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Originally Posted by brucelidat Would this make much difference if I already have 18" resonators? That is what my system has too, 18 inch resonators in the H pipe section.
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That is what my system has too, 18 inch resonators in the H pipe section. What these resonators do that is very different than a pass through type resonator. A Helmholtz resonator is tuned (by length) to cancel out certain frequencies and in this case the 130-160Hz (2000-2800 rpm) drone. Works pretty well.
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