Offering them separately at least allows you (in any case, me) to purchase them separately. I purchased the L70 first and connected it to my DX3P+ (DAC mode).
It works well with the DX3, the bass is accurate and punchy, and the treble air is a bit more present. It was a mystery to me when I first used this more powerful amp why the volume setting was what the DX3 was set at, that is, until I looked up the specs and its SE power output is pretty much at the same level as the DX3. I’m still good because I really intend to use its balanced output with a pair of Fostex T60 Argons, which won’t be on my head for another 2 weeks… cannot wait!
Some time this spring give me 3mo to figure out the audible difference between the E70 and the Velvet, and if the latter is worth the extra $100…
Edit… grammar…