Reply to thread

Message

<blockquote data-quote="n2audio" data-source="post: 4640432" data-attributes="member: 540940">actually I did the numbers backwards - I&#039;ve edited things above.It&#039;s really not that complicated.&nbsp; You just have to recognize crossovers don&#039;t &quot;block&quot; unwanted frequencies, they roll them off at a particular rate depending on the slope of the crossover.The Profile amps are the typical 12db/octave.Tuning the enclosure is just a function of the volume of the box and the dimensions of the port.&nbsp; Based on the free air performance of the subwoffer a series of complex calculations (and/or testing different enclosures) can determine the best enclosure for any given sub.&nbsp; The manual for the JL 8w3 gives pretty specific instructions for building a good ported enclosure -- I would just stick to something pretty close to their specs if I were you.As far as amp settings - you&#039;ll set the crossover switch to low pass, and I would start with it high, you can take it down as low as you want if you don&#039;t like the sound you get with up high.The gain setting depends on the signal strength coming from the source unit, but to save you further confusion I would just put it somewhere between 9:00 and 12:00.Use as little bass boost as possible.&nbsp; None is ideal.The manual gives some pretty good guidelines for adjusting the amp&#039;s settings.</blockquote>

[QUOTE="n2audio, post: 4640432, member: 540940"] actually I did the numbers backwards - I've edited things above. It's really not that complicated. You just have to recognize crossovers don't "block" unwanted frequencies, they roll them off at a particular rate depending on the slope of the crossover. The Profile amps are the typical 12db/octave. Tuning the enclosure is just a function of the volume of the box and the dimensions of the port. Based on the free air performance of the subwoffer a series of complex calculations (and/or testing different enclosures) can determine the best enclosure for any given sub. The manual for the JL 8w3 gives pretty specific instructions for building a good ported enclosure -- I would just stick to something pretty close to their specs if I were you. As far as amp settings - you'll set the crossover switch to low pass, and I would start with it high, you can take it down as low as you want if you don't like the sound you get with up high. The gain setting depends on the signal strength coming from the source unit, but to save you further confusion I would just put it somewhere between 9:00 and 12:00. Use as little bass boost as possible. None is ideal. The manual gives some pretty good guidelines for adjusting the amp's settings. [/QUOTE]

Verification