Court judge upset supporting deputy speaker (9)

'speaker' is the definition.
(type of speaker)

'court judge upset supporting deputy' is the wordplay.
'court' becomes 'woo' (both can mean to romance someone).
'judge' becomes 'ref'.
'upset' shows that the letters should be reversed in order.
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'deputy' becomes 'sub'.
'ref' in reverse letter order is 'fer'.
'woo'+'fer'='woofer'
'woofer' after 'sub' is 'SUBWOOFER'.