Tech Advisor doesn’t dish out five-star ratings often, but Sony headphones and earbuds are some of the few products to receive this accolade. If you want to get your hands on the best audio products you can buy, now is the time. Several headphones are down to their lowest prices ever, though the discounts will only last until the end of the day and are exclusive to Amazon Prime members. The biggest discount is on the Sony WH-1000XM4 over-the-ear noise-cancelling headphones, which have over 40% off. The discount is the most impressive in the UK, down from £350 to just £179.99. US readers meanwh…