Danny Richie on loudspeaker design.

He takes on a task nobody else wanted and provides legitimate enhancements for a fee. 

And he charges no fee for the design work he puts into the loudspeakers sent him for evaluation, just the parts needed to implement his "fix" should the loudspeaker owner decide to move forward with the upgrade. I'm sure the owner pays shipping both ways, of course.

But remember gentle reader, GR Research offers it's products strictly as DIY kits, not fully assembled and finished products, though Richie has associates who will do the build if you are willing to pay.

Danny definitely pushes for a higher performance level and is good for the consumers.  I think it’s great that he explains in easy to understand terms and educates people. He also exposes the parts quality used in most speakers for what they are ....it’s shocking what some companies will put inside a multi-thousand dollar speaker. It seems the bigger the company, the more pressure there is from above for profit.

Danny’s video was a response to Jay’s Iyagi’s video and clarified or corrected things Jay was saying. I think Danny made it very clear that when people send in a speaker to him, they are doing so because there is something that needs fixing and he is looking for a parts solution and he is not redesigning the speaker. He also clarified an issue Jay had with GR Research’s own products in terms of bass heft.

I’ve found interesting stuff on both Jay’s and Danny’s videos although generally, Jay is reviewing products I’m not that interested in since I tend usually to more boutique stuff where the manufacturer isn’t sending stuff out to YouTube reviewers.

There also is (in Danny’s video) a little gig on the ASR method.

Had a friend send me the dipole bass system and networks etc he couldn't get them to function properly and they were terrible I had to rework all was a few years ago maybe he's gotten better. Best to get info from many sources. Following an audio guru is usually not the best way. Learn enough to understand audio design then you can see that some audio gurus are fairly off base. With all things, YMMV and Danny's business is biased toward his own products like all businesses can't fault the guy for that.