Linear Tube Audio Ultralinear Power Amplifier

Linear Tube Audio LTA ZOTL Ultralinear Power Amplifier - Professionally Upgraded to Plus Spec - Very Good Condition

For sale is my LTA ZOTL Ultralinear amplifier that has been professionally upgraded to Plus specification by Linear Tube Audio at their headquarters. This is a special unit that does not have the "+" marking on the faceplate but has received the full Plus upgrade with the additional 100,000µF of capacitor storage and premium Audio Note Tantalum and Holco Metal Film resistors in the audio path.

It also has the original Fern & Roby chassis that is made in the USA and looks incredible.

Read the rave reviews on this fantastic ZOTL power amplifier. It is truly a special accomplishment, with tube refinement, rock solid stability, and low noise. Voices are most lifelike of any amp I’ve ever played. It’s a self-adjusting auto-bias is a no-fuss tube lovers dream. This is a set it and forget it amp. It's in very good well-cared for condition throughout. I am the second owner, but can't find any marks on it.

The Plus upgrade significantly improves tone and texture across all frequencies while providing more detail and clarity around performers. Each resistor type and value was specifically chosen for its location in the circuit after extensive listening tests.

The power amplifier comes complete with the original box. I am happy to ship with all original materials included.

Buyer pays insured ground shipping. Sales to lower 48 US only.

Information below from LTA's website:

The latest amplifier design by David Berning. Striking a balance between triode and pentode mode, the new ZOTL Ultralinear amp provides the unique advantages of each while maintaining all the benefits of the ZOTL circuitry.

The ZOTL Ultralinear amplifier delivers uncolored detail and realism without sacrificing natural mids and powerful, controlled bass. The ZOTL Ultralinear is our most detailed and refined amp. Many listeners compare the presentation to SET amps, while offering much more power.

Listeners enjoy the less forward, distortion-free presentation that is "more pleasing to listen to" the Ultralinear offers.

Plays nicely with others. The ZOTL Ultralinear was specifically designed with high-efficiency speakers in mind. Yet a super-wide frequency response and less than 2 ohm output impedance means it plays nicely with all speakers.

Stereo + mono, at the flip of a switch. The ZOTL Ultralinear outputs 20 watts per channel. Need more power? Like all of our power amplifiers, it can be used as monoblock or stereo amps at the flip of a switch.

Unique tubes, unique amp. The ZOTL Ultralinear uses 17JN6 power tubes, a Compactron-style TV sweep tube that can't be easily used in traditional transformer-coupled amplifier designs. The ZOTL circuit is able to take advantage of these great-sounding, under-utilized, inexpensive, and widely available tubes.

Never buy another set of tubes. Most tube amplifiers run through tubes every 1,000-2,000 hours. That sounds like a lot until you consider that we estimate tube life for our amps to be in the 10,000-20,000 hour range. Why? Because we use ⅓ the current through the tubes, which results in lower heat and dramatically longer tube life.

Tube tone + solid state detail. Traditional tube amps are known for their liquidity and linearity, but their "warmth" masks details and can sound thick. Solid state amplifiers give you that detail, but can be "clinical." ZOTL amplifiers give you the best of both worlds: beautiful tube tone with the clarity of solid state (while being entirely tube-based.)

Looks as good as it sounds. The low-resonance aluminum chassis of the ZOTL Ultralinear amplifier is designed and manufactured in Richmond, Virginia, by the award-winning industrial design crew at Fern & Roby. Sturdy toggle switches and machined aluminum front and rear panels exude quality.

Patented perfection. The ZOTL Ultralinear amplifier is based on David Berning's patented ZOTL technology, the only advance in tube technology since the 1950's. For a technology to be patented, it must be deemed "new, useful, and non-obvious." We think that sums up our approach quite nicely.

Premium components = premium sound. If you use cheap, generic parts, guess what kind of sound you'll get? That's why we use only premium, name-brand components. Belleson regulators. Ohno OCC wiring. Vishay Dale resistors. Mundorf caps. Typically, these are names you'll only hear in amps that cost $10k or more.

Made in the USA. Every LTA product is designed and built by hand in Takoma Park, Maryland, by a group of technicians who are also musicians, audiophiles, and music lovers. Some of whom have been with us since the company's earliest days.

SPECIFICATIONS
Inputs: One pair L & R Cardas RCA
Outputs: One set of stereo WBT speaker binding posts
Amplifier class: Push-pull class AB
Power output: 20 watts channel 8 ohms
Sensitivity: 1.2V RMS for 20 watts output
Frequency response: 8hz to 60khz - +0, -.5db
Output impedance: 1.6 ohms
Input impedance: 50k 100V /
120V / 240V operation: Auto-switching Hum and noise: 94dB below full output (measured between 20Hz-20kHz)
Gain: 21db Stereo/Mono: Switchable Stereo-Mono
Dimensions: 17 inches (43 cm) wide, 5 inches (12.7 cm) tall, 13.875 inches (35.2 cm) deep
Weight: 17.5 lbs or 7.9 kg
Tube complement: Two 12AU7 and two 12AX7 input tubes, four 17JN6 power tubes - Autobias for all tubes. All tubes NOS.