Small or large sub for music

Subwoofers are a bad solution for inadequate speakers. They are mutually exclusive with high fidelity because they can never perfectly integrate. Some people and rappers don’t care about sound quality. Low-Fi is fine for them. For the rest of us, subwoofers only belong in the home theatre.

Another clueless statement! Zero understanding of the importance of room interaction.

Many contemporary full-range speakers (very high-end) now have amps built-in to the cabinets - with EQ capabilities - to expressly drive the woofers. This design allows better implementation/integration with room issues.

Using separate subs with stand-mounted monitors or two-way floor standers have the advantage of moving the subs to the optimum location in the room - allowing the system to be full range.

"More important, IMO, is to have a SEALED sub for music."

Can anyone provide a supportable reason for this, or is this just an ad nauseum repeating of inaccurate information?

Yes, it’s a myth. I’ve got two of these ported Talon Roc 2002 monsters for my 2/ch rig in my small/moderate size room. 140 lbs each. After years of owning just one, I was astounded to discover how much I was missing when I added the 2nd. Now, I easily hear rhythm, timbre and texture - way down deep. It’s especially great at low volume listening. No boominess. No one-note thumping. No DSP. It did take a while to integrate them seamlessly.