{"product_id":"grace-design-m303","title":"Grace Design m303","description":"\u003cdiv lang=\"en\"\u003e\n\u003cp\u003e\u003cstrong\u003eGrace Design m303\u003c\/strong\u003e is a single-channel, active DI box with full galvanic isolation, a Lundahl transformer and 48 V phantom power, in a rugged extruded aluminium chassis. Grace Design's first dedicated DI box brings the transparency of the m-series preamp signal path to the stage and studio, offering exceptional dynamic headroom and sonic clarity in a compact format accessible to any audio engineer.\u003c\/p\u003e\n\n\u003ch3\u003eGalvanic isolation and a Lundahl transformer\u003c\/h3\u003e\n\u003cp\u003eActive DI boxes without galvanic isolation are susceptible to ground loops and mains interference on a busy stage. The m303 eliminates this at source through full galvanic isolation: no DC current flows between input and output, blocking ground loops before they reach the FOH mixer. A custom, hand-wound Lundahl nickel-core transformer with magnetic shielding delivers the low-end clarity and high-frequency detail that Hugh Robjohns of Sound On Sound described as the best-sounding DI box he had ever heard. The 1 MΩ input impedance is ideal for passive guitar and bass pickups, and a maximum input level of +27 dBu handles even the hottest line-level signals without distortion.\u003c\/p\u003e\n\n\u003ch3\u003eSimple operation on stage and in the studio\u003c\/h3\u003e\n\u003cp\u003eA FOH engineer needs reliability and predictability in demanding stage conditions. The m303 delivers exactly that: a -13 dB pad for loud sources, a ground lift switch to prevent hum, a 1\/4\" thru output to an amp or monitor, and a power LED confirming phantom presence. The quarter-inch extruded aluminium chassis withstands stage conditions, and recessed connectors protect against accidental cable pulls. At just 4 mA of phantom current draw the m303 does not stress mixer channels or interfaces. Available in mono (m303), stereo (m303s) and 8-channel rackmount (m308) versions.\u003c\/p\u003e\n\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eActive single-channel DI box with full galvanic isolation\u003c\/li\u003e\n\u003cli\u003eCustom Lundahl transformer with nickel core and magnetic shielding\u003c\/li\u003e\n\u003cli\u003e48 V phantom power, only 4 mA current draw\u003c\/li\u003e\n\u003cli\u003e1 MΩ input impedance, ideal for passive pickups\u003c\/li\u003e\n\u003cli\u003eMaximum input level +27 dBu with large dynamic headroom\u003c\/li\u003e\n\u003cli\u003e-13 dB pad for loud sources\u003c\/li\u003e\n\u003cli\u003eGround lift (ISO) switch\u003c\/li\u003e\n\u003cli\u003e1\/4\" thru output to amp or monitor\u003c\/li\u003e\n\u003cli\u003eRecessed connectors, power LED, 1\/4\" aluminium chassis\u003c\/li\u003e\n\u003cli\u003eAlso available in stereo (m303s) and 8-channel rackmount (m308) versions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: Grace Design\u003c\/li\u003e\n\u003cli\u003eType: active single-channel DI box with galvanic isolation\u003c\/li\u003e\n\u003cli\u003eInput impedance: 1 MΩ\u003c\/li\u003e\n\u003cli\u003eMaximum input level: +27 dBu\u003c\/li\u003e\n\u003cli\u003ePad: -13 dB\u003c\/li\u003e\n\u003cli\u003eOutput transformer: custom Lundahl, nickel core, magnetic shielding\u003c\/li\u003e\n\u003cli\u003ePower: 48 V phantom, 4 mA draw\u003c\/li\u003e\n\u003cli\u003eInput: 1\/4\" unbalanced jack\u003c\/li\u003e\n\u003cli\u003eDI output: XLR balanced\u003c\/li\u003e\n\u003cli\u003eThru output: 1\/4\" jack\u003c\/li\u003e\n\u003cli\u003eSwitches: -13 dB pad, ground lift \/ ISO\u003c\/li\u003e\n\u003cli\u003eIndicator: power LED (green)\u003c\/li\u003e\n\u003cli\u003eChassis: 1\/4\" extruded aluminium, anodized, cobalt blue\u003c\/li\u003e\n\u003cli\u003eDimensions: 81 x 44 x 134 mm (W x H x D)\u003c\/li\u003e\n\u003cli\u003eWeight: under 0.5 kg\u003c\/li\u003e\n\u003cli\u003eManufacturer warranty: 20-year EON\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Grace Design","offers":[{"title":"Default Title","offer_id":54099998933329,"sku":"55954","price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/GraceDesignm3031.jpg?v=1782232525","url":"https:\/\/wrdtunes.com\/fr\/products\/grace-design-m303","provider":"Wired Tunes","version":"1.0","type":"link"}