The Grell TWS/1 'in-ear headphones' are the debut product from the eponymous company headed by renowned audiophile headphone designer and engineer Alex Grell.

While the company may be a new name to many, Grell himself is a long established, highly regarded operator in the headphone world, having previously been the lead designer at Sennheiser. Whilst there, he helped tune and perfect some of the finest headphones ever made, including such models as the current flagship HD800S (that's a £1,400 pair of cans to you, mate).

Having also worked with Swedish lifestyle audio brand Urbanista, Grell recently left Sennheiser to start his own brand, Grell Audio. Taking everything he learned from three decades in pursuit of sonic excellence, his new company's first fruit - the TWS/1, reviewed here - has been designed to the same exacting high standards. World-class sound, with clarity, transparency and detail, includes attention to detail at every stage...