That Particular model is strong on Bass
Check the Driver Surrounds carefully before buying, they
normally melt away and this must be 12-13 years old
the Midrange is not bad, slightly colored but not harsh
the is no real treble from this
the perceived treble is really only upper midrange
I have 901 series VI and 301 series IV
Try it and see, if it floats your boat with your kind of
music go for it, modern recordings will be wasted on this
unit ( 501 ) because its resolution is poor but tonality is
quite OK but bassy, if you listen MP3, early recordings
hindi film music, it will sound better than many modern speakers
but check the Woofer surrounds before buying, they are hidden
in this model, I have seen 501 being offered for sale in OLX Mumbai
for 30-35 K because of Bose Name, so I dont think your chances are
good for 15K but you may be lucky, all the best
the best of the old series was 601 Mk11, the woofers can be
checked easily in this and 4 eight inch cones give really
room filling sound, with both 8 inches tuned and ported
at different frequencies, getting a mint pair of these is almost
impossible though
Robert Bose