Be4008 Truextent SSX Beryllium Diaphragm 8 ohm

BE4008 Materion Electrofusion Truextent Beryllium Dia 8 ohm.
This Truextent BE4008 diaphragm replaces the JBL 2440H, 2441H, 2445H, 2446H, 2447H, 2450H, 2451H, 375H, 5A360H, 5P350H. 5P360H, MI11427H, Radian 950PB/8 and more.

Spec Sheet .PDF
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Materion Electrofusion Truextent^® SSX™ Ø4" diaphragms with beryllium domes now available for Immediate Shipment worldwide

We are pleased to introduce our new Truextent^® SSX™ line of compression driver diaphragm assemblies. Designed with polymer surrounds, aluminum wire edge wound voice coils, and hot-formed Truextent Materion Electrofusion brand pure Acoustic Beryllium domes, these compression driver diaphragm assemblies provide the exceptional power handling capability, high efficiency, and clarity of sound you need. The SSX suspension is constructed from a proprietary polymer, rather than a metal one-piece dome and surround, which enhances the reliability and eliminates fatigue stresses that destroy traditional driver diaphragms. Also, Acoustic Beryllium has the highest stiffness to density ratio of all commercial dome materials, which reduces the mass of the moving parts of the diaphragm. The low mass greatly improves responsiveness while the high stiffness maintains rigidity over a wide frequency range.  This eliminates the "breakup" associated with the mechanical deformation of traditional dome materials at their resonate frequencies. All SSX diaphragms deliver superior performance, longevity and value.

Compatibility Guide

The SSX precision diaphragm has been engineered to fit a variety of JBL and Radian compression drivers. Click here for a copy of the SSX diaphragm installation instructions.

Make	Driver Model	SSX Replacement	Original Factory Diaphragm
JBL	2440	Be4016	D16R2440
JBL	2441	Be4016	D16R2441
JBL	2445H	Be4008	D8R2445
JBL	2445J	Be4016	D16R2445
JBL	2446H	Be4008	D8R2450
JBL	2446J	Be4016	D16R2450
JBL	2447H	Be4008	D8R2450
JBL	2447J	Be4016	D16R2450
JBL	2450H	Be4008	D8R2450
JBL	2450J	Be4016	D16R2450
JBL	2451H	Be4008	D8R2450
JBL	2451H-1	Be4008	D8R2450
JBL	2451J	Be4016	D16R2450
JBL	375H	Be4016	D16R2440
JBL	376H	Be4016	No Longer Available
JBL	5A360	Be4016	D16R2440
JBL	5P350	Be4016	D16R2440
JBL	5P360	Be4016	D16R2440
JBL	MI11427	Be4016	D16R2440
RADIAN	950-PB/8	Be4008	1245-8
RADIAN	950-PB/16	Be4016	1245-16

Why Beryllium?

There is no doubt that of all the commercially-available materials today, beryllium domes yield the finest sounding compression drivers with all of the mechanical power handling capability of titanium or aluminum. Beryllium has the highest stiffness to density ratio of all commercial driver dome materials. This allows the diaphragm to have a low overall mass, which greatly improves the responsiveness and still remain rigid over a wide frequency range, eliminating the breakup associated with the mechanical deformation of traditional domes at their resonate frequencies. Another critical advantage of beryllium in diaphragm applications is that it performs up until failure mode with a minimum of sound quality degradation.

Why Truextent?

Our beryllium diaphragm assemblies blend the finest materials and design methodology to yield true clarity of sound.

• Aluminum Wire Voice Coils. In addition to the beryllium dome, the design further reduces overall mass by using edge wound voice coils of pure aluminum wire. These voice coils have less mass than copper-clad wire (which yields better top-end frequency response) and have superior heat transfer capability over copper-clad wire (which improves the power-handling capability). Our proprietary aluminum soldering process ensures superior reliability.
• Polymer Surround. To further extend the frequency response and improve the lifespan of the diaphragm, these assemblies incorporate a polymer surround. Our proprietary adhesive joining process results in improved uniformity of diaphragm-to-diaphragm performance and a uniform application of adhesive, resulting in minimal mechanical distortion of the dome (and sound waves).
• The Right Design. Our design uses a beryllium dome formed from extremely thin sheet material for superior performance and does not shatter during failure mode.
• The Right Fit. Our standard off-the-shelf diaphragm assemblies have been designed to drop right into the majority of existing compression driver motor geometries. We have the engineering and manufacturing capability to supply full-custom versions for OEMs.

Why Clarity of Sound?

The sound reinforcement market DEMANDS compression drivers that can dissipate a lot of power and produce high Sound Pressure Levels (SPLs). The Truextent brand of compression driver diaphragm assemblies can deliver that, and much, much more. Unlike titanium diaphragm assemblies, whose breakup mode occurs around 4kHz where the ear is most sensitive, our beryllium diaphragm assemblies have been designed with a breakup mode shifted to above 15kHz, which is higher than all the fundamental frequencies by an octave. The associated breakup harmonics fall well above the range of human hearing.

The beryllium used in the Truextent design is thinner compared to other titanium or aluminum drivers which further increases detail. By faithfully reproducing the input signal, the NEED for high SPLs actually goes down, since the system no longer needs to compensate for missing frequency bands by overdriving. Vocals and instrumental sounds can be clearly heard by the audience at an overall lower SPL with the same perceived volume, resulting in a more pleasing audience experience.