Tidal Promotional Registration Thanks for joining the Audioengine family! As our thanks to you, we'd like to gift you 3 months of TIDAL hi-res streaming music. Please provide us with the following information, and we will email you a promotional code. * Required First Name * Last Name * Email * Must be a valid email address Your Product's Model Number * A2+ A5+ B1 B2 D1 D2 D3 HD3 HD6 N22 P4 S8 W3 Serial Number * Please enter the serial number of your product. For powered speakers like the A5+ or A2+, this can be found on the back panel of the left speaker. DACs like the D1 and D3 will have the serial number on the bottom of the unit. For the W3 the serial number can be found on the outside of the box.