| Specification | Acoustic Audio AA321B | Audioengine HD4 |
|---|---|---|
| Audio Performance | ||
| Signal To Noise Ratio | 88dB | 95 dBA |
| Frequency Response, Hz | 150Hz-20000Hz | 60-22000 |
| Crossover Frequency | ||
| Sensivity | ||
| Input Power | ||
| Power Output | ||
| Artificial Intelligency | ||
| Apple Air Play | ||
| Google Assitence | ||
| Alexa | ||
| Features | ||
| Voice Control | ||
| Portable | ||
| Microphone | ||
| App Control | ||
| Battery | ||
| Battery Life (mah/h | ||
| Music Services | ||
| Spotify | ||
| Amazon Music | ||
| Wired Connectivity | ||
| Output | 1 x Stereo RCA, 1 x Binding Post Pair Output | |
| Input | 1 x 1/8" / 3.5 mm, 1 x Stereo RCA and 1 x Binding Post Pair Input | |
| Ethernet | ||
| Bluetooth | ||
| Wi-fi | ||
| Drivers | ||
| Driver 2 | 1 x Woofer | 1 x 0.75" / 19.05 mm Silk Dome Tweeter (per Speaker) |
| Driver 1 | 1 x 4" / 101.6 mm Woofer (per Speaker) | |
| General | ||
| Waterprrof | ||
| Colors | Black | Black |
| Connection (wired/wireless) | Wired | Wireless |
| Placement Type | Table top | Table top |