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Subwoofers
What levels to use for frequency, boost and gain?
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<blockquote data-quote="n2audio" data-source="post: 8655173" data-attributes="member: 540940"><p>Frequency -- generally 80-100hz, but it's really just personal preference. At 100hz your front speakers should start to come to life, and generally, subs trying to operate at higher frequencies tend to get "muddy". The dial adjusts from 50-250 so around 25% should be ~100hz.</p><p></p><p>Boost -- A band pass enclosure like that is already going to have peak output in the 50-60hz range. Adding boost at 45hz will only produce worse sound quality. Zero is the best setting for that.</p><p></p><p>Gain -- this is set according to the signal strength of your head unit. There is no specification for the level adjustment on that amp, but typically they run from ~5v up to 1/4v.</p><p></p><p>So if you have a head unit with high voltage preamp outputs -- like 4v, your gain will be set relatively low, probably &lt;25%.</p><p></p><p>Mid-level HU's typically have 2v pre-amps, but even then the gain usually doesn't need to be much over 1/2. 75% is probably too high.</p><p></p><p>The most straightforward way to set a gain is to start with the dial at its minimum setting. Play music at 75-80% volume and slowly increase the gain setting until the sub starts to distort. Then back it off slightly. </p></blockquote><p></p>
[QUOTE="n2audio, post: 8655173, member: 540940"] Frequency -- generally 80-100hz, but it's really just personal preference. At 100hz your front speakers should start to come to life, and generally, subs trying to operate at higher frequencies tend to get "muddy". The dial adjusts from 50-250 so around 25% should be ~100hz. Boost -- A band pass enclosure like that is already going to have peak output in the 50-60hz range. Adding boost at 45hz will only produce worse sound quality. Zero is the best setting for that. Gain -- this is set according to the signal strength of your head unit. There is no specification for the level adjustment on that amp, but typically they run from ~5v up to 1/4v. So if you have a head unit with high voltage preamp outputs -- like 4v, your gain will be set relatively low, probably <25%. Mid-level HU's typically have 2v pre-amps, but even then the gain usually doesn't need to be much over 1/2. 75% is probably too high. The most straightforward way to set a gain is to start with the dial at its minimum setting. Play music at 75-80% volume and slowly increase the gain setting until the sub starts to distort. Then back it off slightly. [/QUOTE]
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What levels to use for frequency, boost and gain?
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