I somehow feel that Aria is better, maybe because to the fit but a close competition with 7Hz Timeless.

The IER Z1R has become one of those community staples and doesn't need much of an introduction or tech specs for that matter. Between these two, I’d pick the IER-Z1R if you can get a fit and don’t bother too much about midrange. The mid-bass is no slouch either (unlike the DF-tuned IEMs around) and snare hits/pedals have superb definition/body. The midrange of the IER-Z1R exhibits a more scooped lower-midrange contrasted to a rise from 1-4kHz that dips in-between. But nowadays, there are much more expensive IEMs coming out of China and other countries which makes me believe that IER-Z1R not only held its ground but also added to its value.

Firstly, I like a fun tuning so the Z1R is right in my ballpark and until yesterday it was the best IEM I had heard. Sound signature wasn’t exactly my favorite but even then I still could enjoy them and appreciate their capability. These IEMs are part of Sony's Signature Series, elevating the high-resolution audio experience to a level where you can truly immerse yourself in the music. There is a certain compression to it, not unlike the Moondrop B2’s bass, with which it sounds like it’s always on full-tilt (make no mistake they sound very different otherwise). Sony designed the drivers in the IER-Z1R headphones from the ground up, to work in total harmony together.

Wired Earphones with a Balanced sound signature presents a precise sound and an enriching listening experience, where sounds are naturally presented without extreme emphasis on any region. This is a hybrid driver system that combines two 12mm dynamic drivers and a single balanced armature. These offer the ultimate convenience, but we believe that if you care about an immersive listening experience and audio quality, these are not for you! This rounded nature of upper-frequency notes help in avoiding listening fatigue but can take away the rawness of crash cymbals. Some people might not have the same success as i did with these, but i reckon after people hear them they're faced with a very difficult choice because of that sweet sweet sound.The combination of Chord Mojo2 and Sony Z1R is a winner in my honest opinion, when it comes to clarity and detail balanced with soundstage and feeling of spaciousness. The timbre of the IER-Z1R’s treble is exceptional, and here, the dynamic driver being used really does shine. This is very slight however, but as a result male vocals and lower female vocals can sound a little distant at times, as if they were placed further back in the stage/mix.