Saturday, September 11, 2021

REVIEW RNDI DIRECT INTERFACE, DELUXE DIRECT BOX 2021

I’ve been using this direct box since it first came out. I’ve used it with piezo guitar pickups, electric guitar pickups, it’s my goto for electric bass guitar, this D.I. box never sounds bad. 

INPUT SIDE

This is a great Direct Interface, period. It is a low priced product to be wearing the Rupert Neve name but it is a class act in every respect. When I first heard Mr Neve was going to produce a direct box I guessed it would be $800, I was quite shocked when it hit the market and was under $300. I ordered one immediately and it has become my standard of reference.

LIKES

Low noise, sweet sound, high headroom. Works immensely well in a huge variety of circumstances.

Compact smooth steel enclosure. 

The jacks mate smoothly with a variety of connector brands.

LED confirms phantom power is on.

The switch controls are very recessed so you won't hit them accidentally. 

DISLIKES

Pricey

OUTPUT SIDE

EPILOGUE RNDI

Looking for words to describe this direct box reminded me of “laboratory grade” or “military specification”. It is solidly built without being silly. The steel enclosure is much better than aluminum for RF shielding. There are no sharp edges on the enclosure. The face panels and controls are easy to read in dim lighting. 

If you need a high quality direct box that won’t color your sound or load down your guitar pickups the RNDI is an easy choice. 

Enjoy the journey, Good Music To You!

RNDI SPECIFICATIONS

NOISE

Measured Output, un-weighted, 22Hz-22kHz, source impedance 150 Ohm to 10K Ohm.

Better than -110 dBV

INPUT IMPEDANCE
Instrument Setting: 2.2 Meg Ohm

Speaker Setting: 200K Ohm

OUTPUT IMPEDANCE

Less than 40 Ohm

FREQUENCY RESPONSE
+/- 0.25 dB from 25 Hz – 44 kHz

+/- 1 dB from 12.5 Hz – 63 kHz

-3 dBu @ 92 kHz

MAXIMUM INPUT LEVEL 

Instrument = +21 dBu 

Typical Speaker = +41.5 dBu, 92 Vrms (266Vp-p)

MAXIMUM OUTPUT LEVEL 

+11.5 dBu output at maximum input level

TOTAL HARMONIC DISTORTION AND 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
Phantom power, 4.5mA @ +48VDC

WEIGHT
1.5lbs

DIMENSIONS
6.25” long x 4”wide x 1.5” high

This article is ©2021 by Mark King. It’s not ok to copy or quote without written permission.