Holmz Posted November 26, 2022 Share Posted November 26, 2022 I start off with admitting that I am ore towards the “cable denier” than not. And it is time to gather some input from the “mind hive” of the community knowledge and experience. I look at the rack and see a “snake festival” of cables. I’ve only have had significant hum on the DAC when connected to the computer. But recently I did see 50 Hz and harmonics on the phono stage when digitising the signal via the ADC part of the DAC. It was ~ -60dB and one could hear it between tracks, but I had a very long XLR coiled up between the phono and the DAC. In any case, I am putting together the new rack/table… It is a bit of challenge as there will be a TV lift on the back. So I can cable it up, and then drop the TV and move it, but it will be skateboards and grunting. And I do not want cables to foul the TV, so they will likely be behind a thin panel. Incoming mains power on IEC connectors: TV AVR Preamp and phonostage powewr supply which supplies 12V out in 4x LEMO connectors. TT power supply LPS/wort DAC power supply LPS/.wort Power amp 2x 12” subs (likely for the HT front end. But I need to figure out where they should ideally be located. Or power to a bass amp. All these generally have ~2M (6’) black standard IES cords. Most of the switching worts were replaced with LPS versions. I would like to avoid all of the cowboy lassos holding the extra length of wound up cord, which is using zip ties or Velcro straps. And I am somewhat concerned with EMI emissions, or minimising them. 12V DC: TT (long black cord) DAC (long black cord) Preamp (LEMO) Phono stage (LEMO) 12V trigger of the the AVR to turn on amps. I am not as concerned with the 12V in terms of emissions. I can probably get a LEMO made to connect the DAC to the 4-port power supply. Thoughts and Questions: Currently I have a rack with both US and Au voltage rackmount power strips, and everything plugged into those. I could do similar in the new rack, but everything will now be 230v. There will be 3 columns of racks in the table (maybe there is room for 4…) Center channel will be in the middle with power amp underneath it I think I should probably consider keeping all of the mains voltage gear on say the left. So the AVR and the power supplies. And maybe the DAC? And the TT on the top on the right with the preamp and phon stage under it. Then the are physically separated to an extent. Mains: Without going to a full on conditioner, I am considering just a power strip. There is an IEC block from McMaster Carr that has a built in EMI filter. I think it is an inlet So I could go from the wall into that and do some filtering of EMI on the way in. And then I could house that in a box on the back and have a homemade version of a power strip. Should I just make my own power cords to get the right length? E.g. cutting the lead off of the existing one and putting on something like a Furutech IEC end? And then is there any benefit in changing the cord to something like a western electric cotton jackets version? Or do the coils of extra Power cord not matter much? (So live with them and/or hide them) 12V: The Preamp and phono stage are on short LEMO cables. I could fashion the DAC cable as a LEMO to normal 12V inlet Or I could just coil them into lasso and hide them Same story with the TT’s 12V power cord. ICs: TT to phono stage will be pretty short. And if the preamp is with the phono stage it is also a short path. If I put the preamp on the left then I guess I just keep the phono ICs away from other cables. Should I be concerned at all about keeping them apart? I use primarily Mogami cable and Neutrik XLRs or ProFi RCAs, but did pick up some silver wire with the cotton jacket, so I can use those to the phono stage and from it to the preamp. Should I also consider the silver wire to the amp? I’ve seen the ETI versions, which are 10x the cost of the Neutrik- is there much benefit? I am not sure if the IEC connectors matter a whole lot, but if I am making up some cables, I could consider them if there is a thought that they work better. The ICs should generally be easy as their length is either a hair too short or way too long with store bought lengths, and the wire cutters do a fine job of getting a bespoke length for DIY. Any sage thoughts? Lastly I picked up an MP-LPF (XLR) as the tail end of the preamp has a HT bypass, but it only on zone1 which is the XLR inlet outlet pair. Zone two has two pairs of RCAs, which I am currently using. I have a single 2W sub, but it. Is 110v… I can call Vandy HQ, but I doubt that there are 230v plate amps for this as it is “last millenium”. I am thinking of using a pair of 12” subs for the HT and those are either XLR or RCA inputs for the Hypex plate amps. I think my only option is to use a short XLR Y-cable and then run the longer cable to the amp and sub for each L/R channel I cannot use the RCAs as the preamp needs to be powered for the zone2,.. hence HT is out. And I cannot have two amps connected to the speaker and use RCAs for 2 channel and the XLRs for HT, as an unpowered amp is not disconnected via relays, so the HT amp would be looking into the tube amps output transformer. Ths is obviously a good sales pitch opportunity for the Quatros over the Treos. Which brings up the question of whether the Quatros are connected with an IEC connector or a fixed cable. I suspect it is the later as the shop mentioned a different bass amp in the 230v Au version than in the 110v models. I know a lot of people here using Niagara power conditioners, and maybe they help, But I seem to see them be more of “a requirement” for digital. Analogue seems to not care as much about power, and obviously there is no need for internet, USB cords, etc. So my perception is that analogue seems more forgiving of power. Plus my phono stage and preamp use a swish power supply, and also can have a battery attached to totally run independent of the incoming mains power, So I would more likely to be swayed in getting the battery than a power conditioner. At least it sounds pretty OK. Any thoughts, musings and comments are welcome. 1 Link to comment Share on other sites More sharing options...
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