My impressions of the AMP2 module:
I received this a few weeks ago as a review sample and while appreciating the abilities of the X7, I was not overwhelmed by the sound. With the AMP1 module it is smooth but lacks some dynamics, transparency and bass control. Knowing what the Sabre chip the X7 uses can do, the sound, which for me with this chip means transparency, dynamics, and a very good soundstage, I felt that more was to come. With the AMP2 module this comes to light.
The sound with the newest module opens up. The transparency, space and air surrounding instruments and voices, becomes more involving. The dynamics improves to a level that for me, I enjoy it even more than the K5 docking station. On the K5, I think it a very capable and great buy so it is not something I would pass by because it offers so many conveniences.
I notice that with the AMP2 module that cymbals have a brassier and longer hang in the air sound and when enjoying jazz this is important to me. Also on well recorded rock, again the cymbal sound is clean and right. With regards to rock there is nice slam with the module and importantly with increased dynamics, as volume increases the sound field does not collapse, which can destroy the enjoyment and illusion of the sound presentation. Layering is better with the AMP2 and in general you gain a more coherent and cohesive sound.
Many of these attributes of course go to the X7, because if it were not capable, then it wouldn’t matter what the AMP2 does but the combination with many headphones and with IEM’s works extremely well.