{"product_id":"rndi-m-active-transformer-direct-interface","title":"Rupert Neve Designs RNDI-M Active Transformer Direct Interface","description":"The RNDI-M delivers the renowned sound of the RNDI, RNDI-S, and RNDI-8 in an even more compact, pedalboard-friendly format. It retains the same custom Rupert Neve Designs transformers and discrete FET input stage while minimizing superfluous features. Its more compact and rugged chassis allows it to integrate perfectly into any environment, offering more musicians and sound engineers the full power and sonic vitality of a Rupert Neve Designs DI.\n\nOverview\nThe RNDI-M generates a balanced signal for electric guitars and basses, synthesizers, keyboards, piezo pickups, or any other instrument-level source. The discrete Class A circuitry, built around Mr. Rupert Neve’s custom transformers, ensures exceptional sonic performance and an extraordinarily natural sound. The frequency response extends from below 5Hz to well over 90kHz. It can handle input levels up to +20.5dBu, while the transformer-coupled low-impedance output allows for driving long cable runs with minimal loss. The robust steel chassis is designed to withstand intensive use on stage and in the studio.\n\nSignature sound\nThe characteristic sound of the RNDI-M derives primarily from the custom Rupert Neve Designs transformer and the discrete Class A FET input stage. The perfect combination of these two elements is the key to the RNDI-M's unique precision, tone, and response.\n\nCustom transformer\nThe RNDI-M’s custom transformer ensures exceptional passive isolation and adds musical harmonics and depth to the sound. The low-impedance balanced output excels at driving long cable runs while maintaining consistent performance regardless of the connected equipment. This is fundamental in both live and studio environments, where the audio signal may travel nearly 30 meters before reaching an amplifier.\n\nDiscrete Class A FET amplifier\nThe RNDI-M’s discrete Class A FET input stage is powered by +48V phantom power and features an input impedance of 2.2 Megaohms. It ensures consistent performance with a wide variety of instruments and sources. The Class A design avoids crossover distortion, which could generate dissonant odd-order harmonics. Instead, the RNDI-M generates a harmonic combination predominantly of the 2nd order (octave) and 3rd order (fifth above the octave), enriching the original signal with a distinctive musical character. Furthermore, thanks to the discrete design, there are no integrated circuits (ICs) or digital components that could negatively alter the sound.\n\nWide bandwidth, high headroom\nThe RNDI-M has a flat frequency response within 0.25 dB from 28 Hz to 60 kHz, with a variation of +\/-1 dB up to 90 kHz and a response that extends down to less than 5 Hz. However, the numbers tell only part of the story: the wide bandwidth, combined with the harmonic effect of the output transformer, creates a low-frequency extension that sounds an octave deeper without sacrificing the richness of the mids or the brilliance of the highs.\nThe high input headroom of +20.5 dBu allows the RNDI-M to handle not just instruments, but also synthesizers, keyboards, drum machines, and even pre-recorded material, lending the renowned Rupert Neve Designs timbre to a wide variety of sources.\n\nFEATURES\nRevolutionary direct sound: when discrete Class A amplifiers meet custom Rupert Neve transformers, the result is astonishing.\nGreat Headroom: maximum input level of +20.5 dBu, ideal for instruments, keyboards, drum machines, and pre-recorded material.\nUltra-resistant steel chassis: built to withstand the toughest conditions, both in the studio and live.\nCompatible with multiple sources: thanks to the 2.2M Ohm discrete FET input and high headroom, it is ideal for guitars, synths, basses, acoustic instruments, keyboards, and drum machines.\nCapable of driving long cable runs: transformer-coupled output with impedance under 40 ohms to maintain excellent performance even on long cables.\n1\/4\" THRU output: allows sending the signal to an amplifier without signal degradation.\nGround Lift switch: located on the rear panel to isolate Pin 1 of the XLR output and resolve any ground issues.\nPhantom Power powered: operates on standard +48V phantom power, with a blue LED indicating active power.\n\nTechnical specifications\nNote: All specifications are TYPICAL.\nNoise (22Hz - 22kHz, unweighted): Greater than -110 dBV\nInput Impedance (ZIN): Instrument Input: 2.2 MΩ\nOutput Impedance (ZOUT): Less than 40 Ohms\nMaximum Input Level: Instrument Input: +20.5 dBu (8.2 Volts RMS)\nMaximum Output Level: +11.5 dBu\nFrequency Response: ±0.25 dB: 28 Hz - 60 kHz | ±1 dB: 14 Hz - 90 kHz | -3 dB: Less than 5 Hz\nTotal Harmonic Distortion + Noise (THD+N%):\n@ 1 kHz, +20 dBu input level: 0.25% typical (2nd and 3rd harmonic)\n@ 1 kHz, -20 dBu input level: 0.015% typical (2nd and 3rd harmonic)\n@ 20 Hz, -20 dBu input level: 0.75% typical (2nd and 3rd harmonic)\nPower: Phantom power, 4.5mA @ +48VDC\nWeight and dimensions:\nProduct dimensions (W x D x H): 8.25 cm x 12.1 cm x 4.45 cm\nShipping dimensions (W x D x H): 10.5 cm x 13 cm x 5.1 cm\nShipping weight: 0.57 kg (1.25 lbs)","brand":"Rupert Neve Designs","offers":[{"title":"Default Title","offer_id":55127934927181,"sku":"RNDI-M","price":198.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/0643\/6173\/files\/rndi-m-active-transformer-direct-interface.1.jpg?v=1792488578","url":"https:\/\/musicdelivery.net\/en\/products\/rndi-m-active-transformer-direct-interface","provider":"Music Delivery","version":"1.0","type":"link"}