Nobody knows, as far as I'm concerned it might be both. There's no official word from Topping to their customers addressing this issue, or explaining whether it has been sorted with future batches. No input on what batches might be affected, or if future or current batches also might fail. It's a mess.Is it the new or old batch that have issues? I just got the combo from shenzenaudio but I'm only powering meze 109s currently but the thought of spending so much on a possible future lemon is worrying.