I'll let the team here chime in on those Speakers, but in my opinion there are bargains to be had for the careful buyer in the used speaker market.
Spotify is a cool service, but typically has lossy audio down to a bitrate of 160 kbps on desktop,
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or 96 kbps on mobile devices. Their paid service has a “high quality” option of 320 kbps audio on desktop (not really meeting the spec of an Audioholic). I know they are experimenting with Lossless Audio (think CD Quality) but they are not there yet.
IMHO listening to anything less than Lossless Audio is a compromise. Don't get me wrong, lots of folks here (me included) have MP3s (or other lossy formats), but those are usually relegated to the Car (In my case because it doesn't play FLAC Files) or background music - not serious listening.
Like I said above: Of course decent source material is always a consideration as well. But that's a given.
You need decent source material to audition even a cheap pair of speakers. (Did I just quote Billy Joel somewhat...). If you don't have any FLAC (or equivalent) Files, grab a CD that you know reasonably well that has been recorded professionally, from a Thrift store, and try that. It may cost you $2 but the sound should blow you away if you've only listened to regular on line streaming.
Just my 2 cents...
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