subsonic filter

[Archie1185 10+ year member]

Do I need a subsonic filter for my L7?

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[squeak9798 5,000+ posts]

Depends on the box.

If you are using a ported enclosure, it's a good idea to use one and set it to 1/2 octave below tuning.

If the box is tuned low, you may not need one.