Sennheiser Momentum 4 Wireless headphones go big on specs in bid to dethrone Sony - What Hi-Fi?

60-hour battery life and aptX Adaptive Bluetooth head the bill

Sennheiser has officially unveiled its latest premium wireless noise-cancelling over-ear headphones, and those of you who are eagle-eyed may have already seen we have a Momentum 4 Wireless review liv… [+2819 chars]

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