Pro Co AV1B Video and Audio Passive Interface Connected to Microphone/PA Systems The ProCo Trade Tools AV1B Audio-Visual Interface allows the line-level outputs of audio and video playback devices, etc., to be connected to microphone inputs of house or portable P.A. systems for programs in school auditoriums, lecture halls, civic meetings and corporate board rooms. The AV1B provides audio interfacing and isolation with wide response and low distortion. Three different types of input connectors?1/4? (6.3mm) T/R/S phone, 2 RCA-type phono, and 3.5mm T/R/S mini jacks ? simplify connection of most equipment. The PAD IN/OUT attenuator switch allows greater flexibility for handling line output sources at either ?hi-fi? -10 dBV or ?professional? +4dBm levels. The DBT-1 transformer provides a floating 150-ohm output with a standard 3-pin male XLRtype connector, so connection to most P.A. system mixers or mixer/amplifiers requires only a standard microphone cable. The GND/LFT switch eliminates hum and buzz from AC ground loops between equipment. For further versatility of operation, there is also a 1/4? (6.3mm) unbalanced line-level output. The AV1B?s construction and components are top-grade throughout, ensuring trouble-free operation in educational, institutional and A/V rental settings. ProCo?s ?Uni-box? enclosure is formed of extruded aluminum side channels and 16-gauge steel top, bottom and end plates and is designed to protect it?s switches and connectors from accidental damage. The use of steel also provides excellent magnetic shielding for the transformer from EMI/RFI fields. The finish is durable black textured powder coat on the end plates and the side channels are black anodized aluminum. Easily readable control and connector identification graphics are incorporated into a durable Lexan overlay on the top panel. The uniquely slotted side channels allow for stacking on top or strapping side-to-side of virtually any number of ProCo TradeTools devices using the Uni-box construction. Features: Better Sound from Computers and DVDs Ideal for Meetings, Lectures and Presentations Output is Transformer-isolated and includes a Ground/Lift Switch Rugged "Uni-Box" Construction for Superior Protection and Shielding Selectable Low-pass ?Hiss? Filter Offers Choice of Standard Connectors?No Adapters Needed Properly Converts Signal Levels from -20 to +40 dBv Echotone Music LLC is an experienced E-commerce Audio Visual Equipment dealer since 1998. We take pride in selling Pro Audio gear for musicians, sound engineers, production companies and broadcast applications. Shipping -Pro packed shipped USPS, UPS or Freight Service. Contact us pay for 2 day air upgrade on any unit. We are working hard to get your product ( built if needed), processed shipped. Processing times vary, 2-30 days Returns/Refunds- If there is truly a manufacturing defect a return tag will be provided. Otherwise customer pays for return shipping. Returned items must be sealed/unopened to qualify for a full refund. Refunds are for the Item cost only. Gear returned with out all its original packaging, accessories or shows signs of wear, is subject to an additional service fee. This item is now used and it would be unfair to resell to another customer as new. What products can not be returned? - Clearance items, Custom Builds, Road Cases, DT12 items, items identified as non-returnable, discontinued items, used or NOS items, electronic software downloads, demo gear, computers, vacuum tubes, earbuds, harmonicas raw-frame speakers, turntable cartridges, fog fluid