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  1. #1
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    Linear Tube Audio ZOTL40 Reference amplifier?

    Any thoughts on this EL34 based amp? I know itís probably not as sweet as the typical EL34 amp.

    I wasnít really crazy about the original LTA Microzotl MZ preamp/headphone amp. A little too sterile for me, even with NOS tubes and upgrades.

    Iím looking for 20wpc to possibly 40wpc of sweet and easy (zero to low maintenance) tube goodness.


    ZOTL40 Reference Amplifier - Vacuum Tube Power Amp — Linear Tube Audio
    Last edited by joeinid; May 22, 2021 at 10:17 AM.
    Franco Serblin Accordo Essence, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.

    Job INTegrated. Luxman L-595a, NAD M33.

    NAD C 658 streamer.

    First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)

    RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.

    Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.

  2. #2
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    Quote Originally Posted by joeinid View Post
    ...Iím looking for 20wpc to possibly 40wpc of sweet and easy (zero to low maintenance) tube goodness.
    ymmv but ... tube goodness = single-ended-triode amplification.

    to get north of 20wpc in SET land one is looking at 211 and 845 output tubes. there is also the 6c33c tubes which are ~18wpc. however, fwiw: the manufacturer of my 97 dB speakers recommends:

    Recommended Power:
    5 - 50 high-volt tube watts
    50 - 250 transistor watts

    absolutely no clue as to why the difference but it appears all wpc are not created equal. so, you might be able to relax your min wpc constraint, thereby, increasing the universe of output tubes to consider. worth checking out if you are going down this route.

    also, the wpc you actually need is not only a factor of speaker sensitivity but also listening level, room size, etc, etc. according to one SET amp manufacturer i spoke with, the power needs of customers with the same sensitivity speakers can differ by a factor of 10 due to these other considerations.

    in terms of low maintenance: auto biasing is definitely good for that ...and, the the fewer tubes the better. my almarro a318b is an integrated SET amp with only 4 tubes!! in addition to being more economical, this makes it quite easy to troubleshoot any tube issues should they occur.

    enjoy!!
    kanjiroba yak + roon rock > t+a dac8 dsd > air tight atc-5 + atm-300r almarro a318b > viking acoustics berlin r mk2
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  3. #3
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    With your stated needs, Viva IMO....
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  4. #4
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    I like the Viva suggestion. Thank you Jim.

    Thank you aKnyght.
    Franco Serblin Accordo Essence, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.

    Job INTegrated. Luxman L-595a, NAD M33.

    NAD C 658 streamer.

    First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)

    RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.

    Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.

  5. #5
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    Yeah, if the LTA MZ2 wasn't sweet enough I'd go a different direction - Jadis comes to mind. It's like a ray of sunshine type sound. Excellent transformers for bass control. There is a 35 watt version that might be perfect.

    In fact, if I try a tube amp again that's my likely path. I'm still kicking myself for not buying a friend's i50.
    Brinkmann Bardo w/ EMT HSD-006 cart, MSB Premier DAC --> Linear Tube Audio MicroZOTL --> Ampzilla 2000, 2nd Edition --> YG Acoustics Hailey 2.2

  6. #6
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    Air Tight ATM-1S

  7. #7

    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    Joe, 845 tubes sound grade with Serblin. Iíve heard great things about Aeries Cerat. Viva might not be powerful enough. The MasterSound Evolution is around 60 wpc in parallel SET. Iím loving my MasterSound PF100ís, putting out 120 watts each of 845 PSET goodness.

  8. #8
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    I bet the MasterSound are insane. Always did want to try them but I seem to circle in and out of tubes. I wanted something as plug and play as possible but then realize it might not be the sound Iím looking for.

    I need to be patient. My Luxman 595 could be here next week.
    Franco Serblin Accordo Essence, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.

    Job INTegrated. Luxman L-595a, NAD M33.

    NAD C 658 streamer.

    First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)

    RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.

    Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.

  9. #9

    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    The Luxman seems like it would be perfect! Did your Accordoís arrive?

  10. #10
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    Accordo are scheduled for sometime next month.
    Franco Serblin Accordo Essence, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.

    Job INTegrated. Luxman L-595a, NAD M33.

    NAD C 658 streamer.

    First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)

    RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.

    Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.

  11. #11
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    Re: Linear Tube Audio ZOTL40 Reference amplifier?

    The ZOTL 40 is getting an upgrade. Now in BETA Testing with some users. Suppose to be quite a step up in performance according to one of the BETA testers on A-Gon.
    Amps: First Watt SIT-3, Pass XA25, Valvet E2 SE, LTA Ultralinear, LTA ZOTL40, ARC 150M, First Watt SIT-1 Mono's, ARC Ref75SE, Coda #8, Luxman M900U, Pass XA30.5, Decware Zen TorII MK4, Line Magnetic 845 Premium, Raven Reflection MK2, Audio Hungary Qualiton X200

    Pre-Amps: Luxman 900U, Coda 07X, ARC MP-1 Multi-Channel, Conrad Johnson Met-1 Multi-Channel

    Disc Spinners: Luxman D-10X, Ayre DX5, Oppo 105/205

    Speakers: Cube Audio Nenuphar, Fleetwood Deville, Volti Razz, Spendor Classic 100, Rosso Fiorentino Certaldo 2, Falcon LS 3/5A, Klipsch Cornwall IV, Harbeth SHL5+, Omega Compact 8, Triangle Comete 40th Anniversary, Audio Solutions Figaro M


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Linear Tube Audio ZOTL40 Reference amplifier?

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