I use my TT2 as a headphone DAC/amp. This is the original purpose by design. Driving speakers out of BA from TT2 is sort of an extra function. I am playing with the thought of buying efficient speakers one day and drive them from my TT2, but my life circumstances are not quite ready for that yet. Anyway, TT2 is not for driving speakers directly by default. TT2 can do that because it is an absolutely outstanding headphone DAC/amp. If one day I decide to push the TT2 to its limits and drive speakers out of the BA at the back, I will really make sure those speakers are efficient and will sound great without making the TT2 too hot. This might mean, perhaps I can't buy the best of the best speakers just a 'good enough' pair, but those speakers will be driven from a TOTL headphone amplifier... Which is pretty cool (and cost efficient).