Fowler replaces Andy Clough, who has been promoted to a senior executive position at sister publication Classic FM after five years on the Haymarket hi-fi title.
Fowler starts next week, leading an editorial team of 13 and reporting to What Hi-Fi? group editor Mark Payton.
The move comes as the number of magazines serving the sector explodes, following the massive take-up of DVD and home cinema in the UK. Main rivals include Home Entertainment and Hi-Fi Choice.
In July 2001 the magazine changed its name from What Hi-Fi? to What Hi-Fi? Sound and Vision to reflect the changing market.
Payton said: 'The market has become much more consumer oriented, and, while facing increased competition from other publishers, we have aggressive plans to ensure we remain the UK's leading home cinema and hi-fi magazine.'