Marantz AMP 10 vs AMP 20
The central decision is channel count: sixteen matching channels in AMP 10 versus twelve in AMP 20, both designed for modern immersive systems.
AMP 10
Sixteen-channel custom Class D architecture with Marantz HDAM-SA2 and 200 W per channel. It can power a large processor layout from one chassis and offers selectable balanced XLR or RCA inputs.
AMP 20
Twelve-channel custom Class D architecture with Marantz HDAM-SA2 and 200 W per channel. It targets 7.1.4- and 9.1.2-class layouts or systems where separate amplification already handles LCR.
Choose from the completed channel map
Choose AMP 10 when fourteen to sixteen equal channels are required or when spare channels provide useful expansion. Choose AMP 20 when twelve channels close the design neatly and additional unused outputs would add no value.
Do not choose by channel count alone
Verify the processor output count, normal or bridged allocation, speaker impedance, processor gain and whether unusually demanding LCR speakers deserve separate high-current amplification. Both models still require appropriate ventilation and electrical headroom.