No big surprise here. With rear cover in place, on the stock item, the resonance dropped to Hz from Hz in free air. With the back cover removed, this is my subjective favorite option. The resonance frequency dropped to Hz.
If you use a more aggressive curve, Hz is feasible. A subjective result suggests that Hz is the current sweet spot. The 15" woofer does better there. This may be the result of reflection on the back cover, as the stock Radian has no damping material there, whilst I installed felt onto mine. After 60 hours of burn-in, there was no change whatsoever.
I then emailed Radian about the issue. They began by building coaxial loudspeakers and compression drivers. The Radian PB, with a 4. All Radian compression drivers feature heat-treated structural alloy aluminum diaphragm domes which form an optimum balance of strength and low weight. This is a key factor in extending high frequency response. They are ideal for use in high output, high power touring sound systems and stage monitors, while their low distortion, high fidelity, and linear response deliver clear, crisp music and speech for theatrical, auditorium, stadium, convention and church installations.
Throat Diameter. AES Power Rating. The large diaphragm features a 4" edge wound ribbon wire voice coil that has an extremely high power handling capacity. The 's wide frequency response range of Hz - 20 kHz makes it much more versatile than drivers with smaller diaphragms. The watt AES power handling capacity make it ideal for live sound applications that require clear, transparent high frequencies at extreme SPL levels.
This driver also has a very low magnetic stray field energy and a light weight of Replacement diaphragm for this speaker is model no.
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