increasing subwoofer range

[docferdie]

<font color='#000000'>I have a velodyne CHT8 that rolls of at around 34 Hz. Thought about sealing the port to make it go lower. Will this work? I know the ported design is supposed to make the sub louder but at the expense of frequency response. I don't really need a loud sub. I just want to hear the frequencies that I have been missing.</font>

 

[Guest]

<font color='#000000'>No, sealing your port won't extend the response lower, it will cut off lower response. &nbsp;Ports do make the speaker a little more efficient, but mostly they extract more low end from the woofer. &nbsp; Blocking the port will make what bass is left a little tighter, less group delay.</font>

 

[docferdie]

<font color='#000000'>thanks for the info</font>

 

[annunaki]

<font color='#000000'>Depending upon the driver's t/s parameters you could risk damage to the speaker. If the driver's sealed enclosure recommendations are much smaller than the now sealed enclosure's volume, the woofer may reach mechanical limits very easily with little power. Basically it could be in too large of an enclosure. If the enclosure is now smaller than recommended, you could wind up with an undesired hump in frequency response with poor, sharper, lowend rolloff response. If for some odd reason it would be a spot on recommended sealed enclosure, with a qtc right around .707 you would experience greater low end response (greater meaning lower attainable frequencies) due to a smoother 12db per octave rolloff. The sub may also tighten up in transient terms as well. The negative here would be about 3db less overall volume, which is not huge, but is just noticeable. In any case, it should not be done without first contacting the manufacturer. Either to get the t/s parameters for the driver itself or see if it is possible. Usually, with a good manufacturer, what you have is about the best you can get from the setup.</font>

 

[jeffsg4mac]

<font color='#000000'>Unless you know all of your drivers parameters, you have no way to know what you would be tuning it to. You could damage the driver like was stated or make the response worse. If you want your sub to go lower then get a new sub.</font>

 

[Ross]

<font color='#000000'>If the sub itself isn't specifically designed for this type of configuration you may be doing more damage than good, like the others said. &nbsp;Some speakers actually come with port plugs for the end user to experiment with. &nbsp;If you want to increase the response or output of the sub, then you should worry more about room accoustics, placement, re-calibration, etc., and ultimately a new sub. &nbsp;I am unaware of any velodyne subs that implement plugs for their ports.

best,</font>

 

[docferdie]

<font color='#000000'>thanks for the responses. Helped me decide to purchase a new MK V76 (220 off MSRP too

)</font>

 

[Ross]

<font color='#000000'>MK Sub

Cool!

</font>