The Hare Krishna Mahamantra is performed by prolific kirtaniya Yamuna Devi Dasi.  Yamuna devi dasi performed vocals on the 1969 Apple Records Hare Krishna Mahamantra track from the Radha Krishna Temple Album produced by Sriman George Hasrrison.  Yamuna Devi Dasi later performed as one half of the bhajan group Rasa.
The sixteen sound syllables of the Mahamantra follow...

HARE KRISHNA MAHAMANTRA

Hare Krishna 
Hare Krishna
Krishna Krishna
Hare Hare
Hare Rama
Hare Rama
Rama Rama
Hare Hare

Srila Prabhupada says:

Rama and Krishna are names of God, and Hare is the energy of God. So when we chant the maha-mantra, we address God together with His energy. This energy is of two kinds, the spiritual and the material. At present we are in the clutches of the material energy. Therefore we pray to Krishna that He may kindly deliver us from the service of the material energy and accept us into the service of the spiritual energy. That is our whole philosophy. Hare Krishna means, "O energy of God, O God [Krishna], please engage me in Your service." It is our nature to render service. Somehow or other we have come to the service of material things, but when this service is transformed into the service of the spiritual energy, then our life is perfect.

24 Hour Kirtan in New Vrindavan 2007

Hare Krishna Mahamantra ~ Yamuna Devi Dasi:

We are an independent Gaudiya Vaisnava channel dedicated to propagating Krsna Consciousness as directed by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada.

Hare Krishna Mahamantra ~ Yamuna Devi Dasi:

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