8MB720

8.0 In

8Ω

Datasheet

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Alternative/Current Model:
8NMB750

Features

99,5 dB SPL 1W-1m average sensitivity
500 W program power handling
51 mm (2 in) Interleaved sandwich voice coil
Weather protected cone and coated plates
Suitable for high performance three-way systems

Limited distribution U.S. only. Contact Universal music (U.S. official distributor) for infos

18 Sound’s 8MB720 mid-bass transducer is a state-of-the-art 8-inch ceramic midbass driver that combines excellent linearity with high power handling capabilities (500 W program power), very low distortion and reduced power compression .

The 51mm (2 in) employs Interleaved Sandwich Voice coil (ISV) technology.

The cone is treated against aggressive weather conditions.

The 8MB720 is an ideal choice for high performances compact three-way systems.

Specifications

Design

Parameters

Mounting and Shipping Info

Nominal Impedance8 Ω
Minimum Impedance6.3 Ω
Nominal Power Handling¹250 W
Continuous Power Handling²500 W
Sensitivity³99.5 dB
Frequency Range150 - 3500 Hz
Voice Coil Diameter51 mm (2.0 in)

Surround ShapeTriple roll
Magnet MaterialFerrite
Recommended Enclosure10.0 dm³ (0.35 ft³)
Recommended Tuning120 Hz

Resonance Frequency108 Hz
Re5.2 Ω
Qes0.35
Qms4.6
Qts0.32
Vas9.0 dm³ (0.32 ft³)
Sd227.0 cm² (35.19 in²)
η₀3.1 %
Xmax2.25 mm
Xvar3.0 mm
Mms18.0 g
Bl13.4 Txm
Le0.11 mH
EBP308 Hz

Overall Diameter225 mm (8.86 in)
Bolt Circle Diameter210 mm (8.27 in)
Baffle Cutout Diameter186.0 mm (7.32 in)
Depth105 mm (4.13 in)
Flange and Gasket Thickness11 mm (0.43 in)
Net Weight4.6 kg (10.14 lb)
Shipping Weight4.2 kg (9.26 lb)
Shipping Box235x235x150 mm (9.25x9.25x5.91 in)

2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free air.
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.