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About the M4
The Marantz MODEL M4 is a four-zone, rack-mountable distribution amplifier designed for multi-room audio distribution. It provides 8 channels of amplification at 100W per channel (8Ω) or 125W (4Ω), with bridge mode capability for up to 200W per channel across four zones. Featuring HEOS built-in, it supports streaming from services like Spotify, Tidal, Amazon Music via AirPlay 2, Spotify Connect, and more. It includes multiple inputs (4x stereo RCA, 2x optical TOSLINK, Ethernet, USB-A) and outputs (4x stereo preouts convertible to 4x mono subwoofers, 4-way binding posts per zone). Additional features include Marantz Musical Digital Filtering (MMDF), adjustable EQ, high/low pass filters, sound modes (Stereo, Direct, Virtual, Dialog Enhancer, Night Mode), TV sound grouping, and rack kit included. Crafted in Shirakawa, Japan, with active cooling. No specific information found on modifications by ModWright LLC; details reflect standard Marantz MODEL M4.
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