WebOct 5, 2013 · A 4" PPort can blow a LOT higher velocities than a square ended 4" id round … WebSep 21, 2006 · Generally, you want to keep the port large enough to keep velocity down, so that port noise is minimized. It varies based on the frequency, and who you ask, but I think generally most people try to keep port velocity below 20m/s. But as you've noticed, doing that can sometimes make the ports too long to easily fit.
AES E-Library » Maximizing Performance from Loudspeaker Ports
WebNov 28, 2008 · Maximum port velocity achievable without producing chuffing is not a … WebApr 9, 2024 · Build a sub tuned to 8 Hz that has a port velocity of less than 20 meters per second--done! Plenty of DIY people do it the world over--there are issues with that (HUGE ports) which mean LONG ports in smaller enclosures. Solution? BIG boxes, not wee bitty little boxes either. The design is called LLT or Large Low Tuned. paella 1334 montreal
Optimal Port Flare Geometry diyAudio
WebJun 1, 2010 · Larger port area = reduced air velocity = lower port noise. Lower port velocity = lower gain. From this we can see that port area & length is a balance of velocity (not so little as to reduce gain, no too much as to cause 'chuffing'), group delay (lower is better for SQ), and length (workable within your physical constraints). WebAug 7, 2006 · The generally accepted rule of thumb for preventing turbulence and port … WebJul 30, 2014 · Let's use the 86mm port (3in) as a reference Notice as you increase the radius of the flare the higher the velocity of the air traveling through the port can have with no chuffing.However there becomes a point to where no matter the radius of the flare you can not achieve any higher usable velocity, and you will have chuffing at that point and ... インドメタシン 副作用