HiFi-Woofer With Twi by Number One

SSP £79.99


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Item Information

HiFi subwoofer, 2 x 250WMAX, 2 x 8Ω Stabilised polypropylene cone, dual voice coil, perfect parameters for a deep bass reproduction in compact bass-reflex cabinets and band-pass cabinets, suitable for all HiFi, home cinema and car HiFi applications of high requirements.
Packed Quantity
1 per pack
Manufacturer Number

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Delivery Information

For UK orders we offer a Free Delivery, Standard or Next Working Day delivery service.

We have separate delivery charges for Europe, North America, Japan and the Rest of the World based on the size, weight and destination of your order.

Please view our About Delivery page for full details.

Returns & Refunds

If an item is faulty or damaged on delivery and we are notified within 24 hours we will arrange for a replacement or a refund of the item - it needs to be within this time period for us to make claims with our couriers.

If you have simply changed your mind or no longer require the item(s), you must notify us within 7 days from receiving your order. The item(s) must be in their original unused and unopened packaging and be in a resalable condition for a full refund. You will need to pay for the cost of returning the item(s) and the item(s) remain your responsibility until we receive them.

Please view our Returns & Refunds page for full details.

Full Details

Impedance (Z) 2 x 8Ω
Resonant frequency (fs)23Hz
Max. frequency range f3-2,000Hz
Rec. crossover freq. (fmax.)1,000Hz
Music power 2 x 250WMAX
Power rating (P) 2 x 120WRMS
SPL (1W/1m)91dB
Suspension compl. (Cms)0.85mm/N
Moving mass (Mms)68g
Mech. resistance (Rms)3.2kg/s
Mech. Q factor (Qms)3.03
Electr. Q factor (Qes)0.26
Total Q factor (Qts)0.24
Equivalent volume (Vas)290 l
DC resistance (Re)2 x 6.3Ω/3.2Ω
Voice coil induct. (Le)2 x 1.0mH/1.0mH
Voice coil diameter50mm
Voice coil formeraluminium
Voice coil winding height16mm
Air gap height8mm
Linear excursion (XMAX)±4mm
Eff. cone area (Sd)495cm2
Volume displacement (Vd)198cm3
Force factor (BxL)10.3Tm
Reference efficiency (No)1.3%
Magnet diameter156mm
Magnet weight 49.8oz.
Mounting cutout Ø 280mm
Mounting depth 140mm
DimensionsØ 306mm
Weight 4.0kg
Rec. net cabinet volume 
  Closed38 l
  Bass-reflex72 l