I jump started my son on his 16th Birthday.
Dennis Murphy modded Pioneer monitors.
Schiit DAC
Parts Express 10 in sealed sub.
We made a high pass filter with a couple of caps in the cables.
He borrowed an original NAD 3020 from the storage rack in the basement. ( noisy controls)
He got a Sony 2 channel integrated with BT a year later.
He is 28 now and still likes to lay by the sub while cranking tunes.