Reply to thread

Message

<blockquote data-quote="BrianChia" data-source="post: 3615575" data-attributes="member: 576132">The port should produce frequencies from the air resonating within the port which peaks at the Fb. However, it shouldn&#039;t produce any sound from the backwave of the speaker itself. The backwave of the speaker should be damped within the main chamber and it should produce port resonance at the tuned frequency. The actual port should not be used to damp the backwave of the speaker. That would be a transmission line design (which requires stuffing within the line to dampen any harmonics). With too much port area and no stuffing it would be like building an open baffle speaker with shitty sound. Also a larger port causes phase cancellation issues and group delay which further affect sound quality.Dan, 78 in^2 should definitely be plenty enough for 1 single 15&quot;. I would go with the deflectors in the corners, though, and use a roundover bit on all of the port&#039;s square edges.</blockquote>

[QUOTE="BrianChia, post: 3615575, member: 576132"] The port should produce frequencies from the air resonating within the port which peaks at the Fb. However, it shouldn't produce any sound from the backwave of the speaker itself. The backwave of the speaker should be damped within the main chamber and it should produce port resonance at the tuned frequency. The actual port should not be used to damp the backwave of the speaker. That would be a transmission line design (which requires stuffing within the line to dampen any harmonics). With too much port area and no stuffing it would be like building an open baffle speaker with shitty sound. Also a larger port causes phase cancellation issues and group delay which further affect sound quality. Dan, 78 in^2 should definitely be plenty enough for 1 single 15". I would go with the deflectors in the corners, though, and use a roundover bit on all of the port's square edges. [/QUOTE]

Verification