MESM, welcome to the forum!
You ask a very valid question if the BS3 would be "good" enough for a decent Stereo expirience! Before I moved to B&O for various reasons I started my Hifi-life with a Luxman amplifer, Sony ES-CD Player and some nice NAD loudspeakers. For the investment at that point in time I was quite happy the stereo quality. However, as the first dolby suround VHS tapes found the wa into my house I upgraded to one of the first Yamaha suround receiver. Nice, but From my point of very bad stereo performance compared to my Luxman.
A couple of years later, I was tiered of the bad stereo sound in bought the brand new Denon AVC A1 SE as thi was the first one who brought stereo back at a decent quality combined with suround formats.
So the question is, where is the bottleneck for Stereo? Obviously with the amplifier or pre amplifier.
With B&O this game changed as the amplifier is in the laudspeakers and with my Beolab 5 setup even the pre-amplifier is completly out of the way due the direct digital connections from the source (CD) to the loudspeaker.
So for Stereo perfect: worldclass loudspeaker with digital input. The BS3 only comes in for digital suround and other sources.
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BV4-50, Beosystem 3, Beolab 5, Beolab 3, BV3-32, BV1, BS9000, Beolab 4, Beolab 2000, Beo4 Cinema