# 7Hz Timeless II vs Etymotic ER4XR: specs and price compared

A sourced, side-by-side comparison of the 7Hz Timeless II (7Hz) and Etymotic ER4XR (Etymotic) among in ear monitors. 7Hz Timeless II is the cheaper of the two at $229.

## Side by side

| Spec | 7Hz Timeless II | Etymotic ER4XR |
| --- | --- | --- |
| US price | $229 | $349 |
| Brand | 7Hz | Etymotic |
| Released | 2025 | 2016 |
| Driver type | planar-magnetic | balanced-armature |
| Driver config | single planar | 1BA |
| Impedance ohms | 15.2 | 45 |
| Sensitivity db mw | — | 98 |
| Frequency response (Hz) | — | 20-16000 |
| Connector type | 2pin-0.78mm | mmcx |
| Cable detachable | Yes | Yes |
| Plug termination | modular | 3.5mm |
| Shell material | — | aluminum |
| Weight grams | 5 | — |

## Key differences

- Driver type: 7Hz Timeless II planar-magnetic vs Etymotic ER4XR balanced-armature
- Driver config: 7Hz Timeless II single planar vs Etymotic ER4XR 1BA
- Impedance ohms: 7Hz Timeless II 15.2 vs Etymotic ER4XR 45
- Connector type: 7Hz Timeless II 2pin-0.78mm vs Etymotic ER4XR mmcx
- Plug termination: 7Hz Timeless II modular vs Etymotic ER4XR 3.5mm

## What reviewers say

**Etymotic ER4XR** — Three whitelisted testers (What Hi-Fi, TechHive, TechRadar) reviewed the ER4XR; TechRadar's is a joint ER4SR/ER4XR piece that discusses the XR trim explicitly. All three praise reference-grade midrange clarity, and two single out a tasteful bass lift over the ER4SR, but none ran lab measurements. Fit divides them: two call the deep insertion invasive or strange, one finds the flanges very comfortable. (3 sourced reviews.)

## Sources

- 7Hz Timeless II: https://www.linsoul.com/products/7hz-timeless-ii?currency=USD (linsoul.com, verified 2026-07-11)
- Etymotic ER4XR: https://etymotic.com/product/er4xr-earphones/ (etymotic.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/in-ear-monitors/7hz-timeless-ii-vs-etymotic-er4xr/
Cite: Per The Front Desk Review, 7Hz Timeless II ($229) vs Etymotic ER4XR ($349) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/in-ear-monitors/7hz-timeless-ii-vs-etymotic-er4xr/
License: CC BY 4.0.