FMR Audio RNP8380 Really Nice Preamp


picture copyright Runway Pro Audio

picture copyright Runway Pro Audio

picture copyright Runway Pro Audio

picture copyright Runway Pro Audio

 FMR Audio RNP8380 Really Nice Preamp

What It Is

The RNP is a pair of separate mic preamps providing up to 66dB of gain at vanishing low distortion levels in a compact 1/3 rack format. The RNP possesses all the features you'd expect from a professional preamp: accurate signal metering,1MΩ input impedance DI inputs, high input level capability (up to +28dBu input), high capacity phantom power supply, sealed relay switching for invert/phantom functions, gold plated 12-position gain switch, TRS insert between preamp stage and output driver, +28dBu TRS-balanced outputs, 5kΩ differential input impedance on mic input, plus features like output muting during phantom engage/disengage and battery or AC mains operation.

How It Sounds

The RNP was designed with sonic neutrality in mind without sounding clinical or sterile. There's very little coloration with no unexpected frequency response peaks and valleys, across the very wide frequency response (125kHz) at every gain setting. Particularly, there is no variation in the preamp's low frequency response as a function of gain setting. Basically, what you put into the RNP you get out with very little additional effect.

How It's Done

Modern opamps make the design of decent sounding preamps up to 50dB, or so, an almost trivial exercise. It's the last 10 to 15dB that really uncovers the flaws in amplifier design. The RNP's design uses a unique configuration that permits Class-A operation of a discrete transistor pair that almost completely erases the non linear effects of Vbe and emitter bulk resistance that dog traditional preamp circuits. Additionally, special circuitry constantly measures and adjusts circuit parameters to eliminate gain-control path capacitors and avoids costly individual-trimming to achieve low-distortion, high CMRR performance required in commercial audio settings over the life of the preamp!

Main Features

* 2-Channel Mic preamp in 1/3 rack size.

* Pristine Class-A, very low distortion performance (<0.0005%@+10dBu input).

* Pad-less operation up to +28dBu XLR input levels.

* Maximum output level of +28dBu.

* Innovative circuit design.

* Accurate & repeatable gain switch.

* Accurate signal level metering.

* Front-panel unbalanced DI high impedance (>1M Ohm) instrument input on each mic preamp.

* TRS insert jacks facilitate easy patching of external effects w/o interrupting the output connection.

* Balanced input and output.

* Rack-mountable.

* Rugged extruded aluminum and electro-galvanized steel enclosure.

 RNP8380 Manual