Eminent Technology ET-2 Tonearm Owners

Thanks Chris,

I haven't yet caught up on everything but, what I'm sensing is awesome sonics from very economical carts. I will get caught up on this. I'm glad that Dgarretson has posted, his set-up is pretty amazing! (I wonder where he has his machining done?)

I know that IMO, there must be a few lps that most of us own, (or should own) that will be easy to obtain. I'm certainly up for a new record if I don't currently own it.

I haven't yet taken the time to re-post my virtual system but I've had some interesting findings.

This should be interesting to you all, I hope it doesn't seem all about me, even though it really is.

My tt is a wall mount. Sadly, it's not on a load bearing wall. I've done my best to compensate, I have a MANA (custom) wall mount as the basis for the tt, (also a separate one for the outboard motor, thread drive), I've made a custom motor enclosure that, after hearing the positive benefits, I've already decided to construct another. I'm using a combo of Symposium platforms and BDR shelves. I use a ET 2.5, currently running 17psi @ the arm, a Dyna 17D3. (I think this cart weighs around 5 grams).

What I'm getting at is this, I've had an issue where if the cartridge is sitting in the groove, tt not spinning volume up!, I'd get a low frequency rumble. This could be several things, and I've tried several things.

I recently purchased a double leaf spring I-beam, re-read the manual and my (2) counterweights are now at the end of the I-beam. To my surprise, performing the cart in the groove test now results in NO rumble. Hallelulia! Now I'm going to play Ryan Bingham's excellent "Hallelulia"



Recently I purchased a double leaf spring I-beam

****I recently purchased a double leaf spring I-beam, re-read the manual and my (2) counterweights are now at the end of the I-beam. To my surprise, performing the cart in the groove test now results in NO rumble. Hallelulia! **** -Slaw

Hah!

Frogman. Is your "Hah"! a good thing or not so good thing.

I still think that my new motor enclosure design will help.
I also realize that this fix may be somewhat a 'bandaid fix' towards other potential issues. In any case, I'm enjoying the problem being gone for now.

Slaw, sorry I wasn't clear. My Hah! is definitely a good thing! It was an exclamation intended to be an acknowledgment of and agreement with your findings. It was also a bit of a pat on the back (my own back, and hopefully not too arrogant on my part) since I pointed out the benefits of the double-leaf spring and of moving the weight as far out on the I-beam as possible a while back.

I am very glad that you were able to solve the rumble problem. Like you I have my table on a non-load-bearing wall shelf. I used to have it on a rack and had terrible issues because of springy floor. While the move to the wall shelf solved some problems it created others. I constructed a multiple-layer constrained-layer platform that the table sits on on the shelf and it works very well. Overall, it is a better solution than on the rack.

BTW, I love your idea of using a common or agreeable LP as a reference to discuss our findings with out ET2/cartridge set-ups.

Regards.