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SB Acoustics

SB17CRC35 / Carbon

6.5" (16.5cm) midrange driver

109,00€
109,00€ 109,00€
incl. VAT , possibly plus shipping

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Highlights

  • Rated power 60 W, impedance 4 Ω or 8 Ω, frequency 70Hz-4kHz.
  • Resonance frequency 31.5 Hz (4 Ω) or 28 Hz (8 Ω), linear stroke 11 mm.
  • Sensitivity 90 dB (4 Ω) or 87 dB (8 Ω), Bl 5.0 Tm or 6.0 Tm.
Size: 4 Ohm
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brand: SB Acoustics
Delivery time:
Available for delivery in 1-4 days
Number:
Piece
Watt RMS:
60
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109,00€
109,00€ 109,00€

The SB Acoustics SB17CRC35 6.5" (16.5cm) midwoofer with a glossy carbon Rohacell® diaphragm is available in a 4 Ohm and 8 Ohm variant. The ultra-light and stiff diaphragm is driven by a powerful ferrite magnet. The resonance frequency around 30 Hz is well outside the usable range, allowing the driver to perform extremely linearly within the usable range and making it ideal for 2-way applications or as a pure midrange driver. The generously ventilated centering spider optimizes the rear compression behavior to a maximum and provides additional cooling.

features

  • Rohacell®/Carbon fiber sandwich membrane for optimized stiffness and damping ratio
  • Ventilated aluminum die-cast chassis for optimal strength and low compression
  • Rubber damper with low damping for improved settling behavior
  • Non-conductive glass fiber coil carrier for minimal damping
  • Extended copper sleeve on the pole shoe for low inductance and low distortion
  • CCAW coil for reduced moving mass
  • Durable silver wires
  • Ventilated pole shoe for reduced compression

Data 4 Ohm variant:

  • Nominal impedance 4 Ω
  • Frequency range 70Hz - 4kHz
  • Direct current resistance, Re 3.1 Ω
  • Inductance of the oscillating coil, Le 0.13 mH
  • Effective membrane area, Sd 118 cm2
  • Diameter of the vibrating coil 35.5 mm
  • Height of the vibrating coil 16 mm
  • Height of air gap 5 mm
  • Linear coil stroke (p-p) 11 mm
  • Magnetic flux density 1.0 T
  • Weight of the magnet 0.54 kg
  • Net weight 1.56 kg
  • Free air resonance, Fs 31.5 Hz
  • Sensitivity (2.83 V / 1 m) 90 dB
  • Mechanical Q-factor, Qms 4.32
  • Electrical Q-factor, Qes 0.35
  • Total Q factor, Qts 0.32
  • Moving mass including air, Mms 14.2 g
  • Power factor, Bl 5.0 Tm
  • Equivalence volume, VAS 35.5 liters
  • Compliance, Cms 1.80 mm/N
  • Mechanical loss, Rms 0.65 kg/s
  • Rated load capacity* 60 W
  • * IEC 268-5, T/S-Parameter measured on retracted drives.

Data 8 Ohm variant:

  • Nominal impedance 8 Ω
  • Frequency range 70Hz - 4kHz
  • Direct current resistance, Re 5.7 Ω
  • Inductance of the oscillating coil, Le 0.15 mH
  • Effective membrane area, Sd 118 cm2
  • Winding coil diameter 35.5 mm
  • Height of the vibrating coil 16 mm
  • Height of air gap 5 mm
  • Linear coil stroke (p-p) 11 mm
  • Magnetic flux density 1.0 T
  • Weight of the magnet 0.54 kg
  • Net weight 1.56 kg
  • Free air resonance, Fs 28 Hz
  • Sensitivity (2.83 V / 1 m) 87 dB
  • Mechanical Q-factor, Qms 3.90
  • Electrical Q-factor, Qes 0.37
  • Total Q factor, Qts 0.34
  • Moving mass including air, Mms 13.3 g
  • Power factor, Bl 6.0 Tm
  • Equivalence volume, VAS 48 liters
  • Compliance, Cms 2.43 mm/N
  • Mechanical loss, Rms 0.6 kg/s
  • Rated load capacity* 60 W
  • * IEC 268-5, T/S-Parameter measured on retracted drives.

Dimensions

SB17CRC35 / Carbon
The Carbon Rohacell® membrane of the SB17CRC35 offers an optimized ratio of stiffness and damping. This combination ensures excellent sound quality through reduced membrane distortion, which is particularly advantageous when used as a mid-bass driver. The ultra-lightweight construction allows for faster membrane movement, improving the transient response. Especially at high volumes, the sound remains clean, as the membrane operates stably and precisely. These characteristics make the driver ideal for use in 2-way systems or as a pure midrange driver. Additionally, the glossy surface enhances the aesthetic appearance, suitable for high-quality HiFi applications.
The extended copper sleeve on the pole shoe of the SB17CRC35 reduces the inductance of the voice coil, resulting in lower distortion and a clearer sound image. By improving the magnetic field linearity, it ensures stable conditions for the voice coil, especially at high volumes and complex musical passages. The efficiency of the driver is also increased by these construction elements, as mechanical losses are minimized. This improves the settling behavior and ensures an optimal frequency response. This design significantly contributes to the precise and distortion-free reproduction of even demanding musical pieces.
The SB17CRC35 is available in a 4 Ohm and an 8 Ohm variant, with differences in electrical properties and sensitivity. The 4 Ohm variant has a higher sensitivity of 90 dB compared to 87 dB for the 8 Ohm version. This means it sounds louder at the same voltage. The inductance of the voice coil is lower in the 4 Ohm version at 0.13 mH compared to 0.15 mH in the 8 Ohm, allowing for a slight advantage in transient response. The electrical damping also differs, affecting adaptability to different types of amplifiers. Both variants offer excellent sound quality, but the choice depends on the specific requirements of the system.
The assembly of the SB17CRC35 is technically demanding, as the dimensions must be considered precisely. The back should be adequately ventilated, as the ventilated aluminum die-cast chassis requires space for rear sound radiation. Therefore, the chassis opening must fit precisely to the 6.5" (16.5 cm) driver to ensure a secure fit without cabinet resonances. It should also be ensured that the installation depth does not interfere with the chassis. A symmetrical and damped installation increases sound fidelity and ensures a harmonious interaction in the frequency range of 70Hz to 4kHz. Additional rubber dampers can help minimize mechanical vibrations.
The Thiele Small parameters of the SB17CRC35 are essential for tuning in loudspeaker systems. The effective diaphragm area Sd is 118 cm², which affects bass dispersion. The mechanical Q factor Qms of 4.32/3.90 for 4/8 Ohm indicates the mechanical losses, while the electrical Q factor Qes at 0.35/0.37 describes the electrical damping. The total Q factor Qts shows with 0.32/0.34 how the driver influences bass reproduction in a closed or open enclosure. The free air resonance Fs is at 31.5/28 Hz and affects bass depth. These parameters help to optimally integrate the driver into a loudspeaker system, whether in a bass reflex or closed enclosure.
The ventilated pole shoe of the SB17CRC35 has a specific goal: to minimize compression effects and thus improve fidelity at high volumes. The ventilation promotes effective heat dissipation, allowing the driver to achieve a higher thermal load capacity. Heat generation can significantly affect sound quality, so the ventilation structure helps to regulate this. Additionally, the diaphragm travel is optimized, as the airflow behind the diaphragm remains unaltered. This design decision enhances performance efficiency and minimizes distortions that would otherwise be amplified at high power levels.
The CCAW voice coil carrier of the SB17CRC35, a combination of copper and aluminum, effectively reduces the moving mass of the diaphragm, allowing for faster settling and better impulse response. The lighter structure of the voice coil increases the sensitivity of the driver, especially in the critical midrange, improving the reproduction of details. Additionally, the CCAW carrier offers high thermal stability, ensuring reliability under continuous loads or high volumes. These characteristics contribute to the SB17CRC35's ability to play complex musical pieces accurately and without audible distortion.
With a rated power of 60 W according to IEC 268-5, the SB17CRC35 achieves high mechanical load capacity, which is important for long-lasting sound quality. This load capacity ensures that the driver maintains its tonality even at high sound pressures, minimizing the risk of distortion. The mechanical loss of 0.65/0.6 kg/s ensures that the loss energy is efficiently dissipated, thereby improving the overall performance of the speaker system. When used in a 2-way speaker arrangement, this load capacity helps to ensure a full and resonance-free sound image, even with highly varying musical pieces.
The SB17CRC35 is a 6.5 inch (16.5 cm) midrange driver and requires suitable installation dimensions in speaker enclosures. The effective diaphragm area is 118 cm², which allows for ideal integration into medium to large speaker enclosure systems. Especially during installation, attention must be paid to rear ventilation, as a well-ventilated chassis increases mechanical efficiency. The voice coil height of 16 mm and the linear coil excursion of 11 mm provide enough headroom for defined bass reproduction, while the magnetic flux density of 1.0 T ensures constant force transmission. The exact arrangement also plays a role in fully exploiting the driver's potential.
The SB17CRC35 is primarily designed for HiFi applications and is less tailored for specific car brands. However, the 6.5-inch driver with its 16.5 cm diameter can be used in various vehicle models that offer space for speakers of this size. It is particularly suitable for larger vehicles or models with specified 6.5-inch speaker cutouts. However, the installation requires appropriate mounting tools and enclosure modifications to fully exploit the potential of the technical specifications. A prior check in the vehicle manual can be crucial to avoid complications and ensure seamless integration.

Audio Components BV
Koen Pronk, Martijn Ouwerkerk
Peizerweg 97a
9727AJ Groningen
Netherlands

Contact: info@audio-components.com

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Product Specifications

Manufacturer

SB Acoustics

Product type

6.5" (16.5cm) midrange driver

Features

  • Highlights

    • Rated power 60 W, impedance 4 Ω or 8 Ω, frequency 70Hz-4kHz.
    • Resonance frequency 31.5 Hz (4 Ω) or 28 Hz (8 Ω), linear stroke 11 mm.
    • Sensitivity 90 dB (4 Ω) or 87 dB (8 Ω), Bl 5.0 Tm or 6.0 Tm.

  • Uvp

    99

weight

1.56 kg

Technical data

Watt RMS Load Capacity

60

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Your advantages with Masori

SB Acoustics SB17CRC35 woofer/midrange driver 4 Ω & 8 Ω versions – Buy now at masori.de

The SB Acoustics SB17CRC35 mid-woofer offers optimal performance with a Rohacell®/carbon fiber sandwich cone for maximum rigidity and damping. Choose between 4 ohm and 8 ohm versions to perfectly match your installation. With a frequency range of 70 Hz to 4 kHz, this midrange driver ensures clear and precise sound reproduction. The generously ventilated spider ensures excellent cooling and minimizes compression, ideal for demanding car hi-fi enthusiasts. Benefit from the Masori Lowest Price Guarantee and secure this high-quality midrange driver at the best price. Discover other highlights such as the CCAW voice coil and the vented pole piece, which together deliver unparalleled sound quality.

High-quality Rohacell®/carbon fiber sandwich membrane for optimal sound dynamics

The SB17CRC35 cone is constructed from an innovative Rohacell®/carbon fiber sandwich, providing a perfect balance between stiffness and damping. This construction enables extremely linear reproduction across the entire usable range, minimizing distortion. With an effective cone area of ​​118 cm² and a moving mass of 14.2 g (4 Ω) or 13.3 g (8 Ω), the midrange driver guarantees precise and detailed sound reproduction. The durable design ensures a long service life and stable performance, even under intensive use.

Robust ventilated cast aluminum chassis for maximum strength and low compression

The SB17CRC35's vented cast aluminum chassis provides exceptional rigidity and minimizes compression at high power levels. This construction ensures efficient heat dissipation and prevents overheating, ensuring the long-term reliability of the midrange driver. The robust chassis contributes to the stability of the cone and ensures consistent sound quality even under demanding conditions. Perfectly suited for installation in all vehicle types, supported by on-site installation in Frankfurt (Oder) .

Low DC resistance and low inductance for efficient power use

The SB17CRC35 woofer impresses with a low DC resistance (Re) of 3.1 Ω (4 Ω version) and 5.7 Ω (8 Ω version), enabling efficient power utilization and reducing amplifier load. The low voice coil inductance (Le) is 0.13 mH for the 4 ohm version and 0.15 mH for the 8 ohm version, supporting fast response times and precise sound reproduction. These technical characteristics are crucial for integration into high-performance car hi-fi systems, as they ensure optimal performance and low distortion.

Extended voice coil with CCAW principle for reduced moving mass

The SB17CRC35 features a CCAW voice coil, which ensures reduced moving mass and thus enables faster and more precise response to audio signals. The extended copper sleeve on the pole piece contributes to low inductance and minimizes distortion, promoting particularly clear and detailed sound reproduction. This advanced voice coil technology improves the efficiency of the midrange driver and ensures outstanding sound quality in your vehicle.

Excellent free air resonance and Q-factors for precise sound characteristics

With a free air resonance (Fs) of 31.5 Hz (4 Ω) and 28 Hz (8 Ω), the SB17CRC35 is well below the useful range, enabling extremely linear reproduction in the audible range. The mechanical Q-factors (Qms) of 4.32 (4 Ω) and 3.90 (8 Ω) and the electrical Q-factors (Qes) of 0.35 (4 Ω) and 0.37 (8 Ω) contribute to precise control of the oscillations. The overall Q-factor (Qts) of 0.32 (4 Ω) and 0.34 (8 Ω) optimizes the transitions between the frequency ranges and ensures seamless integration into two-way systems or as a dedicated midrange driver.

Highly sensitive rubber surround and non-conductive fiberglass voice coil former

The SB17CRC35's rubber surround is designed with low damping for improved transient response and natural sound reproduction. The non-conductive fiberglass voice coil former minimizes vibration damping and ensures the diaphragm responds precisely to audio signals. These technical features contribute to the high sensitivity of 90 dB (4 Ω) and 87 dB (8 Ω), ensuring clear and loud reproduction without compromising sound quality.

Optimal cooling thanks to generously ventilated centering spider

The SB17CRC35 features a generously ventilated spider that maximizes rear compression and allows for additional cooling. This design prevents overheating during extended playback times and ensures consistent performance under all conditions. The improved cooling contributes to the longevity of the midrange driver and ensures reliable operation even under intensive use. This is especially important for use in high-performance car hi-fi systems where stable temperature control is crucial.

Net weight and magnet weight for optimal handling and performance

With a net weight of 1.56 kg and a magnet weight of 0.54 kg, the SB17CRC35 offers a fine balance between stability and efficiency. The heavy magnet weight ensures a strong magnetic flux density of 1.0 T, which enhances the performance and precision of the midrange driver. The overall weight contributes to structural integrity and prevents unwanted vibrations that could impair sound quality. These characteristics make the SB17CRC35 ideal for long-term use in various vehicle types.

Powerful rated power of 60 W for intensive sound reproduction

The SB Acoustics SB17CRC35 woofer/midrange driver has a rated power handling of 60 W according to IEC 268-5, measured with the drivers retracted. This high power handling enables robust and intense sound reproduction, even at high volumes. The rated power handling is crucial for integration into high-performance car hi-fi systems, as it ensures stable and reliable performance without overheating or distortion. This makes the midrange driver ideal for demanding audio setups requiring high power consumption.

Technical support and installation service via masori.de

For optimal installation of the SB17CRC35, masori.de offers comprehensive on-site installation in Frankfurt (Oder) . Additionally, you can use our expert support FAQ & Help to clarify technical questions and get the most out of your car hi-fi system. Visit our Audio Blog for more information and tips on installation and optimization.

Effective magnetic flux density and force factor for precise sound control

The SB17CRC35 utilizes a magnetic flux density of 1.0 T and a force factor (Bl) of 5.0 Tm (4 Ω) and 6.0 Tm (8 Ω), respectively, enabling precise control of the diaphragm movements. These high values ​​ensure a strong and accurate response to audio signals, achieving detailed and dynamic sound reproduction. The force factor is critical to the efficiency of the midrange driver, optimizing the interaction between the magnetic field and the voice coil, resulting in improved performance and reduced distortion.