DIY. Whose speakers would you use?

Think of a loudspeaker as a total design. If you have skills DIY is a possibility if not so gifted and most are not. A kit might be a good idea. If 1st build K.I.S.S.

Not really only answers why you would not want a kit not why it would offer less performance or be engineered to a lesser degree. Most a kit wouldn't even be a option but there are some very well thought out and designed kits available most are not so costly. And many kits are a very easy build. Like SEA X-1 kit from madisound.

Orpheus, What makes you think kits are not as well engineered as Polk or other products?

Fostex RAAL SEAS GOTO ALE GPA BMS Mundorf Eminence Tone Tubby JBL Fatail Pro 18 sound HI-VI Accuton fountek TAD Raven PHY
Lowther