A hack noisemaker, possibly - or several! (7,8)

I believe the answer is:

karaoke machines

'several' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'a hack noisemaker possibly' is the wordplay.
'possibly' indicates an anagram.
'a'+'hack'+'noisemaker'='ahacknoisemaker'
'ahacknoisemaker' anagrammed gives 'KARAOKE MACHINES'.

'or' is the link.

I've seen this clue in The Independent.

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