Most direct interfaces include a ground lift switch at the output, and the RNDI-8 includes this standard DI ‘lifting’ option via eight individual ‘Pin 1 Isolate’ switches on the rear panel. Engaging this button will usually eliminate common sources of hum in the signal path.
However, the RNDI-8 also includes eight ground lift buttons on the front panel which separate each channel’s circuit ground from the chassis ground, providing another helpful option to detect and eliminate unwanted ground hum.
FRONT PANEL
IN
Hi-Z unbalanced input. ZIN = 2.2MΩ
THRU
Parallel ¼” jack that allows the user to pass the input signal directly to an amplifier.
48V
Indicates when +48VDC phantom power is active on the channel.
GND LIFT
Isolates each channel ground from the chassis ground.
-10dB PAD
Attenuates the input signal by -10dB (¼” THRU unaffected).
REAR PANEL
OUTPUT
XLR DI output utilizing custom Rupert Neve Designs transformer. ZOUT < 40Ω
PIN 1 ISOLATE
Isolates XLR Pin 1 output from circuit ground.
FEATURES
Groundbreaking Direct Tone
When class-A, discrete input stages meet Rupert’s custom output transformers, magic happens. The RNDI-8 contains the unique components and design knowledge that make it worthy of the Rupert Neve name.
Huge Headroom
Capable of handling not only instruments, but sources such as synths, keyboards, drum machines and even pre-recorded material. And with the addition of a -10dB pad, the input headroom soars to +30.5dBu – allowing the RNDI-8 to inject that coveted Rupert Neve Designs tone into a wide variety of sources.
Rugged Solid Steel Frame
The rugged steel 1U chassis features an industrial-grade powder coating and is built to withstand the severe stresses of life on the road. The included bolt-on rack ears are reversible for multiple mounting options.
Use With a Variety of Sources
The RNDI-8 has immensely consistent performance across a wide variety of sources due to its 2.2M Ohm discrete FET input stages and high headroom. The RNDI-8 can be used with confidence on guitars, synths, basses, acoustic instruments, keyboards & drum machines. And with the -10dB PAD the input headroom increases even further, providing an easy way to inject the pleasing harmonic content of the RNDI into literally any source.
Drive Longer Lines
The low impedance transformer-coupled outputs – below 40 ohms – are capable of driving long lines while maintaining exceptional high frequency performance.
1/4′′ THRU Outputs
The THRU outputs can be used to feed amplifier inputs for reinforcement.
Ground Lift Options
Pin 1 Isolate switches are provided on the rear panel to help fix any problematic grounding, as well as Ground Lift switches on the front panel to isolate each channel’s circuit ground from chassis ground.
Phantom Powered
Each of the RNDI-8’s eight channels is powered by standard 48V phantom power. Power is indicated by blue LEDs on the front panel, one per channel.
NOISE (22 Hz - 22 kHz, Un-weighted)
Better than -110 dBV
INPUT IMPEDANCE
Instrument Input: 2.2 Megohm
-10dB PAD Engaged: 200 Kilohm
OUTPUT IMPEDANCE
Less than 40 Ohm
FREQUENCY RESPONSE
+/- 0.25 dB from 28 Hz – 60 kHz
+/- 1 dB from 14 Hz – 90 kHz
-3 dBu below 5 Hz
MAXIMUM INPUT LEVEL
Instrument Input: +20.5 dBu (8.2 Volts RMS) Typical
-10 dB PAD Engaged: +30.5 dBu (26 Volts RMS) Typical
MAXIMUM OUTPUT LEVEL
+11.5 dBu Typical
TOTAL HARMONIC DISTORTION + NOISE
@ 1 kHz, +20 dBu input level: 0.25% Typical (2nd and 3rd Harmonic)
@ 1 kHz, -20 dBu input level: 0.015% Typical (2nd and 3rd Harmonic)
@ 20 Hz, -20 dBu input level: 0.75% Typical (2nd and 3rd Harmonic)
POWER REQUIREMENTS
4.5mA Per Channel @ +48VDC
19” RACK MOUNTING OPTION
1RU reversible bolt-on rack ears (included)
UNIT DIMENSIONS
1RU: 19” W x 6” D x 1.75” H
(48.3 cm W x 15.2 cm D x 4.5 cm H)
UNIT WEIGHT
7 lbs. (3.2 kg)
SHIPPING DIMENSIONS
24” W x 13” D x 4” H
(61 cm W x 33 cm D x 10.2 cm H)
SHIPPING WEIGHT
9 lbs. (4.1 kg)
