Eminent Technology ET-2 Tonearm Owners

I must remember my lines
Richardkrebs .... has an increase of 6-12db at fundamental resonance
I must remember my lines
Richardkrebs .... has an increase of 6-12db at fundamental resonance
I must remember my lines
Richardkrebs .... has an increase of 6-12db at fundamental resonance
I must remember my lines ....................
Dover

Richardkrebs - Has anyone else thought that this hobby of ours is an addiction?

A strange phenomena in my household. Family members seem to think that addictions can be treated; It forced me to use a different tact. I now use the word disease instead in our house. For some reason I can’t explain, it is more effective

Ha-ha-he man – please tell me my last post brought a couple ha-ha’s to you?

FWIW – the first time I saw that I almost soiled myself. I actually printed it off and put it on our fridge. I think it helped me to bring in one amp and one speaker. (grin)

Fyi –

Here is my ET2 and ET2.5 tuning information for various compliance cartridges from the last year. From a compliance high of 50 down to 10. And VTF’s of .8 gms to 2.1gms.

ET2 and ET2.5 Cartridge Setups

Richard – fwiw - I am getting excellent early results in my room with my low compliance XV1 and triple leaf spring. 2 fat and 2 skinny weights setup according to Dorothy. :^)

If you are the least bit curious I highly recommend you listen to your setup with a decoupled I-Beam – using a triple leaf spring and just the inert lead weights.
You could try this with and without your now famous lead spindle slug?

Two I Beams and 5 loose leaf springs to make up a double and triple leaf spring can be purchased from Bruce for a very nominal amount of money. Otherwise enjoy the tunes.

Cheers

Chris.
I have added a multi spring test to the long agenda of things to try.

Liked you cartoon. How true.

Many thanks

Richard - I find the word multi-spring can be misleading.

We are actually joining (glueing) single leaf springs to make one thicker one.

Think of a truck with a leaf spring in the back.
leaf spring suspension

I see this as similar physics except we are working in a horizontal fashion not a vertical one.

The suspension becomes more compliant if we remove leaf springs from that truck. More firm if we add springs. As we add springs we need to add weight to the truck otherwise it becomes bouncy on the road. The ET2 is the same. As we add a leaf spring or two we need to increase VTF if using the same cartridge. We also need to keep the inert lead weights at the end of the I Beam for resonance control – away from the air bearing.

MOST ET2 users go wrong with the lead weights - imo - because they are coming from developed habits with a pivot arm. What do you do to increase VTF with a pivot arm? You bring the weight in more toward the bearing. The ET2 is a unique tonearm unlike any other with a decoupled counterweight. The weight needs to stay at the end away from the air bearing to not impede it and for resonance control – away from the air bearing. So we just add a weight and keep it at the end.

My direct experience – adding a leaf spring (glueing two together) to the ET2 or Et2.5 means it can carry a higher load (heavier less compliance cartridge) better. The result in sound with heavy MC is amazing. Bass is further tuned to your room by turning the counterweight cap downward or upward. This will depend on your actual room and how good your bass compression is with the speakers you are using.

Thanks again to Frogman for bringing the double and triple leaf spring to the discussion here. Bruce has been shipping loose leaf springs out with his tonearms for years. His customers probably look at them and think - wth is this for - maybe a spare ?