the HI-DEF SL612 so that the flat diaphragm can move freely. Classic and bass reflex enclosures benefit when the Subwoofer works rearward or against a stable surface that acts as a sound reflector. Pay attention to the frame dimensions of 31.9 cm in outer diameter and 32.5 cm with gasket to ensure a precise installation. The suitable mounting diameter is 28.7 cm. These measurements support accurate mounting, which optimizes sound performance and increases the product's lifespan.

How does the EROM surround affect the performance of the HI-DEF SL612?

The EROM surround (Enlarged Roll Over M-Roll) of the Subwoofer provides a larger roll surface, improving deformation capability and allowing for extreme diaphragm excursions. This feature leads to improved bass reproduction through increased flexibility. An optimal constellation can also positively influence the resonance behavior in the lower frequency range through the EROM surround, resulting in excellent fidelity of bass tones. Especially in dynamic music genres or films with intense deep bass frequencies, the DD Audio HI-DEF SL612 with its surround shows spectacular performance characteristics.

Can the HI-DEF SL612 be used in small vehicles?

Yes, thanks to its low installation depth of only 10.5 cm and flexible design, the HI-DEF SL612 is excellent for use in small vehicles. It is ideal when space for larger Subwoofers is limited, without sacrificing performance. The speaker's frame is designed to fit into confined vehicle spaces, while the three-layer flat cone provides an adequate sound body. Its ability to work effectively in small sealed or bass reflex enclosures emphasizes that the SL612 meets the demands of modern vehicles without loss of sound power.

What role do the Thiele-Small parameters play in the HI-DEF SL612?

The Thiele-Small parameters of the HI-DEF SL612 are crucial for its acoustic performance. With an Fs of 27 Hz, they provide a solid foundation for deep bass reproduction. The Qms parameter (7.906) indicates the mechanical quality, while Qes (0.432) points to the electrical quality, contributing to an overall system value Qts of 0.409, signaling robustness and efficiency. The Vas of 68.349 liters expresses the volume of the acoustically sealed system, which is equivalent to the suspension of the driver. These parameters assist in choosing the appropriate enclosure to achieve maximum sound fidelity.

How does the DD aluminum die-cast frame ensure the stability of the HI-DEF SL612?

The DD aluminum die-cast frame of the HI-DEF SL612 Subwoofer provides it with outstanding structural integrity and heat dissipation. Aluminum offers a solid base that ensures stability, especially at high volumes and intense vibrations. The rigidity of the frame minimizes unwanted resonances that could distort the sound. Additionally, the robust design contributes to durability, reduces the possibility of physical deformations, and is resistant to heat effects due to the natural thermal conductivity of the metal. These features contribute to consistent bass output and high sound clarity.

Manufacturer information / responsible person

Audio Import Group
Pekka Kinnunen
Palkkitie 10
84100 Ylivieska
Finland

Contact: info@audioimport.fi

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