RUPERT NEVE DESIGNS RNDI-8 | 8-channel 1u Active Transformer Direct Interface

RNDI-8

8-Channel Analog DI Interface and Distributor

Capitalizing on the RNDI's reputation as the direct interface of choice for many of the world's most discerning musicians and engineers, the RNDI-8 from Rupert Neve Designs is an 8-channel version of their venerable DI, delivering stunning headroom, extremely wide bandwidth, and fantastic-sounding, discrete, class-A FET input amplifiers with custom-wound, DC-coupled output transformers for optimal accuracy and signal strength over ultralong cable runs. Ideal for professional stage rigs, touring rigs, and studios, the RNDI-8 sports selectable -10 dB pad and +48V phantom power on each channel for feeding its FET input amplifiers as well as 1/4" thru outputs for input amplifiers during live sound reinforcement.

The RNDI-8 is perfect for low-output audio sources with instrument-level signals, such as electric guitar and bass, synthesizers, keyboards, piezo pickups, and more, and the 2-megohm discrete FET inputs with their massive +21 dBu headroom perform with immense consistency across a wide variety of sources, including professional line-level signals. The rugged 1 RU steel chassis features an industrial-grade powder coating, allowing it to withstand the intense stresses of life on the road, and you can optionally use the included bolt-on rack ears for either standard rack mounting, or in a reverse position, providing multiple mounting options for most rig setups.

Eight Custom Neve-Designed Transformers

The RNDI-8's custom-wound output transformers provide isolation while adding musical harmonics and dimension to the sound. The low-impedance, transformer-balanced outputs excel at driving long cable runs, and the performance is consistent regardless of the connected equipment. This is important for both live and studio environments where the unamplified signal may travel 100' or more before hitting an amplifier.

Class-A, Discrete FET Input Amplifiers

The class-A and discrete FET input amplifiers in the RNDI-8 are powered by 48V phantom power and create a high-impedance input of over 2 megohms, ensuring consistent performance with a wide variety of instruments. The class-A design eliminates crossover distortion that can otherwise be added to the signal and introduce unwanted upper-order odd harmonics.

With the RNDI-8, the harmonic content is derived from the octave (2nd order) and fifth above octave (3rd order) relative to the fundamental. These musically relevant harmonics, present in subtle amounts, enhance the richness of the original signal and provide a distinctly musical response. Furthermore, the discrete aspect of the RNDI-8’s design means there are no ICs or digital components to potentially cause negative effects on the tone.

Giant Headroom, Wide Bandwidth

The RNDI-8 has a uniquely wide bandwidth with a frequency response stretching from 5 Hz all the way past 90 kHz. However, measurements are only part of the equation: couple this extended bandwidth with the output transformer's harmonic enhancement, and an absolutely thunderous low end emerges, adding an unparalleled feeling of depth.

All this happens without compromising any of the midrange richness or top-end sparkle that defines your instrument. Maximum input level is a massive +21 dBu, making the RNDI-8 capable of handling not only instruments but also professional line-level sources like interfaces and drum machines. And with the addition of a -10 dB pad, that number soars to +31 dBu—more than enough for even the highest-output DJ mixers. This makes the RNDI-8 incredibly versatile, enhancing the sound of nearly any connected instrument or source.

Two Distinct Ground-Lift Options

Most direct interfaces include a ground-lift switch at the output, and the RNDI-8 includes this standard DI lifting option via eight individual Pin 1 Isolate switches on the rear panel. Engaging this button will usually eliminate common sources of hum in the signal path. However, the RNDI-8 also includes eight ground-lift buttons on the front panel, which separate each channel's circuit ground from the chassis ground, providing another helpful option to detect and eliminate unwanted ground hum.

• Dimensions
  • 19 x 8.12 x 1.75" / 48.3 x 20.62 x 4.45 cm
• Weight
  • 9 lb / 4.1 kg