MOON RCA DC Filter (Pair)

The MOON RCA DC Filter is an inline filter for the unbalanced RCA signal path that reduces DC voltage in the signal – designed for cases where a power amplifier shuts down due to detected DC voltage. It's supplied as a pair.

What's the RCA DC Filter for?

Because some preamp/power amplifier combinations carry a small DC component in the signal that can trigger a power amplifier's protection circuit – causing the amplifier to shut down. The DC filter is looped into the RCA path between the source or preamp and the power amplifier and blocks that DC component. Result: the chain runs stably, and the amplifier's power becomes reliably usable. A targeted troubleshooting tool, not a sound tweak for everyone.

Who is the filter for – and who isn't it for?

For anyone whose power amplifier shuts down due to DC detection and who wants to fix the problem cleanly in the RCA signal path.

Straight talk: if your system runs flawlessly, you don't need the filter – it solves a specific problem and isn't a general sound improver. We'll clarify beforehand whether it helps in your case.

Our verdict

A specialist tool against a specific annoyance: DC-related power amplifier shutdown. If that's your issue, the RCA DC Filter is the clean solution. Whether it fits your case is something we'll tell you honestly at HD Zürisee in Wädenswil.

Technical Data

• Type: inline DC filter, unbalanced (RCA)
• Use: between source/preamp and power amplifier
• Purpose: reduces DC voltage in the signal path
• Supplied as: pair
• Note: an RCA cable set is additionally required for looping it in
• Warranty (MOON Switzerland): 5 years
• What's included: 1 pair of RCA DC Filters

Frequently Asked Questions

What does the MOON RCA DC Filter do?
It reduces DC voltage in the RCA signal path. That helps when a power amplifier shuts down due to detected DC. The filter is looped in between preamp and power amplifier and is supplied as a pair for stereo.

When do I need the filter?
Only if your power amplifier shuts down due to DC detection – usually caused by the upstream source or preamp. If your system runs stably, you don't need it. If in doubt, we'll check whether it makes sense in your case.

What's the difference to the XLR DC Filter?
The function is identical – both reduce DC in the signal path. The RCA DC Filter sits in the unbalanced RCA path, the XLR DC Filter in the balanced XLR connection. You choose the variant to match your cabling.

Why buy the MOON RCA DC Filter from HD Zürisee?
Because a filter like this only helps in the right case. We clarify the cause of the shutdown, choose the matching variant, and as an authorised MOON dealer in Wädenswil we're there for warranty and service – with our own technician.

Goes well with

You'll find matching power amplifiers under Power Amplifiers, cables under Cables. The whole brand is shown in the MOON Collection.