Rupert Neve RNDI-M Active Transformer Direct Interface

The RNDI-M provides instrument direct injection for electric guitar & basses, synthesizers, keyboards,piezo pickups, or any other instrument-level source. The discrete, Class-A circuit topology is built around

Mr. Rupert Neves custom transformers, resulting in outstanding sonic performance and strikingly naturalsound from below 5Hz all the way up to well beyond 90kHz. It can handle input levels up to +20.5dBu, thelow impedance, transformer-coupled output stage drives long lines with minimal loss, and the ruggedsteel chassis is designed for a lifetime of stage and studio use.Signature Sound

The RNDI-Ms signature sound is primarily the product of a custom Rupert Neve Designs transformer anda class-A, discrete FET input stage. The carefully orchestrated union of these two elements is key to theRNDI-Ms unique accuracy, tone, and response.

The Custom Transformer

The RNDI-Ms custom-wound output transformer provides exceptional passive isolation while addingmusical harmonics and dimension to the sound. The low impedance, transformer-balanced output excelsat driving long cable runs, and its performance is consistent regardless of the connected equipment. Thisis equally important for both live and studio environments where the audio signal may travel almost 100ftbefore hitting an amplifier.

The Class-A, Discrete FET Amplifier

The class-A, discrete FET input stage in the RNDI-M is powered by external +48V phantom with a highimpedance input of 2.2 Megaohms that ensures consistent performance with a wide variety of instruments& other sources. The class-A design ensures that zero crossover distortion is added to the signal, whichcan add upper-order odd harmonics that are musically dissonant in nature. With the RNDI-M, the majorityof harmonic content is a pleasing combination of 2nd order (octave) and 3rd order (fifth above octave).

These musically relevant harmonics, present in subtle amounts, enhance the richness of the originalsignal and provide a distinctly musical response. Furthermore, the discrete aspect of the RNDI-Ms designmeans there are no ICs or digital components that may cause negative effects on the tone.

Wide Bandwidth, Giant Headroom

The RNDI-M is flat within a quarter dB from 28 Hz to 60 kHz,+/-1 dB up to 90 kHz, with low frequencyresponse all the way down below 5 Hz. However, measurements are only part of the equation: combinethis extended bandwidth with the output transformers harmonic enhancement, and a thunderous low-endemerges that feels an octave deeper than anything else without losing any midrange richness or top-endsparkle.

The RNDI-Ms uniquely high input headroom of +20.5 dBu is capable of handling not only instruments, buta wide variety of sources, such as synths, keyboards, drum machines and even pre-recorded material.This allows the RNDI-M to inject that coveted Rupert Neve Designs tone into a wide variety of sources.