What Class D amps will drive a 2 ohm load

According to this the M1s are manufactured by Paradigm -   http://www.theabsolutesound.com/articles/anthem-statement-m1/?page=4

I'm the guy Ric was referring to who previously had a Bryston 14BSST (15 amp version as that's all I could get with my circuit in the old house) and a Modwright KWA 150SE amp to drive my Thiel 3.7s  Before the 3.7s I had Thiel 7.2s.  The room in my old house was huge (19 foot ceiling and over 6,000 cu. ft. that opened into other spaces) and on certain things (both music and movies as I have an integrated system with a Modwright LS 36.5DM preamp) the Bryston 14BSST would go into protection mode from overheating due to the impedance.  I had to build a custom amp stand with fans inside.  The Modwright (amp) drove the 7.2s better but still would get so hot (and the heatsinks are inside the case).  I ended up selling the 7.2s and getting the Thiel 3.7s (when they came out), which, although not as bad as the 7.2s are not an easy load (https://www.stereophile.com/content/thiel-cs37-loudspeaker-measurements).

Anyway the EVS 1200 dual mono amp not only sounds better than the Modwright  KWA 150SE (which was better than the Bryston) in my system, it doesn't even get warm to the touch when I crank it loud.  My current room is not as huge as my old one but it is still a big room (over 3,000 cu. ft.) that opens up into other spaces that are probably a bit bigger than the room itself (system is in the living room which is completing open to the foyer, dining room and most of the kitchen).

The CS5 impedance (https://www.stereophile.com/content/thiel-cs5-loudspeaker-measurements-0) is tougher below around 70Hz but probably not quite as tough as the 3.7s over the rest of the band.  After the EVS 1200 (which I've had for just over a month), I have no desire for anything else.  I'm still tweaking things and had a friend over (he has a Pass Labs amp, XA25, but his room is smaller and his speakers are more efficient and an easier load, Reference 3A Taxims) and he was quite impressed with the sound he heard from my system.

" With these sorts of speakers like the CS5 ect it’s no wonder, these tested figures show it was definitely no current master into low impedances
8ohm load 690w
4ohm load a reasonable 1000w
2ohm load it barely got off the 8ohm mark at 720w, very sad."

That probably was the beginning of what turned me off to mainstream dealer sold companies (not that Bryston is anything but a good company).  Before I bought the 14BSST, I was using a 6BSST on the front (3) channels.  As noted the room in my old house was huge.  I had a 4BST at one point and it was clear that was at its limit driving the (Thiel) 7.2s.  I corresponded back and forth many times with Bryston about the 15 vs. 20 amp version of the 14BSST.  When I had the old house built (basically in mostly in the first half of 1997), I specified I wanted an extra receptacle on its own circuit in addition to what would be behind the audio system.  I found later they used a 20 amp breaker but just used 14 ga. wire.

Anyway, the purpose of many communications (with lots of detail) going back and forth is I wanted an upgrade to the 6BSST (and in my old room was probably around barely above its limit based on my old 4BST where I had situations where it would almost go into protection mode) and then just use the 6BSST on the center and surrounds.  I guess they just didn't want to admit that the 15 amp version of the 14BBST wouldn't drive my 7.2s.  Before I sold the 14BSST, I sent it back to Bryston to have a check-up to make sure it was OK and it tested fine.  When I spoke to the technician and went into detail over the phone and told him my Modwright KWA150 SE drove the 7.2s better, he just told me that was (literally) impossible.  I may not be a technician but can feel heat and the protection circuits certainly confirmed the heat felt.  The guy I sold the 14BSST to had B&Ws so I didn't think he'll have an issue with it (and he didn't).

So that was the beginning (and in combination with the fact that there are fewer brick and mortar 2-channel dealers than there used to be vs. stuff like custom installers who don't have showrooms) about a dozen years back of what pushed me more in the direction to look at things that are sold consumer direct.  When one considers the cost of materials/quality that one gets at the price point, it is just off the charts compared to what gets from going to a brick and mortar dealer.  One may not be able to go to such a route for all purchases for various preferences and purposes but it is a strong consideration for me personally.  I have multiple systems (including one with a Hegel H190 and one with another with a Class D amp using the IcePower AS1200 stereo module) in different rooms and I'm quite satisfied that if I were to walk into a store the EVS 1200 would compete favorably to amps between $10-15000 (my Modwright was $9k list and the Bryston 14BSST was not a cheapie either) and if I went to buy either the Modwright or Bryston today used, I'd likely be paying almost double what my EVS 1200 costs new and I already know which amp is easily much better in my system.  

The only caveat I'd have about the Purify 1ET400A as a separate power amp in the gain spec of 12.8dB.  I'm sure that doesn't hurt the distortion specs but may not be good for many people depending on their associated equipment.

" Having read this very interesting discussion in its entirety several times I have to ask the commentators a question since neither the pros or cons truly answered the original Inquiry.
Let's say I want to take a plunge into class D but do not want to revamp my entire system and the speakers in user are rated at 90db efficiency with nominal impedance of 8 ohms 3ohms minimum. Can a class D amplifier (let's use 300w per channel)do justice and get the best or close to the best from the speakers?
Let's hear your opinions."

I've already noted how easily the AS1200 can drive my Thiel 3.7s.  These -  https://www.muraudio.com/sp1  (and it indicates 2 ohm minimum and they are not super efficient) were used by Merrill Audio at the 2019 Florida Audio Expo and sounded great.  I've seen a bunch of other examples at shows in big rooms (e.g. 2017 RMAF with a Wyred4Sound Class D driving Acoustic Zen Maestro speakers (87 db and rated 6 ohms nominal).  I think will any product, it is too general to just say Class D as if they are all identical (same is true of any other type of amp).

Yes - definitely getting the best from the 3.7s vs. other more expensive amps (and not just my opinion as others have heard it in my system with Class D and I'm not talking about non-audiophiles but people who have gone to shows and heard really expensive high end systems).  Now I'm not saying that there aren't products out there (as there are many products consisting of different amp classes) that might sound better (I can only offer actual experience, vs. theories which are just that and not particularly useful vs. actual in home listening and including the reaction of others who have heard it in my system in my room and no need to insult others who can hear vs. someone who has not heard the system in the room).  That does not mean that it is the last word in amplification. Upon my first listen (after breaking in a Class D amp), I was shocked how well it drove the 3.7s and how much better it sounded than two highly regarded non-class D amps with list prices of around $9k.

George, with all your comments on various threads, why not just start a new thread about the theoretical disadvantages of Class D?  Would not that be better to have all that discussion organized in one thread?  Once would think (at least I would, others can disagree of course)  that it would be far more productive than insulting other peoples (and a bunch of people who have had separates for 30- 40 years) hearing.  Personally, I just don't see the point of regurgitating the same comments with a complete lack of actual experience with the room and the components and speakers. When I had a friend who worked at a high end shop many moons ago and did virtually all his set-ups in deliveries with him (and I'm talking some two channel systems with around $150k in costs going back more than a dozen years), I learned very quickly not to say that for example a particular speaker is always wonderful sounding (I heard pairs of speakers I previously owned that sounded like complete crap in another room).  I don't take any of your comments personally (or those by anyone else btw).  I can't take anyone all that seriously who makes comments without actually hearing things (and I would have no problem if you heard it and posted all over here that my system actually sucked in your opinion).  Not trying to start anything.  Just think it would be best to get all points of view concentrated in appropriate threads (and would be fine if this thread was linked in a new thread - much betting than making comments that really are not that relevant - if you think they are, then why don't post your actual experience using Class D vs. other classes of amps driving Thiel 3.7s or 5s and if you don't have any that is basically what I'm saying - theories are fine and at one point the earth was flat according to one as well)

All I try to offer in any particular thread (and as noted per my last post I have lots of experience setting up systems and among the speakers that the store carried where my friend worked were Thiels and Maggies), and this will be my last word (regardless of how many more insults someone wants to hurl my way whether that is not be able to hear or not knowing what an impedance curve is, and an impedance curve I've already previously referenced here if someone actually read my comments which apparently some have not), is actual experience intended to provide additional relevant information to a question posed by the thread originator.  It is not intended to made judgments about other peoples tastes, listening habits, etc.

With forum like this one, I've already noted and quoted the Wikipedia definition of an internet troll in these threads.  It is just the way it is and nothing to get all excited about, it is the norm that there will always be a few.  For example, if someone asked a question about Magico speakers, which by the way I think are wonderful and have heard in a store more than once and at audio shows more than once, and I started making theoretical comments about something that they don't do well, there are probably some people after the first comment who might consider me a troll (it might be a bit judgmental for one comment).  If I continued making many comments over and over with no relevant experience to offer to the original poster's question, I'm sure there would be more and more people who would think that I'm a troll (and I'm not sure how I would argue that I'm not).

This is not to pick on a particular person.  It is just to make my point that it is probably best to start a new thread vs. make comments without actual hands on experience relevant to the topic.  As an example, at one point I bought a lightly used Bryston 14BSST (15 amp version) when I originally had Thiel 7.2s (and I've already posted this information within the Class D threads if anyone bothered to read). I used them in a huge room (probably almost 7,000 cu. ft. that opened into other spaces).  I listen to a wide variety of music, some of which is very dynamic.  The impedance of the 7.2s caused the amp to shut down a bunch of times.  I called the guy I bought it from who had Thiel 6s (which I heard many times and help deliver more than one pair) and only listened to small jazz combos in a small or average sized room and did not play things at the levels I might.  If I posted a blanket statement that the 14BSST can't drive or get the best out of any Thiel speaker, I don't think that would be either a factual statement or one that would probably be useful to someone posting a question.  An example would be the question posed here which deals with what Class D amps can drive certain things.  The original poster is entitled to seek information from others about their experiences and determine if there is something he or she would like to try in their system.  That does not mean that if they tried it, they would like it better than another amp or might find faults with how it sounds.  It is just more helpful when someone provides feedback about their experiences so that the person posing the question can come to a conclusion as to whether something is possible to use in their system.  That's all from me.