Beat Electronics LLC, the company owned by super producer Dr. Dre that produces his signature headphone line, is being summoned to court by rival headphone maker, Signeo USA.

The lawsuit was filed June 2 in the United States District Court for the Northern District of California.

Details are scarce but the suit also names Monster Cable as a defendant in the case.

Signeo USA is the manufacturer of the Soul headphone line marketed by Ludacris.

As previously reported, Ludacris' Soul headphones stand behind the principle that you should "experience that feeling with each listen."

Artists such as Anthony Hamilton, Estelle, and Grammy-winning rapper, Atlanta's Ludacris, were on hand to give respect to soul music titan Otis Redding.

Estelle sang Redding's classic, “Satisfaction,” a Rolling Stones original that became one of Redding's trademark songs.

Children Dexter and Otis III were on hand to perform with Anthony Hamilton.

Ludacris was honored by the Big “O” Youth Educational Foundation, a charitable foundation founded in remembrance of Redding's legacy, for his numerous charitable works.

“I'm just a fan of Otis Redding,” said the rapper. “His legacy will live forever and he has been one of the major influences in who I am. It's as simple as that.”