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With a Rupert Neve-designed transformer and a class-A biased discrete FET amplifier, the RNDI elegantly balances any instrument signal - whether straight from a bass guitar or from a screaming 100w amp.

RNDI's unique response delivers a powerful and vibrant direct sound capable of reproducing the full harmonic depth of basses, guitars, acoustic instruments, and professional line level sources. With portable, powerful, larger-than-life tone for your instrument and amplifier signals, the RNDI is truly the first standalone DI worthy of the Rupert Neve name.


• Groundbreaking Direct Tone - where class-A, discrete amplifiers meet Rupert's custom transformers.

• Huge Headroom - the high input headroom of +21.5dBU is capable of handling professional, line level sources without a pad and in speaker mode, the RNDI can handle the full output of a 1000-watt power amplifier (92 Vrms or 266Vp-p).

• Rugged Solid-Steel chassis features an industrial-grade powder coating, and is built to withstand the severe stresses of life on the road.

• Takes All Kinds - the RNDI has immensely consistent performance across a wide variety of sources due to its 2M Ohm discrete FET input and high headroom. In instrument mode, you can even connect a professional line level interface output to "Re-Preamp" a previously recorded source.

• Drive Longer Lines - the low impedance transformer coupled output below 50 ohms is capable of driving long lines with unrivaled high frequency performance.

• 1/4" THRU Output - In instrument mode the THRU output can feed the amplifier input for reinforcement. In speaker mode, the THRU is used to feed the amplified signal to the speaker.

• Best in Class Phase Coherence - excellent at all frequencies, which keeps the sound well-balanced and natural, and is especially vital when blending the direct signal with a microphone capture of the same source.

• Ground Lift switch on the back helps fix any problematic grounding.

• Phantom Powered. 


Noise: Measured Output, un-weighted, 22Hz-22kHz, source impedance 150 Ohms to 10K Ohms - Better than -110dBV
Input Impedance:
- Instrument Setting: 2.2 Meg Ohm
- Speaker Setting: 200k Ohm
Output Impedance: Less than 40 Ohms
Frequency Response:
+/- 0.25dB from 25Hz 44kHz
+/- 1dB from 12.5Hz 63kHz 
-3dBu @ 92kHz
Maximum Input Level: Instrument = +21dBu Typical Speaker = +41.5dBu, 92 Vrms (266Vp-p)
Maximum Output Level: +11.5dBu output at maximum input level
Total Harmonic Distortion plus Noise:

@ 1kHz, +20dBu input level: 0.25% Typical (2nd and 3rd harmonic)
@ 1kHz, -20dBu input level : 0.015% Typical (2nd and 3rd harmonic)
@ 20Hz, -20dBu input level : 0.75% Typical (2nd and 3rd harmonic)

Power Requirements: Phantom power, 4.5mA @ +48VDC
Weight: 1.5lbs
Dimensions: 6.25" long x 4" wide x 1.5" high

Rupert Neve Designs RNDI Active Transformer DI

This item is available to order. Contact us for an estimated delivery time.
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