# Sony IER-Z1R vs 7Hz Timeless II: specs and price compared

A sourced, side-by-side comparison of the Sony IER-Z1R (Sony) and 7Hz Timeless II (7Hz) among in ear monitors. 7Hz Timeless II is the cheaper of the two at $229.

## Side by side

| Spec | Sony IER-Z1R | 7Hz Timeless II |
| --- | --- | --- |
| US price | $1999.99 | $229 |
| Brand | Sony | 7Hz |
| Released | 2018 | 2025 |
| Driver type | hybrid | planar-magnetic |
| Driver config | — | single planar |
| Impedance ohms | 40 | 15.2 |
| Sensitivity db mw | 103 | — |
| Frequency response (Hz) | 3-100000 | — |
| Connector type | mmcx | 2pin-0.78mm |
| Cable detachable | Yes | Yes |
| Plug termination | 3.5mm | modular |
| Shell material | zirconium-alloy | — |
| Weight grams | 26 | 5 |

## Key differences

- Driver type: Sony IER-Z1R hybrid vs 7Hz Timeless II planar-magnetic
- Impedance ohms: Sony IER-Z1R 40 vs 7Hz Timeless II 15.2
- Connector type: Sony IER-Z1R mmcx vs 7Hz Timeless II 2pin-0.78mm
- Plug termination: Sony IER-Z1R 3.5mm vs 7Hz Timeless II modular
- Weight grams: Sony IER-Z1R 26 vs 7Hz Timeless II 5

## Sources

- Sony IER-Z1R: https://www.sony.co.in/electronics/hd-headphones/ier-z1r/specifications (sony.co.in, verified 2026-07-11)
- 7Hz Timeless II: https://www.linsoul.com/products/7hz-timeless-ii?currency=USD (linsoul.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/in-ear-monitors/sony-ier-z1r-vs-7hz-timeless-ii/
Cite: Per The Front Desk Review, Sony IER-Z1R ($1999.99) vs 7Hz Timeless II ($229) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/in-ear-monitors/sony-ier-z1r-vs-7hz-timeless-ii/
License: CC BY 4.0.