Amplifier Settings
A guide to your amplifier's LPF, subsonic filter, bass EQ, gain, and phase settings.
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This guide explains the key settings found on Skar Audio monoblock amplifiers.
Low Pass Filter (LPF)
The Low Pass Filter blocks frequencies above its set level. For instance, a 125 Hz setting permits only lower frequencies through to speakers or subwoofers.
Subsonic Filter
Works oppositely to LPF by blocking frequencies below its set level. A 30 Hz setting allows only higher frequencies to pass through. This protects your subwoofers from extremely low frequencies that can cause damage.
Bass EQ
Designed to enhance low frequencies but should remain in the off or 0 dB position in most scenarios.
Gain
Contrary to misconception, the gain control is not the same as a volume knob. Instead, it optimizes signal-to-noise ratio by matching input sensitivity with the source unit's output voltage.
Phase
Adjusts subwoofer polarity direction. Two primary uses include:
- Correcting inverted subwoofer orientation
- Coordinating multiple subwoofers across different amplifiers that operate in opposing directions
Master/Slave Switch
Found on strappable amplifiers, this setting designates one unit as Master and another as Slave when combining two identical amplifiers for increased power output. Consult your amplifier's manual for proper configuration.