Introduction and acknowledgement
The R1 Zenith is the sophomore outing from UK based IEM manufacturer IMR Acoustics, following on from their well received R1 model. The Zenith is a revision of the original rather than a completely different beast, sporting an improved design and some refinements to the unique tuning and porting system that the R1 was built around but keeping the hybrid driver configuration from the earlier model. This may only be an iterative change, but in raw design terms, the Zenith feels about as close to the R1 as a Porsche does to a VW Beetle.
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