Hi,
I am quoting Zaph audio driver size and port recommendations.
"8 to 10" woofers will use a 2" flared port. 12 to 15" will use a 3" flared port. These are the pre-made, cut to size "Precision" ports. These are of course adjustable in the middle section. My own experience finds people making their ports way larger in diameter than they need to be, which relates to longer ports."
Aren't the port diameters they are recommending too small, I mean 3" port for a 15" woofer of any decent xmax will cause port compression/chuffing? How do we take these recommendations? Are they saying that we are always conservatively estimating port dia and going for overkill?
Thanks and Regards,
WonderfulAudio
I am quoting Zaph audio driver size and port recommendations.
"8 to 10" woofers will use a 2" flared port. 12 to 15" will use a 3" flared port. These are the pre-made, cut to size "Precision" ports. These are of course adjustable in the middle section. My own experience finds people making their ports way larger in diameter than they need to be, which relates to longer ports."
Aren't the port diameters they are recommending too small, I mean 3" port for a 15" woofer of any decent xmax will cause port compression/chuffing? How do we take these recommendations? Are they saying that we are always conservatively estimating port dia and going for overkill?
Thanks and Regards,
WonderfulAudio
John Krutke's (Zaph) opinion was for main speakers, not for dedicated subwoofers
The vented alignment I typically use doesn't have a name. I'm sure I didn't invent it, but I haven't seen much out there to describe it. Normally, I'll tune lower to get a more gradual rolloff that works better with room response and puts power handing where I need it. It's basically a type of tuning that is a combination between sealed and vented alignments. Note that this is not an Extended Bass Shelf (EBS) tuning. That kind of tuning implies an oversized enclosure volume, with a dip above the tuning frequency. You get the lowest anechoic F3 with that configuration, but in a real room you get an overbearing one-note bass at the tuning frequency, a huge midbass dip, and crappy power handling.
I will never vent a woofer that is 4" or smaller. I've seen many people that do however. The problem with that is the tuning frequency will be too high, and there will always be substantial music output below the tuning frequency, easily distorting or destroying the woofer.
http://www.zaphaudio.com/
http://www.zaphaudio.com/mantras.html
The vented alignment I typically use doesn't have a name. I'm sure I didn't invent it, but I haven't seen much out there to describe it. Normally, I'll tune lower to get a more gradual rolloff that works better with room response and puts power handing where I need it. It's basically a type of tuning that is a combination between sealed and vented alignments. Note that this is not an Extended Bass Shelf (EBS) tuning. That kind of tuning implies an oversized enclosure volume, with a dip above the tuning frequency. You get the lowest anechoic F3 with that configuration, but in a real room you get an overbearing one-note bass at the tuning frequency, a huge midbass dip, and crappy power handling.
I will never vent a woofer that is 4" or smaller. I've seen many people that do however. The problem with that is the tuning frequency will be too high, and there will always be substantial music output below the tuning frequency, easily distorting or destroying the woofer.
http://www.zaphaudio.com/
http://www.zaphaudio.com/mantras.html