RNP8380 Really Nice Preamp Quickstart Guide V0.
IN TRODUCTION Typically, this is where I’m supposed to congratulate you on your choice of buying our Really Nice Preamp, but I’m not going to! I do, however, want to THANK YOU! We appreciate putting your trust and hard-earned cash into one of our products (or at least giving us a shot by demoing them)! Even though we’re very proud of our products, the point of it is to give you the opportunity to make music without excessively draining your bank account nor making excuses for the sonic results! Really Nic
FMR Audio, +1-512-280-6557 www.fmraudio.com 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 micpre outputs are electronically balanced, differential signals. Want to run to/from unbalanced sources? No problem, the RNP “automatically” adjusts...
FMR Audio, +1-512-280-6557 www.fmraudio.com 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).
FMR Audio, +1-512-280-6557 www.fmraudio.com sought-after vintage micpre noise levels are much worse than the RNPs, so in actual use, I concluded that many folks (particularly those “in-the-know”), when a choice must be made, prefer tone to low-noise. Second, even though we have internal versions of the RNP with a “competitive” EIN, we’d have to charge more for the privilege of meeting lab measurements that few actual applications would challenge.
FMR Audio, +1-512-280-6557 www.fmraudio.com Connect The RNP: 1) Connect the Source(s) —The source microphone cabled to the RNP input(s) via a standard XLR mic cable, or an unbalanced Tip-Sleeve 1/4˝ connected from your source(s) to the front panel-mounted Direct-Inject (DI) input jack. Remember, when the DI jacks are used, the mic input XLR is disconnected from the preamp. 2) Connect the Output(s) — The RNP output(s) need to be attached to your destination device.
FMR Audio, +1-512-280-6557 www.fmraudio.com We recommend—although this is not necessary for functionality—that you run the RNP for at least 5 minutes before using it in a critical application. This would allow all of the internal high-impedance circuit to settle closer to their final values and also the RNP’s internal temperature to stabilize.
FMR Audio, +1-512-280-6557 www.fmraudio.
FMR Audio, +1-512-280-6557 www.fmraudio.com Figure 2: RNP Rear Panel Connections 2 Insert Insert Tip = Snd Ring = Rcv Out GUZINTAS 1 Control # RNPQuickstartV050 Mic B A CAUTION RISK OF ELECTRIC SHOCK. DO NOT OPEN! Power 9V-12V ≥1.5A Out Tip = Ring = Mic A ! + - GUZOUTAS Only use power supply provided with unit! B FMR Audio www.fmraudio.com 4 3 Control Description 1 XLR female mic inputs, pin #2 hot 2 Insert jacks, 1/4”, tip send, ring receive 3 2.
FMR Audio, +1-512-280-6557 www.fmraudio.com Figure 3: RNP Block Diagram Channel 1 (Ch. 2 is identical) "Insert" "HiZ Input" (Tip = Send, Ring = Return) "Gain" Switch & Resistors "Source" "Mic Input" "Output" EMI & Over-V Protection (Tip = +, Ring = -) Preamp/ Servos Over-V Protection Ø + "Mute" "Invert" "+48V Engage" +48V Driver ±18V "Power" EMI, Over-V & Polarity Protection +50V CPU & Signal Conditioners Logic Meter & Switches SI GNAL FL 01/09/02 Rev.
FMR Audio, +1-512-280-6557 www.fmraudio.com provided at this point is over voltage protection to keep transients from unnecessarily stressing the preamplifier’s front end. SOURCE SELECTION — A relay is provided to switch between either the DI (Hi-Z) input or the mic input. This selection is done by the microprocessor by monitoring the presence/absence of a plug inserted into the “Hi-Z” jack. When a plug is inserted, the source relay switches to the DI input, otherwise, the mic input is selected.
