Ultralinear+ Integrated Amplifier Upgrade Program

LTA is proud to announce the next generation, and first-ever upgrade, of the Ultralinear flagship amp. Introducing, the ZOTL Ultralinear+ Integrated Amplifier.

After trying over two dozen component combinations, and countless hours of listening tests and comparisons, the new ZOTL Ultralinear+ Integrated Amplifier improves the tone and texture across all frequencies, and there is more detail and clarity around the performers.

These sonic upgrades are achieved through adding a massive 100,000µF of additional capacitor storage and changing the resistors in the audio path to non-magnetic Audio Note Tantalum and Holco Metal Film resistors, each type and value specifically chosen for each location.

Stereo subwoofer output has also been added. For those who prefer mono subwoofer output, that can be requested at no additional charge.

What’s Included in the Plus Upgrades

1. 100,000µF of additional capacitor storage

2. Audio Note & Holco resistors

3. Subwoofer Output (Stereo is standard. Mono available by request at no charge)

4. Updated Volume Control w/ Adjustable Gain & “Hi-Res” Settings

5. Custom LTA-branded remote control

Reviews & Testimonials

Review by a UL+ Beta Tester and LTA Customer Mark D.

Happily, LTA is offering owners of the standard UL an opportunity to upgrade. From my perspective, the cost is entirely reasonable given the performance enhancements. As I said at the outset, the standard UL was the best amp I’ve ever heard in my system. Unbelievably, the UL+ makes an even more compelling presentation with better timing, spatial cues, separation of musical lines, bass weight, and tonal realism through the lower midrange. If you have somewhat high efficiency speakers like mine the UL+ is probably as good as it gets for amplification--regardless of price.

I just wanted to let you know that I am on to your trick! You replaced my perfectly good amp with a completely new remarkable one.

The difference is not subtle in any way. I only have about 20 hours on it but in the context of my new speakers and DAC it is better than my old LTA Pre and UL amp separates. I would call it a giant killer.

I feel that I now have an endgame system. My only regret is that I can no longer research and obsess about finding better equipment.

Thanks so much for your great service and generosity. Please also let the techs know how much I appreciate their work.

~ Paul M.

“Plus” Upgrade Listening Notes from LTA’s Director of Sonic Quality

Yes, that is a real job title - some people have all the luck - and along with a cadre of test listeners, it’s their job to make sure the sound of the Ultralinear+ upgrades keep the LTA sound our customers love while raising the bar in the right areas.

Whether you are Sunday morning classical, late night jazz, or sweaty rock club listeners, everything comes out sounding sweet and immersive with the “Plus” version. There is tonal sheen, midrange elegance, and startling, controlled dynamics like never before. The Ultralinear+ upgrades reveal more emotion in the music.

We’ve found that with the “Plus” update, listening fatigue is a footnote of the past, no matter the source. Even the most challenging torture tracks become immediately palatable and better yet, unskippable. When pushing to "live sound" decibels, instruments and vocals stay in place and simply get more vivid and real instead of breaking up or becoming shouty (suggesting the listener be more reasonable with the volume control.)

Whatever your preference, you'll find new appreciation for your all time favorites and fall in love with the latest new releases.

How It Works

1. Place your upgrade order

2. LTA will send you a return shipping label (free shipping for US customers)

3. Pack your amp securely in its original box and packaging (if you don’t have the original packaging, let us know), affix the label, and take it to your closest UPS Store

4. When we receive your amp, we’ll do the upgrades and ship it back to you ASAP after a full week of play-testing and burn-in. We will have your amp for about two weeks, give or take, once it’s received.

5. Enjoy!

Note that due to the additional components required, the Plus upgrades add two inches to the depth (front to back) of all units, making the depth 18” including connectors.