I think there is. I have been amp hunting over the last few months. I didn't really need the extra power but I was curious about a different sound. I thought I would start with bass boost, which are mostly just found in portables. First I bought the Topping NX3s. HUGE bang for the buck! Still curious, I bought the FiiO A5. A slight improvement over the Topping, to my ears. Still not really what I was looking for.
I came across a dealer selling Burson Fun amps with upgraded opamps for half price and I jumped on it.
I am now the very proud and very happy owner of a Burson Fun-Classic. It has improved all of my headphones from a sound perspective. Again, I don't listen super loud, but they have really brought the best out in all my headphones.
If you need an amp for out and about, the Topping or the FiiO will fill that purpose very nicely. For me, when I am on the run, I just use my LG V30 phone and Meze 99 Classic's. Great sound and more power than I will ever need.
Shane D