{"product_id":"radial-j-4-stereo-line-driver-di-box","title":"Radial J+4 Stereo Line Driver DI Box","description":"\u003cp\u003eThe J+4™ is a stereo interface designed to accept unbalanced low output devices such as instruments, computers or mobile devices and boost their signal to a balanced +4dB level for connection to professional audio recording and playback equipment.\u003c\/p\u003e\n\u003ch2\u003eFEATURES\u003c\/h2\u003e\u003chr\u003e\n\u003cul\u003e\n\u003cli\u003eStereo preamp boost signals to +4dB balanced line level\u003c\/li\u003e\n\u003cli\u003eIncreases gain for low output instruments \u0026amp; music players\u003c\/li\u003e\n\u003cli\u003eTransformer isolated to eliminate noise caused by ground loops\u003c\/li\u003e\n\u003cli\u003eMultiple input connector options to interface with any device\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBoost \u0026amp; balance any stereo signal\u003c\/h3\u003e\n\u003cp\u003eThe J+4 allows you to boost nearly any stereo signal up to a +4dB balanced line level output, which can be sent over long distances without signal loss and connected directly to pro audio equipment such as mixers or recording interfaces. Multiple input connectors are available for integration with a variety of devices, including a stacked set of ¼\" jacks for DJ mixers or keyboards, RCAs for CD players and a mini 3.5mm jack for smartphones and tablets. The J+4 delivers exceptional sonic performance, and is able to provide clean gain and eliminate noise by combining the advantages of active signal buffering with transformer isolation.\u003c\/p\u003e\n\u003ch2\u003eAPPLICATIONS\u003c\/h2\u003e\u003chr\u003e\n\u003ch3\u003eUsing the J+4 to boost a stereo signal\u003c\/h3\u003e\n\u003cp\u003eIncreasing the output from a CD player to a +4dB balanced signal is easy. Just plug into the RCA inputs, adjust the volume level and the J+4 does all the work. Transformer isolation eliminates ground loops for quiet performance every time.\u003c\/p\u003e\n\u003ch3\u003eUsing the J+4 with your computer\u003c\/h3\u003e\n\u003cp\u003eToday, computers and laptops are being used in all types of audio-visual systems. The J+4 makes it easy to interface with a built-in 3.5mm (1\/8\") TRS jack. Plug in and the J+4 will boost and balance the signal and deliver a professional line level signal.\u003c\/p\u003e\n\u003ch3\u003eUsing the J+4 with a keyboard\u003c\/h3\u003e\n\u003cp\u003eMany keyboards and synthesizers do not have enough output to effectively drive the line level input on a mixer. This is particularly troublesome on older keyboards such as a Rhodes piano. The J+4 makes it easy with built-in ¼\" inputs and balanced XLR outs.\u003c\/p\u003e\n\u003ch2\u003eSPECIFICATIONS\u003c\/h2\u003e\u003chr\u003e\n\u003cp\u003eThe Radial J+4 is a stereo preamplifier designed to boost unbalanced instruments and consumer level signals and bring them up to a professional +4dB balanced line level. Careful attention has been paid to delivering quality audio while incorporating transformer isolation for added noise suppression. The J+4 delivers a performance that is as good or better than devices costing many times more.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAudio circuit type: Active -10dB ~ +4dB line converter, transformer isolated\u003c\/li\u003e\n\u003cli\u003eNumber of channels: 2\u003c\/li\u003e\n\u003cli\u003eFrequency response: 20Hz ~ 20KHz (± 2dB)\u003c\/li\u003e\n\u003cli\u003eDynamic range: 102dB\u003c\/li\u003e\n\u003cli\u003eTotal harmonic distortion: 0.004% @ 1kHz, +10dBu output\u003c\/li\u003e\n\u003cli\u003ePhase Deviation: 0.5° @ 100Hz; 4° @ 20Hz\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 10k Ohms, unbalanced\u003c\/li\u003e\n\u003cli\u003eOutput Impedance: 1.6k Ohms, balanced\u003c\/li\u003e\n\u003cli\u003eMaximum Input: +17dBu @ 1kHz, 1% THD+N\u003c\/li\u003e\n\u003cli\u003eMaximum Output: +15dBu @ 1kHz, 1% THD+N\u003c\/li\u003e\n\u003cli\u003eGround lift, HPF, Level Control\u003c\/li\u003e\n\u003cli\u003eInput Connectors: 1\/4\", RCA, 3.5mm\u003c\/li\u003e\n\u003cli\u003eOutput Connectors: XLR\u003c\/li\u003e\n\u003cli\u003eConstruction: 14-gauge steel\u003c\/li\u003e\n\u003cli\u003eSize (L x W x D): 84 x 127 x 48mm (3.3\" x 5.0\" x 2\")\u003c\/li\u003e\n\u003cli\u003eWeight: 0.70 kg (1.55 lbs)\u003c\/li\u003e\n\u003cli\u003eShipping size (L x W x D): 102 x 76 x 165mm (4\" x 3\" x 6.5\")\u003c\/li\u003e\n\u003cli\u003eShipping weight: .87 kg (1.92 lbs)\u003c\/li\u003e\n\u003cli\u003ePower: +15VDC\/400mA adapter Included\u003c\/li\u003e\n\u003cli\u003eConditions: For use in dry locations only between 5°C and 40°C\u003c\/li\u003e\n\u003cli\u003eWarranty: Radial 3-year, transferable\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radial","offers":[{"title":"Default Title","offer_id":50874183942311,"sku":"R800 8015","price":289.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/2249\/files\/5_a40afb81-ac9b-4362-a389-b47030bd4fdd.jpg?v=1781158788","url":"https:\/\/www.bananas.com\/products\/radial-j-4-stereo-line-driver-di-box","provider":"Bananas At Large Inc.® Musical Instruments \u0026 Pro Audio","version":"1.0","type":"link"}