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SB Acoustics 5" mid/woofer, 30mm VC NAC Alu Cone BLACK, SB15NBAC30-4

Model SB15NBAC30-4

Condition New

SB Acoustics 5" mid/woofer, 30mm VC NAC Alu Cone BLACK, SB15NBAC30-4

Special Features

Vented cast aluminum chassis for optimum strength and low compression
Geometrically reinforced aluminum cone for optimum piston operation
and reduced break-up
Soft low damping rubber surround for improved transient response
Non-conducting fibre glass voice coil former for minimum damping
Extended copper sleeve on pole piece for low inductance and low distortion
CCAW voice coil for reduced moving mass
Long life silver lead wires
Vented pole piece for reduced compression

Specifications:

Nominal Impedance	4 Ω	Free air resonance, Fs	35 Hz
DC resistance, Re	3.1 Ω	Sensitivity (2.83 V / 1 m)	88.5 dB
Voice coil inductance, Le	0.12 mH	Mechanical Q-factor, Qms	5.65
Effective piston area, Sd	82 cm²	Electrical Q-factor, Qes	0.32
Voice coil diameter	30.5 mm	Total Q-factor, Qts	0.30
Voice coil height	15 mm	Moving mass incl.air, Mms	10.8 g
Air gap height	5 mm	Force factor, Bl	4.8 Tm
Linear coil travel (p-p)	10 mm	Equivalent volume, Vas	18.3 liters
Magnetic flux density	1.0 T	Compliance, Cms	1.91 mm/N
Magnet weight	0.54 kg	Mechanical loss, Rms	0.42 kg/s
Net weight	1.46 kg	Rated power handling*	50 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.

Box recommendations:

Sealed box: 6-10 liter

Vented box: 8 liter tuned to 40 Hz

Conditions:

0.4 ohm additional series resistance

Qa = 30 (sealed box only) Qb = 7 (vented box only)

Volumes given are effective acoustic volumes

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