HIFONICS

POWER FROM THE GODS

ZST8D2

Dual Voice Coil Subwoofer 20 cm

Power Handling: 250 Watts RMS / 500 Watts Max.

Technical Specifications

Parameter	Symbol	Value
Impedance	Zn	2 x 2 Ohms
Voice Coil Diameter	Ø	50 mm
Voice Coil Winding Height		28 mm
Max. Linear Excursion	Xmax	+/- 10 mm
Max. Mechanical Excursion	Xmax (Peak)	+/- 15 mm
Cone Area	Sd	214 cm²
Moving Mass	Mms	110 g
DC Resistance	Re	2 x 1.8 Ohms
Resonance Frequency	Fs	37.4 Hz
Mechanical Q-Factor	Qms	7.04
Electrical Q-Factor	Qes	0.6
Total Q-Factor	Qts	0.56
Equivalent Air Volume	VAS	10.6 L
VC Inductance	Le	2.18 mH
Flux Density	B/L	6.6 N/A
Efficiency 1W/1m	SPL	83 dB

Mechanical Components

Steel Basket
Glass-Fibre Cone
Rubber Surround
Glass-Fibre Dustcap
Single Nomex Spider
Y30 Magnet 40 oz (1.134 g)
Magnet Size: Ø134 x 20 mm
TIL (Glass-Fibre) Voice Coil Former

Recommended Enclosure

Ported Box

Vented Volume:	20 L
Port Diameter:	70 mm
Port Area:	38 cm²
Port Length:	31 cm
Tuning Freq. (Fb):	39 Hz
-3 dB Rolloff (F3):	32 Hz

Sealed Box

Sealed Volume:	9 - 15 L
-3 dB Rolloff (F3):	46 Hz

Dimensions & Weight

External Diameter:	214 mm
Mounting Diameter:	182 mm
Mounting Depth:	78 mm
Shipping Weight:	0.0 kg

Product Images

The HiFonics ZST8D2 subwoofer is depicted in several views. One image shows the front of the speaker with a black cone, blue surround, and silver basket, featuring the "HIFONICS ZEUS" logo. Another front view highlights the "HIFONICS ZEUS 500 WATTS" branding. A third image displays the rear and side of the subwoofer, illustrating the dual voice coil, magnet assembly, and mounting points.

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