{"product_id":"ro-04-pro-mic-preamp-0-72db-adjustable-gain-boost-clean-gain","title":"RO-04 Pro Mic Preamp 0~72dB Adjustable Gain Boost - Clean Gain","description":"\u003cp\u003eIn this review of the RO-04 Pro Mic Preamp the bottom line is simple: anyone who records quiet dynamic microphones or wants to add transparent gain to a guitar or bass will find a lot to like. The RO-04 delivers up to \u003cstrong\u003e72dB of clean gain\u003c\/strong\u003e so distant or low-output sources come through clearly, and its low noise floor means those gains do not introduce distracting hiss. It is a practical, well-built unit aimed at podcasters, voiceover artists, and recording musicians who need high gain without color.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh gain range:\u003c\/strong\u003e Up to 72dB of adjustable gain lets low-output dynamic mics like the SM7B reach usable levels without pushing a noisy interface preamp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptionally low noise:\u003c\/strong\u003e With an EIN down to -120dB and still around -100dB at full boost, recordings remain quiet and detailed even at high gain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion:\u003c\/strong\u003e At 0.0035% THD at 1kHz the unit preserves nuance and avoids audible coloration for clean voice and instrument capture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparate inputs:\u003c\/strong\u003e Dedicated high-impedance instrument and mic circuits allow a guitar and a mic to be connected simultaneously with independent gain control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise gain control:\u003c\/strong\u003e An 11-step gain switch with a trim knob provides consistent, predictable adjustments across the range so noise does not spike in the last half of the knob travel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe RO-04 is best for podcasters, streamers, and home studio recordists who use high-impedance dynamic microphones or passive ribbons and need a reliable boost before their interface. Singer-songwriters who track vocals and guitar simultaneously will appreciate the separate mic and Hi-Z inputs and independent controls.\u003c\/p\u003e\n\u003cp\u003eIt is less aimed at users who need a full channel strip with EQ or compression built in; those seeking additional processing or a multi-channel setup should consider an interface or mixer with those onboard features instead.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVery high, clean gain that brings quiet mics to life without obvious added noise.\u003c\/li\u003e\n\u003cli\u003eSolid metal build and tactile controls that customers describe as satisfying and durable.\u003c\/li\u003e\n\u003cli\u003eSeparate mic and instrument circuits for flexible recording setups and true Hi-Z support.\u003c\/li\u003e\n\u003cli\u003eLow distortion for accurate, uncolored capture of voice and instruments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot a channel strip replacement; it focuses on clean gain rather than EQ or dynamics processing.\u003c\/li\u003e\n\u003cli\u003eSingle-channel design may require additional units for multi-mic sessions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRO-04 Pro Mic Preamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Gain\u003c\/td\u003e\n\u003ctd\u003e0~72dB adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEquivalent Input Noise (EIN)\u003c\/td\u003e\n\u003ctd\u003eAs low as -120dB; around -100dB at 72dB gain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Harmonic Distortion\u003c\/td\u003e\n\u003ctd\u003e0.0035% THD at 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eDedicated mic input and Hi-Z instrument input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain Control\u003c\/td\u003e\n\u003ctd\u003e11-step gain switch plus trim control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe RO-04 Pro Mic Preamp is a focused, well-engineered device for anyone who needs substantial, transparent gain for quiet dynamic or ribbon mics and for direct guitar or bass recording. Its combination of very low noise, low distortion, and separate circuits makes it good value for solo recordists, podcasters, and home studios that prioritize clarity over onboard processing.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan it power condenser microphones?\u003c\/strong\u003e\u003cbr\u003eIt provides a 48V option for condenser mics that need phantom power, while still offering dedicated Hi-Z input for instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it noisy at high gain?\u003c\/strong\u003e\u003cbr\u003eNo; the RO-04 maintains a low noise floor with an EIN as low as -120dB and around -100dB even at maximum 72dB gain.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you use it with a guitar and a mic at the same time?\u003c\/strong\u003e\u003cbr\u003eYes, the unit uses separate mic and high-impedance instrument circuits so both can be connected simultaneously with independent gain control.\u003c\/p\u003e","brand":"Rodyweil","offers":[{"title":"Default Title","offer_id":48254519836891,"sku":"B0DZD3XRGJ","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/511v3_NtYLL._AC_SL1200.jpg?v=1778241898","url":"https:\/\/gearmusthave.com\/products\/ro-04-pro-mic-preamp-0-72db-adjustable-gain-boost-clean-gain","provider":"GearMustHave","version":"1.0","type":"link"}