Well, I am thinking about getting the iFi iCAN headphone amp to pair with the Herus.
Does anyone know where to get a good breakout cable to split from the 1/4 inch to two RCA jacks that is neither the cheapest, flimsy type of thing you might get at Wal-mart nor an 'audiophile' grade cable costing hundreds of dollars?
If anyone also has any input on the headphone amp itself, that commentary is also welcome.
Reason for wanting a separate amp is that in my comparison between the Herus and the iFi iDSD NANO, I noticed that Herus does everything better except bass. The iFi just does it that much better, so I am hoping to correct this with a separate amp, and the bass option on the iFi headphone amp has gotten a lot of positive feedback.
One cable possibility is a Double Helix Cables model called the Single Strand.
http://www.doublehelixcables.com/store/index.php?main_page=product_info&cPath=3&products_id=13
The typical termination uses a DHC 3.5mm stereo plug to 2 Neutrik RCAs, however they will let you specify a 1/4" stereo plug in place of the 3.5mm plug, it's not on their web store drop down order form but you can just email them after placing the order as 3.5mm and confirm your need for a 1/4" plug instead.
Not in the category of "cheap", but at $99 certainly not expensive given the high quality of the wire/conductors, plugs, and overall construction. If you are willing to drop a little more coin, you can further customize this cable with different RCAs, or even various cosmetic touches involving the sleeving too.
Another slightly less expensive option is the CEntrance Reserve Series, somewhat longer in length than the DHC is at 5', listed for $75.
http://www.bhphotovideo.com/c/product/878951-REG/CEntrance_Inc_reserve_series_1_4_1_4_TRS_to_Stereo.html
I can personally vouch for the sound and build quality of the DHC Single Strand, I own one, but I have never used the CEntrance Reserve Series cables despite being an owner of their superb HiFi-M8 DAC/headphone amp.
In either case be prepared to wait a little, DHC has about a 6-8 week back order, while CEntrance is 1-2 weeks.