HiFi-Woofer With Twi by Number One


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Item Information

HiFi subwoofer, 2 x 250WMAX, 2 x 8Ω High-end speaker with diecast basket, dual voice coil and carbon fibre cone, powerful bass reproduction from bass-reflex cabinets or an especially dry, pulsed sound from very small closed cabinets. Suitable for HiFi, home cinema and top car HiFi.Thiele Small parameters and sound pressure curves for voice coils in parallel or series connection.
Packed Quantity
1 per pack
Manufacturer Number

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Delivery Information

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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)18Hz
Max. frequency range f3-2,500Hz
Rec. crossover freq. (fmax.)1,500Hz
Music power 2 x 250WMAX
Power rating (P) 2 x 150WRMS
SPL (1W/1m)92dB
Suspension compl. (Cms)0.75mm/N
Moving mass (Mms)100g
Mech. resistance (Rms)1.5kg/s
Mech. Q factor (Qms)6.50
Electr. Q factor (Qes)0.20
Total Q factor (Qts)0.19
Equivalent volume (Vas)225 l
DC resistance (Re)2 x 6Ω/3Ω
Voice coil induct. (Le)2 x 1.1mH/1.1mH
Voice coil diameter62mm
Voice coil formerKapton
Voice coil winding height18.8mm
Air gap height8mm
Linear excursion (XMAX)±5.4mm
Eff. cone area (Sd)495cm2
Volume displacement (Vd)267.3cm3
Force factor (BxL)12.1Tm
Reference efficiency (No)1.3%
Magnet diameter180mm
Magnet weight 65oz.
Mounting cutout Ø 272mm
Mounting depth 130mm
DimensionsØ 308mm
Weight 6.0kg
Rec. net cabinet volume 
  Closed- (with series resistor only)
  Bass-reflex> 50 l