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Phase plugs may fit your drivers, but are made specifically for:
We are always trying these plugs in other drivers to see if they fit, and a stock plug may well fit into your driver despite not being in the above list. The phase plugs work primarily 2 fronts. 1st they fill the hole left when the dust cap removed. The air trapped in the cylinder inside the voice coil and above the pole piece causes what is called an "oil-can resonance". This invariably causes some midrange distress. Removal of the dustcap and filling the hole pretty much eliminates this source of coloration. The 2nd thing the phase plug does is to effectively halve the diameter of the cone. Any side-to-side standing waves, reflections, etc are pushed up about an octave. Related to this is an improvement in high frequency dispersion, widening the sweet-spot, and reducing the laser-like hot spot some full-range drivers suffer from. The smaller effective cone diameter means that the point at which beaming starts is pushed up and due to the shaped nature & the hardness of the plugs some HF energy is redirected.
Phase plugs in natural alder or yellow cedar (the latter is our preference but raw material is not always available) in 5 sizes. Plug Blanks are also now available for 40% less for those who would like to DIY. Finished plugs come with magnetic mounting for snap into place installation with easy adjustment. Blanks can be requested with magnets pre-intsalled but normally ship with none.
Steel screws on the bottom provide magnetic mounting. FE103e plugs shown.
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