GC Hifi Posted April 4 Posted April 4 (edited) I have either just wasted a whole lot of money or made a wise decision and as I have not yet plugged anything in as the electrician has just left only time will tell. So I decided to back myself into a bit of corner by mentioning what I am experimenting with in my main listening room before actually knowing the outcome, yes this could end up being a waste of time, but what if it isn't? At least this way we will soon know. Why am I? I often get asked if I think running separate power cables, and if so then with what gauge wire, to a listening room is worth the expense and what difference it makes, so I decided to find out for myself. Early on in this GC HiFi Hifi journey I did upgrade the power supplies to the three listening rooms and in my main listening room I actually had two separate standard 2.5 power cables run directly to the room on their own fuses, the reason I did this was so I knew there was no interference from other appliances and so I could play mono-blocks and or power amps through their own power supply away from the front end. Moving along, after having experienced how much difference various aftermarket power cables make from the wall to various components I decided I should go that step further than I had originally and see if I could actually improve the power to the room with different gauge wire. After speaking with my sparkie I decided what to try, so finally today I had run various sized cables from the fuse box to main room, that being 4mm and a commercial 6mm, the two existing 2.5's have been joined to make what is effectively a 5mm cable, that is stepped down to 4mm. Below are some happy snaps of the installation before I even plug one component in. If it makes a difference I'll report back, whether it is good or not, equally so if there is no obvious difference then that will be pretty easy to hear as well. Jeff (Cafad) is coming down to stay this weekend so apart from listening to some new gear I have here and while he doesn't know it yet he is going to have to listen to various power cabling comparisons. This will be interesting to find out at the very least. Please pardon my very average photos. cheers Terry The 4mm and 6mm commercial cable ready to be pulled up from the fuse box to the main room. below as shown a 2.5mm, 4mm and 6mm power cables. I already had two x 2.5mm dedicated cables installed several years ago for hifi, these are now joined to make a 5mm cable. Below the finished installation L/H/S, three double wall sockets wired to the 6mm commercial cabling (orange). Centre four double wall sockets powered by 5mm (2x 2.5 joined) power cabling. R/H/S one double and one single wall socket powered by 4mm power cable. All three cables are on stand alone fuses. There is also a four socket ethernet wall plate, this is connected with the usual Cat6 cabling. Above that is a wall plate with Atlas Cat 7 and Cat8 cabling. These four unmarked double plugs have the two x 2.5mm existing cables connected to deliver a 5mm cable to them. Edited April 7 by GC Hifi 16 4
Cafad Posted April 4 Posted April 4 So how many fuses/circuits is that now? Are the 4mm, 5mm and 6mm all on different breakers? Also, you do have beer, yes? 3 1 1
GC Hifi Posted April 4 Author Posted April 4 1 minute ago, Cafad said: So how many fuses/circuits is that now? Are the 4mm, 5mm and 6mm all on different breakers? Also, you do have beer, yes? Bugger I didn't expect you to see this before coming down tomorrow, yes all on separate fuses and can you remind me what beer you don't like and I'll go buy it. ... 8
GC Hifi Posted April 4 Author Posted April 4 (edited) 12 hours ago, joz said: Hmmmm, should be interesting regardless of the outcome. Well very early days Joz, however I can say that all three different gauge cables make this system sound quite different, two of the combinations I have had plugged in with amps and streamers just sitting there ticking over since about 1pm today so they had a few hours up on them. One cable combination had nothing plugged in to it since installation this morning, this evening when I had finished doing some other work I decided to have a sit down and listen and differences from what I knew the system sounded like prior to the cable changes were obvious straight away. Then I decided to plug the Lin Klimax which I'm using as the front in this system at the moment in to the cable combination that had nothing run through it since installation this morning and bugger me it sounded very ordinary, in fact it made the Linn sound brittle and sharp, yes lots of detail but not good. My expectation was this cable would if anything be the gauge that would most suit front ends and and components with a low draw down, so, thus far my expectations have proven incorrect. My guess gven what I heard so far is even in wall power cables need running in, I would be both surprised and disappointed if this particular cable still sounds this ordinary in a few days time, but only time will tell and there will be lots more variations of components and cables to work through and compare before getting close to passing any conclusions. So tomorrow Cafad turns up for a couple of days of listening sessions, plus drinking all of my beer and eating my bloody steaks, lets see how it all sounds tomorrow evening and then again on Sunday morning before he heads home. As I said still early days but given there are obvious differences already, even if they are not all that good just yet, it was still worth a mention. This little comparo I reckon could end up being quite interesting and is already kind of proving itself worth doing so far cheers, Terry Edited April 4 by GC Hifi 3
Cafad Posted April 4 Posted April 4 8 hours ago, GC Hifi said: So tomorrow Cafad turns up for a couple of days of listening sessions, plus drinking all of my beer and eating my bloody steaks, lets see how it all sounds tomorrow evening and then again on Sunday morning before he heads home. I've only got one night Terry. So it will probably only be most of your beer. I am interested in this "in wall" power cable experiment of yours, it's the best excuse to sit and listen to music while enjoying a beverage that I've heard of in quite a while. Kudos! 3
LogicprObe Posted April 5 Posted April 5 Well, we all know the cross section works like a pipe until it becomes a fuse, so you can only use amps or whatever that require a draw lower than the smallest cable.
Andythiing Posted April 5 Posted April 5 My guess is beer will be the limiting factor in this experiment 2
joz Posted April 5 Posted April 5 Ok if there is a noticeable difference? How long do these power cables need to be? 10cm or say 1.5 meters to make the difference? You know where I’m going don’t you?
GC Hifi Posted April 6 Author Posted April 6 (edited) On 06/04/2025 at 8:44 AM, joz said: Ok if there is a noticeable difference? How long do these power cables need to be? 10cm or say 1.5 meters to make the difference? You know where I’m going don’t you? Joz, yes I know where you are going with this, however at this stage this comparison, while obviously I'm using short power leads between the wall and components, has nothing to do with comparing the leads, their lengths or brands or cost etc. It is purely comparing the various gauges of in wall cables from the meterbox / separte fuses to the wall sockets behind the rack (approx 25 metres) as per the photos and as mentioned above in this case being 6mm commercial (orange sheathing), 4mm domestic and two x 2.5mm domestic cables connected to each other to make 5mm, but reduced to 4mm as supposedly required by Australian standards or something like that. I could and more than likely should write up what all three of us experienced and heard and agreed upon during the various comparisons but my head hurts after to much loud music and the fact that I have turned in to a bit of a sook after having only three beers, being my first beers in over eight months mind you. Young Cafad is definitely a bad influence. I will get around to putting pen to paper, but to go into to much detail and try to use the grey matter at this time would just make me feel even more sooky. cheers, Terry Edited April 8 by GC Hifi 4
Cafad Posted April 6 Posted April 6 There, there Terry. There, there. You go and get your rest big fella, let us know when you're ready to type again. Hey, did you remember to "turn off" that last tweak we tried? 3
GC Hifi Posted April 6 Author Posted April 6 13 hours ago, Andythiing said: My guess is beer will be the limiting factor in this experiment It definitely is for me today. ... 1 1
GC Hifi Posted April 6 Author Posted April 6 (edited) 27 minutes ago, Cafad said: There, there Terry. There, there. You go and get your rest big fella, let us know when you're ready to type again. Hey, did you remember to "turn off" that last tweak we tried? Not yet and as you have stuck your head up above the parapet on this one don't feel like you have to wait for me, so feel free to pass on your observations. ... cheers, Terry Edited April 6 by GC Hifi 1
Administrator StereoNET Posted April 6 Administrator Posted April 6 Good on you for not being afraid to try new things Terry. We can read on forums etc forever, but to listen and hear things with one's own ears is ultimately the only way. 6
GC Hifi Posted April 8 Author Posted April 8 (edited) First up I think I need to state the obvious, I stand to make nothing from doing this, its not something I can sell. I am just sharing my experiences. Why did I go down this path? I wanted to know if different gauges of power cable from the power box to the wall made a difference / improvement to how a system sounds and what it does do is allow me to demo to people, who often come here for a whole day and sometimes overnight how different set ups with different power cabling in my place may make a big difference and or sound in theirs. I am also aware that many people will not believe or will outright dismiss what I and others have experienced in all of this and that is fine by me, if you are one of those who scoffs at this please feel free to go and read something else or better still message me make a time and come around and hear for yourself. Moving on. .... Ok, early days still and we only got to try a small number of combinations of different in wall gauge cables with different types of components in the time we had. Still it was very interesting, some what frustrating but also quite informative, but if anything it just showed there is a lot more to learn. Add to that the in wall power cables are brand new so time will tell if they stay sounding the same or not, I suspect not. This is a brief write up and I'm looking forward to Jeff's (Cafad) and or Bruce's (BAM) comments as well if they decide to write up their observations as well. I will briefly go through what I heard when I first plugged everything in prior to my visitors arriving. What is in the system in the listening room: Waversa SmartHub 3 Switch (powered charging to internal batteries) Waversa Reference+ passive Ethernet filter Linn Klimax ( Hub, Server, Streamer, DAC, Pre) JL F1-10 Subs ATC SCM150 Active speakers Power points: six x 6mm 8 x 5mm 3 x 4mm Friday, I initially plugged everything into the 5mm once the system was updated (2x 2.5mm cables); How did it sound? ... best described as dopey and uninspiring, completely changed from the dynamic and balanced and stunning sound the system delivered with two separate 2.5mm power feeds, with one 2.5mm powering the active speakers and the other the front end and Sub's. After a short period of time I switched the speakers to the 6mm, man did that change things, the whole system came alive, the sound became room filling, huge in fact, but not near the SQ level it was with the two separate 2.5mm feeds. However I decided to keep one constant through out this stage of comparing and leave the speakers in the 6mm feed. otherwise to many variables. I then tried the Linn in the 4mm feed, which I expected would be a sweet spot for front ends, it wasn't. The 4mm made the system sound brittle, sharp and quite ordinary. However in all fairness that cable had zero time on it. So back to the 5mm for the Linn. By the evening things were settling down, the SQ had improved considerably, but still not to the same sq level as the original two separate 2.5mm cables. Now my systems always sound better at night, as soon as there is no solar in the power chain then there is almost always a good 10% SQ improvement, so how much of this improvement was the cables settling and or the lack of solar or a combination? At nights end I plugged one of the subs into the 4mm so it could get some hours up on it. I didn't listen at this stage, off to bed. Saturday: Next morning I got up, nothing had been turned off, as it still hasn't been even now, and had a listen, again better but if anything only marginally. Jeff turned up, so we had a listen, again with the 6mm powering the speakers (the constant) which again filled the room with a huge sound, still it wasn't that good and Jeff passed comment, so I thought what had changed from the previous night so I jumped up and moved the R/H side subs power plug back to the 5mm from the 4mm. Instant improvement, much better, now quite balanced and less harshness especially through the top end. Who would have though one Sub's power could make such a difference? So after a little while I decided to plug the Lin in to the 6mm, again instant change, the huge wall of sound got even bigger again but lost all passion and decay. Yuk! ... so back to 5mm and the sq again improved, even though the active speakers stayed powered by the 6mm from the second listening session on the previous day it had still sounded some what dopey from the mids up with the 5mm feeding the Linn, this with time has greatly improved. There are a number of relatively inexpensive things and tweaks one can do to improve power and this is one of them. We did throw in this wild card later (in pics below) on the day by the time Bruce had arrived, I have used and sold for some months a very interesting tweak that Les Davis makes that passively plugs into power points, it has plastic prongs so no conductivity, having said that it only works when the power point is turned on. The difference it makes on most systems is quite remarkable and even with these different sized cables again they greatly improve sq, well worth the small investment they cost and possibly the best tweak for dollar I have tried to date. Anyway I used up to six of these across the various three gauges at any one time. Personally I couldn't imagine listening to a system without them, that is how good they are to my ears. Having said that I have tried them in systems where the owners have spent very large amount on treating their power and on those systems they didn't make a difference, but we are talking systems with many tens of thousands in power upgrades. But for normal systems then yes in my experience they work, better with two than one though. The real limiting factor for many is a lack of power points, so for some these will never be an option unless they invest in more power points or a decent power board with enough spare points. Anyway, in part, getting back to it with swapping these in and out it made a significant improvement in SQ and one that was heading back towards the original sound quality but with the increased vibrancy and wall of sound that the commercial 6mm power cable delivered to amps. One of the things this exercise has proven to me though from trying a couple of other things is how incredibly important earthing is and that is what I will next be improving on. I will not go into it right now but I will write up update with what changes I make going forward with that as it takes place. One other combination we try with the 6mm cables to the speaker amps, was the front end through the 5mm and the two subs through the 4mm. This combination with some genres of music, especially female vocals and instruments was so very good, seriously impressive with lots of decay and three dimensionality, yet still this huge wall of sound. When we changed the music to something more dynamic and lively, more Rockish, with reasonably heavy bass and again the whole sound goes down hill with a added harshness and sometimes thinness, quite bizarre. The sound being delivered has kept changing since Friday and again my bet is it will for sometime to come. How much? Don't know I'll keep reporting in as time and hours move on. Its not unusual to have voicing more forward and or the voicing a little bit back and the music / instruments forefront, the trick obviously is to try and get a balance between the two, what I have found is having the amps in the 6mm and the front end in the 5mm there is great balance and to my liking both are forward, this would not be to everyone's liking, but personally in this system it is mine. One thing I will say is I have never heard ATC active 150's sound like they do now, big punchy, fast and quite dynamic, again that might not be to everyones liking. Am I impressed so far? yes and no but not 100% at this stage, some aspects of the sound delivery is seriously impressive and much better than before and others aren't, but again lets see where this is in another week or two and especially when the ATC's are not plugged into the 6mm, who knows!. Plus this is only one system, different components needless to say will react differently, still a very long way to go on this journey. But imagine if in time once this cabling settles down if this system sounds best with, say, the main amps powered by the 6mm cable, Front end by 4mm and Subs by 5mm. I have not covered every single change or comparison we made as this is now way to long already, but its a good first step on this journey. cheers, Terry Below are pictures of some of the interesting tweaks the Les Davis makes, yes I sell them but so do many others and for a few dollars my bet is you will get a very pleasant surprise in how they improve your system, if anything trying his passive wall plugs kind of sent me down this path as I wondered if they can make such an improvement then I thought imagine what can be achieved with different sized cables. ... lol. Below is a Les Davis IEC Field Marshal, which is a cover that fits over a C15 plug, I use these on most power leads with good effect, even ones costing several thousands of dollars. Edited April 8 by GC Hifi 4 5
Cafad Posted April 8 Posted April 8 (edited) OK, sandbags filled and no snipers in sight. Let's give this a go. I didn't take any notes this weekend and I don't remember many of the specifics so I'm just going to stick with what I do remember. Changing the power points the Klimax was plugged into did indeed change the sound, and I sort of expected this (and was actually hoping I would be able to hear something, though I was not prepared for said hearing of something to be so easy). What I did not expect, and still have some trouble wrapping my head around, was the change in the mids that was caused by simply plugging the subs into a different power line. What the hell? How does that work? The newer cables, both 6mm and 4mm both sounded a bit bright, they both contained some degree of glare and the vocals were hard-ish, though I will say that they did not sound exactly the same, the 4mm did sound different to the 6mm. I was initially quite impressed by the results Terry has had from adding the 2, 10 inch subs to his room, he initially played a drum track that was pretty damn awesome! Before we got into all that serious stuff. I liked them (the subs I mean) much more than I thought I would. Although I thought the larger subs in the front room sometimes overpowered the Fynes they were paired with, that combo was a bit much for my tastes. I think the smaller subs would be a better match for the Fynes (but then Terry did tell me that the larger subs didn't fit in the main room so he was working with what he had). Next time I'm down, (and I'm sure I'll be back, Terry can't drink all that beer by himself) I'll take my laptop and make notes as I go (and probably post them as I go too, and add pics, the whole nine yards kind of thing) that way I still won't remember everything that we did but that won't matter because I can look it up later. Have you succumbed to temptation and moved the ATCs on to another power line yet Terry? I know the anticipation must be killing you. Edited April 8 by Cafad 3 1
GC Hifi Posted April 8 Author Posted April 8 (edited) 12 hours ago, Cafad said: OK, sandbags filled and no snipers in sight. Let's give this a go. I didn't take any notes this weekend and I don't remember many of the specifics so I'm just going to stick with what I do remember. Changing the power points the Klimax was plugged into did indeed change the sound, and I sort of expected this (and was actually hoping I would be able to hear something, though I was not prepared for said hearing of something would be so easy). What I did not expect, and still have some trouble wrapping my head around, was the change in the mids that was caused by simply plugging the subs into a different power line. What the hell? How does that work? The newer cables, both 6mm and 4mm both sounded a bit bright, they both contained some degree of glare and the vocals were hard-ish, though I will say that they did not sound exactly the same, the 4mm did sound different to the 6mm. I was initially quite impressed by the results Terry has had from adding the 2, 10 inch subs to his room, he initially played a drum track that was pretty damn awesome! Before we got into all that serious stuff. I liked them (the subs I mean) much more than I thought I would. Although I thought the larger subs in the front room sometimes overpowered the Fynes they were paired with, that combo was a bit much for my tastes. I think the smaller subs would be a better match for the Fynes (but then Terry did tell me that the larger subs didn't fit in the main room so he was working with what he had). Next time I'm down, (and I'm sure I'll be back, Terry can't drink all that beer by himself) I'll take my laptop and make notes as I go (and probably post them as I go too, and add pics, the whole nine yards kind of thing) that way I still won't remember everything that we did but that won't matter because I can look it up later. Have you succumbed to temptation and moved the ATCs on to another power line yet Terry? I know the anticipation must be killing you. No Jeff as of yet I have not plugged the ATC's into either the 5mm or 4mm but will do by the weekend, that and several other combinations as well. I have plugged both subs in to the 4mm and will leave everything running for several more days to see if there is any further change by weeks end. And yes with the Linn front end and active ATC's both plugged in the 6mm that was a bit to much, again having different components on different sized cable made quite interesting differences to say the least and allowed for changes in the sonic delivery from the Mids, Bass and top end, who would have thought? Again only time will tell if these new cables settle/ calm down or not. It does make me wonder why the 4mm leans toward the brightest and harshest of all three sizes. cheers, Terry Edited April 8 by GC Hifi 3
joz Posted April 9 Posted April 9 With the different gauges how have you gone with the lack of flexibility? Also I’m not sure if if the new cables are only within the walls or also being used as power leads?
GC Hifi Posted April 9 Author Posted April 9 (edited) 1 hour ago, joz said: With the different gauges how have you gone with the lack of flexibility? Also I’m not sure if if the new cables are only within the walls or also being used as power leads? Hi Joz, if you go back and look at the pictures in my first post on this then you can see all of the different gauge cables in the wall and how each of them bridge to each power point, so no real issues with flexibility. Regarding leads from the wall to the components I am using various after market leads that I used to the same components before installing the different gauges. Where possible I like to keep constants so I have a better idea of how each change affects the sound and where possible I only change one thing at a time. cheers, Terry Edited April 9 by GC Hifi 3 1
Kirby66 Posted April 9 Posted April 9 To go to such lengths for an experiment, and to do it openly with 'progress reports' is no small undertaking ... thank you I guess that I expected there would likely be some differences, power cables and 'conditioner / regenerator / distributor' devices have made obvious changes in my system and the earlier in the chain they are the bigger difference they seem to make, so implementing a change from the fuse box to the wall plug makes sense. I found it surprising to read that initially different devices were better or worse with different thickness cable ... but the more I think on that it does sound sensible that a thicker cable would better suit power hungry applications ... not so logical is that source devices don't seem to like the thicker cable, surely they would just use what they need from the available supply Hhhmmmm It will also be very interesting whether different 'brand' components react the same way ... ie: does an Oladra react the same way as a Klimax ... does a separate power amp driving passive speakers react the same way as the amps in the ATC's ??? I sort of really hope they do as this would provide a consistent base line if one was to consider using different cabling in their system. Really looking forward to hearing what your observations are when the new cabling has settled. If it behaves like interconnects and speaker cable it may change significantly ... or subtly. KUDOS to you Terry ... plenty of people have dedicated rooms and circuits so regardless of the outcome this is a valuable exercise for people who are in that deep. 2
Kirby66 Posted April 9 Posted April 9 On 08/04/2025 at 7:52 PM, Cafad said: OK, sandbags filled and no snipers in sight They wouldn't be much of a sniper if you could see them Jeff ... they're out there 2
GC Hifi Posted April 9 Author Posted April 9 2 hours ago, Kirby66 said: To go to such lengths for an experiment, and to do it openly with 'progress reports' is no small undertaking ... thank you I guess that I expected there would likely be some differences, power cables and 'conditioner / regenerator / distributor' devices have made obvious changes in my system and the earlier in the chain they are the bigger difference they seem to make, so implementing a change from the fuse box to the wall plug makes sense. I found it surprising to read that initially different devices were better or worse with different thickness cable ... but the more I think on that it does sound sensible that a thicker cable would better suit power hungry applications ... not so logical is that source devices don't seem to like the thicker cable, surely they would just use what they need from the available supply Hhhmmmm It will also be very interesting whether different 'brand' components react the same way ... ie: does an Oladra react the same way as a Klimax ... does a separate power amp driving passive speakers react the same way as the amps in the ATC's ??? I sort of really hope they do as this would provide a consistent base line if one was to consider using different cabling in their system. Really looking forward to hearing what your observations are when the new cabling has settled. If it behaves like interconnects and speaker cable it may change significantly ... or subtly. KUDOS to you Terry ... plenty of people have dedicated rooms and circuits so regardless of the outcome this is a valuable exercise for people who are in that deep. Thank you Mark, I agree once I start plugging in other components the differences we are hearing now might or might not be as significant. Though I'm still struggling to understand why the different sized cabling makes such a difference, especially the 4mm, early yesterday I plugged the two subs back into the 4mm and left them running all day, last night turned the system up for a listen and again it all sounded very ordinary, so plugged them back into the 5mm and straight away it sounded good. Very bizarre. cheers, Terry 1
GC Hifi Posted April 9 Author Posted April 9 (edited) On 10/04/2025 at 6:38 AM, Kirby66 said: They wouldn't be much of a sniper if you could see them Jeff ... they're out there Re snipers and Jeff making a joke about the need to stand behind sandbags before commenting, in all seriousness I'm happy for there to be discussion and questions asked as well as peoples thoughts on why we are hearing these differences, in fact I invite it. This is to much of an important topic given what we have experienced so far for it not to be discussed in my opinion. I know quite a few people who have had new cabling run to their listening rooms, usually 6mm. But if one only has one size, which is to be expected, then why would anyone know that there are differences in sound quality and delivery based on the different sizes and what size might be best for them. The main frustrating thing here for me at this stage is there are so many other cabling options and while I have three, chances are even that is to limiting. Oh well we might have to have a number of other sizes sitting in the wall going forward as well. ... *** Edited .... while I said I'm happy for there to be discussions on this topic here I do know this is a topic that people may feel strongly about, so I ask that everyone please keep in mind this commercial page has the same rules as everywhere else on the forum when it comes to discussions getting out of hand, so please all I ask is keep it civil and polite. I will be the first one to ask for the discussion to be closed if the basic rules of the forum aren't followed, which would be a shame for such an important topic that I believe deserves a discussion, especially as I share my ongoing experiences with everyone. cheers, Terry Edited April 11 by GC Hifi To clarify that the rules apply even in a commercial section regarding keeping the discussion civil and polite. 1
acg Posted April 10 Posted April 10 (edited) @GC HifiTerry, prior to running new mains power cable to my room I was able to measure the inducted voltage within the existing line. From the mains box into the house runs a thick wad of power cables probably 20cm to 30cm in diameter. Only one of those cables went into my room and with nothing plugged into that line I measured a fluctuating but general 16 volts inducted from the power transmission of the other wires coming into the house (running fridges, freezers lights etc.). So, when running the brand new 6mm2 wires into my room I found a different path into the house that avoided that wad of cables and then maintained large separation distances to other power wires through the ceiling and into the room. The result is zero inducted voltage on my single dedicated audio power line. Anywhere two separate mains power wires run close enough to each other there will be a voltage inducted from one to the other. This is made worse by running the wires parallel to each other as they generally are within a wall. The longer the distance in parallel the more energy is inducted between them (this is how transformers work). All this may or may not affect the audio components plugged into power sockets in your room depending on robustness of their power supplies...it should not...but...it might. If all your components are plugged into the same mains circuit with no power draw on the remainder then there is no inducted voltage into the audio system other than where that line interacts with other lines into the house (eg. that wad of cables). Once you are drawing power from more than one of those lines in your listening room, and given the intimate way mains wires are routed through most walls and ceilings in most houses, there will be energy transfer between those lines, and this may affect your sound. PS: interesting experiment Terry. I'm following! EDIT: I purposefully only brought one mains circuit into my listening room as I theorised that short distances between component grounds would be a good thing to minimise potential differences between components eg. preamp to amp, sources to preamp etc.. Maybe try all the gear connected to each circuit rather than splitting them across several. Edited April 10 by acg 4
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