User Guide for Rupert Neve Designs models including: RNDI-8, RNDI-8 Eight Channel Active Transformer Direct Interface, Eight Channel Active Transformer Direct Interface, Active Transformer Direct Interface, Direct Interface
Rupert Neve Designs RNDI-8 1RU Eight Channel Active Transformer Direct Interface
The RNDI-8 8-Channel 1U Active Transformer Direct Interface — Rupert Neve Designs
Input Impedance (ZIN). Instrument Input. 2.2 Megohm. -10dB PAD Engaged. 200 Kilohm. Output Impedance (ZOUT). Less than 40 Ohms. Maximum Input Level @ 1kHz.
RNDI-8 Specifications Input Impedance (ZIN) Instrument Input -10dB PAD Engaged Output Impedance (ZOUT) Maximum Input Level @ 1kHz Instrument Input -10dB PAD Engaged Maximum Output Level @ 1kHz Frequency Response (30 ft. output cable, 10k equivalent load) +/- 0.25 dB +/- 1dB -3dB Noise (Measured Output, Un-weighted BW 22Hz - 22kHz, Source Impedance 150 ohms) Total Harmonic Distortion + Noise (THD+N%) @ 1 kHz, +20 dBu Input Level @ 1 kHz, -20 dBu Input Level @ 20 Hz, -20 dBu Input Level 2.2 Megohm 200 Kilohm Less than 40 Ohms +21 dBu +31 dBu +11 dBu 28 Hz - 50 kHz 14 Hz - 90 kHz 5 Hz Better than -110dBV 0.35% Typical (2nd and 3rd Harmonic) 0.009% Typical (2nd and 3rd Harmonic) 0.9% Typical (2nd and 3rd Harmonic) Power Requirements Phantom Powered 19" Rack Mounting Option 4.5mA Per Channel @ +48VDC 1 RU reversible bolt-on rack ears *All specifications are typical RNDI-8 Eight Channel Active Transformer Direct Interface User Guide Front Panel Rear Panel RNDI-8 Overview The RNDI-8 is comprised of eight isolated RNDI channels. It is designed to provide instrument direct injection (electric guitar, bass, keyboard, piezo pickup, etc). The discrete Class-A circuit topology found in the RNDI-8 is based around Mr. Rupert Neve's custom transformers, resulting in outstanding sonic performance. Each channel of the RNDI-8 can handle input levels up to +21dBu without clipping, while the low impedance transformer-coupled output allows the RNDI-8 to drive long lines with minimal loss. The RNDI-8 chassis' steel construction is designed to stand up to the rigors of stage and studio use. Usage Notes Power needs to be supplied independently to each channel of the RNDI-8 by standard 48V Phantom Power via the XLR output connectors. 48V Power Status is indicated by eight independent front panel LEDs. Avoid placing this direct box near strong electromagnetic fields (such as those radiated by power amplifiers) to reduce any chance of picking up noise. If you are experiencing hum on the RNDI-8 outputs, try engaging combinations of GND LIFT (located on the front panel) and PIN 1 ISOLATE (located on the rear panel) as well as ground lifts on other devices in your signal chain. If this doesn't alleviate the issue, remove individual devices to isolate the source of the problem. The RNDI-8 converts the high impedance, instrument level signals to a balanced, low impedance output which can be sent to a separate mic preamp. In addition, the 1/4" THRU jack is available to connect each channel of the RNDI-8 to an amplifier input. To guarantee the best performance, we recommend utilizing the best available cables and mic preamps. User Guide P/N: 775-00038 Rev. AAdobe PDF Library 17.0 Adobe InDesign 18.1 (Macintosh)