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Eighteen Sound 6NM410B 6" 180W Midrange Speaker - Set of 1 - 18 Sound
Key Features:
Description
The 6NMB420 is a 44mm voice coil 6.5 inch neodymium midbass transducer designed for mid low frequency reproduction in system designs where high intelligibility is required.When compared to our 6ND410 state-of-the-art midrange transducer, 6NMB420 offers a lower frequency resonance and a longer linear Xmax value. As a result the speaker shows an increased output around 250Hz, with a consequent slightly reduced output above 700Hz.
It is suitable as mid-bass in line array systems or multiple way systems with high-pass crossover above 200 Hz and low-pass up to 3kHz; enclosure might be closed or vented with volume size starting from 2 lit.The speaker offers a superb linearity: distortion values are furtherly minimized by new enhanced design criterias, developed by Eighteen Sound engineers, taking the 6NMB420 to very high level of performance.
The extremely powerful external neodymium magnet assembly assures high flux concentration, low power compression and excellent heat exchange. The levels of force factor and power handling are, as a consequence, at the upper professional level with best 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 largecontact space between the back plate and the dissipating structure.Particular efforts were dedicated to the surround shape and material design in order to minimize the resonances on mid range frequencies. The triple roll design offers a consistent damping to typical bell modes.
The 44 mm voice coil is made of light-weight aluminum wire and assures linearity and high power handling.The ability to perform in humid environments is a key feature of the 6NMB420: this is achieved through a proprietary humidity repellent cone treatment
General Specifications
| Nominal Diameter | 6 in |
| Rated Impedance | 8 Ohm |
| AES Power | 200 W |
| Program Power | 260 W |
| Peak Power | 500 W |
| Sensitivity | 100 dB |
| Frequency Range | 200 - 7000 Hz |
| Power Compression at -10dB | 0.9 dB |
| Power Compression at -3dB | 1.6 dB |
| Power Compression at Full Power | 2.9 dB |
| Max Recomm. Frequency | 3500 Hz |
| Recomm. Enclosure Volume | 0.07 - 0.21 cuft |
| Minimum Impedance | 6.2 Ohm at 25°C |
| Max Peak To Peak Excursion | 0.55 in |
| Voice Coil Diameter | 1.75 in |
| Voice Coil winding material | aluminum |
| Suspension | Triple Roll, Polycotton |
| Cone | Curvilinear, Paper |
Thiele Small Parameters
| Fs | 110 Hz |
| Re | 5.3 Ohm |
| Sd | 20.15 sq.in. |
| Qms | 2.7 |
| Qes | 0.38 |
| Qts | 0.33 |
| Vas | 0.22 cuft |
| Mms | 18.76 lb |
| BL | 9 Tm |
| Linear Mathematical Xmax | ±0.12 in |
| Le (1kHz) | 0.1 m |
| HRef. Efficiency 1W at 1m (half space) | 95,1 dB |
Mounting information
| Overall diameter | 6.38 in |
| N. of mounting holes and bolt | 4 |
| Mounting holes diameter | 0.22 in |
| Bolt circle diameter | 6.69 in |
| Front mount baffle cutout ø | 5.38 in |
| Rear mount baffle cutout ø | 5.38 in |
| Total depth | 2.87 in |
| Flange and gasket thickness | 0.45 in |
| Net weight | 2.75 lb |
| Shipping weight | 3.19 lb |
| Packaging Dimensions | 7.2x6.6x3.3 in |
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