microZOTL Preamplifier


microZOTL Preamplifier


The ultimate expression of the microZOTL as a full-featured reference preamplifier and headphone amplifier.

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“Across every sonic attribute: timbres/color, image palpability/density, spatial qualities- air around players- tremendous soundstage depth/width/height, powerful overall dynamics, and deep extension with great low frequencies regarding tone/accuracy which gives a great foundation to the music.  All this and delivered with total liquidity and ease.  This preamplifier renders the illusion of real music better then any other linestage I have had in-house for review.”

Teajay, Audiogon

After years of refining and testing the microZOTL circuit, LTA has created the microZOTL Preamplifier. This is the highest expression of the amp as both preamp and headphone amp. In a beautiful new, low-resonance chassis designed by Fern & Roby featuring Cardas connectors, the microZOTL preamp contains all of the elements that we found improved the sound significantly.

A digital interface gives control (via the remote or the brass capacitive buttons on the faceplate) over the new stepped attenuator volume control and improved input wiring that greatly shortens the signal path. The power supply is larger and more refined, and there are several integral component upgrades in the audio circuit. We now use ceramic circuit boards, which result in the clearest, cleanest sounding microZOTL yet.

“I’m running the new preamp (S/N 005) with my XA30.8. The combination is flat out beautiful. I also have an MZ2 which worked well, but the new pre is just better in every way. Clarity, staging, dynamics (both micro and macro). Very liquid, fatigue free, but also dynamic and extended.

“. . . the beautiful chassis, the ergonomics, and that sound, rich organic timbres/colors, a sense of “aliveness” that I find in no other preamplifier, the smallest details easily heard, a spatial perspective that brings the musicians into your acoustic space, a sense of holographic imaging, and an effortless liquidity that lets the music “spill” into your room.

“. . . micro-details were clearer and were easier to hear all delivered with an overall liquidity and effortlessness that let the music flow into my room.

“. . . the MicroZOTL Preamplifier produced a spatial perspective that made my seven foot tall 21 driver speakers completely vanish in the largest and accurately layered soundstage that I have ever experienced in my listening room.”

-Greg, Audiogon


Amplifier class: Push-pull Class A, no feedback
Sensitivity: 0.6V RMS [full output]
Output impedance: (measured @ 0.5A, 60 Hz) 2 ohms
Input impedance: 50k
Power Supply Input: Auto-switching 100V / 120V / 220 / 240V operation or linear supply user-switchable between 110/120 and 220/240 (contact us if in need of a 100V linear supply)
Power Supply Output:  12VDC 2.5 amps
Hum and noise: minimum 60mV RMS or 90dB below full output (20Hz-20kHz)
Power consumption from ac power source: 33W
Power output: with 4-ohm load: 1W, 1% THD, with 14-ohm load: 0.5W, 1% THD
Channel separation: (4-ohm loads) 46dB, 100Hz-10kHz, (14-ohm loads): 54 dB, 100Hz-10kHz
Frequency response full power: (4-ohm load) +0, -1dB 10Hz-20kHz, (14-ohm load): +0, -1dB 5Hz-50kHz,
Voltage gain:  (4-ohm load): 10.3dB, (14-ohm load): 12.4dB
Size: amp: 9 1/2 inches (24.1 cm)wide, 4 3/4 inches (12.0 cm) tall, 7 7/8 inches (19.7 cm) deep (including connectors) 
         linear power supply: 12" (30.48 cm) x 3.25" (8.26 cm) x 4.25" (10.8 cm) 
Net weight: with switching supply: 5.35 lbs (2.5 kg)  - amplifier and external power supply)
                   with linear supply: 8.94 lbs (4.1 kg)  - amplifier and external power supply)
Finish: Aluminum case w/ lexan top
Tube complement per channel: 12AT7/6201 input, 6SN7 or 12SN7 output