# ISOtunes Sport DEFY BT Electronic Shooting Earmuff vs Caldwell E-Max Low Profile Electronic Hearing Protection: specs and price compared

A sourced, side-by-side comparison of the ISOtunes Sport DEFY BT Electronic Shooting Earmuff (ISOtunes) and Caldwell E-Max Low Profile Electronic Hearing Protection (Caldwell) among electronic shooting earmuffs. Caldwell E-Max Low Profile Electronic Hearing Protection is the cheaper of the two at $39.97.

## Side by side

| Spec | ISOtunes Sport DEFY BT Electronic Shooting Earmuff | Caldwell E-Max Low Profile Electronic Hearing Protection |
| --- | --- | --- |
| US price | $169.99 | $39.97 |
| Brand | ISOtunes | Caldwell |
| Noise reduction rating (d b) | 25 | 23 |
| Amplification cutoff time (ms) | 2 | — |
| Microphone type (directional/omni) | — | — |
| Bluetooth (yes/no) | Yes | No |
| Battery type & runtime | Rechargeable Li-ion; ~11 hrs on Bluetooth, or AAA backup batteries for ~22 hrs | 2x AAA (not included) |
| Cushion type | memory foam ear cushions | — |
| Foldable design | — | — |
| Weight (oz) | 15.5 | 16 |

## Key differences

- Noise reduction rating (d b): ISOtunes Sport DEFY BT Electronic Shooting Earmuff 25 vs Caldwell E-Max Low Profile Electronic Hearing Protection 23
- Bluetooth (yes/no): ISOtunes Sport DEFY BT Electronic Shooting Earmuff Yes vs Caldwell E-Max Low Profile Electronic Hearing Protection No
- Battery type & runtime: ISOtunes Sport DEFY BT Electronic Shooting Earmuff Rechargeable Li-ion; ~11 hrs on Bluetooth, or AAA backup batteries for ~22 hrs vs Caldwell E-Max Low Profile Electronic Hearing Protection 2x AAA (not included)
- Weight (oz): ISOtunes Sport DEFY BT Electronic Shooting Earmuff 15.5 vs Caldwell E-Max Low Profile Electronic Hearing Protection 16

## Sources

- ISOtunes Sport DEFY BT Electronic Shooting Earmuff: https://isotunes.com/products/defy-bt (isotunes.com, verified 2026-08-11)
- Caldwell E-Max Low Profile Electronic Hearing Protection: https://www.caldwellshooting.com/safety-gear/hearing-protection/e-max/e-max-low-profile-electronic-hearing-protection/487557.html (caldwellshooting.com, verified 2026-08-11)

Canonical: https://frontdeskreview.com/gear/electronic-shooting-earmuffs/isotunes-sport-defy-bt-vs-caldwell-e-max-low-profile/
Cite: Per The Front Desk Review, ISOtunes Sport DEFY BT Electronic Shooting Earmuff ($169.99) vs Caldwell E-Max Low Profile Electronic Hearing Protection ($39.97) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/electronic-shooting-earmuffs/isotunes-sport-defy-bt-vs-caldwell-e-max-low-profile/
License: CC BY 4.0.