Specification

15S420 Specification

Application		Compact 2- or 3-way
Nominal Impendance:	Ohm	8
Power handling AES noise:	W	900
Sensitivity (1 W / 1 m):	dB	98
Frequency response:	Hz	40 – 2500
Voice Coil Diameter:	mm	101.6 (4″)
Voice Coil Material:		Cu
Voice Coil Winding Depth:	mm	20
Magnet Gap Depth:	mm	10
Basket:		Cast Aluminum
Effect. diaphragm diameter D	mm	335

Recommended reflex enclosure:
50 L / 54 Hz, -3 dB = 63 Hz, BRD = 120 mm / 137 mm long
65 L / 49 Hz, -3 dB = 57 Hz, BRD = 130 mm / 153 mm long

Thiele-Small

15S420 Thiele-Small Parameters

Resonance Frequency:	Fs	Hz	39.8
DC Resistance:	Re	Ohm	5.90
Mechanical Q Factor:	Qms		4.96
Electrical Q Factor:	Qes		0.26
Total Quality Factor:	Qts		0.25
Equivalent Volume:	Vas	L	152
Moving Mass:	Mms	kg	0.114
Mechanical Complience:	Cms	mm / N	0.140
BL Factor:	BL	Tesla m	25.50
Effective Piston Area:	Sd	m²	0.0880
Max. linear Excursion:	Xmax	mm	+/- 5
Voice Coil Inductance:	Le1k	mH	1.54
	Le10k	mH	0.63

Mounting & Drawing

15S420 Drawing

15S420 Mounting Information

Overall Diameter:	mm	388
Mounting Holes Diameter:	mm	8 x (7 x 8)
Bolt Circle Diameter:	mm	371
Baffle cut-out Diameter:	mm	358
Overall depth:	mm	182
Net Weight:	kg	10.7

Curves

15S420 Curves

Frequency Response measured 100 W (28.3 V)
at 1 m in a closed enclosure of 100 litre in an anechoic chamber incl. 2nd and 3rd harmonic distortion raised 20 dB.