The RNDI-8 is a direct interface device that provides instrument direct injection for electric guitar and bass, synthesizer, keyboard, piezo pickup, or any other instrument-level source. It consists of eight independent channels of RNDI Active Transformer Direct Interface in a single rack space. With over 25,000 channels shipped since its launch in 2015, the RNDI is widely used by discerning musicians and engineers for its vibrancy, clarity, and reliability. The RNDI-8 puts eight channels of this beloved circuit into a single rack space, making it the ideal solution for high-end stage rigs, studios, and synth enthusiasts.
The RNDI-8 features custom-designed transformers and class-A, discrete FET input amplifiers, which combine to deliver the device's unique accuracy, tone, and response. The 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.
The class-A and discrete FET input amplifiers in the RNDI-8 are powered by 48V phantom and create a high impedance input of over 2M Ohms, 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, enhancing the richness of the original signal and providing a distinctly musical response. The RNDI-8 has a uniquely wide bandwidth with a frequency response stretching from 5Hz all the way past 90kHz, adding an unparalleled feeling of depth to the sound without compromising any of the midrange richness or top-end sparkle that defines the instrument.
The RNDI-8 has a massive maximum input level of +21dBu (typical), making it capable of handling not only instruments but also professional line-level sources like interfaces and drum machines. The device also features two distinct ground lift options, including a standard DI 'lifting' option via eight individual 'Pin 1 Isolate' switches on the rear panel and 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.
