AudioQuest Quartz III - £130 ($200) for 50cm
Oops thats like 43.333333... %
You might be amused by the costs and % of my tuner and its interconnect.
Interconnect is 50000% of the cost of the source! Must be a record surely?
I got the Pioneer F7 tuner as part of a package at a car boot sale for £5 with an amp, deck and Monitor Audio MA14 speakers; I only wanted the speakers. So I apportion a cost of £1 to the tuner; in fact it turned out to be pretty decent.
After a cable upgrade in my system, I ended up with a spare Argento Serenity. I tried this on the tuner instead of DIY Belden 89259 before selling the Serenity; well the result was WOW and I'm keeping this interconnect here.
The Serenity cost £500 used, hence the 50,000% figure. All logic says it's totally ridiculous - but my ears tell me otherwise! :-)
On a serious note, my interconnects are all Argento and I love them; expensive, but very much worth it IMO.
Source - 4000Dac + 1000 USB/Spdif
Interconnect: 4000, but it will be soon replaced by a 400 one (for the time being).
Interconnects are tricky - the more expensive they are, the more distinct the changes they bring to the system, and it is more difficult to find a good match.
High-end interconnect really does have a transformative impact on the system: try a higher model of Nordost or Tara Labs (opposite sound poles) and you will know what I'm talking about.
Obviously cable pricing is ridiculous, but so far I have not heard anything diy that would be on par with top commercial products.