Acoustic Energy AE509
2-way floorstanding speaker with carbon fibre cones and tweeter, designed for medium to large rooms.
Description
The AE509 is a slim-format floorstanding speaker, designed to fit into medium to large rooms without imposing a bulky visual presence. It belongs to a mid-range line, positioned above the brand's entry-level models, with a superior level of finish and performance.
Its 2-way design pairs a 125 mm carbon fibre cone midrange/woofer with a 25 mm carbon fibre dome tweeter, with a crossover frequency set at 2.9 kHz. The stated frequency range extends from 32 Hz to 28 kHz (+/- 6 dB), reflecting a wide-ranging performance covering both bass and treble. With a sensitivity of 89 dB and an impedance of 6 ohms, the speaker can deliver a maximum sound level of 115 dB for a power handling of 175 W, allowing it to work with moderately powered amplifiers while retaining dynamic headroom.
This type of floorstanding speaker is aimed at music enthusiasts seeking stereo or home cinema sound in a comfortably sized living room, with a slim profile that blends easily into an interior. The compact 2-way design suits demanding listening without requiring a dedicated, large-sized room.
Technical specifications
| Frequency range | 32Hz – 28kHz (+/- 6dB) |
| Sensitivity | 89dB |
| Maximum SPL | 115 dB |
| Power handling | 175 w |
| Crossover frequency | 2.9 kHz |
| Impedance | 6 ohms |
| Design | 2-way |
| Drive unit | 125 mm carbon fibre cones |
| Tweeter | 25 mm carbon fibre dome |
| Dimensions (H × W × D) | 1000 x 185 x 270 mm, excluding spikes |
| Weight | 22kg (each) |
What to check before buying used
On this 2-way floorstanding speaker, it is worth checking the condition of the carbon fibre cones and tweeter dome, which are sensitive to impacts or deformation that can affect sound quality. A listening test across the full frequency range allows any distortion or loss of midrange/bass to be detected. It is also worth ensuring that both speakers in the pair deliver an even sound level, as a discrepancy may indicate a worn driver.
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