Whirlwind ISO8 8 Channel Rack mount Line Level Audio isolation Balancer no hum American 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-8 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-8 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-8 "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 is an experienced long time E-commerce Audio Musical instrument dealer since 1998. We take pride in selling quality gear for musicians, sound engineers, production companies and broadcast applications. Shipping --Items are well packed and shipped USPS, UPS or Pallet Freight Service. Items purchased on Friday may not ship until Monday or until the projected processing period. We are working hard to get your unit Built ( if needed), processed and shipped. Returns/Refunds- If there is truly a manufacturing defect a return tag will be provided, otherwise customer pays for return shipping costs. Returned items must be sealed/unopened in original, brand-new condition, showing no signs of wear or use such as mount marks, plug marks, scratches, scuffs, dings or scrapes, screw mount marks or collateral material damage.. Items must also include all original packaging, manuals, warrantees accessories or your return may be subject to a return handling charge. Refunds or for the Item cost only. If the item was listed as free shipping then the cost of the shipment will be deducted from the units original cost. Gear returned with out all its original packaging, warranty cards and accessories or that shows signs of wear from use, will be subject to an additional service fee. This item is now used and it would be unfair to resell to another customer as new. The following products cannot be returned - Clearance items, Custom Builds, items identified as non-returnable, discontinued items, used or NOS items, electronic software downloads, demo gear, strings, reeds, computers, tubes, earbuds, earplugs, recorders, harmonicas, raw-frame speakers, drumheads, drumsticks, turntable cartridges, fog fluids, clothing/footwear, cleaners, polishes polishing cloths, software/soundware, books, CDs, DVD's, vinyl records, and videos. Happy customers, that's music to our ears!