Lively Saturday evening Harinama in London (3 min video)
Srila Prabhupada: It is the practice of the brahmanas conversant with the science to pronounce a Vedic mantra in the right accent. But even if the Hare Krishna mantra is not chanted properly, it still has so much potency that the chanter gains the effect. (Srimad-Bhagavatam, 4.13.27 Purport)
Watch it here: https://goo.gl/WvmiUK