Eminent Technology ET-2/2.5 v. Advance Analog MG-1

Hello: Just curious if anyone's compared or has any technical experience with setting up and listening to two air bearing tonearms we're interested in:

1. The ET-2 or 2.5;
2. The Advanced Analog MG-1 (www.adanalog.com).

Right now my wife and I listen to a Well-Tempered Super Classic with the Reference Carbon Fiber Arm; we plan on substituting the Reference Arm with an air bearing setup. Perhaps the Well-Tempered might not even mate well with an air bearing configuration, in which case I ask for your broader experience and proper guidance in this area of engineering before we take the plunge.
I am not familar with the mg-1 but i have the equivalent of the et2.5 with my maplenoll. The maker of the et arms used to own/operate the maplenoll line. The arm is one of the best deals imho and can produce fantastic sound once set up. if you call bruce at et, i am sure he will help you set up the arm on the table. they are pretty easy to set up if you are handy with simple handtools. I have modified my arm(see my system pics) and have remounted the arm on my plinth. Keys in operation of any airbearing arm are stable air supply and levelness of the table. If you are not prepared to tackle both of these, do not go with the air bearing. but set up properly, it will take any cartridge to new levels of performance.

IMHO the ET and the Maplenoll are related but quite different. One main issue is the Maplenoll is designed to run at 50PSI or so and the ET is designed to run at 4PSI. The MG-1 is a similar low pressure design like the ET but appears to be set up more like the Kuzma in that the arm is attached to the outside sleeve. Also, I was not aware of Bob Dilger manufacturing the ET arms or Bruce Thigpen making the Maploenoll table/arms. My understanding is that Bruce developed the arm and Bob followed in his footsteps with Maplenoll.
your knowledge of the history is probably much better than mine. I remember from doing a lot of research on the maplenoll arm, that thigpen designed the arm when he was involved with maplenoll. My comments are more around the quality of an airbearing/linear tracking arm system and the ease of setting them up as well as highlighting some of the issues with airbearing arms. As far as mounting the arm, bruce is the best person to talk to since his company sells the arm and would know pretty quickly if it is compatible with the well tempered table
Bruce was never actually involved with Maplenoll per se. Your other comments are, of course, quite relevant (more than mine).
Thanks for your gracious responses guys: We are using an active Vibraplane w/ a Jun-Air compressor; so, the isolation and leveling factor should be all set for successfully implementing an air-bearing tonearm.

By the way, I have come upon numerous precautionary warnings that an air-bearing arm -- especially the ET -- requires quite the skills to set up properly, e.g. "These are not toys or for the inexperienced." Hopefully, once we get to that stage of investing in an air-bearing setup, the configuration won't be so daunting that I end up misaligning the many variables consistent with successful analog playback.

Thanks again, and long live audio engineering in advancing the Arts & Sciences.
hi Folks:
I have had the MG-1 for more than two years now and am very happy. It comfortably replaced an Origin Live Silver and I think the improvements the MG-1 brought were comprehensive across the board. It might be a giant-killer arm at it's price.

A few issues I should mention - the quality of the arm wand itself is a bit iffy. It's plastic, and it actually cracked a little because of my over-tightening of screws. I got an additional, premium lighter arm for the setup (also bought through ada on the site - it was about $200) and I ran into similar issues, but overall, crack and all, the arm still sounds wonderful. If you're careful this shouldn't happen. The air-bearing tube (with holes) also appears to be plastic, but that hasn't caused me any issues.

The rest of the assembly is metal, very sturdy and seems well designed.

One other potential issue is that I haven't found a good way to ground the arm which can cause static build up sometimes. Finally, you have to be very careful in applying the stylus to the record - there is no soft landing, so you need to swing the lever slowly. I recommend praacticing a lot with a cheaper cartridge first.

All told, it's an excellent way to try an air-bearing setup. I find I'm not tempted by any of the $4k arms out there like Triplanar or Graham Phantom - maybe they would be better, but I'm really not so sure, as this arm sounds so good. Apparently the arm is modeled after the AirTangent, and if you compare them they do look very similar and operate in the same way.

You definitely need to arm yourself with the right tonearm protractor/measurement tools to get the setup right, but overall I've found the arm pretty easy to set up. You can see a photo of it setup with my Teres 255 on my virtual system.
As for the ET2 requiring a great deal of skill to set up, I would like to offer this comment: I have owned an ET2 for almost 20 years. A few years ago, I got the "itch" and purchased an Origin Conqueror. The ET2 was in a box on a shelf for 4 years or so. Recently, I got it out, cleaned it up and installed it in a few hours. Instructions are online and pretty easy to follow. And, I have found Bruce form ET to be quite helpful. So, to me, it was a breeze to set up. Additionally, one of the posts stated that ET2's don't go well with Sota Turntables. Nothing could be farther from the truth. It's a perfect match. ET's own documents show them on Sotas, the training manuals are shown on Sotas. I had an ET2 on a Sota for 15 years and it was flawless. So, I don't know where some people get their information that they post as experts.
I can comment on the ET arms.
I own a 2.0 and 2.5.

According to Arthur Salvatore's members the 2.5 works best at 19 psi which is what I run mine at. Above 19 and you start to lose detail.

Both arms can be seen here.


They need to be mounted on a level rigid platform/arm pod. Any movement in the platter affects the arm greatly as it is very sensitive.

Once setup they need no adjustment but they are not plug and play to get set up correctly. There are techniques and short cuts though. All the adjusting screws and bolts are there for a purpose and Bruce is fantastic in support and with questions.

Feel free to email me if you would like more detailed info.

Cheers Chris