Sennheiser HD 660S2 Open Hi-Fi Headphones Introduced

Miguel Palispis

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Sennheiser has just unveiled its latest open Hi-Fi headphones - Sennheiser HD 660S2 which is the follow-up to the popular audiophile HD660S headphones and offers improved audio resolution and a much beefy bass. Sennheiser HD 660S2 details First off, The HD 660S2 promises a significant crisper bass compared ...