The AV301 is a surround sound radio receiver made by Emerson Radio (Emerson). It has a Dolby Digital (5.1) and a Dolby Pro Logic (4.0) decoder. The Dolby Digital decoder is only engaged when a DVD mixed in Dolby Digital is in the drive. The ProLogic decoder can be used in radio mode or for the auxiliary inputs. It can also operate in standard stereo two-channel for radio and auxiliary. ProLogic is lossy and indiscrete which would be a probable cause of preferring to listen in 2.1 stereo for those functions. For mp3 CDs, a three-stereo option is also available. The speakers are rated at 30 watts each and the 50 watt active subwoofer with a 5.25-inch driver. The sound level of each speaker can be adjusted individually. The power consumption of the unit is 250 watts, not including the subwoofer, which, being active, is plugged in separately.
The unique thing about this model is that the DVD drive is connected through the same four-pin power supply and 40-pin ribbon cable that computer CD and DVD-ROMs use. This allows replacement of the DVD drive with any DVD-ROM drive of sufficient speed from a computer.
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