A proprietary power amplifier technology Marantz calls Marantz Rise™ amplification powers all of these drivers. This amplification is based on the highly efficient and sonically superior GaN FET amplifier technology. Gallium Nitride FETS are special devices that operate much faster than standard silicon MOSFETs in most amplifiers. This allows them to switch quickly and to perform with much higher efficiency and fidelity.. Still, for this article, we will say that many experts believe GaN FET devices were the missing link that has now taken class D amplifiers to a higher level than many thought possible. The Horizon speaker gets a 310-watt amplifier section (FTC-rated) with a peak power of 745 watts (not FTC-rated).
Meanwhile, the Grand Horizon gets a full 370 watts (FTC-rated) with a peak power of 860 watts (not FTC-rated). The amplifier is housed in the back of the Horizon speakers, with connections for Stereo RCA in x1, Optical in x1, HDMI eARC x1, and USB-C x1. These connections allow users to plug in a TV with full eARC volume control and connect a digital component to the optical digital connection. Also, with Dolby Atmos decoding built in, your TV and movies will benefit from full Atmos support. USB-C is there for USB music drives, and there are even legacy RCA connections for CD players, tape decks, or a turntable if you use a separate phono preamp (the Horizon speakers do not have a phono preamp built-in).