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Has anyone tried to insert an RCA Cable from a Pioneer's "Zero Signal Terminal" to Pre Amp's input connector?If so, did you plug the RCA plug into the Pre Amp's positive or negative input?Any positive impact?I'm too chicken to try it.....
Hooked up the cable from the Pioneer's "Zero Signal Terminal" to a spare negative input connector on my ModWright Pre Amp.I noticed a reduction in tube hiss when I put my ear right on the tweeter. (actually, very little to begin with)I was quite surprised to find an improvement to the highs and a bit more precise imaging.Therefore, I enthusiastically recommend everybody gives this a try!
That’s great I will have to do some more critical listening to see if the positive or negative inputs make any difference. Thanks Paul
Since it's obvious that the Pioneer Organization is clueless, I decided to waste 1-1/2 hours of my life looking up reviews of the Pioneer player to see what I could glean. The following are the best examples:AudioholicsThe player also features a Zero Signal Terminal connection, which connects to any unused audio or video RCA input jack on an AV receiver or processor. The Zero Signal connection aligns the reference ground level between the devices, providing “precise and high-quality signal transmission,” according to Pioneer.Home Cinema MagazineThe Zero Signal Terminal is a simple cinch connection that connects you to an unused cinch input on your AV receiver. This allows the player to align the reference level (the ground (GND)) of both devices. This avoids any potential differences and guarantees the player the best possible transmission. We tried this with our Onkyo AVR and a music file that contains silence. However, when we connected the ZST there was a very soft hum in the speakers, a deterioration rather than an improvement. For that we had to set the amplifier very loud, so in practice the impact seems very limited. Anyone who doubts leaves the ZST connection away, the player also delivers fantastic sound.Top New ReviewThere’s an Ethernet jack (no wi-fi) for network playback and BD- Live functionality, a RS232 port for remote control, the aforementioned two-channel analogue audio output (no analogue video outputs) and a grounding terminal referred to as ‘zero signal’. This ‘barrel-only’ (the centre-pin is unconnected) socket would be connected via a phono- to-phono cable to a spare input or output on the rear panel of your audio gear, bringing the LX500 to the latter’s ground potential; I note that although the LX500 has an IEC mains socket, it lacks an earth pin and so it’s ‘floating’.AudioTIf you want the ultimate in audiophile sound quality from this player then the Zero Signal Terminal is something that owners of any connected amplifier can take advantage of. The Zero Signal Terminal is a Pioneer-original feature dedicated to tuning audio and video quality without signal transmission. By connecting the Zero Signal Terminal with the audio/video input terminal of an AV receiver etc, the reference level (GND) of the audio/video signals is aligned between the two devices, and the potential difference is suppressed, allowing a precise and high-quality signal transmission.I don't know the source of their additional new information, but it wasn't from "Customer Service".BTW, their explanations really are superficial as they don't explain how the grounds are equalized from a circuit POV.
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