7 watts of power at 32 ohms, anyone?
The Cayin iHA-6 is absurdly powerful and I am afraid to plug any IEM barring Final E5000 (93dB/mW sensitivity) because of how powerful it is from the balanced out.
The build quality and overall fit and finish belies the price-tag. Frankly, from the feel and design alone I'd assume it to be a $1000+ amp. Fortunately it's quite a bit lower than that and still in the "somewhat affordable" range. The biggest issue for me is the weight of these which makes these very difficult to reposition let alone carry around (~5kg).
So far only listening with HD650 from the 4-pin XLR out and it has thundering dynamics along with better layering than the Schiit Jotunheim. I'm not a big fan of Topping's artificial-ish signature anyway on most of their amps but I will try and compare against A90 soon. Other than that, can't see another amp in this range that can compete in terms of sheer power against the Cayin iHA-6.