Yes i have tried AK 240 pair With Cypher Labs Duet :
source : AK 240 use LINE OUT
Amp : Cypher Labs Duet use Low Gain
Headphone : Beyerdynamic T5p stock cable
LCD XC SAA. endorphin balance 4 pin > balance 4 pin to mini plug
Cable : mini to mini Crystal Cabel Dreamline DIY
Music file : WAV ,AIFF , FLAC hi rest 24 bit / 196 KHz and DSD
My impression :
High : very detail and very clear and very good clarity
Mid : very clear and sweet and natural mid that I can hear every clear how the Sanger breath
Very good pronounced and rendering
Bass : very good impact and fast bass reproduction and very clean and detail
Separation : very good separation that for close I can detect very clear the musician placement
Soundstage : wide and very good depth , that I feel not like close headphone
Background : very black background
Hissing : No hiss
Duet is new amp , the SQ is one level above my old school Headroom portable micro amp and pico dac amp
With duet pair with AK 240 has very good synergy , very good rendering , at low Gain I have power full
Amp to drive T5p and LCD XC .
The best synergy pair with LCD XC , with T5p the bass is not so tight ...
Rudi, Thanks for this précise report.
One question: did you used the BALANCED line-out of the AK240 to feed the Duet ?
Also, did you compared SE and BALANCED headphone out of the Duet With the LCD ( or other phones) ? Is there à réal SQ gain going Balanced With this set-up ?