Shouldn’t it be floating since you have two sources to your pre? I should only be one path to ground and you have two with the ND555 set to chassis.
I asked both Naim and my dealer what I should set the ground to with an LP12/Geddon, both said it should be grounded unless I was using the Ndac or CDP555. The general consensus is listen to both and see which one you prefer. With 3:8 I used it grounded as it sounded better, everything had a touch more edge and liveness. However, with 3:10 many have found that the floating position now removes that edge and I completely agree this now sounds much better. Well, maybe not better but certainly more listenable.
I actually managed a four hour session the other night. That the longest one I’ve had since 3:10 was introduced! The stock EE8 SMPS was sounding particularly good. I tried swapping to my LPS but it sounded a bit more laid-back and boring, so I’m definitely with you on the SMPS speed thing.
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New ND555 network cable observation. SR Alpha + Muon pro >> Sigma. The Alpha + Muon pro combo is just at another level. Got my soundstage to the point where sounds originate behind my ears. And increased engagement compared to Sigma which I thought impossible. Highly highly recommended combination with the ND555.
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Is that combo in place of the Sigma or with the Sigma also in line? I have to say that Sigma gave me the widest and deepest stereo image I’ve ever heard. I’ve got a pretty large room (12m x 6m) and it extends well beyond the boundaries, often with sounds that appear to come from behind me. This was especially apparent with 3:8 but much less so with 3:10. With 3:8 you also picked up on venue acoustics, which added another dimension to the music.
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This is in place of the Sigma, for around the same cost. No Sigma in line. The improvement is significant.
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It took me a full two months to figure this out and I almost sold the ND555 twice in the process. I thought I was losing my mind. But I finally found the culprit. Replaced the Powerline with a regular cable and the harshness is completely gone! This was accidental and the last place I expected I needed to look - this was after all the cable that was bundled with the PS and looked brand new. I subsequently tried this Poweline on other components (preamp, amps) and everything sounds off and harsh with it. This cable is definitely faulty.
All I can say is the ND555 (which is on 3.8) now sounds organic, smooth, velvety yet somehow with impressive texture, nuance and detail. The pairing with 300 series components (332/300 and NAP350s) is sublime and highly recommended.
4 Likes