Linear Tube Audio ZOTL40 Mk.II Stereo Amplifier
Best transparent audio for discerning audiophiles.
Experience exceptional audio with the Linear Tube Audio ZOTL40 Mk.II Stereo Amplifier. Designed by David Berning, this 40Wpc amplifier utilizes the innovative ZOTL circuit, eliminating output transformers for superior sound. It seamlessly functions as a pure power amp or an integrated amp with its built-in volume control. Enjoy easy maintenance thanks to self-biasing and long-life tubes. Its universal power supply and robust build ensure reliability and versatility for discerning audiophiles.
$5800.00
More ZOTL40 Options
Owner Satisfaction
4.7
/ 5
Category Rank
581
/ 2758
#581 in Power Amplifiers
Price vs Category Average
-37%
Below average
Power Output
40
/ Wpc
Who it's for
- Discerning audiophiles prioritizing absolute sonic purity and realism
- Music enthusiasts seeking tube character without sacrificing accuracy or dynamics
- Practical audiophiles valuing long-term component health and lower operational costs
Who should skip it
- Budget-conscious consumers or those new to high-fidelity audio
- Listeners with inefficient speakers or expansive listening rooms
- Traditional tube amp aficionados or those preferring a colored sound
Performance breakdown
Sonic Transparency
The ZOTL circuit delivers exceptional clarity and detail without transformer coloration.
Maintenance Simplicity
Self-biasing tubes and extended lifespan make this remarkably low-maintenance for tube gear.
Versatility
Functions seamlessly as a standalone power amp or integrated with volume control.
Build Efficiency
Lightweight design defies traditional heavy-duty amplifier expectations without sacrificing performance.
Power Scalability
Bridging capability offers a useful power boost for more demanding speaker setups.
Global Compatibility
Universal power supply ensures consistent performance regardless of local electrical standards.
Key Specs
Power Output
40Wpc
Bridged Power Output
Approx. 70W as monoblock
Input Tubes
12AX7, 12AU7
Output Tubes
EL34 or KT77
Tube Life Expectancy
10-20 years
Input Impedance
50k Ohms
Dimensions
9"W by 8.5"H by 14.5"D
Weight
9.7 pounds
Know before you buy
The ZOTL circuit, designed by David Berning, eliminates the need for traditional output transformers. By removing these components, the amplifier avoids the phase shifts and frequency limitations often associated with transformers, resulting in a cleaner, more transparent sound that retains the warmth of tubes.
Yes, the ZOTL40 Mk.II includes a built-in volume control, allowing you to connect a source component directly to the amplifier. This makes it a versatile option if you want to simplify your system or prefer a minimalist setup.
Maintenance is straightforward because the ZOTL40 Mk.II features self-biasing output tubes. You do not need to manually adjust bias settings when replacing tubes, and the design is optimized for long tube life, typically lasting between 10 and 20 years.
With 40 watts per channel, the ZOTL40 Mk.II is well-suited for most high-efficiency and medium-sensitivity speakers. If you require more power, the unit can be bridged to function as a monoblock, increasing the output to approximately 70 watts.
The universal power supply is designed to automatically adjust to any AC voltage between 100V and 240V without compromising performance. This ensures consistent, reliable operation regardless of where you are located.
The amplifier is designed to use either EL34 or KT77 output tubes. These are widely available, allowing you to experiment with different tube brands to slightly tailor the sound profile to your preference.
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$5800