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<blockquote data-quote="Buck" data-source="post: 8870869" data-attributes="member: 591582">&quot;Here&#039;s a frequently asked question: if a quarter-wave is 90 degrees in phase length, why does it transform you 180 degrees on a Smith chart? Consider that here we are plotting reflection coefficients on the Smith chart. Thus, an imaginary signal that you send through a transmission line of one quarter wavelength must travel fully half a wavelength, since it travels down the quarter-wave line, gets reflected, then returns down the quarter-wave line.&quot;[URL unfurl=&quot;true&quot;]https://www.microwaves101.com/encyclopedias/quarter-wave-tricks[/URL]There&#039;s an astonishing similarity between the physics of the resonances of electronics (like a wire) and the resonances of air with sound (like a sub t-line box), like how I&#039;ve designed boxes.&nbsp; It&#039;s all just waves moving through a medium.&nbsp; Your different boxes for the same sub change the electrical nature of the sub the amp sees, so keep that in mind.&nbsp; In other words, different box types and styles greatly impact sub coil movement through the motor magnet, which (can) greatly change the electrical impact of the sub&#039;s stress or feedback into the whole system (sub impedance changes).</blockquote>

[QUOTE="Buck, post: 8870869, member: 591582"] "Here's a frequently asked question: if a quarter-wave is 90 degrees in phase length, why does it transform you 180 degrees on a Smith chart? Consider that here we are plotting reflection coefficients on the Smith chart. Thus, an imaginary signal that you send through a transmission line of one quarter wavelength must travel fully half a wavelength, since it travels down the quarter-wave line, gets reflected, then returns down the quarter-wave line." [URL unfurl="true"]https://www.microwaves101.com/encyclopedias/quarter-wave-tricks[/URL] There's an astonishing similarity between the physics of the resonances of electronics (like a wire) and the resonances of air with sound (like a sub t-line box), like how I've designed boxes. It's all just waves moving through a medium. Your different boxes for the same sub change the electrical nature of the sub the amp sees, so keep that in mind. In other words, different box types and styles greatly impact sub coil movement through the motor magnet, which (can) greatly change the electrical impact of the sub's stress or feedback into the whole system (sub impedance changes). [/QUOTE]

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