AI-121 Audio Interface

The AI-121 eliminates unwanted anomalies and artifacts from audio signals transferred between equipment.  Anomalous and intermittent behavior can regularly occur in electronic products.  Equipment manufacturers are concerned, yet are not always able to replicate this behavior, and therefore determine the cause.  The AI-121 isolates and passes on the audio signal, without the artifacts.   The AI-121 stabilizes the electrical connection between line-level components, simultaneously removing unwanted noise. This, in turn, provides a larger, clearer and better defined holographic image, superior focus, and a deep, wide and accurately sized sound-stage. Tonal balance is also stabilized revealing greater purity top to bottom, excellent low-frequency extension and astonishing analog-like liquidity in the midrange.
 
Initially envisioned as a remedy for the "digititis" and inherent lack of smoothness of so many music streamers, rapidly it became apparent that the AI-121 also benefits a wide variety of sources; analog and digital alike: Disc players, DACs, Streamers, Preamps, Phono Preamps, Reel to Reels, Cassette Decks, even between high-end subwoofers and the preamp! Any analog source can be used with the AI-121 to jaw-dropping effect.
 
The AI-121 has multiple uses:
Use in between your DAC and preamp.
Use between your preamp and amplifier.
Use between your DAC and tape machine or R2R deck.
Use before or after your phono section, on a moving coil OR moving magnet! 
 
The AI-121 is line level, so you may find uses we may have not even thought of!
 
Available with standard RCA or XLR connectors
 
Features massively improved sound quality, including:
A true analog lively sound from all your digital sources.
Huge soundstage, extends beyond sides of speakers.
3-dimensional sound, front to back; layered soundstage.
Eliminate unwanted noise
Audibly more detail in the upper AND lower frequencies. 
Improved clarity, space and separation
More nuanced and clearly defined etched sounds
Brings an organic, lifelike analog sound that emotionally connects!
 
SWITCHES:
-HIGH / LOW Switch:   HIGH = +6 dB     LOW = Flat or 0dB
This +6dB switch is useful for many applications including boosting the output of a High Output MC cartridge; or a medium output Moving Iron or Moving Magnet cartridge.  It is basically a 1:2 step-up.
 
-GROUND / LIFT Switch (only in RCA version):  
GROUND connects chassis ground to the – side of RCAs
LIFT disconnects the – side of RCAs from chassis ground
Typically run it with Ground Lifted and no ground wire connected except when used in a phono circuit.  
 
From an audiophile:
 
"We first heard the AI-121 at AXPONA '25 and inserting this small box into the system was like opening a window in a stuffy room. The top end became airy and extended, better defined and vastly smoother. The midrange palpability was visceral, delivering spooky realism to voices and instruments. The bass became tighter, deeper, cleaner, with less overhang and bloat. And that was in an already great sounding system!"
 
SPECIFICATIONS:
-Distortion (THD) @ 1kHz, +0.0dBu = 0.001%
-Response, ref 1 kHz @ 10 Hz = -0.1dBu
-Response, ref 1 kHz @ 20 kHz = +0.05dBu
-Response, ref 1 kHz @ 50 kHz = +0.25dBu
-CMRR (Common Mode Rejection) @ 60 Hz >95dB