Rupert Neve Designs RNDI-M Active Transformer DI

The Rupert Neve Designs RNDI-M is a compact, pedalboard-friendly direct input (DI) box that delivers the rich, vibrant tone and pristine clarity that Rupert Neve gear is known for. Built with the same custom transformers and discrete Class A FET circuitry found in the original RNDI, RNDI-S, and RNDI-8, the RNDI-M brings high-end direct tone to a portable, rugged format—perfect for both stage and studio use.

Despite its smaller footprint, the RNDI-M offers massive headroom (+20.5 dBu), an ultra-wide frequency response, and musical harmonic enhancement, making it an essential tool for electric guitar, bass, synthesizers, keyboards, piezo pickups, and more. Whether you’re tracking in the studio or performing live, the RNDI-M ensures your signal is rich, dynamic, and reliable.

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Signature Rupert Neve Sound

At the heart of the RNDI-M is a custom-wound transformer paired with a Class A, discrete FET input stage. This combination delivers unparalleled accuracy and musicality, with subtle yet impactful 2nd and 3rd order harmonic enhancements that add warmth and dimension without distorting the signal.

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Precision Engineering, Versatile Performance

The RNDI-M handles a wide range of input sources with ultra-high impedance (2.2 MΩ) and a low-impedance transformer-balanced output, ideal for driving long cable runs without loss of clarity. Its compact, rugged steel chassis is built for reliability on the road, while a simple ground lift switch and 48V phantom power indicator make it a plug-and-play solution for any rig.

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Key Features

✅ Studio-grade DI in a compact format
✅ Custom Rupert Neve Designs transformer for natural tone and passive isolation
✅ Discrete Class A FET input stage with 2.2 MΩ input impedance
✅ Massive +20.5 dBu input headroom – perfect for instruments, synths, and line-level sources
✅ Low-impedance transformer-balanced output (under 40 ohms) for long cable runs
✅ Wide frequency response: flat from 28 Hz to 60 kHz, ±1 dB up to 90 kHz, with extension below 5 Hz
✅ Ground lift switch to resolve potential grounding issues
✅ 1/4″ THRU jack maintains signal to an amp with zero degradation
✅ Powered via standard 48V phantom power
✅ Blue LED indicator confirms phantom power status

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Specifications

• Type: Active DI Box
• Input Impedance: 2.2 MΩ
• Input Connector: 1/4″ TRS
• Output Connector: Balanced XLR
• Output Impedance: <40 ohms
• Maximum Input Level: +20.5 dBu
• Power Requirement: 48V Phantom Power
• Frequency Response: Flat from 28 Hz to 60 kHz, ±1 dB up to 90 kHz, extended to <5 Hz
• Chassis: Rugged steel
• Dimensions:
  • Width: 3.2 in (8.1 cm)
  • Height: 1.7 in (4.3 cm)
  • Depth: 4.7 in (11.9 cm)
• Weight: 1.2 lb (0.54 kg)