{"product_id":"hum-audio-rp-2-preamp","title":"HUM Audio RP-2 Preamp","description":"\u003cdiv lang=\"en\"\u003e\n  \u003cp\u003e\u003cstrong\u003eHUM Audio RP-2\u003c\/strong\u003e is a two-channel microphone preamplifier with transformer-balanced, fully discrete Class-A circuitry and a dedicated remote controller — HUM Audio's flagship studio preamp, and the direct topological basis for the channel preamps in the N-TROPHY console and N-Closure modules. Built around Jensen JE990 opamps, gain range 20–60 dB. The defining feature is the physical separation of the preamp box from the controller: the two units connect via a single standard XLR cable, allowing the preamp to be positioned close to the microphones — minimizing mic cable run length and associated signal loss — while the controller sits conveniently on the console surface. The gain control circuit uses a four-cell photocell (opto) network — complete electrical separation between the audio path and the control signal, with no mechanical gain-stage influence on the sound at any setting. Hand-assembled in Poland.\u003c\/p\u003e\n\n  \u003ch3\u003ePhotocell gain circuit and passive M\/S matrix\u003c\/h3\u003e\n  \u003cp\u003eUsing photocells (photoelectric cells) for gain control rather than conventional mechanical potentiometers or VCA circuits provides complete electrical isolation between the audio signal and the controller's control circuits — no shared paths that could introduce noise, interference, or sonic degradation at different gain settings. The passive M\/S matrix built into the preamp box uses a transformer with a passive matrix network — the signal can be recorded in encoded M\/S format (directly to two DAW tracks for later matrixing in the box) or decoded stereo (ready L\/R after matrixing inside the preamp), with no active circuits anywhere in the matrix path. Operating modes: Stereo L\/R, M\/S encoded, M\/S decoded, and Dual\/Mono. The Air Boost function is a passive, smooth-sounding high-frequency booster modeled on the HF boost circuitry in Pultec-style processors — adds air and openness without digital edge. HPF at 50 Hz: passive filter at 6 dB\/oct, switchable.\u003c\/p\u003e\n\n  \u003ch3\u003eSignal path architecture and remote controller\u003c\/h3\u003e\n  \u003cp\u003eThe RP-2 signal path is transformer-balanced at both the microphone input and the line output — no electrolytic capacitors in the audio path, extremely short signal route, audiophile-grade selected components throughout, military-spec silver cables. Microphone input impedance of 2 kOhm is optimal for passive ribbon microphones without ribbon damping. Line\/instrument input impedance is 100 kOhm. Maximum output level is +27 dBu, output impedance 600 ohms. THD+N is 0.027% at 60 dB gain. All functions in the remote controller are switched by high-quality relays and Alps potentiometers. The controller draws power through the same XLR cable that connects it to the preamp. Included in the set: preamp box, remote controller, external power supply, custom cables, mic head dust covers, and a flight case. Two-year warranty.\u003c\/p\u003e\n\n  \u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e2-channel microphone preamp — transformer-balanced, fully discrete, Class-A\u003c\/li\u003e\n    \u003cli\u003eJensen JE990-based — same topology as N-TROPHY console and N-Closure modules\u003c\/li\u003e\n    \u003cli\u003ePhysical preamp\/controller separation — preamp near microphones, controller on the work surface\u003c\/li\u003e\n    \u003cli\u003e4-cell photocell (opto) gain circuit — complete electrical isolation of audio path from control signal\u003c\/li\u003e\n    \u003cli\u003eGain range: +20 dB to +60 dB\u003c\/li\u003e\n    \u003cli\u003eOperating modes: Stereo L\/R, M\/S encoded, M\/S decoded, Dual\/Mono\u003c\/li\u003e\n    \u003cli\u003ePassive transformer-based M\/S matrix (no active circuits in the matrix path)\u003c\/li\u003e\n    \u003cli\u003eAir Boost: passive Pultec-style HF booster\u003c\/li\u003e\n    \u003cli\u003eHPF 50 Hz, passive, 6 dB\/oct\u003c\/li\u003e\n    \u003cli\u003ePad: -20 dB\u003c\/li\u003e\n    \u003cli\u003ePhase inversion\u003c\/li\u003e\n    \u003cli\u003ePhantom power: +48V\u003c\/li\u003e\n    \u003cli\u003eMic input impedance: 2 kOhm — optimal for passive ribbon microphones\u003c\/li\u003e\n    \u003cli\u003eLine\/Hi-Z input impedance: 100 kOhm\u003c\/li\u003e\n    \u003cli\u003eMaximum output level: +27 dBu; output impedance: 600 ohms\u003c\/li\u003e\n    \u003cli\u003eNo electrolytic capacitors in the audio path\u003c\/li\u003e\n    \u003cli\u003eAlps potentiometers and relays in controller; controller powered via XLR cable\u003c\/li\u003e\n    \u003cli\u003eIncluded: preamp box, remote controller, external PSU, custom cables, mic head covers, flight case\u003c\/li\u003e\n    \u003cli\u003eHand-assembled in Poland; 2-year warranty\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eType: 2-channel mic preamp, transformer-balanced, discrete, Class-A\u003c\/li\u003e\n    \u003cli\u003eBase opamp: Jensen JE990\u003c\/li\u003e\n    \u003cli\u003eGain control: 4-cell photocell (opto) circuit\u003c\/li\u003e\n    \u003cli\u003eGain range: +20 dB to +60 dB\u003c\/li\u003e\n    \u003cli\u003eInput impedance XLR Mic: 2 kOhm\u003c\/li\u003e\n    \u003cli\u003eInput impedance TRS Line\/Hi-Z: 100 kOhm\u003c\/li\u003e\n    \u003cli\u003eMaximum output level: +27 dBu\u003c\/li\u003e\n    \u003cli\u003eOutput impedance: 600 ohms\u003c\/li\u003e\n    \u003cli\u003eFrequency response: 20 Hz – 50 kHz +\/- 0.4 dB\u003c\/li\u003e\n    \u003cli\u003eTHD+N: 0.027% @ 60 dB gain\u003c\/li\u003e\n    \u003cli\u003ePhantom power: +48V\u003c\/li\u003e\n    \u003cli\u003ePad: -20 dB\u003c\/li\u003e\n    \u003cli\u003eHPF: 50 Hz, 6 dB\/oct, passive\u003c\/li\u003e\n    \u003cli\u003eM\/S matrix: passive, transformer-based\u003c\/li\u003e\n    \u003cli\u003ePreamp–controller connection: 1x standard 3-pin XLR cable\u003c\/li\u003e\n    \u003cli\u003ePreamp connectors: 2x TRS in (gold-plated), 2x XLR Mic in (Neutrik, gold-plated), 2x XLR Line out (Neutrik, gold-plated), 1x XLR Control out\u003c\/li\u003e\n    \u003cli\u003ePreamp dimensions: 355 mm (L incl. sockets) x 144.5 mm (W) x 118 mm (H)\u003c\/li\u003e\n    \u003cli\u003eController dimensions: 123.5 mm (L) x 154 mm (W) x 55–59 mm (H)\u003c\/li\u003e\n    \u003cli\u003eWeight: preamp box 4.4 kg; controller 0.5 kg; full set in flight case 9.9 kg\u003c\/li\u003e\n    \u003cli\u003eWarranty: 2 years\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"HUM Audio","offers":[{"title":"Default Title","offer_id":53745438130513,"sku":"58395","price":4576.56,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/HUMAudioRP-2Preamp1.jpg?v=1778576440","url":"https:\/\/wrdtunes.com\/de-fr\/products\/hum-audio-rp-2-preamp","provider":"Wired Tunes","version":"1.0","type":"link"}