Wow, some of you guys are getting a little carried away here. Allow me (the presenter) to make some clarifications.
Some of the comments have a ridiculous nature, but I will respond anyway.
I find it odd too that three speakers were shown and weren't candidates for upgrades for different reasons, but everyone seems to focus only on the Harbeth.
First of all, regarding measuring with grills on or off. They were measured both ways and presented both ways. Which way they measured best was not relevant. They measured well and it was so stated. The measurements also have nothing to do with why that speaker was not a good candidate for improvements or an upgrade.
When a speaker measures well I typically don't elect to redesign the crossover for it. If parts quality is poor (like in this case) it is often a good choice to simply make upgrades in those areas, and despite what some people think, significant improvements can often be made in clarity, detail levels, resolution, imaging, etc by removing bottlenecks and allowing for a cleaner and less smeared signal to reach the drivers. Unfortunately, due to the complexity of the crossover, there is no way to replace those same parts with higher quality alternatives and still fit it all in that same space. Just some simple 16 gauge air core inductors would be hard to squeeze into that space.
On bloomy cabinets. It is well known that many of the British speaker companies use a lossy box to add a bloomy coloration to the sound. Some of you seem to think it was a sin for me to mention or acknowledge that. It's not. It is common knowledge that some cabinets are designed that way. The cabinet resonances don't show up in a spectral decay either. To really see them requires an accelerometer test on the side of the panels. You can see that issue in a measurements of some Harbeth speakers taken by John Adkinson of Stereophile.
https://www.stereophile.com/images/318harbeth.H302fig2.jpgIt is not too bad on the small speaker that I tested but it gets worst on the larger models.
Here is another one:
https://www.stereophile.com/images/615HLS5fig2.jpgSo again, the lossy cabinet issue is WELL documented.
What is also really funny here is how bent out of shape people can get if they don't like the message.
"Multiple claims are made in the video without evidence presented"
Actually everything I said and every measurement posted was absolutely 100% exactly what I said it to be. The measurements are purely objective and speak for themselves. Actually looking at and showing what is inside is as true as it gets. All is there for all to see. I am not the designer or company that made the choices to use the least expensive budget level parts they can find. If you have a problem with that then take it up with Harbeth. Don't shoot the messenger.
And cries of an "endless negative marketing campaign" is totally ridiculous. I just report what I find. I praise where praise is due and don't sugar coat anything.
I must also point out that the companies whose products (speakers) are sent in to me are not our competitors. We are in a completely different market segment than all of those companies. We are in and cater to the DIY market. Offering upgrades is something we have been doing for over 20 years. The upgrades are fun for our customers, and are often an inexpensive way to improve the performance of their speakers and allow them to further their music appreciation and listening enjoyment. It also gets a lot of people to try DIY for the first time. So all of these upgrades have brought a LOT of new people into the hobby. That is the real motivating drive force in doing all of this. Those customers are often so happy that they come back to us again and again to try other products or kits that we offer.
Our customer base speaks for what we do (we have thousands of happy customers), and I make no apologies for what I do or say. If there is anyone here that needs to offer an apology it is the guy spouting off things like "cult leader", "sloppy mess", "devoid of integrity", and "cultish faith". There is no place here for that kind of offensive language. You can apologize and stay or take it somewhere else.
If anyone wants to debate something with me that's fine, but you won't be disrespectful.