10 ND A520

• 99,5 dB SPL 1W / 1m average sensitivity (AIC on)
• 65 mm (2,5 in) Interleaved Sandwich Voice coil (ISV)
• 300 W continuous pink noise power handling
• Neodymium motor assembly
• AIC (Active Impedance Control) technology
• Extremely high sound quality
• Humidity resistant

Description
The 10NDA520 is a 10" mid-bass transducer created for compact reflex 2-way enclosures. It can be coupled with 1" compression drivers and it can also be used in mid-low sections on modern line-array systems.
Its features and design characteristics make it extremely defined in mid-range frequencies, offering a significant and consistent bottom-end. This also makes it suitable for monitoring applications.
The 10NDA520 incorporates our proprietary Active Impedance Control technology (AIC), consisting of an additional coil fixed on the pole piece and connected in parallel to the moving coil.
The magnetic field generated by AIC coil has the following effects:
1) Impedance linearization
2) Acoustic and electric phase linearization
3) Significant increase of sensitivity and total SPL
4) Total harmonic distortion reduction
5) Constant power transfer
By not absorbing the moving coil’s electromagnetic energy, the AIC offers substantial advantages to the sound quality.
The extremely powerful external neodymium magnet assembly assures high flux concentration, low power compression and excellent heat exchange. The overall result is the best power to weight ratio available on the market today.
The curvilinear cone, specified with a high damping wood pulp has been designed to achieve the best possible linearity within its frequency range. The in-house developed cone treatment is a humidity repellent and significantly dampens bell-mode resonances.
The 65mm edge-wound voice coil assembly is wound on a strong fiberglas former in order to improve force transmission and power handling.
A proprietary humidity-block cone treatment makes the transducer suitable for outdoor use in adverse weather conditions. In addition, a special coating applied to both the top and back plates makes the 10NDA520 far more resistant to the corrosive effects of salts and oxidization.
 

GENERAL SPECIFICATIONS
Nominal Diameter	260mm (10 in)
Rated Impedance	6 Ohm
Continuous Pink Noise (1)	300W
Continuous Power (2)	220W
Program Power (3)	450W
Peak Power (4)	900W
Sensitivity (5)	99,5dB
Frequency Range (6)	60 - 6500 Hz
Power Compression @-10dB (7)	(22 W) 0,7 dB
Power Compression @-3dB	(110 W) 2,5 dB
Power Compression @0dB	(220 W) 3,9 dB
Max Recomm. Frequency	2000 Hz
Recomm. Enclosure Volume	10 ÷ 40 lt. (0,90 ÷ 1,41 cuft)
Minimum Impedance	6,5 Ohm at 25°C
Max Peak To Peak Excursion	22 mm (0,87 in)
Voice Coil Diameter	65 mm (2,5 in)
Voice Coil Winding Material	aluminum
Polarity	positive voltage on red terminal gives forward cone motion

THIELE SMALL PARAMETERS  (8)
Fs	63 Hz
Re	5,1 Ohm
Sd	0,035 sq.mt. (54,25 sq.in.)
Qms	7,1
Qes	0,27
Qts	0,26
Vas	38 lt. (1,34 cu ft)
Mms	29 gr. (0,06 lb)
BL	14,6 Tm
Linear Mathematical Xmax (9)	±4 mm (±0,16 in)
Le (1kHz)	0,05 mH (AIC on) - 0,47mH (AIC off)
Ref. Efficiency 1W@1m (half space)	97,6 dB

MOUNTING INFORMATIONS
Overall diameter	260 mm (10,24 in)
N. of mounting holes and bolt	4 on diam. 275 mm (4 on 10,83 in) 8 on diam. 244,5 mm (4 on 9,63 in)
Mounting holes diameter	7,15 mm (0,28 in)
Front mount baffle cutout ø	232 mm (9,13 in)
Rear mount baffle cutout ø	232 mm (9,13 in)
Total depth	104 mm (4,09 in)
Flange and gasket thickness	14,5 mm (0,57 in)
Net weight	3 kg (6,67 lb)
Shipping weight	3,57 kg (7,88 lb)
CardBoard Packaging dimensions	275 x 275 x 164mm (10,83 x 10,83 x 6,46 in)

 FREQUENCY RESPONSE CURVE OF 10NDA520 (AIC ON) MADE ON 30 LIT. ENCLOSURE TUNED AT 55 HZ IN FREE FIELD (4PI) ENVIRONMENT. ENCLOSURE CLOSES THE REAR OFTHE DRIVER. THE THIN LINE REPRESENTS 45 DEG. OFF AXIS FREQUENCY RESPONSE.


FREE AIR IMPEDANCE MAGNITUDE CURVE - AIC ON