Eminent Technology ET-2 Tonearm Owners

Hi Chris and Harry,
I worked on the mods to the arm yesterday, but had to leave for dinner with the family before listening. -That's today, and I'll get back about my impressions later on.
I found out that the spring I've been using is a double, and was worried about using a shorter I-beam, as I also traded in my original magnesium arm for an updated one from Bruce which is heavier. -Got a good deal by the way!
So, I decided to try adding a third spring to my homebrew I-beam, my cartridge being fairly low compliance and mc.
 I had a problem with the new wand. The phono connectors are slightly loose. -They slide a bit. Should I pinch them down to get them tighter? I don't want to crush these little connectors, because that's happened before with a different wand and connectors. -A big mess to fix.
-On to woofers. My Wisdom speaker system uses two woofer cabinets crossed over at 120hz. I suppose that because they cross over so high, the designer recommends placing the front face of each one even with the dipole line sources.
One advantage with the electronic crossover is that I can adjust the volume at the lower end (20 hz and below), the volume at the crossover point, and the output of the woofer and dipoles separately. This is handy on certain recordings, but no remote control of any of this; just 4 attenuators per channel.
Cheers and thanks in advance for comments and sage advice,
John

I'm with you.  I was flattered to hear I test for best phase adjustment like you do.  Hand on sub driver while listening to bass passages.  I know that below a certain frequency (probably 60 to 75 hz) sound is almost directionless.  Well, the sound is not directionless but our ear/brain interface is unable to determine direction.  For this reason, crossed over low enough, one can place a sub just about anywhere without it calling attention to its location.  

The room/wife consideratons are, however, quite another issue.  For me to place my sub beside or behind my listening sofa would entail running cables under carpet which gets walked on (not good) or be ugly.  ("Do you really need those wires running across the room?").  

As you, no doubt saw from my system pictures, my Sunfire sub is behind my left main speaker.  It has both an active and passive radiator.  The active faces inward, across the front wall and toward the center and the passive points in the opposite direction.  When setting it up I was surprised that best response is 180 deg. out of phase.  My sub has a variable phase setting from 0 to 180.  For a while I thought 90 deg. was best but 180 is stronger.

Connections are from my power amp to the high level inputs on the sub. This for two reasons:  I have read that this setup is best for matching subs to mains, and I only have one set of outputs on my preamp.  Just for comparison, I tried a  Y connection at the  power amp inputs to the low level inputs on the sub but for some reason this resulted in a very ugly hum.  Either the pre or power amp did not like this setup.  

I am not perceiving an issue with integrating the sub with the mains, I would just like it to be a little tighter.  I think this is simply an issue with the quality of the sub itself.  I think Bob Carver uses a class D amp in his subs and while the Sunfire True Sub is no slouch it is certainly not the caliber of my Canalis Cambrias.  Speaking of which, I think you mentioned in a prior post you were not familiar with the Cambrias.  The Canalis speakers are a product of Spiral Groove.  They are designed by Joachim Gerhard who used to manufacture the German Sonics Alegra speakers.  Joachim has now joined Alan Perkins at Spiral Groove.  The Canalis speakers are virtually the same as Joachim's Sonics speakers but manufactured from bamboo plywood with tweaks to the crossovers.  You can see the whole Canalis line here: http://www.canalisloudspeakers.com/loudspeakers.php

The Sunfire was originally purchased for my home theater back when I had a Vandersteen 2W for the music system.  For some inexplicable reason I sold the Vandy woofer.  One of my larger buy/sell mistakes.  The 2W's mate very well with monitors and small towers.

Two of my obsessions in listening are imaging and detail.  I have found that monitors and narrow tower speakers do this best.  The Cambrias are basically a couple of monitors in a tall box.  The drawback is, of course, they don't move quite enough air.  Hence my use of the sub.  

All things considered, I think my best setup would be two small to medium size subs.  I've been looking at the Rel T5i an T7i. The 5's are a little short on power but given my listening habits they may be enough.  They probably would not work for your large orchestral productions, but then you always have room A for that.

Best,
Harry

PS to my above post: It seems that the spindle on the ET-2 is anodized aluminum.
I held a magnet to it and found NO attraction. Duh!  So, how does mounting a cabinet magnet under the spindle provide any appreciable damping?
Enquiring minds want to know.
Sorry,
John

Hi John,
I had same question but was too embarrassed to ask.
Thanks,
Harry

John, to remove leads I use a tiny fine slot screwdriver. I insert into the tiny opening between the lead and cartridge prong and rotate slowly.
Lead will come loose. To close leads that have opened I insert a round wood toothpick at the opening I want squeeze gently with pliers.
After learning how Frogman removes dimples from dome tweeters, I would be very interested to know how he does cart lead fix. 8^0

PS to my above post: It seems that the spindle on the ET-2 is anodized aluminum.
I held a magnet to it and found NO attraction. Duh! So, how does mounting a cabinet magnet under the spindle provide any appreciable damping?
Enquiring minds want to know.

that’s a question for Pegasus and I believe Dover also who used a fridge magnet. A picture is worth a thousand words !

using the best AudioGon Draw here is how I set it up.

x...0....x

x’s represent magnets - same poles facing one another
0 is the exiting spindle.

I need to go do some boat cleaning. can post a pic later of how I experimented with the magnetic damping, before it was abandoned. but I warn ahead time .....this is heading into that Audiophile dark area.....for reasons posted previously.

*****

Also Harry - I’d like to discuss the bass further, and I am very curious about Johns speaker setup.

fwiw - the Vandy sub was crossed off my list because it requires you go through their crossover first and then to your mains. Was not going to happen in my room..

So just a question.
Bass waves are slower than all the others. So why do people put subs X feet behind their mid and tweeter drivers ? Just asking.

If I was you Harry I would be very tempted just "temporarily", to set up in near field for one hour - just to hear what was possible with one sub. Then negotiate with the wife later. 8^0 hah hah

Cheers Chris