Accuton S220-12-222 Woofer 12 Ohm 1 piece

The Accuton S220-12-222 is a high efficiency 8.5 inch sandwich cone bass driver for 2 or 3 way designs. It features a large diameter voice coil with 55mm titanium voice coil former and an underhung 120mm neodymium magnet system for very low distortion.

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Short Description:

22 cm woofer with sandwich cone. A magnet system with neodymium magnets drives the speaker. It has a rear-ventilated voice coil.

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Mechanical data:

Overall diameter / front panel 220 mm

Hole cutout 191 mm

minimum front panel thickness 9 mm

overall height 112.5 mm

Magnet height 49.5 mm

Magnet diameter 120 mm

Screw holes For screws According to Din 7984 / Ø 4.50 Mm

Weight (pair) 9.5 Kg

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Thiele-Small Parameter:

Sensitivity Spl 91.5 dB

Resistance(DC) Re 6.52 Ohm

Free air resonance frequency Fs 25 Hz

Equivalent volume Vas 89.68 Ltr

Mechanical quality Qms 3.83

Electrical Q factor Qes 0.27

Overall quality Qts 0.26

Effective diaphragm area Sd 224 cm2

Moving mass Mms 32.15 Gr

Membrane stress compliance Cms 1.26 mm/N

Mechanical resistance Rms 1.32 Kg*S

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Voice coil parameters:

Power handling P 150 Watt

Impedance 12 Ohm

Linear excursion Xmax +/-5.25 mm

Voice coil diameter 55 mm

Voice coil carrier material Ti

Conductor material Cu

Voice coil inductance Le 0.36 mH Force factor Bl 10.95 N/A

Drive type Underhung Ferrofluid In air gap No

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Enclosure Recommendation Closed:

Vb: 12L, -11dB @ 40Hz, F-3dB: 69Hz, Q: 0.71 (typical).

Vb: 25L, -8dB @ 40Hz, F-3dB: 70Hz, Q: 0.50 (extended bass)

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Enclosure Recommendation Bass Reflex:

Vb: 30L, Fres: 23Hz with passive radiator, -12dB @ 25Hz, Q: 0.47 (optimum A/V alignment).

Vb: 25L, port diameter: 70mm, length: 230mm, Fres: 40Hz, F-3dB: 43Hz, Q: 0.50

Vb: 40L, port diameter: 70mm, length: 155mm, Fres: 37Hz, F-3dB: 37Hz, Q: 0.43 (extended bass)