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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 28th February 2018, 12:09 PM   #1
Altecboy is offline Altecboy  United States
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Default Input DC blocking capacitor

The active crossover feeding my SSE has a bit of DC offset, so installed a series blocking capacitor at each input. Do I need to precede this with a hot to ground 1/4 meg resistor?
thanks for any input.
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Old 28th February 2018, 02:48 PM   #2
chip_mk is offline chip_mk  Macedonia
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The purpose of such hi value resistor is to provide discharge path for the capacitor after detachment of the interconnection cable. Otherwise if the cap remains charged, shorting the hot wire and ground will present the remained voltage to the input of the amp thus causing a "thump", whose magnitude can vary from negligible to destructive, depending on the remained voltage.
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Old 28th February 2018, 08:04 PM   #3
Altecboy is offline Altecboy  United States
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Makes sense Chip. thanks.
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