Benchmark LA4 vs Linear Audio Tube microZOTL Preamplifier (Level 2)

I’m very happy with my LTA MicroZotl level 2 preamp. I’m using it with a Coda No 8 amplifier.

I bought my LTA lightly used from a guy that moved to a high dollar integrated amp. He had upgraded the tubes to NOS Telefunken ECC801S. I experimented with several other tubes including the ones that he said came with the preamp. I did not like the tubes that shipped with the preamp. I’ve tried NOS Siemans ECC801S which are very nice and less expensive. Brimar Yellow T are warmer sounding and should be available from Tube Depot. In my system, I prefer the Telefunken, but would be happy with the Siemans.

@thriftyaudio - I own the LTA Microzotl preamp level 2. I think you are going to love it. When I first plugged it in, I was shocked what an improvement it delivered compared to my older tube preamp.

Let us know what you think once it arrives! 

@yyzsantabarbara I was hoping you would contribute.  We seem to have similar tastes in audio.  I am hesitant to try a different DAC since I just purchased the Bricasti M1S2 a few months ago.  I compared it directly to a Chord Dave with M Scaler and a Mola Mola Tambaqui (both in my system) and the Bricasti was the clear winner.  Even used it was a bit expensive so I want to hold onto it and enjoy the music.  I like the various filter options it provides to match with recording productions.

@audphile1 thanks for the recommendation.  I have tried the M1S2 without a preamp in line, but the sound became muddled at higher volume.  The LA4 does a better job with the M1S2 than the DAC does by itself.  I am holding out hope that Pass Labs will release a dual monoblock version of the XA25.  I will definitely upgrade the power amp for them!

@zlone thanks for sharing your experience.  I really wish I had found a used XP22 to try in my system.  Maybe I will find one in the next few weeks to compare with the LTA and Benchmark.  The added benefit of a Pass Labs preamp would be the ability to turn the XA 25 on/off with the remote.

@sls883 ​​@bluethinker I have heard nothing but praise for the MicroZOTL Line 2 form several sources.  I have a new one on its way with three sets of tubes (standard plus two different upgrades tubes).  I will not be purchasing additional tubes for this comparison, but I will try all three sets of the supplied tubes.  It should be fun!  

Maybe I will keep the LA4 and switch back and forth.

@thriftyaudio I think you'll like it.  I had two different conrad-johnson preamps before the LTA and I prefer the LTA.

I'd be curious to hear which tube types you try and which ones you like. 

@thriftyaudio - Out of curiousity, what are the alternate tubes you’ll roll with the LTA preamp? I’d love to hear your impressions as I’ve only heard the stock NOS tubes it shipped with.