Todd - regarding the Harmony connectors...
I have tried all of the connectors on both analogue and digital versions of my Helix cables and here are my observations/opinions...
For digital SPDIF interconnects...
--- I found the Silver Harmony were more than adequate and provided better SQ than the Copper Harmony
--- using either the Pure Harmony or Absolute harmony did not improve SQ in my system
--- having said that - my highest digital resolution is 24/192
For analogue interconnects...
--- I would not bother buying the Copper Harmony because the Silver Harmony are so much better and well worth the additional expense
--- I would also not bother with the Pure Harmony because for the additional expense of the Absolute Harmony they provide much better SQ
I have also tried them all on my TT’s once piece loom and stand by my findings for Analogue IC’s above
Having said that - we all have a budget that constrains us, so pick the very best RCA you can afford for the application it is to address.
When soldering the Harmony RCA’s - plug them into an unused component (if you have one) or get an RCA socket - it helps dissipate the heat so as not to melt the plastic housing and also makes for a much better joint
FYI - the Harmony RCA's take time to settle and burn in also - so give them lots time.
- 1-2 days to settle after connecting OR re-connecting them
- upwards of 100 hours to burn-in - 200 hours yields their best performance
Regarding Speaker cables...
My only stab at DIY was using CS-122 and D-352 bulk cable from Van den Hul, which performed very well and were in my system for a very long time
I did try a couple of models of Kimber Kable, but found the Van den Hul performed better in my system
But just as an FYI...
I later had the opportunity to try KLE Innovations gZero 2, gZero 6 and an older version of one of their newer ZPURITY cable.
- the gZero2 bested my DIY cables significantly
- the gZero6 provided faster dynamics, deeper bass and better image than the gZero2
- The zPurity provided marginal improvements over the gZero 6 in my system - but not enough to warrant my buying them
- I had all of the above cables in my system for 2-3 weeks, which allowed a certain amount of settling and burn-in time
At first glance, I found the KLE Innovations cables skinny, compared to my 10 gauge D352's, which left me wondering how they would compare - it only took one track to hear the vast improvement.
I currently use the gZero 2 on my AV system and gZero 6 on my Audio system and have stopped looking.
I have also tried some other pretty expensive big name brands, but have not found anything that outperform the KLE Innovations products - yet :-)
I have not tried a DIY solution along the lines of the Helix geometry for speaker cables - mainly because making long cables in the Helix style becomes very difficult.
But I’m still pondering a solution :-)
Regards...