The Apollo RA670 re-embodies award-winning audio innovation in a new compact form factor.
Sources: AM / FM / Bluetooth / Apple AirPlay 2* / Optical Audio In / USB / AUX / MTP / UPnP* / DAB + Ready (Requires MS-DAB100A) / SiriusXM-Ready (Requires SiriusXM Connect Vehicle Tuner).
Multi-Zone Technology™ : Three independent audio zones are available for a customized listening experience across your vessel, each with advanced localized menu controls including volume limits, zone naming, disabling zones and more.
Internal  Amplifier :  Class-D.
Peak Power :  280W max.
Speaker Channels :  4 x channels, 1 pair per zone (zone 1 & 2 internal amplifier / zone 3 requires external amplification).
RCA Pre-Out :  3 zones (1 x L+R per zone, 1 x Sub per zone – All require external amplification).
Operating Voltage :  +10.8 – 16V dc.
Dimensions :  157mm L x 68mm H x 21mm D [ 6-3/16″ x 2-11/16″ x 7/8″ ].
Mounting  Dimensions :  49mm H x 102mm D [ 1-15/16″ x 4-1/16″ ].

Apollo Marine Stereo MS-RA670