{"product_id":"royer-ro-rdb22","title":"Royer dBooster2 Two-Channel In-Line Signal Booster and DI","description":"\u003cp\u003eThe Royer dBooster2 (model R-DB22) puts two channels of Royer's dBooster in one box, and each channel also works as a high-impedance DI for guitar and bass. In mic mode a channel adds 12 dB or 20 dB of clean gain to a passive ribbon or dynamic mic, and in DI mode it gives unity gain or 8 dB. It runs on 48 V phantom from your preamp or interface and handles a stereo ribbon pair, two DIs, or one mic and one DI at the same time.\u003c\/p\u003e\n\n\u003ch3\u003eTwo Independent Channels\u003c\/h3\u003e\n\u003cp\u003eEach channel has a combination input that takes an XLR mic cable or a 1\/4-inch instrument cable, its own gain switch and its own balanced XLR output. The channels are electrically isolated from each other, which helps avoid ground loops with a stereo mic such as the SF-12 or with two separate preamps. For a single mic in an electrically noisy room, Royer recommends channel 1.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Works With\u003c\/h3\u003e\n\u003cp\u003eRoyer pairs the dBooster2 with its R-121, R-10 and SF-12 ribbons, and it also brings up dynamic mics such as the Shure SM7B and Electro-Voice RE20. The input blocks phantom power from reaching the mic to protect ribbons, so phantom-powered condenser mics will not work through it. The output is a boosted mic-level signal meant for a mic preamp or interface input.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo independent channels, electrically isolated from each other\u003c\/li\u003e\n  \u003cli\u003eMic mode: 12 dB or 20 dB of gain per channel\u003c\/li\u003e\n  \u003cli\u003eDI mode: 0 dB (unity) or 8 dB of gain per channel for guitar, bass and other Hi-Z sources\u003c\/li\u003e\n  \u003cli\u003eCombination XLR and 1\/4-inch input on each channel\u003c\/li\u003e\n  \u003cli\u003eClass A input stages with ultra-low noise and distortion\u003c\/li\u003e\n  \u003cli\u003eBalanced low-impedance outputs that drive long cables, mic splitters and vintage-style preamps\u003c\/li\u003e\n  \u003cli\u003eBlocks phantom power from the mic to protect ribbons\u003c\/li\u003e\n  \u003cli\u003eDesigned and assembled in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e R-DB22\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGain, mic mode:\u003c\/strong\u003e 12 dB or 20 dB, switchable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGain, DI mode:\u003c\/strong\u003e 0 dB or 8 dB, switchable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 20 Hz to 20 kHz, ±0.25 dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e 0.0015% at 20 dB gain (-25 dBu input), 0.001% at 12 dB gain (-6 dBu input)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIM distortion:\u003c\/strong\u003e Below 0.002% at 20 dB (800 mV output), below 0.005% at 12 dB (2.6 V output)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-noise:\u003c\/strong\u003e Below 11 dBA at 20 dB, below 15 dBA at 12 dB (referred to -48 dB re 1 V\/Pa)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeadroom:\u003c\/strong\u003e 127 dB at 20 dB, 120 dB at 12 dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput impedance, mic mode:\u003c\/strong\u003e 3.6k ohms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput impedance:\u003c\/strong\u003e 300 ohms (20 dB setting)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e 2 x combination XLR and 1\/4-inch (1\/4-inch unbalanced, tip hot)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 2 x balanced XLR (pin 2 hot)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 48 V phantom, about 5 mA idle and 7.5 mA at full output\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 98.4 x 98.4 x 44.5 mm (3.875 x 3.875 x 1.75 in)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 289 g (10.2 oz)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 year, parts and labor\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Royer","offers":[{"title":"Default Title","offer_id":67380206534905,"sku":"RO-RDB22","price":479.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/5766\/1177\/files\/royer-ro-rdb22-1.jpg?v=1792175468","url":"https:\/\/blackoutaudio.com\/products\/royer-ro-rdb22","provider":"Blackout Audio","version":"1.0","type":"link"}