The original reason for choosing 128 kbps was as a balance between sound quality, storage capacity, and users bandwidth - modem use was still widespread back then.
Having had a quick think about it, I have now raised RKO's minimum bitrate to 192 kbps, effective immediately.
( For those interested in numbers: Of the last 172 tracks published on RKO since January 2011, only 24 have been below 192 kbps, with only 9 of those being encoded at 128 kbps. So it hasn't really been an issue as such in a long time.
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