HiPass

Four fixed high pass filters in 2 HP, 3-pole (-18 dB/oct) with a Butterworth response: the first two cut at 30 Hz to take out rumble and DC offset before a mix, the last two at 100 Hz, as the low-cut of a mixing desk.

Key features

• Filters 1 and 2: 30 Hz, -18 dB/oct, a DC remover and extreme low frequency cut
• Filters 3 and 4: 100 Hz, -18 dB/oct, the usual low-cut of a mixer
• Four inputs and four outputs, one per filter
• Skiff friendly, 29 mm deep