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RUPERT NEVE DESIGNS RNDI-8 Eight Channel Direct Interface
2,325.00 €

RUPERT NEVE DESIGNS RNDI-8 Eight Channel Direct Interface

2,325.00 €
Suggested Catalog Price 2,583.00 €

Available on request

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    8 Channel 1U Direct Interface
    '' Legendary tone, unquestionable reliability. Eight channels of the superb-sounding RNDI in one
    rack space. ''

    With over 25,000 channels shipped since its launch in 2015, the RNDI is firmly established as the direct interface of choice for many of the world’s most discerning musicians and engineers. Its custom transformers and discrete FET amplifiers deliver a vibrancy and clarity that captures the full harmonic depth of any source, and its unquestionable reliability has led to its adoption by thousands of touring artists. 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. With the RNDI-8, stunning direct sound doesn’t require extra work – it’s just there.


    • Groundbreaking Direct Tone
    • Huge Headroom
    • Rugged Solid Steel Frame
    • Takes All Kinds
    • Drive Longer Lines
    • 1/4?? THRU Outputs
    • Ground Lift Options
    • Phantom Powered

    The RNDI-8 consists of eight independent channels of RNDI Active Transformer Direct Interface in a
    single rack space, providing instrument direct injection for electric guitar & bass, synthesizer, keyboard,
    piezo pickup, or any other instrument-level source. The discrete, class-A circuit topology is built around
    Mr. Rupert Neve’s custom transformers, resulting in outstanding sonic performance and supremely
    natural sound from 5Hz all the way out to well beyond 90kHz. Each channel can handle input levels up to
    +21dBu (+31dBu with the pad engaged), the low impedance transformer-coupled output drives long lines
    with minimal loss, and the rugged chassis’ steel construction is designed for a lifetime of stage and studio

    Transformer + Discrete FET: The Best of Both Worlds
    The RNDI-8’s signature sound stems from the custom-designed transformers and class-A, discrete FET
    input amplifiers. The carefully designed union of these two elements is key to the RNDI-8’s unique
    accuracy, tone, and response.

    The Eight Custom 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 100ft or more before hitting an

    The Class-A, Discrete FET Input Amplifiers
    The class-A & 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. 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 5Hz all the way
    past 90kHz. 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 +21dBu, 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 -
    10dB pad, that number soars to +31dBu – 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

    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.

    Hi-Z unbalanced input. ZIN = 2.2MΩ
    Parallel 1?4” jack that allows the user to pass the input signal directly to an amplifier.
    Indicates when +48VDC phantom power is active on the channel.
    Isolates each channel ground from the chassis ground.
    -10dB PAD
    Attenuates the input signal by -10dB (1?4” THRU unaffected).

    XLR DI output utilizing custom Rupert Neve Designs transformer. ZOUT < 40Ω
    Isolates XLR Pin 1 output from circuit ground.

    Note: All specifications are typical.
    Input Impedance (ZIN)

    • Instrument Input: 2.2 MΩ
    • -10dB PAD Engaged: 200 kΩ

    Output Impedance (ZOUT)

    • Less than 40 Ohms

    Maximum Input Level @ 1kHz

    • Instrument Input: +21 dBu
    • -10dB PAD Engaged: +31 dBu

    Maximum Output Level @ 1kHz

    • +11 dBu

    Frequency Response (30 ft. output cable, 10k equivalent load)

    • +/- 0.25 dB: 28 Hz - 50 kHz
    • +/- 1 dB: 14 Hz - 90 kHz
    • -3 dB: 5 Hz

    Noise (Measured Output, Un-weighted BW 22Hz - 22kHz, Source Impedance 150 ohms)

    • Better than -110 dBV

    Total Harmonic Distortion + Noise (THD+N%)

    • @ 1 kHz, +20 dBu Input Level: 0.35% Typical (2nd and 3rd Harmonic)
    • @ 1 kHz, -20 dBu Input Level: 0.009% Typical (2nd and 3rd Harmonic)
    • @ 20 Hz, -20 dBu Input Level: 0.9% Typical (2nd and 3rd Harmonic)

    Power Requirements

    • Phantom Powered, 4.5mA Per Channel @ +48VDC

    19” Rack Mounting Option

    • 1RU reversible bolt-on rack ears


    • Product Dimensions (W x D x H): 19” (48.3 cm) x 8.125” (20.63 cm) x 1.75” (4.5 cm)
    • Shipping Dimensions (L x W x H): 24” (61 cm) x 13” (33 cm) x 4” (10.2 cm)
    • Shipping Weight: 9 lbs. (4.1 kg)