dCS + headphones
I have my K1000 plugged into the 6vrms XLR outputs of dCS Elgar Plus DAC, I compared my tweaked K1000 against stock HD590 and got more bass from K1000. Here is how:K1000 tweaks
1meters Nordost Valhalla 16awg Dual Filament cable for headphones.
ERS Paper around headphone cable.
Warm-up the DAC for a couple weeks. 1-2 days is minimum.
Leave music running 24/7 at normal listening volume. 12 hours minimum.HD590
Stock headphone cable.
Put DAC in stand-by and turned on again (DAC went cold).
Drivers not used for a couple weeks.
Tweaks make a bigger difference in bass than K1000 vs HD590.
BTW. I have come to realize that all headphones between Sennheiser HD590 (easy to drive) and AKG K1000 (hard to drive) sound best when plugged into the RCA or XLR outputs of Elgar Plus. With K1000 I just use the rear switch of Elgar Plus to switch from 2 to 6vrms and the edginess transforms into warmth and bassiness with more low-level detail. It is better than all dedicated amps I have tried, as long as it has proper vibration control with Magix levitation feet and 100 lbs of mass damping. It's very
sensitive when using a single box setup...
With HD590 I use -56 volume with 6vrms.
With K1000 I use -39 volume with 6vrms.
The digital volume control inside Elgar Plus goes from -60 to 0. BTW, it's much better than Foobar volume control.
IMO, a dCS DAC is the best source for headphones since the system doesn't need a pre-amp, amp, interconnects and tweaks for them. I just use a modified Dual Filament Nordost Valhalla headphone cable.