12ND75-08 12″ Woofer – Technical Specifications​

​High-Power Low-Frequency Driver for Professional Audio Systems​

---

​1. Key Features​

• ​500W Continuous Program Power​ – Reliable for high-output applications
• ​75mm (3″) Aluminum Voice Coil​ – Optimized thermal dissipation
• ​40Hz–3.5kHz Frequency Response​ – Wide range for versatile use
• ​100dB Sensitivity (1W/1m)​​ – Efficient sound reproduction
• ​Neodymium Magnet System​ – High flux density (1.3T) for powerful bass

---

​2. Typical Characteristics​

​Parameter​	​8Ω Model​	​16Ω Model​
Nominal Diameter	320 mm	320 mm
Nominal Impedance	8 Ω	16 Ω
Minimum Impedance	6 Ω	12 Ω
AES Power Handling	500 W	500 W
Sensitivity (1W/1m)	100 dB SPL	100 dB SPL
Frequency Range	40–3500 Hz	40–3500 Hz
Voice Coil Diameter	75 mm	75 mm
Voice Coil Material	Aluminum	Aluminum
Voice Coil Former	Glass fibre	Glass fibre
Magnet Material	Neodymium	Neodymium
Flux Density	1.3 T	1.3 T

---

​3. Design & Parameters​

​Parameter​	​Value​
Surround Shape	Triple roll
Cone Shape	Exponential
Magnet Type	Ring
Spider	Single
Pole Design	T-pole
Recommended Enclosure Volume	38 L
Recommended Tuning Frequency	55 Hz
Resonant Frequency (Fs)	50 Hz
DC Resistance (Re)	6.2 Ω
Electrical Q (Qes)	0.2
Mechanical Q (Qms)	7.8
Total Q (Qts)	0.2
Equivalent Volume (Vas)	101 L
Piston Area (Sd)	522 cm²
Maximum Linear Excursion (Xmax)	±3.5 mm
Maximum Mechanical Excursion (Xvar)	±6 mm
Moving Mass (Mms)	319 g
BL Factor (BL)	21 T·m
Voice Coil Inductance (Le @1kHz)	1.25 mH
Efficiency Bandwidth Product (EBP)	235

---

​4. Mounting & Shipping Information​

​Parameter​	​Value​
Overall Diameter	315 mm
Bolt Circle Diameter	298 mm
Baffle Cutout Diameter	283 mm
Depth	147 mm
Flange & Gasket Thickness	14 mm
Air Volume Occupied by Driver	2.5 L
Net Weight	4.9 kg
Shipping Weight	5.6 kg
Shipping Box Dimensions	340×340×170 mm

---

​