Rupert Neve Designs RNDI-S Stereo Active Transformer Direct Box
Stereo Active Direct Box with Custom Transformers, Discrete Class-A FET Amplifier Circuit, Rugged Steel Chassis,
Ground Lift, 3.5mm Stereo Input Jack, and LED Current Consumption Meter
An expanded two-channel version of our best-selling RNDI, providing massive
tone & headroom for all of your instruments & stereo sources.
The RNDI-S signature sound is the product of custom Rupert Neve Designs transformers and class-A biased, discrete FET amplifiers. The carefully orchestrated union of these two elements is key to the unique response of the RNDI-S, delivering a powerful and vibrant direct sound capable of reproducing the full harmonic depth of basses, guitars, keyboards, acoustic instruments, professional line-level sources and consumer devices with a 3.5mm jack.
With portable, powerful, larger-than-life tone, the RNDI-S is ready to make your stereo or mono direct sources shine.
Active + Passive: The Best of Both Worlds
The RNDI-S and RNDI’s signature sound is the product both of new custom Rupert Neve-designed transformers and class-A biased, discrete FET amplifiers. The carefully orchestrated union of these two elements is key to their unique response.
THE
TRANSFORMERS
The custom transformers provide superior passive isolation while adding musical
harmonics and dimension to the sound. The low impedance, transformer-balanced
output excels 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 unamplified signal may travel
almost 100ft before hitting an amplifier. In other designs, these
high-capacitance lines cause major reductions in high frequencies – not so with
the RNDI.
THE
CLASS-A, DISCRETE FET AMPLIFIERS
The class-A & discrete FET amplifier in the RNDI is powered by 48V phantom,
and creates a very high impedance input of 2M Ohms that ensures consistent
performance with a wide variety of instruments. The class-A design ensures that
zero crossover distortion is added to the signal, which can add upper-order odd
harmonics that are musically dissonant in nature. With the RNDI, the
overwhelming majority of harmonic content is 2nd order (octave) with some 3rd
order present (fifth above octave). These musically relevant harmonics, present
in subtle amounts, actually add to the richness of the original signal. And the
discrete aspect of the RNDI 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
LIFTS
Isolates the
XLR Pin 1 from the instrument input ground.
OUTPUT
Transformer-balanced XLR output. Impedance <40 Ohms. Phantom power to the
RNDI-S is supplied through these connections.
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
LIFTS
Isolates
the XLR Pin 1 from the instrument input ground.
OUTPUT
Transformer-balanced XLR output. Impedance <40 Ohms. Phantom power to the
RNDI-S is supplied through these connections.
SPECIFICATIONS
NOISE
Measured
Output, un-weighted, 22 Hz - 22 kHz, source impedance 150 Ohm.
Better
than -110 dBV
INPUT
IMPEDANCE
Instrument
Setting: 2.2 Meg Ohm
3.5 mm Input: 95 Kilohm
OUTPUT
IMPEDANCE
Less than
40 Ohms
FREQUENCY
RESPONSE
+/- 0.25
dB from 30 Hz - 63 kHz
+/- 1 dB from 12.5 Hz - 120 kHz
-3 dBu @ 5 kHz
MAXIMUM
INPUT LEVEL
Instrument = +20.5 dBu
MAXIMUM
OUTPUT LEVEL
+11.5 dBu output at maximum input level
TOTAL
HARMONIC DISTORTION AND NOISE
@ 1 kHz,
-20 dBu Input Level, no load : 0.009% Typical (2nd and 3rd Harmonic)
@ 1 kHz, +20 dBu Input Level, no load : 0.35% Typical (2nd and 3rd Harmonic)
@ 20 Hz, -20 dBu Input Level, no load : 0.9% Typical (2nd and 3rd Harmonic)
CROSSTALK
@ 10 kHz
Instrument Input: -115 dB
3.5 mm Input: -108 dB
POWER
REQUIREMENTS
Phantom
power, 4.5mA @ +48VDC
WEIGHT
1.5lbs
DIMENSIONS
7” long x
5”wide x 1.75” high
MOUNTING
OPTION
19” Rack Shelf, 4 hole pattern (bottom of unit) for 6-32 machine screws
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Condition | Brand New (New) Brand New items are sold by an authorized dealer or original builder and include all original packaging.Learn more |
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