Art Pdb4 4-Channel Passive Direct Box PDB4 Passive Direct Box. The PDB4 is a four channel passive direct box that features four fully transformer isolated direct boxes in a 1U 19-inch rack mount chassis. The inputs and outputs of each of the four channels are isolated to maximize channel separation, and transformer isolation on each output helps to eliminate system ground loops. It is a rock solid, roadworthy interface that is ideal for connecting outputs of electronic musical instruments (or other audio sources) to the balanced inputs of mixer consoles and other balanced audio products. The PDB4 also allows connection of a music source to an instrument amplifier while simultaneously patching it to a mixer. Product Features Four Fully Isolated Channels Switchable Input Attenuation 50k Ohm Instrument/Line Input 50k Ohm Parallel Link Jack 600 Ohm XLR Output Jack Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!