iBasso has a "trusted" one as well. The only reason I use the word trusted is because you can actually get these from a lot of Chinese sources, but you are taking a chance that they have wired them correctly, and not just re-labeled a standard adapter (because there are also 3.5mm balanced connections that can use these standard adapters). One has to be very careful when buying this type of adapter.
From an electrical standpoint you can look at it this way: The single ended (here forth known as SE) circuit has only 3 wires. You have the left hot wire, right hot wire, and the 2 grounds that are tied together. The ground is the important part here when trying to figure out if you can plug a differing setup into the amplifier/DAP/source. in an amplifier that has any SE connection (typically 3.5mm) the two grounds are tied together.
In a balanced connection you have 4 wires (as opposed to 3 in the SE); left hot wire, right hot wire, ground for left, and ground for right, and they are all separated in the amplifier circuit. An added benefit of having this setup is that you eliminate any crosstalk you might have in a SE connection. So in your amplifier circuit, if you go from balanced connection out to a SE cable or head gear, you are shorting out the ground wires. Since each transducer only has 2 wires, there is no dedicated ground (a positive and negative, and a true ground), and that means that the ground is considered "hot" as well (having electrical potential). So with this setup it would be like taking something like a "household" extension cord that only has 2 wires (not the commercial one that has an extra/true ground) and cutting off the outgoing end (leaving the wall plugin alone), stripping the wires, and touching the red and black together. Though it would be a lesser effect in a sound circuit, it is essentially the same thing that you are doing here.
Since the SE circuit in the amplifier is already set up to have the grounds shorted, it doesn't harm it, but in balanced they are wired internally to be separated and will cause harm to the amplifier if those circuits are shorted by using a SE cable or adapter.