For 575$ you can have your very own Yamamoto HA-02 from Venus Hi-Fi as a end of year special. No I am not associated except for being a happy owner of one.
Here is the link:
End-Of-The-Year Clearance, Part V: Yamamoto Sound Craft HA-02 Headphone Amplifier - AudioKarma.org Discussion Forums
thread with HA-02 discussions:
Yamamoto Headphone Amplifier Group Purchase - StereoNET Australia
Some additional impressions here:
Mini Meet Impressions - SGHeadphones
In terms of amp for the K701, from my various experience I would say this is the order:
1. Single Power Extreme
2. Headamp GS-1 & Yamamoto HA-02 (depends on what kind of sound you like)
3. Heed Canamp
4. Graham Slee Solo Green
However, looking at the overall question, I believe the root of the problem is the source and the headphone. I have went into a lot more details in pm however so I won't repeat it here.
|I was in love with "Graham Slee 'Green' solo" before, but someone offer me a heed with an offer that I can't refuse. So if I buy a "Green" solo, I would think this as a small margin of upgrade, beside I heard Green solo works better with low impedance headphone such as my Denon D2000, and hardly synergies with K701.|