The 6ND410 can be used as a midrange in both horn and direct radiation, closed or reflex enclosures, as small as 2 liters. The extremely powerful external neodymium magnet assembly assures high flux concentration, low power compression and excellent heat exchange. Consequently, the levels of force factor and power handling are at a top professional level with an optimum power to weight ratio. A consistent heat transfer is guaranteed by the encapsulation of the magnetic structure in the interior of the basket, offering a large contact space between the back plate and the dissipating structure. The curvilinear cone-surround, has been created using computer aided vibrational modelling software to move all undesired bell modes out of the usable frequency range. 
The 45 mm edge-wound voice coil assembly and terminals have been designed to minimise the moving mass while reinforcing force transmission.
The 3 threaded back plate holes give the final user the opportunity to insert an external customised heat sink, if further heat dissipation is required.
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 6ND410 far more resistant to the corrosive effects of salts and oxidization.

Features

• 102 dB SPL 1W / 1m average sensitivity
• 45 mm (1,77 in) edgewound aluminum voice coil
• 180 W AES power handling
• Neodymium motor assembly
• Extremely high sound quality
• Very shallow profile, 58 mm (2,3 in)
• Suitable for horn and direct radiation midrange applications

Specifications

GENERAL SPECIFICATIONS

• Nominal Diameter:152mm (6 in)
• Rated Impedance:8 Ohm
• AES Power:180 W
• Program Power:240 W
• Peak Power:480 W
• Sensitivity:102 dB
• Frequency Range:200 ÷ 8000 Hz
• Power Compression @-10dB:0,7 dB
• Power Compression @-3dB:1,2 dB
• Power Compression @Full Power:1,6 dB
• Max Recomm. Frequency:5000 Hz
• Recomm. Enclosure Volume:1 ÷ 5 lt. (0,04 ÷ 0,18 cuft)
• Minimum Impedance:8,2 Ohm at 25°C
• Max Peak To Peak Excursion:8 mm (0,31 in)
• Voice Coil Diameter:44 mm (1,75 in)
• Voice Coil Winding Material:aluminum
• Suspension:Progressive double roll, Polycotton
• Cone:Curvilinear, Paper

THIELE SMALL PARAMETERS

• Fs:120 Hz
• Re:5,9 Ohm
• Sd:0,0143 sq.mt. (20,6 sq.in.)
• Qms:2,2
• Qes:0,27
• Qts:0,24
• Vas:6,2 lt. (0,22 cuft)
• Mms:8,2 gr. (0,02 lb)
• BL:11,6 Tm
• Linear Mathematical Xmax:± 2 mm (±0,08 in)
• Le (1kHz):0,67 mH
• Ref. Efficiency 1W@1m (half space):97,9 dB

MOUNTING INFORMATIONS

• Overall diameter:162 mm (6,38 in)
• N. of mounting holes:4
• Mounting holes diameter:5,5 mm (0,22 in)
• Bolt circle diameter:170 mm (6,69 in)
• Front mount baffle cutout ø:148 mm (5,83 in)
• Rear mount baffle cutout ø:148 mm (5,83 in)
• Total depth:60 mm (2,3 in)
• Flange and gasket thickness:9,5 mm (0,37 in)
• Net weight:1,25 kg (2,76 lb)
• Shipping weight:1,8 kg (3,97 lb)
• CardBoard Packaging dimensions:170 x 170 x 80 mm (6,69 x 6,69 x 3,15 in)