Danny Richie "fixes" the Linkwitz Arion loudspeaker

Yes you can buy the sub cabinet separately, $300 per pair and free shipping.

His friend and neighbor Nelson Pass (designer/maker of the First Watt B4, of course)---knowing that digital filtering was not going to be well received in Asia---asked Linkwitz if he wanted him to create an analog x/o for the LX541.

As Nelson Pass told the story at a Burning Amp a couple years back in which they were honoring Siegfried Linkwitz who just passed away, it was Siegfried who pestered Nelson about building the ASP (they often spent time together in Sea Ranch talking audio and eating cookies as Nelson tells it). Nelson had to think it through a bit but came up with a design and in line with his generous nature and contributions to the DIY community had 100 stuffed boards he distributed at the event. I was lucky to get one and they are now available in a complete build kit including a very nice chassis at the DIY Audio store for a very reasonable price.

@erik_squires, who are you referring to?

@bdp24 he most certainly was aware of room nodes, he just believed there was a better way of dealing with them than using bass traps.

@bdp24 While Roger did not like to use bass traps or other acoustic treatments he did understand the benefit of and how to get multiple subs to work well in a room. I had heard of the concept of the distributed bass array through Duke Lejuene of AudioKinesis, but it wasn't until I started working with Roger that I became more familiar with it. Roger read Toole and Geddes. He really liked Geddes' speaker design principles and adopted a three sub set up for his system which used an active crossover with active EQ and biamping. That is where the similarities end though. Roger's woofers that he ended up using in his DBA are low mass (achieving the same benefit as what Richie says his servo woofers do) and are in very small sealed boxes which he preferred for what he termed the "airspring" effect.

Yes I have been watching some of the tech talk videos and decided to try using an OB sub but I decided against the GR model due to having to use the dedicated servo amps. I prefer to work with what I already have on hand and purchased the OB cabinets for the Linkwitz LX521 from Madisound. I will stuff them with some Dayton Audio drivers that will work well in them with little EQ. I do intend to use them with the sealed subs I made with Roger (he liked 8" to get the cabinet smaller, but pointed me to some nice 10" drivers as well that are higher in mass but still fast enough in a small enclosure) so will try reversing the polarity on the rear subs.

@rushbutton, totally agree with active crossovers. Doubt I will ever go back to passive. 

The really nice thing about it for Linkwitz owners is that you can run the various EQ simulations through the ASP just as you would in the miniDSP that comes with the speakers. Requires a bit more work but for an analog crossover it would be worth it in my opinion.

I have Roger's personal ESLs and direct drive amp and they are quite good, but I think the ESLs fall off a bit due to their size. It suited Roger's tastes and mine for the most part, but they don't sound as big as my Acoustat Model 2 or Analysis Audio Omega. They remind me of the Quad 57, what they lacked they made up for and then some in many other areas. Roger told me many times if he decided to make more ESLs he would double the width and add a bit more height to the panel.

I never liked SoundLabs and would venture to say your ETs would sound better. I would someday like to have Sanders ESLs and see if I can find a way to modify them to use a direct drive amp. To me they are a great "personal" speaker because of the narrow sweet spot.

Few know how maximize dispersion in a panel. The curved panel is a method, although I once read that Roger Sanders may have been onto the curved panel first, but decided against producing them. Jim Strickland was on to something special before Acoustat blew up, and Roger Modjeski kind of stumbled onto the same track and developed a few tricks to get wider dispersion from a flat panel.

@riverdinaudio just heard these a short while ago as part of an SFAS event in NorCal. An amazing speaker indeed. There are a couple of Linkwitz speaker owners near me and I have enjoyed listening to them. With all due respect to Danny Richie I think he came up well short on his analysis of Linkwitz speakers. The man was an incredible designer and it's good to know his legacy will continue to live on through the efforts of Frank Brenner.