ET 4 SQ Class AB Amplifier
EMMA Best of the Year 2023 · 4 × 180 W
Model ET 4 SQ
The ET 4 SQ is the amplifier that earned ETHOS the EMMA Singapore Best of the Year 2023 award, installed in competition vehicles across every event of the championship.
A four-channel Class AB design built for fidelity first: distortion below 0.001%, stereo separation above 60 dB and a weighted noise floor beyond 120 dB.
- EMMA Singapore Best of the Year 2023
- Four-channel Class AB sound-quality design
- Total harmonic distortion below 0.0009%
- Bridgeable to 2 × 500 W
Specifications
ET 4 SQ Class AB Amplifier — Technical Data
| Output power | 4 × 180 W (4 Ω) · 4 × 280 W (2 Ω) · 2 × 500 W bridged (4 Ω) |
|---|---|
| Total harmonic distortion | < 0.0009% |
| Stereo separation | > 60 dB |
| Weighted signal-to-noise | > 120 dB |
| Input sensitivity | 0.1 – 4 V |
| Supply | 12 V (10 – 16 V) |
| Dimensions (H × W × D) | 45 × 355 × 190 mm |
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