How to Set a Low-Pass Filter (LPF)
LPF allows only bass to pass through by filtering out high frequencies.
1️⃣ Play a test tone: at your desired crossover frequency (e.g., 60Hz).
2️⃣ Measure the AC voltage: at the amplifier’s terminals using a DMM.
3️⃣ Note the baseline voltage: (V₀) before adjusting.
4️⃣ Calculate your target voltage:
Vₜ = V₀ × 0.707
5️⃣ Adjust the LPF knob: slowly turn it down while watching the DMM.
6️⃣ Finalize the setting: stop adjusting when the voltage reaches Vₜ.
✅ Your LPF is now set! It will filter out frequencies above your chosen crossover point.
How to Set a High-Pass Filter (HPF)
HPF filters out low frequencies, allowing mids & highs to pass.
1️⃣ Play a test tone: at your desired crossover frequency (e.g., 80Hz).
2️⃣ Measure the AC voltage: at the amplifier’s terminals using a DMM.
3️⃣ Note the baseline voltage: (V₀) before adjusting.
4️⃣ Calculate your target voltage:
Vₜ = V₀ × 0.707
5️⃣ Adjust the HPF knob: slowly turn it up while watching the DMM.
6️⃣ Finalize the setting: stop adjusting when the voltage reaches Vₜ.
✅ Your HPF is now set! It will filter out frequencies below your chosen crossover point.
