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Newfangled

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    High pinched whistling

    in Technical/Restorations

    Posted

    On 7/5/2021 at 8:17 PM, VDS said:

    I’ve got a persistent very high pitched whistle, whine, ear piecing frequency.

    Not very loud, but clearly audible,  sure I would have heard it in previous location, heard as soon as I got system up and running in new location.
    Seems to be coming from the Xilica 4080xp, stops when I turn Xilica off.  

    Yup, I experienced the same exact thing when I tried using a First Watt SIT-3 amplifier.

     

    I ran XLR from Xilica XP4080 to RCA on the First Watt.

    Monoprice 104784 3' Premier Series XLR Female to RCA Male 16AWG Cable

    https://www.monoprice.com/product?p_id=4785

    I confirmed that this is a 3 conductor cable. Signal + goes to center pin on the RCA and the - and shield are soldered together on the RCA outer conductor.

    I experimented desoldering the shield and leaving it floating on the RCA end and it didn't make a difference. Whine was still present.

     

    I only heard the whine from the Jubilee HF stock compression driver left and right. Not noticeable form the LF cabinets.

    I disconnected everything in my setup and traced the noise to the Xilica.

     

    Unplugged everything.

    I didn't plug in any inputs into the Xilica.

    I plugged in the First Watt SIT3 and connected the left speaker cable. Turned amp on. Silent.

    I plugged in the Xilica and connected the Monoprice XLR to RCA cable. Silent

    Turned on the Xilica and when the internal relay turns on after a few seconds I hear the high pitched whine.

     

    Is it possible that this is an issue with the Xilica? Should I contact them? The date code on my Xilica is from December 2020. Curious if the original poster and I have issues with our units. Or is this just an inherent issue with using XLR to RCA with high sensitivity drivers?

     

    I didn't hear the noise when I previously used the Crown D75a or a pair of Amp Camp monoblocks which both had balanced inputs. I'm Debating now if I want to  experiment with the Jensen transformers or sell this amp and look into other amps that offer balanced inputs. Also considering other amps with balanced inputs; Cyrus Stereo 200, First Watt J2, Benchmark AHB2.

     

     

    Xilica XP active crossover integration into my system

    in Technical/Restorations

    Posted

    I listen to 100% digital sources. I have a Parasound P6 playing middle man before the Xilica DSP in my system.

     

    Digital source (Roon)  - converted to analog (Parasound P6) - converted to digital by the Xilica internally for processing - finally back to analog to Jubilees

     

    I noticed that the XD-4080 offers a AES/EBU I/O.

     

    Could I get something like a PI2AES to go digital from a Raspberry Pi into the XD-4080? I'd dial in the overall gain on the XD4080, and make fine adjustment within Roon.

    https://www.pi2design.com/store/p19/PI2AES_-_PRO_AUDIO_SHIELD.html

     

    If it worked it would end up with:

    Digital source (Roon) - Digital PI2AES straight into the Xilica XD4080 - final Analog conversion to Jubilees

     

    Do you think using AES into the XD-4080 have any improvement on sound? Am I being OCD trying to reduce the extra digital to analog conversion in my current setup?

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