Rupert Neve Designs RNDI Active Transformer Direct Interface

Rupert Neve Designs RNDI Active Transformer Direct Interface

The RNDI combines a custom Rupert Neve-designed output transformer with a class-A, discrete FET input stage, delivering a powerful direct sound that captures the full harmonic depth of basses, guitars, acoustic instruments and even pre-recorded material. The transformer provides isolation and musical harmonics, and its low-impedance balanced output drives long cable runs consistently, live and in the studio.

Powered by 48 V phantom, the FET input stage has a 2.2 Mohm impedance and +20.5 dBu of headroom in instrument mode, enough for synths, keyboards and drum machines. In speaker mode it handles the output of a 1000 W solid-state power amplifier, to capture the full tone of an amp before the speaker cabinet. A parallel THRU jack feeds the amplifier or speaker, and a ground lift switch helps eliminate hum.

Key features

• Custom Rupert Neve output transformer, class-A discrete FET input
• Instrument mode: 2.2 Mohm input, +20.5 dBu max input
• Speaker mode: up to +41 dBu, for amplifiers up to 1000 W
• 1/4" input and parallel 1/4" THRU
• Transformer-balanced XLR output, ground lift
• Rugged powder-coated steel chassis, phantom powered

Specifications

• Input impedance: 2.2 Mohm (instrument), 200 kohm (speaker)
• Noise (22 Hz - 22 kHz, unweighted): better than -110 dBV
• Output impedance: less than 40 ohm
• Frequency response: ±0.25 dB from 28 Hz to 60 kHz; ±1 dB from 14 Hz to 90 kHz
• Maximum output level: +11.5 dBu typical
• Power: 48 V phantom, 4.5 mA per channel
• Dimensions: 10.2 x 15.9 x 4.5 cm (W x D x H)
• Weight: 0.45 kg