Rupert Neve Designs RNDI-M Active Transformer Direct Injection Box
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The RNDI-M provides instrument direct injection for electric guitar & basses, synthesizers, keyboards, piezo pickups, or any other instrument-level source. The discrete, Class-A circuit topology is built around Mr. Rupert Neves custom transformers, resulting in outstanding sonic performance and strikingly natural sound from below 5Hz all the way up to well beyond 90kHz. It can handle input levels up to +20.5dBu, the low impedance, transformer-coupled output stage drives long lines with minimal loss, and the rugged steel chassis is designed for a lifetime of stage and studio use.
Signature Sound
The RNDI-M's signature sound is primarily the product of a custom Rupert Neve Designs transformer and a class-A, discrete FET input stage. The carefully orchestrated union of these two elements is key to the RNDI-M's unique accuracy, tone, and response.
The Custom Transformer
The RNDI-M's custom-wound output transformer provides exceptional passive isolation while adding musical harmonics and dimension to the sound. The low impedance, transformer-balanced output excels at driving long cable runs, and its performance is consistent regardless of the connected equipment. This is equally important for both live and studio environments where the audio signal may travel almost 100ft before hitting an amplifier.
The Class-A, Discrete FET Amplifier
The class-A, discrete FET input stage in the RNDI-M is powered by external +48V phantom with a high impedance input of 2.2 Megaohms that ensures consistent performance with a wide variety of instruments & other sources. 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-M, 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. Furthermore, the discrete aspect of the RNDI-M's design means there are no ICs or digital components that may cause negative effects on the tone.
Features
Groundbreaking Direct Tone - When class-A, discrete amplifiers meet Rupert's custom transformers, amazing things happen. The RNDI-M contains the unique components and design knowledge that make it worthy of the Rupert Neve name.Huge Headroom - Maximum input level is a massive +20.5dBu, making the RNDI-M capable of handling not only instruments but also keyboards, drum machines and even pre-recorded material.
Rugged Solid Steel Frame - The rugged steel chassis is built to withstand the severe stresses of life on the road.
Use on a Variety of Sources - The RNDI-M has immensely consistent performance across a wide variety of sources due to its 2.2M
Ohm discrete FET input stage and high headroom. The RNDI-M can be used with confidence on guitars,
synths, basses, acoustic instruments, keyboards & drum machines.
Drive Longer Lines - The low impedance transformer coupled output below 40 ohms is capable of driving long lines while maintaining exceptional high frequency performance.
1/4" THRU Output - The THRU output can be used to maintain optimal input level to an amplifier with no signal degradation.
Ground Lift - A Ground Lift switch is provided on the rear panel to isolate Pin 1 on the XLR balanced output from the
circuit ground to help fix any potential grounding issues.
Phantom Powered - The RNDI-M is powered by standard 48V phantom power. Power is indicated by a blue LED on the front panel.
Specifications
Noise (22Hz - 22kHz, Un-weighted): Better than -110dBVInput Impedance (ZIN): Instrument Input: 2.2 MΩ
Output Impedance (ZOUT): Less than 40 Ohms
Maximum Input Level: Instrument Input: +20.5 dBu (8.2 Volts RMS)
Maximum Output Level: +11.5 dBu
Frequency Response: +/- 0.25 dB: 28 Hz - 60 kHz, +/- 1 dB: 14 Hz - 90 kHz -3 dB: Below 5 Hz
Total Harmonic Distortion + Noise (THD+N%): @ 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 Powered, 4.5mA @ +48VDC
Q & A
Reviews
Protect your investment with the Long & McQuade Performance Warranty
A warranty can be a very important factor when making a buying decision. Because repairs can be very expensive in terms of parts and labour costs, manufacturers usually only provide one year limited warranties that generally only cover items that malfunction due to a manufacturer’s defect. With an important purchase such as a musical
instrument or piece of studio gear, however, many people want to have the peace of mind in knowing that their investment will be protected should the product no longer be performing at 100%.
Because of this, Long & McQuade provides our customers with a FREE one-year Performance Warranty on most of our products. The Long & McQuade Performance Warranty supplements the manufacturer’s warranty to ensure that our customers receive complete “no hassle” warranty coverage within their first year.
How does the Long & McQuade Performance Warranty differ from most manufacturers' warranties?
- Performance Guarantee: Normal wear and tear is covered, so your product will be performing as well as the day you purchased it for the entire duration of the coverage. Band and Orchestral Performance Warranty does not include replacing pads or cleaning for woodwind instruments, unless deemed necessary by our repair staff. Ultrasonic cleaning for brass instruments will be provided if deemed necessary by our repair staff, but is not routinely offered under the Performance Warranty.
- Product Replacement: If your product cannot be fixed or costs too much to fix, we will replace it with the equivalent model for no additional charge. If this is not possible, a full refund will be provided.
- No Lemon Policy: Your product will be replaced should the same problem occur multiple times.
- Convenient: Easy drop off and pick up of the product at any Long & McQuade location.
- Guitar Setup: Guitars purchased at Long & McQuade come with 1 free setup, to be redeemed within 1 year for new guitars and 90 days for used guitars.
- Loaners Available: A loaner product may be given while the product is being repaired.
- Power Surge Protection: Your product is covered even if damaged from a power surge.
- Accessory Coverage: Any peripheral devices or accessories that come with your product (i.e. foot pedal, case) are also covered.
- Commercial Use Coverage: Music and recording professionals who purchase gear for “heavy-use” commercial purposes will still be covered.
Long & McQuade reserves the right to restrict the purchase of additional years of Performance Warranty. Used products come with a 3-month Long & McQuade Performance Warranty. Some products (i.e. computers, software, cymbals and other items) are covered only by the manufacturer‘s warranty. Consumables (i.e. strings, reeds, drum sticks, batteries, tubes, cross faders) are excluded as they are designed to be replaced. Cosmetic Damage, Accidental Damage, or problems caused by Humidity or Temperature Issues are not covered. Speakers damaged by overpowering are generally not covered. Our coverage does not provide compensation for loss of use. As of June 2018 the Performance Warranty is no longer transferable. The warranty is only valid in Canada.
Purchasing additional years of coverage
Some manufacturers provide warranties for longer than 1 year; however, these are usually limited warranties that do not provide the same coverage as the Long & McQuade Performance Warranty. Customers interested in more complete and convenient (but not necessarily longer) coverage are still able to purchase additional years of the Performance Warranty.
If you are interested in receiving this coverage for longer than one year, you have the option of purchasing additional years of the Performance Warranty. The pricing is as follows:
- NEW products: Starting at 4% of the current new selling price to double the warranty from 1 year to 2 years. Starting at 4% for each additional year.
- USED products: Starting at 4% of the current new selling price to increase the warranty from 3 months to 1 year. Starting at 4% for each additional year.
- GUITARS: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year. $45 maximum. An additional free setup is not included with additional purchased years of Performance Warranty.
- BAND and ORCHESTRAL instruments: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year.
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| Product | SKU | Qty |
|---|---|---|
| RNDI-M Active Transformer Direct Injection Box | 820930 |
