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FMR Audio RNP 8380 Really Nice Dual Mic Preamp  

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The RNP 8380 Really Nice Dual Mic Preamp from FMR Audio is a mere 1/3 of one rack unit space in size but is loaded with features and offers lots of headroom, hi-fidelity, and compatibility with the FM... Click To Read More About This Product

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The RNP 8380 Really Nice Dual Mic Preamp from FMR Audio is a mere 1/3 of one rack unit space in size but is loaded with features and offers lots of headroom, hi-fidelity, and compatibility with the FMR RNC and RNLA.

One of the very few bargains you'll ever find in pro audio, FMR Audio gear is used by Grammy-winning engineers Larry Seyer (Asleep At The Wheel, Manhattan Transfer) and Bob Power (Eryka Badhu); platinum producer-engineer Ed Seay (Martina McBride, Melissa Manchester, Ricky Skaggs); and legendary producer-engineer Michael Wagener (Ozzy Osbourne, M¶tley Crœe, Skid Row, Janet Jackson, Megadeth, Alice Cooper).

Lots o' headroom. These days, the trend is for microphones to increase their output signal levels while reducing their output noise levels. This means either employing a front-end pad and/or increasing the headroom of a mic preamp. RNP decided to do the latter: at unity gain, the RNP 8380 has a clip point of +27.5dBu (almost 25Volts peak-to-peak)! Even with a hefty microphone output, the FMR Audio RNP 8380 should take what your mics have to give.

Fidelity. When designing a preamp, there are many ways to balance the sometimes conflicting operating constraints. Unfortunately, with the proliferation of integrated-circuit (IC) based mic preamps in recent years, one of the typical casualties has been fidelity. Fidelity was not sacrificed in the RNP8380. Even though there are many mic pres that are quieter, there are very few that have the spurious-free (i.e., distortion-free) spectrum of the RNP8380 amplifier. Now, more than ever, what you put into a mic preamp is what you'll get out.

Really Nice Compressor (RNC) inserts. Each channel on the RNP8380 has an unbalanced send/receive jack that allow you to connect an RNC 1773 (#580454) using a single Tip-Ring-Sleeve (TRS) cable (per channel). With proper cabling, you could also use this feature to balance any other unbalanced piece of gear. In addition, with the right external configuration, the RNP can provide a separate +22dBu unbalanced output and a +28dBu balanced output simultaneously to allow nifty things like separate M/S decoding while tracking the M/S signal without decoding.

Balanced/unbalanced operation. Both the mic inputs and mic pre outputs are electronically balanced, differential signals. Want to run to/from unbalanced sources? No problem, the RNP automatically adjusts . . . no special cabling required.

Balancing an RNC. Using the above features, you can allow/provide a balanced signal to/from an RNC/RNP set.

Hi-Z DI inputs. These inputs are designed to take a source, such as a passive bass, and not "suck the tone" away from the instrument. This input features a high-impedance unbalanced 1/4" jack.

Slowly-ramping 48V supply. To reduce the chance of destroying mics connected to the RNP that can't tolerate +48V applied to them, RNP ramped up the +48Volts slowly just in case you accidently turn on the phantom supply with a phantom-intolerant microphone attached to the RNP. In addition, this ramp helps reduce "settling time" of the RNP's servos (see Geek Stuff below) and reduces the size of the output pops/clicks.

EMI-resistant. The pre-amp's front end includes a third-order EMI filter. It is specifically designed to attenuate RF while giving a smooth audio performance up to 200kHz. This reduces the chances that you'll have trouble with RF interfering with the RNP's operation even at high-gain levels. When used with a nominal 150 Ohm balanced source, this filter yields exceptional audio performance.

Output mutes. During phantom engagement/disengagement and DI/mic switching, the momentarily mute the output signals to reduce output pops & clicks that may otherwise annoy you and others. This mute actually occurs before the insert send signal, so even devices connected to the insert are spared large pops & clicks.

Stepped gain control. To allow precise gain-setting between multiple channels, RNP uses a Grayhill 12 position switch to set the RNP's gain.

Phase inversion control. This is fairly standard stuff to allow you to accommodate any phase problems due to things like system cabling, etc.

Precision metering. Three LEDs are provided for metering each channel (signal presence, +18dBu and CLIP). In addition, the clip LED trips at 1dB below actual clip and stays on for 3 seconds to make signal-chain troubleshooting easier. The metering is digitally calibrated and driven by the internal microprocessor

Flexible power supply requirements. The RNP will run off of either AC or DC as long as the voltage range is within 9-12V (and has a current capacity of at least 1.5Amps). Polarity of the wallwart connection is unimportant so that you don't have to worry about that detail either. In addition, if you happen to connect a wallwart that doesn't have enough oomph to power the RNP (like the RNC's wallwart), the RNP will tell you by periodically flashing it's front panel LEDs.

Geek stuff. An internal microprocessor provides control and monitoring of many RNP internal activities: power supply operation, source (mic/DI) selection, precision metering, push button control and phantom voltage control. The preamp itself is a unique, full Class A self-biasing-fully differential-DC servoed-transimpedance-100MHz GBP-instrumentation amp with an input impedance of 5k. The RNP's maximum level is +28dBu (differential mode) with an EIN of -120dB. High common-mode impedances help reduce the effect of interfering noise sources. Both phantom coupling caps and gain port voltages are independently servoed.

  • Generous Headroom
  • High Fidelity
  • Really Nice Compressor (RNC) Inserts
  • Balanced/Unbalanced Operation
  • Hi-Z DI Inputs
  • Slowly-ramping 48 supply
  • EMI Resistant
  • Steeped Gain Control
  • Phase Inversion Control
  • Precision Metering
  • Fexible Power Supply Requirements
  • Customer Reviews
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