What is the smallest footprint amp 4x50W RMS?

[bozothenutter]

What is the smallest footprint amp 4x50W RMS?

looking to upgrade, but don''t want anything big.

'suppose it'll be class D?

it should be quality stuff to go with my Hertz HSK

 

[Dink]

ktp-445 is 4x45wRMS that plugs into a alpine head unit (can be altered to work with other makes)

 

[bozothenutter]

thanks, but not quite what i'm looking for as the install will go under the seat.