RIE-880 has decent sound quality. Shows average performance across the spectrum. It sounds for me as an unfinished project. It performs good enough for most part, only to be pulled back by lack of clarity at every spectrum. As this is a single DD IEM, with an impedance rating of 60 ohm, it does need more power to sound at full capacity. But even with powerful sources, it doesn't scale much.

Coming back to sound quality, 880 starts off well with good, enjoyable bass performance. Bass has very good quantity and of decent quality. Sub bass has very good slam, making it very enjoyable listen. Bass go deep and has little slower decay. But, as much as it excels in quantity, it suffers in quality. There's graininess in bass and it also bleeds into mids.

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