The High-pass Filter (HPF) is an essential tool in audio signal processing, used to remove unwanted low frequencies to help the loudspeaker system perform more clearly and stably. In Lake Controller, users can configure either the Input HPF or Low Output HPF depending on the system setup and signal processing requirements.
Understanding the High-pass Filter in Lake Controller
These two operating modes are designed to accommodate various sound system configurations - from large-scale live systems and fixed installations to professional touring setups.
Setting Up the Low Output HPF
To activate and configure the Low Output HPF, follow these STEPS:
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Select HPF ENABLE, then choose HPF Select.
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From the scroll bar in Lake Controller, select the desired filter type - supporting up to 24 dB/octave.
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Press HPF Set, then select YES to confirm the warning message.
This option is particularly useful when you need to filter only the lowest frequency band, for example, controlling the low-end output of a subwoofer system without affecting other channels.
Applying HPF to All Outputs (Input HPF)
If you need to apply HPF across all outputs, proceed as follows:
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Select CROSSOVER FUNCTIONS, then choose HPF Functions.
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Click INPUT HPF to activate the full-range filtering mode.
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In this mode, adjust the center frequency and observe how it affects all module outputs simultaneously.
Using Filter Edit, you can set the HPF center frequency as low as 10 Hz, ideal for systems that require extended low-frequency reproduction while still eliminating ultra-low-frequency noise.
Applications and Benefits of HPF
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Protect loudspeakers from low-frequency signals that cause distortion or overload.
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Enhance system clarity and efficiency, especially in outdoor venues or large auditoriums.
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Offer flexible customization for individual channel groups or entire modules - suitable for any professional sound setup.
Summary
With Lake Controller, configuring the High-pass Filter (HPF) becomes simple, precise, and highly adaptable.
Whether you are fine-tuning a subwoofer system, optimizing mid-high performance, or synchronizing full-range configurations, Lake’s HPF feature enables accurate and effective control over frequency response and overall audio quality.