Apple remains Wall Street's tech industry lion, with analyst firm Goldman Sachs yesterday doubling its iPod shuffle sales estimates.

Now predicting 1.8 million iPod shuffle sales in the March quarter alone, the brokers raised estimates, saying: "With competition unlikely to come from 'me too' MP3 players, it will probably take something like Sony's PlayStation portable to pose a challenge to iPod long term."

Apple's first-quarter earnings report declared the company shipped 4.58 million iPods - a 525 per cent increase in iPod shipments, year-on-year.

Global MP3 player shipments are expected to reach 35 - 45 million units this year.