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The LMI PRIME is a passive analog-to-analog converter.

Feature rich, capable of articulate and expansive sonics, PRIME sails into new waters and approaches for ADC and DAC solutions.

The ultimate audio fixer, this dual space 500 series device implements large-core LMI10 transformers in a special circuit designed to incur musical harmonic characteristics, targeting lows, mids and highs as distinct regions of the audio band.

Each channel utilizes 2 extremely hefty transformers, wired in a special split series/parallel circuit. This allows for parallel signal paths and cross-manipulation of circuit behavior using IMD (Iterative Modeling Design by LMI). PRIME can therefore produce tones that are reminiscent of old-school recording consoles, esoteric microphone preamps, exotic line stages, and so on.

PRIME begins with G.auss which is split into 2 sections, Low and High. Ga.uss divides the global range of behaviors into Low and Mids/High frequencies. This control facilitates how much each of those regions is impacted by the remaining controls the user selects.

PRIME features the gorgeous sounding S.rn (Saturation), E.xp (Exponent) and P.lot (Plot) circuits. Saturation is divided into 3 sections - the master control, the high frequency section labeled (Log/Lin) and the low-frequency section labeled (Rat/Irt).

Additionally, E.xp acts as a low midrange contour that can offer curtailed midrange response (much like a multiband compressor) or an explosive gorgeous midrange behavior that presents an expanded dimension of clarity and activity.

PRIME features a Dynamic section labeled D.yn which can function as a gentle dynamic modifier across the broadband or as a soft limiter for audio using a gorgeous sounding clipper circuit

Because PRIME is capable of both near zero insertion loss and lowered the output before conversion, it is both the ultimate high-fidelity solution to recording to digital or for processing/mixing/mastering a pre-recorded piece of music.
PRIME also features a hardware bypass that can be useful to those users who do not utilize patchbays or do not wish to physically interrupt their cabling.

PRIME is dual mono and each channel is an independent signal path and array of circuitry. 

All controls are via push buttons and this offers the end-user a fast, easily recalled platform for manipulating audio before or after conversion or both.

PRIME features the use of Langston Masingale's EDAC adapter card technology, which offers the user a simplified and easy installation process for a 500 series module. The EDAC adapter connects to a long ribbon cable, the card is then installed into the EDAC slot in the 500 series module, the other end of the ribbon cable then can be attached to the rear socket on the PRIME module. 2 cards and ribbon cables are supplied with PRIME and each individual socket is labeled.

The PRIME quick start guide can be found on the LMI website (

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ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.Learn more
  • PRIME - Analog To Analog Converter
  • UV Print
  • 2023
Made In
  • United States

LMI Transformers and PCBs

Syracuse, NY, United States
Joined Reverb:2022

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