Whirlwind CSR58TNRRP W4 58X0 58 Channel Concert Splitter System Transformers Ground lifts The ultimate in Hand Built 12U concert splitter for the best in performance and sound. Featuring W4 Connectors, TRS1PF Transformers. Ground Lift switches for each microphone. The Whirlwind Concert Series mic splitting systems include the most requested options for splitter boxes and panels for concert audio. Each system is housed in either a heavy-duty steel stage box or an EIA 19" rack panel with back box enclosure. Our Whirlwind MASS Series Multipin connectors speed set-up and tear-down. Microphone inputs are wired directly to one multipin (Main Out) and paralleled or wired through Whirlwind TRSP-1F transformers to a second multipin (Split Out). Each microphone input has a ground-lift switch on the Split Out. This unit can be airmailed , simply call us to upgrade service. Otherwise it ships UPS Ground with Signiture required. Concert 58NR: 58 WC3F female XLR microphone inputs (no returns) Rack Panel - 12-U high: CSR58TNRRP (transformer split, replaceable pin MASS) 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, Avid products, 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.