Whirlwind ISO-8Q 8 Channel TRS Rack mount Line Level isolation Balancer Made in the USA Made with high quality components and transfromers to eliminate hum from interacting gear Sometimes a ground lift isn't enough to do the job. The ISO-8Q is a valuable part of systems where different pieces of gear are connected across long lines. Many of our customers use it to isolate drive lines to on-stage power amps. The perfect hum fighter in field broadcast or live sound applications, the ISO-8 provides eight channels of high-quality line level isolation to eliminate hum and buzz from interacting gear. Unbalanced outputs are an invitation to system noise. The ISO-8Q provides both balancing and isolation to stop noise at the source. Each channel features a ground-lift switch, and our own TRSP600L transformers ensure flat frequency response and low distortion. It's handy to keep an ISO-8Q "in the rack" for emergencies. Frequency Response: 20Hz-20kHz 0.5dB at +10dBm input Maximum Input Level: +28dBm Input Impedance: 600 Ohms Output Impedance: 600 Ohms Echotone Music LLC has been a professional E-commerce Audio Visual Equipment dealer since 1998. We take pride in selling Pro Audio gear for clubs, concert, and broadcast applications. Shipping -Pro packed shipped USPS, UPS or Freight Service. Contact us pay for air mail 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 without 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, raw-frame speakers, turntable cartridges, fog fluid.