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Lamm LL2 tweaks?

After a very long search I decided to upgrade my Rotel preamp to an LL2 Deluxe. This should be a HUGE improvement and I can't wait for the Lamm to get home!!!

As I wait I'm already wondering which tweaks others have found most effective with this unit and would like your input.
- Tube rolling: I've seen several posts stating it does indeed react to this. What should the pecking order be? 12AU7, 6922, 6X4? Which tubes have worked best for you?
- Vibration control?
- Power cord: I've seen a post stating the LL2 is inmune to PC upgrades. Do others agree?
- Tube dampers?
- Which interconnects have worked best for you?
- Other thoughts?

FWIW it will be paired with a McIntosh MC275 with rolled tubes. ICs are cheaper Nordost, and my next weakest link is my CD player, and I will likely add an outboard DAC.

Thank you!
lewinskih01
flg2001's avatar
flg2001
543 posts
 
I own an LL2 preamp, changed the 6922 tubes for NOS ones and got different but not better sound from stock ones.

I am using a Siltech SPX30! PC and that changed the preamp in a much better way, open, fast and more a more liquid presentation.

No footers so far.
lewinskih01 OP
793 posts
 
Thanks all for the input!

Tvad: I recall an older post of yours where you stated the LL2 was rather inmune to power cord upgrades. Maybe that perception changed after trying the Dominus?

For those who noticed an improvement from tube rolling: which tubes should I roll first? The 12AU7, 6922 or 6X4?

I'm certainly going to try it stock first and then go from there.

Keep the feedback coming!
tvad
9,467 posts
 
05-10-10: Lewinskih01
Tvad: I recall an older post of yours where you stated the LL2 was rather immune to power cord upgrades.
Please post the comment here. I don't recall writing that, but if I did, then yes my opinion changed.

I'd not leave the stock versions of either the 12AU7 or 6922 installed in the LL2 Deluxe. Swapping them for better NOS tubes makes a difference worth the expense.

Changing the 6X4 is not as important, IMO.
lewinskih01 OP
793 posts
 
Tvad,

Please don't take my reply as a challenge. It certainly is not! I appreciate your input. I have been digging the archives for info so I had some background prior to posting.

I went back and searched, and searched, and I could find nothing! I was going nuts! I was about to quit digging when I remembered I had also searched the asylum, and there it was: June 22, 2006. http://db.audioasylum.com/cgi/m.mpl?forum=amp&n=97660&highlight=tvad+ll2+immune&r=

But then again, I did not mean to challenge you. Changing points of views based on further experience is good, in my book.

Regards,
Horacio
tvad
9,467 posts
 
By golly, Lewinskih01, you're right! Clearly, I was drunk when I wrote that.

Just kidding.

The Purist Audio Dominus *did* make an observable and positive difference on my LL2 Deluxe by tightening and controlling the bass.
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