Q Acoustics from what I can see, don't list the frequency response specs of the BT3. I'm guessing that's because these are multimedia active speakers and are probably aimed at people who don't need to know or don't want to know. Leaving those specs out is not helpful to those who do want to know though and will want to connect a subwoofer and want to know what to set the crossover at, rather than just connect up and say 'that'll do'.
Anyway; they are very similar in size to the 2010i with the same size woofers, so I imagine the response will be similar. 2010i are rated at going down to 68Hz.
As above, it's trial and error as set ups vary, and the room acoustics will play a part. Try around 80-90Hz on the crossover and play it by ear, adjusting it until you find what sounds best to you.
Anyway; they are very similar in size to the 2010i with the same size woofers, so I imagine the response will be similar. 2010i are rated at going down to 68Hz.
As above, it's trial and error as set ups vary, and the room acoustics will play a part. Try around 80-90Hz on the crossover and play it by ear, adjusting it until you find what sounds best to you.
