I purchased the 1.5 m dual TRS to Senn 6xx for Balanced output from Pono. I've purchased Cardas A8 ear monitors a few years ago. One common design issue is on the TRS end it does tend to fray easily. The new pair for the Senn's appears to be similar design. I suggest very delicate handling to ensure the connector ends are not twisted.
The Pono did not have to use as much power to drive the Senn's. I was impressed with the sound but can't say if it's better than my first Balanced set. It just takes less power with the Cardas cable.
The second set purchased is Senn 6xx to Schiit Jotunheim headphone Balanced output. I purchased the 4.5m option with the Neutric 4 Pin male connector. Very well made set of cables. Flexible and long enough to easily move around my listening space. Again a notable less amount of power required to drive the Senn's. I am using the low gain setting on the Jotunheim and the audio is clear for all instruments, background vocals and the lead singers.
These are worthwhile purchases. Highly recommended!
The Pono did not have to use as much power to drive the Senn's. I was impressed with the sound but can't say if it's better than my first Balanced set. It just takes less power with the Cardas cable.
The second set purchased is Senn 6xx to Schiit Jotunheim headphone Balanced output. I purchased the 4.5m option with the Neutric 4 Pin male connector. Very well made set of cables. Flexible and long enough to easily move around my listening space. Again a notable less amount of power required to drive the Senn's. I am using the low gain setting on the Jotunheim and the audio is clear for all instruments, background vocals and the lead singers.
These are worthwhile purchases. Highly recommended!