Aren't the Pistons of too low impedance to be driven from the Bravo Audio Ocean? Some were saying it was a good combo a bit earlier in the thread. I've got a 70ohm resistor adapter. Does anyone know I would be better off using that if trying to drive them from the Bravo?
My Nexus 5 has very low gain, so it works well on it. Running a Sylvania tube, but switching to a Genalex Gold Lion later.
A resistor will usually modify the sound signature.