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Accuton

S220-6-221

8" (20cm) midrange driver

589,00€
589,00€ 589,00€
incl. VAT , possibly plus shipping

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Highlights

  • 21 cm woofer, sandwich cone, rear-ventilated voice coil.
  • Resonance frequency 22.1Hz, impedance 6 ohms, SPL 88dB.
  • Recommended enclosure: closed 39L, bass reflex 66L.
Seen more cheaply Personal Offer
brand: Accuton
Delivery time:
Available for delivery in 1-4 days
Number:
Piece
Watt RMS:
150
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AccutonS220-6-222
Accuton-S220-6-222-8" (20cm) Tiefmitteltöner-masori-kaufen
Accuton-C30-6-358-Kalotten-Hochtöner-masori-kaufen
AccutonC30-6-358
Accuton-S220-6-221-8" (20cm) Tiefmitteltöner-masori-kaufen
589,00€
589,00€ 589,00€

The S220-6-221 is an 8-inch woofer with an extremely stiff ceramic sandwich membrane. The FEA-optimized overhang voice coil design with a 38 mm aluminum voice coil former ensures low energy storage during the decay process and excellent heat transfer. It is exclusively designed for use in home hi-fi applications and must not be installed in vehicles under any circumstances. The low-loss rubber surround and the thin fabric spider center the moving parts with high linear excursion.

Short description:

  • 21 cm woofer with sandwich membrane. It has a ventilated voice coil.

Mechanical Data

  • Overall diameter / front panel 220 mm
  • Cutout 191 mm
  • Minimum front panel thickness 9 mm
  • Construction height 105 mm
  • Magnet height 42 mm
  • Magnet diameter 120 mm
  • Screw holes for screws according to DIN 7984 / Ø 4.50 mm
  • Weight 3.15 kg

Thiele-Small Parameter

  • Sensitivity SPL 88 dB
  • Resistance (DC) Re 5.9 Ohm
  • Outdoor resonance frequency Fs 22.1 Hz
  • Equivalence Volume Vessel 112.9 Ltr
  • Mechanical Quality Qms 5.73
  • Electrical quality Qes 0.39
  • Total quality Qts 0.37
  • Effective membrane area Sd 224 cm²
  • Moving mass Mms 32.8 g
  • Compliance of membrane tension Cms 1.58 mm/N
  • Mechanical resistance Rms 0.79 kg*s

"Oscillator Coil Parameters"

  • Load capacity P 150 W RMS
  • Impedance 6 Ohm
  • Linear displacement Xmax +/-5 mm
  • Diameter of the vibrating coil 38 mm
  • Swing coil carrier material Ti
  • Conductor material Cu
  • Inductance of the oscillating coil Le 0.81 mH
  • Power factor Bl 8.28 N/A
  • Drive variant Overhanging
  • Ferrofluid in the air gap No

Enclosure Recommendation Closed:

  • Vb: 39L, -4dB @ 40Hz, -13dB @ 20Hz, F-3dB: 42Hz, Q: 0.71 (Balanced)
  • Vb: 101L, -4dB @ 40Hz, -10dB @ 20Hz, F-3dB: 44Hz, Q: 0.50 (Bass boost)

Bass reflex enclosure recommendation:

  • Vb: 66L, Port diameter: 70mm, Length: 300mm, Fres: 22Hz, F-3dB: 27Hz, Q: 0.58 (optimal)
  • Vb: 101L, Port diameter: 70mm, Length: 150mm, Freq: 23.5Hz, F-3dB: 24Hz, Q: 0.50 (extended bass)
  • Vb: 56L, port diameter: 70mm, length: 300mm, fres: 24Hz, F-3dB: 29Hz, Q: 0.61 (0.7dB boost @ 50Hz)

Frequency response:

S220-6-221

Note: Not suitable for use in vehicles.

  • This speaker chassis has been specifically designed for use in home and studio applications. For automotive use, we recommend the special Automotive series from Accuton, which is offered by Masori upon request.
  • The automotive version (Accuton Carhifi version) of Accuton meets strict automotive standards and is specifically designed for use in passenger cars and various other vehicles. It is resistant to vibrations, weather influences, heat, and cold that can occur in an automotive environment. This ensures optimal audio quality and reliability.
  • Contact us at Masori for more information about the Carhifi automotive version of Accuton. We are happy to help you find the right solution for your needs in the automotive sector and to enable an optimal sound experience in your vehicle.



    Not suitable for use in vehicles.
  • This speaker chassis was specifically designed for use in home and studio applications. For automotive applications, we recommend using Accuton's special automotive series, which is available from Masori upon request.


  • The Accuton Carhifi version meets strict automotive standards and is specifically designed for use in cars and a wide variety of other vehicles. It is resistant to vibrations, weather conditions, heat, and cold that can occur in an automotive environment, ensuring optimal audio quality and reliability.


  • Contact us at Masori for more information about the Accuton Car HiFi Automotive version. We'll be happy to help you find the right solution for your automotive needs and provide an optimal sound experience in your vehicle.



The Accuton S220-6-221 speaker features an 8-inch ceramic-based sandwich membrane that allows for distortion-free reproduction due to its extreme stiffness. The FEA-optimized overhang voice coil design with a 38 mm aluminum voice coil former ensures minimal energy loss during the decay process and guarantees excellent heat transfer. The woofer is designed to allow for high linear excursion; the low-loss rubber surround further supports this. The built-in voice coil former material titanium and the conductor materials made of copper contribute to a powerful sound image. All these aspects give the speaker excellent technical characteristics.
The feature finite element analysis (FEA) optimization of the voice coil in the S220-6-221 results in excellent heat transfer and minimal energy loss. By utilizing an aluminum voice coil carrier with 38 mm, it is possible to reduce energy storage, significantly increasing the precision of the signal output. The high load capacity of 150 W RMS and the efficiency increase while simultaneously reducing heat generation are significant performance characteristics of this 8-inch subwoofer. The movement range of the voice coil is also perfectly held in position by the overlapping of the diaphragm plates, resulting in a stable sound image and high reproduction precision.
For the S220-6-221 speaker, two cabinet types are recommended: sealed and bass reflex. Sealed cabinet operating volumes include 39L for balanced sound and 101L for bass enhancement. In bass reflex cabinets, the operating volume is 66L with a Fres of 22Hz and a port diameter of 70mm. Variants with 101L and 56L operating volumes also allow for different bass enhancements. These specifications give you the freedom to shape the sound character exactly according to your room preferences. Choose ports with different lengths and diameters to optimize the frequency response. These cabinet types ensure that you can fully utilize the potential of the S220-6-221 speakers.
The S220-6-221 speaker is specifically optimized for use in home and studio applications. Due to the fine tuning of the frequency parameters and the robust ceramic sandwich membrane, it is perfectly suited for the listening experience in controlled environments. It is not suitable for use in vehicles, where other physical influences such as vibrations or temperature changes may occur. For automotive applications, there are special versions from the brand Accuton that can withstand the harsh conditions of an onboard system. Therefore, the S220-6-221 is an excellent choice if you are looking for precise and deep sound in a space tailored to the listener.
The S220-6-221 from Accuton has maximum technical specifications that manifest in several parameters. A sensitivity of 88 dB ensures a clear and distinct sound. With a power handling of 150 W RMS and an impedance of 6 Ohms, it delivers a powerful and stable sound image. The linear excursion is +/- 5 mm, and the mechanical resistance is 0.79 kg/s. The voice coil has a diameter of 38 mm and an inductance of 0.81 mH. The force factor (BL factor) is 8.28 N/A, resulting in an excellent drive variant.
The installation of the S220-6-221 speaker from Accuton requires precise attention to the mechanical dimensions. The overall diameter is 220 mm, with the cutout specified exactly at 191 mm and the minimum thickness of the front panel at 9 mm. The height of the woofer is 105 mm, and the magnet has a height of 42 mm with a diameter of 120 mm. The screw holes have a standard diameter according to DIN 7984 of 4.50 mm. When mounting in the enclosure, it is important to adhere to these dimensions exactly to ensure perfect fit and functionality. Rely on the specified measurements for optimal acoustic performance.
The Thiele-Small parameters of the Accuton S220-6-221 woofer reflect its acoustic performance capabilities. The free air resonance frequency Fs is 22.1 Hz, with an equivalent volume Vas of 112.9 L. The mechanical Qms value is 5.73 and the electrical Qes value is 0.39, resulting in a total quality factor Qts of 0.37. The effective diaphragm area Sd is 224 cm², with a moving mass Mms of 32.8 g. The compliance of the diaphragm suspension has a value of Cms of 1.58 mm/N, and the mechanical resistance is 0.79 kg/s. These parameters are crucial for accurate sound reproduction.
The S220-6-221 is distinguished by its 8-inch ceramic-based sandwich membrane, which is exceptionally stiff, and by the use of an overhanging voice coil design. With an extremely low mechanical resistance and optimized Thiele-Small parameters, it delivers particularly deep and precise bass compared to other Accuton drivers. Its weight of 3.15 kg and a height of 105 mm make it more specific for stationary applications. Additionally, it does not offer automotive adaptations, unlike other Accuton models designed for use in an automotive environment. These differences define its positioning.
For an optimal sound image of the S220-6-221 speaker, the choice of the right cabinet type is crucial. For a closed cabinet, the recommended volume is 39L for a balanced sound image or 101L for stronger bass reproduction. In a bass reflex design, the volume should be 66L with a 70mm port diameter and a length of 300mm. This allows for ideal bass reproduction. Also, adjust the frequency tuning to your room acoustics to fully exploit its potential. Ensure that the dimensions are adhered to exactly so that the speaker can deliver its best performance.
The Accuton S220-6-221 is not designed for use in vehicles and is therefore not directly compatible with various car brands. For such applications, the manufacturer offers specially optimized automotive models that can meet the high demands in passenger cars and other vehicles. These variants are resistant to vibrations and extreme environmental influences and additionally provide optimal audio quality in the automotive sector. If you still wish to use this speaker in an automotive environment, extensive modifications and installations would be required, which do not reflect the recommended area of use.

THIEL & PARTNER GmbH
Adrian Bankewitz Dirk Vaehsen
Rommerskirchener Str. 21 / Unit 25 Rolling Mill
D-50259 Pulheim
Germany

Contact: info@accuton.com

Product Specifications

Manufacturer

Accuton

Product type

8" (20cm) midrange driver

Features

  • Highlights

    • 21 cm woofer, sandwich cone, rear-ventilated voice coil.
    • Resonance frequency 22.1Hz, impedance 6 ohms, SPL 88dB.
    • Recommended enclosure: closed 39L, bass reflex 66L.

  • Uvp

    589

weight

3.15 kg

Watt RMS Load Capacity

150

configurators

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Your advantages with Masori

Accuton S220-6-221: Buy premium woofers at masori.de with lowest price guarantee

The Accuton S220-6-221 8-inch woofer impresses with its excellent engineering. Featuring an exceptionally rigid ceramic sandwich cone, it minimizes unwanted resonances and delivers precise, crystal-clear sound. The innovative FEA-optimized overhang voice coil design with a 38 mm aluminum carrier ensures minimal energy storage and effective heat dissipation, enhancing performance and durability. The low-loss rubber surround and thin fabric spider ensure high linear excursion. For the best price, masori.de, with its lowest price guarantee, is the best choice.

Thiele-Small Parameters: Accuton's secret ingredient for sound excellence

The Thiele-Small parameters of the Accuton S220-6-221 reveal its technical sophistication. With a free-air resonance frequency of 22.1 Hz, this woofer offers an impressive bass response, ideal for integration into high-quality home and studio speaker systems. Its mechanical Q factor (Qms) is 5.73, its electrical Q factor (Qes) is 0.39, and its total Q factor (Qts) is 0.37. These values ​​demonstrate that the woofer is excellently balanced, achieving an optimal mix of mechanical stability and electrical control. Higher or lower values ​​could result in unwanted distortion or a tone-deaf sound.

Robust, precise and powerful: Construction of the S220-6-221 in detail

The Accuton S220-6-221 impresses with its sophisticated design. With a total diameter of 220 mm and a height of 105 mm, it fits perfectly into many cabinets. The titanium voice coil former and copper conductor maximize conductivity and interference-free transmission. The woofer is further enhanced by the rear-ventilated voice coil, which supports the mechanical power of 150 W RMS and ensures very clear and distortion-free sound reproduction, even at volume levels that might lead to distortion in comparable devices.

Accuton performance in the low bass range: Cabinet recommendations for best performance

For optimal bass reproduction, Accuton offers comprehensive enclosure recommendations. In a 39-liter sealed enclosure, the S220-6-221 achieves a balanced sound down to 42 Hz with a Q value of 0.71. In a bass-reflex enclosure with a volume of 66 liters, a port diameter of 70 mm, and a length of 300 mm, optimal frequency response is achieved at 27 Hz. Alternatively, a 101-liter enclosure with slightly different tuning can deliver an extended bass foundation, ideal for demanding studio applications. Smaller volumes or mistuning could reduce the pressure in the bass range.

Precision mechanical design: voice coil and other mechanical details

The voice coil of the S220-6-221 features a 38 mm diameter and a maximum excursion (Xmax) of ±5 mm, enabling a high degree of dynamics and precision in the bass range. The DC resistance Re is optimized at 5.9 ohms, allowing for seamless integration into common hi-fi systems. The voice coil's inductance of 0.81 mH ensures that the woofer responds precisely to commands and reproduces the desired frequency without distortion. A higher value could lead to delays and phasing issues, which would compromise sonic integrity.

Sensitivity and force factor: Easy integration into existing systems

With a sensitivity of 88 dB, the S220-6-221 is capable of achieving good volume levels even without powerful amplifiers. The BL force factor of 8.28 N/A indicates a powerful drive, guaranteeing precise diaphragm movements. A high force factor is essential for the clean reproduction of low-frequency audio signals and ensures that even complex bass passages are reproduced dynamically and unadulterated. A lower value, on the other hand, would impair the speed and precision of the low-frequency range.

Mechanics, resonance and influence on sound quality: A critical review

The excellent mechanical quality, an Rms of 0.79 kg/s, and the mechanical resistance contribute to a balanced, low-resonance sound. The high compliance Cms of 1.58 mm/N ensures that the system is maximally deflected at low wall heights, while maintaining optimal diaphragm pressure. This combination of mechanical finesse and electrical performance ensures accurate low-frequency reproduction and low distortion. Systems with a lower Cms would struggle to reproduce low frequencies efficiently at low volumes.

Construction and design: Precise dimensions for uncompromising performance

The S220-6-221 impresses with its sophisticated mounting architecture. The well-designed 191 mm hole cutout and a minimum front panel thickness of 9 mm optimize cabinet adaptation. The magnet, with a diameter of 120 mm and a height of 42 mm, forms the heart of this woofer and generates an extremely strong, controlled magnetic field. These dimensions ensure the structural integrity and resonance-free installation of the speaker. Deviations or incorrect mounting dimensions could lead to sonic degradation due to unwanted vibrations.

Focus on constant challenges in the mobile environment

The Accuton woofer is optimized for stationary use. While it is intended for home systems, Accuton offers special automotive models for car applications that meet the harsh requirements of a vehicle. Regardless of the actual application, the Accuton S220-6-221 delivers clear, powerful sound for home theaters or studio applications. Adapting to automotive standards would compromise its optimal performance, as the frequency response and power handling would have to be modified for harsh driving conditions. Take advantage of on-site installation in Frankfurt (Oder) and learn about new developments and trends in the audio blog at masori.de. If you have any questions, our expert support FAQ & Help is always available to advise you.