Have you ever wondered why speaker manufactures do not consign speakers to dealers?

I don't think it's a manufacturer's job to offer consignments. It's the dealer's job to provide demos. If he can't demo what interests you, then I think you are in the wrong dealer.

In today's world, consignment would create too many satellite in-home dealers who weren't exactly serious about selling.  I am a dealer and operate out of my home, but I have also invested heavily in product and am committed to seeing returns on those investments.  This buy-in is a commitment to the manufacturers and distributors that is very much needed.

Decades ago this wasn't as much of an issue as in home dealers weren't really a thing.  Manufacturers would consign some gear knowing that the dealer would move some.  To go with that, gear also wasn't as absurdly priced as it is today and there was a larger market segment willing to pay for quality.

I've had several clients who trade gear religiously tell me they thought seriously about being a dealer without ever realizing you have to pay to play.  It's amazing how quickly their tune changes when they look around at my stock and realize I've had to invest in every piece.