Rupert Neve Designs RNDI-S Stereo Active Transformer DI Box

Not your average DI box, the RNDI-S direct box uses custom RND transformers with Class-A biased, discrete FET amplifiers for a powerful and vibrant sound!

The Rupert Neve Designs RNDI-S has a signature sound which is the product of custom Rupert Neve Designs transformers and class-A biased, discrete FET amplifiers. The carefully orchestrated union of these two elements is key to the unique response of the RNDI-S, delivering a powerful and vibrant direct sound capable of reproducing the full harmonic depth of basses, guitars, keyboards, acoustic instruments, professional line-level sources and consumer devices with a 3.5mm jack.

Hear Switched On's vintage synths through the RNDI-S direct box:


- Custom Rupert Neve Designs transformers for rich, powerful tone
- Exceptional performance with any instrument
- Unrivaled clarity from discrete FET amplifiers
- Drives long lines with minimal loss
- Rugged steel frame built for life on the road
- Powered by dual 48V phantom power
- Excellent phase coherence at all frequencies

- Dimensions (W x D x H): 7"x 5" x 1.75"
- Noise (Measured Output, Un-weighted, Source Impedance 150 ohms, 22Hz - 22kHz ): Better than -110dBV

- Input Impedance:
- Instrument Input: 2.2 Megohm
- 3.5mm Input: 95 Kilohm

- Output Impedance: Less than 40 Ohms

- Frequency Response:
- 30Hz-63KHz: +/- 0.25 dB
- 12Hz-120Khz. +/- 1dB

- Maximum Input Level: +20.5 dBu Typical
- Maximum Output Level: +11.5 dBu Typical
- Total Harmonic Distorion + Noise:
- @ 1 kHz, -20 dBu Input Level, no load : 0.009% Typical (2nd and 3rd Harmonic)
- @ 1 kHz, +20 dBu Input Level, no load : 0.35% Typical (2nd and 3rd Harmonic)
- @ 20 Hz, -20 dBu Input Level, no load : 0.9% Typical (2nd and 3rd Harmonic)

- Crosstalk: @ 10 kHz
- Instrument Input: -115 dB
- 3.5 mm Input: -108 dB

- Power Requirements:
- Phantom Powered: 4.5mA Per Channel @ 48VDC
- 19" Rack Shelf Mounting Option: 4 hole pattern (bottom of unit) for 6-32 machine screws
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 3 lbs
Shipping Dimensions: 10 x 8 x 3 in
Manufacturer Part Number (MPN): RNDI-S

For support or warranty questions, please contact the manufacturer: