Very High Output Neodymium MF Transducer Key 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 Description The 6ND410 is a very high output, state-of-the-art midrange product for high quality professional use. The high level of sound quality has been achieved thanks to extensive research by Eighteen Sound engineers which focused on implementing mid frequencies intelligibility. 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. 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 information Overall diameter 162 mm (6,38 in) N. of mounting holes and bolt 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 (5,38 in) Rear mount baffle cutout ø 148 mm (5,38 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)