Wavecor SW215WA01 20 cm bass paper 4 ohm

8½” High Performance Steel Frame Subwoofer Unit.
Suitable for dedicated subwoofer applications  and as low frequency transducer in 2½-, 3- and multi-way speaker systems.

• Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
• Large linear stroke, ensuring low distortion at high output levels
• Rigid air-dried paper cone to ensure piston motion even at high levels - for reduced distortion
• Rigid steel chassis with extensive venting for lower air flow speed reducing audible distortion
• Vented center pole with dual flares for reduced noise level at large cone excursions
• Heavy-duty fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
• Large motor structure for better control and power handling
• Built-in alu field-stabilizing ring for reduced distortion at high levels
• Low-loss suspension (high Qm) for better reproduction of details and dynamics
• Black plated motor parts for better heat transfer to the surrounding air
• Conex spider for better durability under extreme conditions
• Gold plated terminals to ensure long-term trouble free connection
• Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing

• Notes

  	Parameter	SW215WA01		SW215WA02		Unit
  		Before burn-in	After burn-in	Before burn-in	After burn-in
  	Nominal size	8½		8½		[inch.]
  	Nominal impedance	4		8		[ohm]
  	Recommended max. upper frequency limit	500		500		[Hz]
  1, 4	Sensitivity, 2.83V/1m (calculated from T/S parameters)	88.5		86		[dB]
  2, 4	Power handling, short term, IEC 268-5, no additional filtering	1,500		1,500		[W]
  2, 4	Power handling, long term, IEC 268-5, no additional filtering	400		400		[W]
  2	Power handling, continuous, IEC 268-5, no additional filtering	150		150		[W]
  	Effective radiating area, Sd	206		206		[sq.cm]
  3, 4, 6	Resonance frequency (free air, no baffle), Fs	33	30	35		[Hz]
  	Moving mass, incl. air (free air, no baffle), Mms	53		49		[g]
  3, 4	Force factor, Bxl	8.45		11.4		[N/A]
  3, 4, 6	Suspension compliance, Cms	0.43	0.54	0.43		[mm/N]
  3, 4, 6	Equivalent air volume, Vas	26	32.5	26		[lit.]
  3, 4, 6	Mechanical resistance, Rms	1.0	1.0	1.0		[Ns/m]
  3, 4, 6	Mechanical Q, Qms	11	10	10.7		[-]
  3, 4, 6	Electrical Q, Qes	0.51	0.46	0.52		[-]
  3, 4, 6	Total Q, Qts	0.49	0.44	0.49		[-]
  4	Voice coil resistance, RDC	3.3		6.3		[ohm]
  5	Voice coil inductance, Le (measured at 1 kHz)	1.2		1.7		[mH]
  	Voice coil inside diameter	39		39		[mm]
  	Voice coil winding height	25		25		[mm]
  	Air gap height	5		5		[mm]
  	Theoretical linear motor stroke, Xmax	±10		±10		[mm]
  	Magnet weight					[g]
  	Total unit net weight excl. packaging	2.4		2.4		[kg]
  3, 4, 5	Krm	7.0		1.04		[mohm]
  3, 4, 5	Erm	0.68		0.94		[-]
  3, 4, 5	Kxm	6.9		15.1		[mH]
  3, 4, 5	Exm	0.78		0.74		[-]

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