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I think the antenna is only for Wi-Fi, not for remote control. A few months ago I completely removed the Wi-Fi module (as well as the antenna) and the remote control worked normally quite far from the amplifier (7-8 meters).
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My anti-noise "tweak" was to fit an earth mat and bond the supply to the Devialet and other audio components to it
Prior to this, I could measure 0,9 VAC on the earth wire
This reduced the noise floor somewhat
Cape Town - South Africa, the home of good wine
Mercury Pi2 & Gentoo, Expert 440PRO CI. 4Tb SSD. ML Electromotion, REL sub. 2 x Dachshunds
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The inner shell case is already aluminised and electrically earthed. I suppose the designers thought of RF leakage when designing the amplifier
Cape Town - South Africa, the home of good wine
Mercury Pi2 & Gentoo, Expert 440PRO CI. 4Tb SSD. ML Electromotion, REL sub. 2 x Dachshunds
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but I think the antenna will be connected to the internals somehow, otherwise it would not work if you want to use it. The question is what happens internally with the signal picked up by the antenna. This signal is definitly much weaker if the antenna is removed. But not sure if this can really affect the SQ. But my antennas are removed for a long time already...