MAM-A (Mitsui DIGITAL-AUDIO WHITE INKJET PRINTABLE 80-Minute CD-R's 50-Pak in Cakebox ARCHIVAL GRADE 80 Minute White Inkjet Printable Digital-Audio CD-R Media. MAM-A brand. These are the media needed for recording on Philips, Pioneer, Harman/Kardon, JVC & Marantz (and others) brands of home CD-Recorders. Known as Digital-Audio, these are the media supported by consumer audio-only cd-to-cd home recorders. These consumer audio-only CD-R discs meet the standards of the Audio Home Recording Act (AHRA) of 1992, which requires a royalty to be paid by the disc manufacturer to the music industry. These CD-R's support the Serial Copy Management System Sold in 50-Disc Cakebox.