Pricing and availability

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Sweetwater
5.0 (22)
$599.00
Amazon
4.4 (16)
$599.00
Reverb
5.0 (4)
$592.30 New
$499.00 Used
zZounds
5.0 (1)
$599.00
Thomann
4.9 (20)
$618.00 $611.00 $7.00 · All time low
Vintage King
5.0 (3)
$599.00

Average Price: $590

High-end/Boutique

$150

$501+

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Based on price data from 7 merchants for "Rupert Neve Designs RNDI-S Stereo Active Transformer Direct Box". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Elevate your recording and live performance setup with the Rupert Neve Designs RNDI-S Stereo Active Transformer Direct Box, a powerhouse that brings the iconic Neve sound into any musician's toolkit. Engineered with custom Rupert Neve transformers and class-A biased, discrete FET amplifiers, this DI box is a testament to unparalleled sonic fidelity and versatility. Whether you're plugging in a bass, guitar, keyboard, or any other instrument, the RNDI-S ensures you capture every nuance of your performance with clarity and depth.

With its high input headroom of +21.5 dBU, the RNDI-S accommodates professional line-level signals without requiring a pad, making it an ideal choice for studio and live applications. The dual 48V phantom power supply keeps your setup streamlined and efficient, while the ground lift switch per channel eliminates unwanted hum. Built with a rugged steel frame, this DI box is ready for the rigors of the road, ensuring your sound remains consistent and distortion-free across long cable runs.

Key Features:

  • Custom Rupert Neve Designs transformers for rich, powerful tone
  • Discrete FET amplifiers ensure clarity
  • Input headroom of +21.5 dBU
  • Power supply via 48V phantom power
  • Ground lift switch per channel
  • Dual 1/4" instrument inputs and stereo 3.5mm auxiliary input
  • Two 1/4" thruputs and two XLR outputs
  • Rugged steel frame for durability
  • Excellent phase coherence at all frequencies

Product specs

Type Active
Channels Stereo, Dual Mono
Ground Lift Yes
Inputs 2 x 1/4" TRS (instrument), 1 x 1/8" TRS (stereo)
Outputs 2 x 1/4" (thru), 2 x XLR
Power Source 48V Phantom Power
Height 1.75"
Depth 5"
Width 7"

FAQs

What are the main input and output options on the Rupert Neve Designs RNDI-S?

The RNDI-S features two 1/4" TRS inputs for instruments, a 1/8" TRS stereo input, two 1/4" thru outputs, and two XLR outputs, allowing for versatile connectivity with various audio setups.

Does the Rupert Neve Designs RNDI-S require an external power source?

The RNDI-S is powered via 48V phantom power, eliminating the need for an external power supply and making it convenient for use with compatible mixing consoles and audio interfaces.

Is the Rupert Neve Designs RNDI-S suitable for both live and studio applications?

Yes, the RNDI-S is designed for both live and studio use, providing high-quality, reliable performance for instruments like keyboards and basses in various environments.

How does the RNDI-S handle ground loop issues?

The RNDI-S includes a ground lift switch to eliminate hum and noise caused by ground loops, ensuring clean audio signals in your recordings or live performances.

Can the Rupert Neve Designs RNDI-S be used with stereo instruments?

Yes, the RNDI-S is a stereo active direct box, making it ideal for use with stereo instruments such as keyboards, providing balanced outputs for clear and accurate sound reproduction.

Sweetwater

Sweetwater

Rupert Neve Designs RNDI-S Stereo Direct Box Review

Video thumbnail for Rupert Neve Designs RNDI-S Stereo Direct Box Review by Sweetwater

Rupert Neve Designs RNDI-S Stereo Direct Box Review

Sweetwater

Sweetwater

Video thumbnail for Quick Start: RNDI-S Stereo Active Transformer Direct Interface by Rupert Neve

Quick Start: RNDI-S Stereo Active Transformer Direct Interface

Rupert Neve

Rupert Neve

Video thumbnail for Rupert Neve Designs RNDI RNDI-S | Everything You Need To Know by Sam Ash Music

Rupert Neve Designs RNDI RNDI-S | Everything You Need To Know

Sam Ash Music

Sam Ash Music

Video thumbnail for Rupert Neve Designs RNDI-S - NAMM 2018 by Sound On Sound magazine

Rupert Neve Designs RNDI-S - NAMM 2018

Sound On Sound magazine

Sound On Sound magazine

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Rupert Neve Designs RNDI-S Stereo Active Transformer Direct Box.

Use cases and applications

  • The RNDI-S can add a gentle high-end sizzle and clarity to high hats and midrange, enhancing sound quality significantly.

    Source
  • The stereo RNDI-S can effectively record instruments like the Korg Grandstage and provides utility for tracking Volca beats.

    Source
  • It's effective for recording synths like the Korg MS-20M and has been praised by bassists in live sound settings.

    Source
  • Suitable for direct recording of guitar amp heads, contributing to its versatility in various recording setups.

    Source
  • The RNDI-S is suggested for those seeking tonal color, while the Radial is preferred for a straightforward sound representation.

    Source

Features and functionality

  • The RNDI-S is effective for creating upper harmonics that accentuate bass, producing audible sound from inaudible frequencies.

    Source
  • The unit can be used to reamp recorded tracks, adding its characteristic flavor to previously captured audio.

    Source
  • It's highlighted that the RNDI-S cannot run at speaker level, a limitation compared to the mono RNDI models.

    Source

Comparisons

  • The RNDI-S is likened to a hack replacement for RN preamps, offering lush vocal saturation when adjusted properly.

    Source
  • The RNDI-S adds transformer harmonics, differentiating it from Radial JDIs and J48s, which aim for a cleaner sound.

    Source
  • The Radial J48 is frequently recommended as a professional choice over the Neve for most applications, offering clarity without added tonal color.

    Source

Value and pricing

  • Some users feel that while the RNDI-S smooths digital harshness, alternative preamps with good transformers might offer better value.

    Source

User experience

  • Owners find the RNDI-S reveals detail in both high and low ends, enhancing bass performance significantly.

    Source
  • Users indicate that Radial DIs are more commonly used in professional recording studios, including those hosting Grammy-winning artists.

    Source

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