2. amps-preamps
  3. 192332-179657

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

I have enjoyed my LA4 preamp, but I want to see if a quality tube preamp would be more to my liking. I have ordered a LTA MicroZOTL Level 2 and it should be here in a few weeks.

My current set up:

Acoustat 1+1 with a SPL Crossover and dual Rhythmik F12SE subs

Innuos Pulse paired with an Innuos Phoenix USB

Bricasti M1S2 DAC

Marantz 8003 SACD (rarely used)

Technics SL1500 turntable with AT VM540ML cart upgraded with a RigB body

Pass Labs XA 25 power amp

Upgraded, but not excessive, cable

I have a month to compare the two preamplifiers and decide if I should make the move to the dark side (tubes). Everything I have read suggests the MicroZOTL L2 should improve stage presence, separation, and depth without significant detail loss. I do 95% of my listening through Qobuz and Sense with the rest from vinyl. The SACD player is only used for the occasional SACD not offered as HD through Qobuz.

Prior to settling on the LTA I listened to a used Electrocompaniet EC 4.8 Mk2 (had not settled on trying tubes yet.) (poor detail when compared with LA4 and narrower soundstage).   I also wanted to try a Pass Labs XP 22, but could not find a used one to try at home (also prior to the tube exploration).  I auditioned a used ARC 5SE (decent soundstage, but suppressed high end and the bass was underwhelming). 

I am looking for any guidance or suggestions the Agon community might have for me.

Thanks in advance!

Ralph

128x128thriftyaudio
thriftyaudio's avatar
thriftyaudio OP
57 posts
 

@robshaw I truly understand.  While I am retired, I am active in two groups (one Board), plus creative writing, woodworking, and honey-doos.  It keeps me busy.

The addition of the SPL Crossover is perhaps the single biggest improvement for my system.  The bass extended and the total sound improved significantly.  I occasionally make bass adjustments depending on what I am listening too.  There is nothing like listening to the 19812 Overture with canon and having the bass turned up and over emphasized!

If you could swing it you might want to look at this JL CR-1.  I did not see any SPL Crossovers available used in the US.  I highly recommend an active crossover if you have dual subs (or more).  

https://www.usaudiomart.com/details/650175851-jl-audio-cr-1-crossover-free-shipping-in-conusa/

robshaw
262 posts
 

Thanks so much. I will explore that avenue and do some research. Much appreciated. Robert

thriftyaudio's avatar
thriftyaudio OP
57 posts
 

I have listened to the Ray Reserve tubes for the past week. The improvement I heard from the LA4 to the LTA MicroZOTL was matched by the improvement with the RR. Still waiting for the Gold Lion to arrive. It sounds like LTA will be offering Ray Select either in place of, or with the Gold Lion. I am hoping there is some change, but I cannot imagine what it would be. The good thing is I will have back up tubes in case anything fails.

Only two things on my upgrade list now.

1) Monoblock Pass Lab XA025 amplifiers.

2) Innuos NG item to replace the Pulse and Phoenix currently in place.

I am always concerned the Acoustat 1+1 will reach the end of life (close to 40 years old), but I will cross that bridge only when I absolutely have to. The entire system is built around the Acoustats!

thriftyaudio's avatar
thriftyaudio OP
57 posts
 

Installed the Gold Lion tubes a few days ago and let the system adjust. Performed the critical listening test tonight. I was expecting little or no improvement. The first few passive listening sessions were a bit of a disappointment.

Started off with some classical and went, ’wow.’ I thought it might just be my music selection. Moved onto a quartet with Vivaldi and was also impressed. Pushed on with Santana, then Horslips, and finally some good ole Three Dog Night. I am stunned. This pre-amp, in my system, sounds amazing. Just to push the sound a bit I tried some Stray Cats. Nirvana... today. Probably tomorrow too!

I was getting ready to upgrade the streamer to an Innuos NG product, but that is on hold. I am at a satisfaction state. It is best that I hold onto this for awhile. It is nice.

 

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