8 7 6 F 5 4 3 2 SC702 SERIES STEREO A/V DIRECT BOX CONTROLS: Switchcraft® SC702 Series Stereo A/V Direct Boxes convert the outputs of equipment such as MP3 players, laptops and DJ mixers to balanced, mic level signals that can be connected to audio consoles, mic preamps and house sound systems. Two fully shielded isolation transformers galvanically isolate input and output connections, creating a pair of ultra-clean audio signals immune from hum and buzz caused by ground loops and RF interference. INPUTS (1/4", RCA, 3.5mm): Accepts unbalanced stereo signals from headphone outputs and line sources such as laptops and MP3/CD players. Each left and right input is wired in parallel, enabling an unused input to act as a thruput. -20dB PAD (Pushbutton Switch): Reduces output by 20dB for use with hot input signals. Available with custom designed transformers, part number SC702CT, or upgrade to audiophile quality, Jensen transformers, part number SC702. USES: MONO MERGE (Pushbutton Switch) Combines the left and right stereo input signal into a mono signal that is output to both XLRs. STAGE: Connect MP3/CD players, samplers, DJ mixers, guitars, keyboards and other musical instruments to house sound systems and audio consoles. 1/4" INPUTS LEFT & RIGHT XLR OUTPUTS LEFT & RIGHT 4.16 105.7 RCA INPUTS LEFT & RIGHT E LIFT/GND (Toggle Switch): Ground lift switch. Disconnects ground (pin-1) connection between input and isolated output XLRs. Use to break ground loops to further reduce hum & buzz. LECTURES / PRESENTATIONS: Connect laptops and MP3/CD players to house sound systems in conference rooms and auditoriums. 3.35 85.1 F OUTPUTS (Male XLR): Provides separate transformer isolated, balanced mic level outputs for left and right signals. Additional features include a 20dB pad for extra hot input signals, a merge switch to interface with mono sound systems, and a ground lift switch for eliminating grounding issues common with unbalanced equipment. E 1 D D 2.10 53.3 C GROUND LIFT TOGGLE SWITCH 3.5mm (1/8") INPUT STEREO MONO MERGE PUSHBUTTON SWITCH -20dB PAD PUSHBUTTON SWITCH 0.04 1.1 RUBBER STRIPS NOTES: 1. All XLR connectors are wired pin-1 ground, pin-2 hot, and pin-3 cold. 2. Materials: C Housing and end panels Black anodized aluminum Recessed component panels Red anodized aluminum 3. This product is RoHS compliant. B PART NUMBER B TRANSFORMER SC702CT CUSTOM SC702 JENSEN CUSTOMER DRAWING THIS DRAWING DESCRIBES A DESIGN CONSIDERED PROPRIETARY IN NATURE, DEVELOPED AND MANUFACTURED BY SWITCHCRAFT INC. AND IS RELEASED ON A CONFIDENTIAL BASIS FOR IDENTIFICATION PURPOSES ONLY. UNLESS OTHERWISE SPECIFIED WIDTH * * FINISH 1. ALL DIMENSIONS IN INCHES A SIZE - TWO PLACE DECIMALS 0.02 - THREE PLACE DECIMALS 0.005 SPEC No. FIRST USED ON * DATE DRAWN * PRELIMINARY 8 REV * ECO NUMBER * DATE REVISIONS 7 6 5 4 * BY BY 11-15-11 BHM * APVD DO NOT SCALE DRAWING SolidWorks CAD File * NAME C LBS/M * TEMPER * * * MATERIAL * CHKD * * MULT SPEC No. SCALE * A 1:1 APVD * * STEREO A/V DIRECT BOX SHEET PART No. 1 OF SC702 Series 3 REV 02 8 7 6 5 4 3 2 1 F F E E D D C C B B CUSTOMER DRAWING A A SCALE 1:1 DATE DRAWN PRELIMINARY 8 11-15-11 DRAWN BY SHEET PART No. 6 5 4 3 SolidWorks CAD File OF SC702 Series BHM 7 2 C 3 REV 01 8 F 7 6 5 4 3 2 1 F SCHEMATIC FULLY SHIELDED IMPEDANCE MATCHING TRANSFORMER 3.5mm (1/8") STEREO INPUT E LEFT XLR OUTPUT (MIC LEVEL) 2 E 3 1 -20dB PAD 1/4" LEFT INPUT RF FILTER D D MONO MERGE XLR PIN-1 GROUND LIFT (SHOWN LIFTED) 1/4" RIGHT INPUT RF FILTER C RCA INPUTS RIGHT XLR OUTPUT (MIC LEVEL) 1 LEFT (WHITE) C 3 RIGHT (RED) 2 B B FULLY SHIELDED IMPEDANCE MATCHING TRANSFORMER CUSTOMER DRAWING A A SCALE 1:1 DATE DRAWN 11-15-11 PRELIMINARY 8 DRAWN BY SHEET PART No. 6 5 4 3 SolidWorks CAD File OF SC702 Series BHM 7 3 C 3 REV 01