Clearance item. 1 piece available. New and A-grade. The Accuton S220-11-221 is a 22 cm woofer with a sandwich membrane. It features a vented voice coil and a ferrite magnet. It is exclusively designed for use in home hi-fi applications and must under no circumstances be installed in vehicles. It impresses, among other things, with an ultra-low free-air resonance frequency of 22.1Hz, making it the optimal woofer driver.

Mechanical Data

• Overall diameter / front panel 220 mm
• Cutout diameter 191 mm
• Minimum front panel thickness 9 mm
• Build height 105 mm
• Magnet height 42 mm
• Magnet diameter 120 mm
• Screw holes Screws Din 7984 / Ø 4.50 mm
• Weight (pair) 6.3 kg

Thiele-Small Parameters

• Sensitivity SPL 88 dB
• Resistance (DC) Re 5.9 Ohm
• Free-air resonance frequency Fs 22.1 Hz
• Equivalent volume Vas 112.9 liters
• Mechanical Q factor Qms 5.73
• Electrical Q factor Qes 0.39
• Total Q factor Qts 0.37
• Effective diaphragm area Sd 224 cm2
• Moving mass Mms 32.8 g
• Compliance Cms 1.58 mm/N
• Mechanical resistance Rms 0.79 kg*s

Voice Coil Parameters

• Power handling P 150 W
• Impedance 11 Ohm
• Linear excursion Xmax +/-5 mm
• Voice coil diameter 38 mm
• Voice coil former material Ti
• Conductor material Cu
• Voice coil inductance Le 0.81 mH
• Force factor Bl 8.28 N/A
• Drive type Dependent
• Ferrofluid in air gap No

Enclosure recommendation Sealed:

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

Enclosure recommendation Bass reflex:

• Vb: 66L, port diameter: 70mm, length: 300mm, Fres: 22Hz, F-3dB: 27Hz, Q: 0.58 (optimal)
• Vb: 101L, port diameter: 70mm, length: 150mm, Fres: 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 ripple @ 50Hz)

Frequency response:

Note: Not suitable for use in vehicles.

• This speaker chassis was specially developed for use in home and studio applications. For use in automotive environments, we recommend the special Automotive series from Accuton, which is offered by Masori upon request.
• The automotive version (Accuton Carhifi Version) from Accuton meets the strict automotive standards and is specially 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 to receive more information about the Carhifi Automotive version from Accuton. We are happy to help you find the right solution for your automotive needs and to enable an optimal sound experience in your vehicle.