W frame sub

dipole-impedance-half-sides	dipole-impedance-nosides	dipole-impedance-nosides-foam-reverse-polarity.	U plus driver - This pict shows how the U shape fills the empty cavity.
U is in place	U finished - A stack of U shaped piece of wood are glued together	Dipole sub on his new stand	U is inserted
Dipole sub version 2 with full side walls - Waterfall plot	PAW15R_WF	The effect of U and sidewalls on the FR.	Linkwitz configuration

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