The EE has a push button on the front panel for phase . Just press it in and it turns red. You should not have to reverse speaker cables .
Scratch that . I just reread your post for the EE pre . The dac has the polarity button . So yes just reverse the positive and negative on your speakers .
Scratch that . I just reread your post for the EE pre . The dac has the polarity button . So yes just reverse the positive and negative on your speakers .