Per Madisound:
SB Ceramic cones consist of an aluminum/ceramic dual layer cone. Ceramic provides a very hard and robust surface with improved sonic properties and cosmetic appearance.
Before I dive in I want to note that this is a dual voice coil (DVC) woofer with dual 3.2 Ohm coil configurable in parallel or in series. I have tested and provided the T/S parameters with the coils wired in series and also in parallel. However, based on a poll I created on my Facebook page where I asked if people prefer to run a DVC woofer at a higher or lower load where over 80% of the replies indicated “higher load”, I only tested the woofer at the higher series load of 6.4-ohm nominal for frequency response. However, the linear excursion limits are practically the same between the two sets (the Bl, Cms, and Le curves do not change) and, thus, I only provide the results of the series testing.
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Before I dive in I want to note that this is a dual voice coil (DVC) woofer with dual 2 Ohm coil configurable in parallel or in series. I have tested and provided the T/S parameters with the coils wired in series and also in parallel. However, based on a poll I created on my Facebook page where I asked if people prefer to run a DVC woofer at a higher or lower load where over 80% of the replies indicated “higher load”, I only tested the woofer at the higher series load of 4-ohm nominal for frequency response. However, the linear excursion limits are practically the same between the two sets (the Bl, Cms, and Le curves do not change) and, thus, I only provide the results of the series testing.
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Note: These speakers are designed specifically for car audio use and come with a kit of mounting gear such as adapter rings, grilles and additional installation hardware. This review is focused only on the performance aspect and does not consider the “install” aspect as it relates to the provided hardware.
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Intro
It’s worth noting this review is based on mostly objective data. These drivers – as well as the others from the AudioFrog GB series speakers – include a LOT of installation hardware to make installs quicker and easier. I simply don’t have the time right now to really delve in to the facets of this, but I will include some of the hardware in the following pictures.
Up for test is AudioFrog’s GB25 2.5 inch Midrange. Pictures don’t do justice to the smallness of these drivers but here they are anyway…
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Up for test is AudioFrog’s GB40 4″ Midrange. These drivers – as well as the others from the AudioFrog GB series speakers – include a LOT of installation hardware to make installs quicker and easier. I simply don’t have the time right now to really delve in to the facets of this here.
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