Wavecor WF182BD09 Glass Fiber 17 cm bass midrange

The 7” transducers WF182BD09 and WF182BD11 (both 4 ohm) and WF182BD10 and WF182BD12 (both 8 ohm) were designed as high performance bass and midrange units for  monitors and high-end hi-fi speakers. They offer outstanding deep bass performance and dynamic and detailed midrange.

• Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
• Copper cap on center pole to reduce voice coil inductance and to minimize variations in voice coil inductance as a function of voice coil position
• Cone made of a new paper/glass fiber mix with improved consistency and stability
• Rigid die cast alu chassis with extensive venting for lower air flow speed reducing audible distortion
• Vented voice coil former for reduced distortion and compression
• Vented center pole with dual flares for reduced noise level at large cone excursions
• Heavy-duty black fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
• Large motor with 1½” voice coil diameter 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 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

• Notes

  	Parameter	WF182BD09 and WF182BD11		WF182BD10 and WF182BD12		Unit
  		Before burn-in	After burn-in	Before burn-in	After burn-in
  	Nominal size	7		7		[inch.]
  	Nominal impedance	4		8		[ohm]
  	Recommended max. upper frequency limit	2.5		2.5		[kHz]
  1, 4	Sensitivity, 2.83V/1m (average SPL in range 200 - 1,000 Hz)	88.5		86		[dB]
  2, 4	Power handling, short term, IEC 268-5, no additional filtering					[W]
  2, 4	Power handling, long term, IEC 268-5, no additional filtering					[W]
  2	Power handling, continuous, IEC 268-5, no additional filtering	80		80		[W]
  	Effective radiating area, Sd	131		131		[sq.cm]
  3, 4, 6	Resonance frequency (free air, no baffle), Fs	33	28.5	34	29.5	[Hz]
  	Moving mass, incl. air (free air, no baffle), Mms	23.4		21.9		[g]
  3, 4	Force factor, Bxl	6.5		8.2		[N/A]
  3, 4, 6	Suspension compliance, Cms	1.0	1.33	1.0	1.33	[mm/N]
  3, 4, 6	Equivalent air volume, Vas	24.3	32.4	24.3	32.4	[lit.]
  3, 4, 6	Mechanical resistance, Rms	0.44	0.46	0.44	0.46	[Ns/m]
  3, 4, 6	Mechanical Q, Qms	10.9	9.1	10.5	8.8	[-]
  3, 4, 6	Electrical Q, Qes	0.37	0.32	0.44	0.38	[-]
  3, 4, 6	Total Q, Qts	0.35	0.31	0.42	0.37	[-]
  4	Voice coil resistance, RDC	3.2		6.4		[ohm]
  5	Voice coil inductance, Le (measured at 10 kHz)	0.10		0.17		[mH]
  	Voice coil inside diameter	39		39		[mm]
  	Voice coil winding height	16		16		[mm]
  	Air gap height	5		5		[mm]
  	Theoretical linear motor stroke, Xmax	±5.5		±5.5		[mm]
  	Magnet weight	725		725		[g]
  	Total unit net weight excl. packaging	1.95		1.95		[kg]
  3, 4, 5	Krm	131		117		[mohm]
  3, 4, 5	Erm	0.30		0.34		[-]
  3, 4, 5	Kxm	17.5		37		[mH]
  3, 4, 5	Exm	0.47		0.43		[-]