Whirlwind ISO2 DUAL Microphone Line Level Isolator and Balancer Made in USA The ISO-2 is a two channel isolation box and line balancer. As an isolation unit, use it to isolate lines to press and video feeds or on-stage power amps. It's a handy hum and buzz fighter for broadcast or live sound applications. As a balancer, it converts unbalanced lines from CD players, tape decks, etc. to balanced for long cable runs. Each channel features: XLR and 1/4" inputs (accepts TRS or TS unbalanced) Ground-lift button Polarity reverse button (Channel 2 only) Whirlwind's own TRSP600L transformers ensure flat frequency response and low distortion. Model #: ISO-2 Frequency Response: 20Hz-20kHz 0.5dB at +10dBm input Maximum Input Level: +28dBm Input Impedance: 600 Ohms Output Impedance: 600 Ohms 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- 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? - International Sales Clearance items, Custom Builds, Road Cases, DT12 items, items identified as non-returnable, discontinued items, used or NOS items, electronic software downloads, demo gear, computer Cards, vacuum tubes, earbuds, harmonicas raw-frame speakers, turntable cartridges, fog fluid