I essentially agree with clearthinker. Ports are a way of pushing the bass cut off a little lower at the expense of a much steeper cut off. I have never heard a ported loudspeaker produce what I consider to be accurate bass.
With todays high powered amplifiers, DSP and the incredible drivers we have today you can make a sealed woofer/subwoofer do almost anything you want without any port noise.
Clearthinker in my experience 30 Hz is asking a bit much of a panel speaker. I roll my Sound Labs off at 120 Hz to sealed subwoofers. The Sound Labs will go down to 40 Hz nicely if a bit on the lumpy side but removing the bass from them creates a large improvement in midrange and treble clarity not to mention headroom. How many ESLs have you seen do 110 dB without vaporizing? Another benefit is that distance from the front wall becomes less critical.
With todays high powered amplifiers, DSP and the incredible drivers we have today you can make a sealed woofer/subwoofer do almost anything you want without any port noise.
Clearthinker in my experience 30 Hz is asking a bit much of a panel speaker. I roll my Sound Labs off at 120 Hz to sealed subwoofers. The Sound Labs will go down to 40 Hz nicely if a bit on the lumpy side but removing the bass from them creates a large improvement in midrange and treble clarity not to mention headroom. How many ESLs have you seen do 110 dB without vaporizing? Another benefit is that distance from the front wall becomes less critical.