SW168WA01




	6.5” High Performance Steel Frame Subwoofer Unit. Suitable for dedicated subwoofer applications and as low frequency transducer in 2.5-, 3- and multi-way speaker systems.

Frequency resp. Specifications Harmonic distortion Dimensions Ordering info

		FEATURES

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 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


	FREQUENCY RESPONSE


	Measuring conditions, SPL Driver mounting: Flush in infinite baffle, back side open (no cabinet) Microphone distance: 1.0 m Input signal: 2.83 VRMS stepped sine wave Smoothing: 1/6 oct.


	Measuring conditions, impedance Driver mounting: Free air, no baffle, back side open (no cabinet) Input signal: Stepped sine wave, semi- current-drive, nominal current 2 mA Smoothing: None


	NOMINAL SPECIFICATIONS

Notes	Parameter	Before burn-in	After burn-in	Unit
	Nominal size	6.5		[inch.]
	Nominal impedance	4		[ohm]
	Recommended max. upper frequency limit	500		[Hz]
1, 3	Sensitivity, 2.83V/1m (calculated from T/S parameters)	88.5		[dB]
2	Power handling, short term, IEC 268-5, no additional filtering			[W]
2	Power handling, long term, IEC 268-5, no additional filtering			[W]
2	Power handling, continuous, IEC 268-5, no additional filtering	100		[W]
	Effective radiating area, Sd	127		[sq.cm]
3, 6	Resonance frequency (free air, no baffle), Fs	43		[Hz]
	Moving mass, incl. air (free air, no baffle), Mms	32.5		[g]
3	Force factor, Bxl	7.5		[N/A]
3, 6	Suspension compliance, Cms	0.42		[mm/N]
3, 6	Equivalent air volume, Vas	9.6		[lit.]
3, 6	Mechanical resistance, Rms	0.86		[Ns/m]
3, 6	Mechanical Q, Qms	10.2		[-]
3, 6	Electrical Q, Qes	0.47		[-]
3, 6	Total Q, Qts	0.45		[-]
4	Voice coil resistance, RDC	3.0		[ohm]
5	Voice coil inductance, Le (measured at 1 kHz)	1.3		[mH]
	Voice coil inside diameter	32		[mm]
	Voice coil winding height	18		[mm]
	Air gap height	4		[mm]
	Theoretical linear motor stroke, Xmax	`+/-7		[mm]
	Magnet weight			[g]
	Total unit net weight excl. packaging	1.35		[kg]
3, 5	Krm	7.8		[mohm]
3, 5	Erm	0.69		[-]
3, 5	Kxm	9.2		[mH]
3, 5	Exm	0.77		[-]

Note 1	Measured in infinite baffle.
Note 2	Tested in free air (no cabinet).
Note 3	Measured using a semi-constant current source, nominal level 2 mA.
Note 4	Measured at 20 deg. C
Note 5	It is generally a rough simplification to assume that loudspeaker transducer voice coils exhibit the characteristics of an inductor. Instead it is a far more accurate approach to use the more advanced model often referred to as the “Wright empirical model”, also used in LEAP-4 as the TSL model (www.linearx.com), involving parameters Krm, Erm, Kxm, and Exm. This more accurate transducer model is described in a technical paper (PDF) here.
Note 6	After burn-in specifications are measured 12 hours after exiting the transducer by a 20 Hz sine wave for 2 hours at level 10 VRMS. The unit is not burned in before shipping.


	HARMONIC DISTORTION



	Measuring conditions, harmonic distortion Driver mounting: In sealed, heavily stuffed enclosure, internal volume 12 lit. Microphone distance: 0.5 m Input signal: Stepped sine wave, 6.3 VRMS Smoothing: 1/12 oct.


	OUTLINE DRAWING AND NOMINAL DIMENSIONS


	TERMINAL NOMINAL DIMENSIONS (mm)


	PACKAGING AND ORDERING INFORMATION

Part no. SW168WA01-01	4 ohm version, individual packaging (one piece per box)
Part no. SW168WA01-02	4 ohm version, bulk packaging


	Latest update: Mar. 15, 2018

MORE INFO

PDF data sheet

Balanced Drive technical paper