The signature sound of the RNDI-S is the result of new Rupert Neve-designed output transformers and class-A, discrete FET input stages. The carefully orchestrated union of these elements is key to the accuracy, tone and response of the RNDI-S.
The custom output transformers provide exceptional isolation while introducing musical harmonics and dimension to the sound. The low impedance, transformer-balanced outputs excel at driving long cable runs, and performance is immensely consistent regardless of the connected equipment. This is very important for both live and studio environments where the audio signal may travel over 100ft before hitting an amplifier.
The class-A, discrete FET input stage in the RNDI-S is powered by 48V phantom, providing a high impedance input of 2.2M Ohms that ensures consistent performance with a wide variety of instruments. The class-A design introduces no crossover distortion to the signal, which can add upper-order odd harmonics that are musically dissonant in nature. With the RNDI-S, the majority of harmonic content is a pleasing combination of 2nd order (octave) and 3rd order (fifth above octave). These musically relevant harmonics, present in subtle amounts, enhance the richness of the original signal and provide a distinctly musical response. And the discrete nature of the RNDI-S design means there are no ICs or digital components that can have negative effects on the tone.
CONTROLS & I/O
2x ¼” INPUTS
Hi-Z unbalanced inputs with 2.2M Ohms input impedance.
2x ¼” THRU JACKS
Parallel ¼” jacks used to send signal to an amp or speaker.
3.5MM INPUT
Stereo unbalanced input with 95 kOhm input impedance. Ch 1 = Tip, Ch 2 = Ring.
INPUT SELECT
Selects ¼” Input or 3.5mm Input.
48V POWER LEDS
Indicates that +48V phantom power is present for each channel from the connected mic preamp(s). Power must be supplied independently to both channels.
GROUND LIFT
Isolates the XLR Pin 1 from the circuit ground for each channel.
OUTPUT
Transformer-balanced XLR output. Impedance <40 Ohms. Phantom power to the RNDI-S is supplied through these connections.
NOISE (22 Hz - 22 kHz, Un-weighted)
Better than -110 dBV
INPUT IMPEDANCE
Instrument Input: 2.2 Megohm
3.5mm Input: 95 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
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
MOUNTING OPTIONS
19” Rack Shelf Mounting Option
4 hole pattern (bottom of unit) for 6-32 machine screws
UNIT DIMENSIONS
5” W x 7” D x 1.75” H
(12.7 cm W x 17.8 cm D x 4.5 cm H)
UNIT WEIGHT
2.5 lbs. (1.1 kg)
SHIPPING DIMENSIONS
10” W x 8” D x 3” H
(25.4 cm W x 20.3 cm D x 7.6 cm H)
SHIPPING WEIGHT
3.5 lbs. (1.6 kg)
