Acoustic Energy AE509 Mark II is a 2-way Passive Floor-standing speaker by Acoustic Energy. It was released in November 2026. It features a 1.1" Dome Tweeter and 2 x 5" carbon fibre cone Woofer.
Two-way tower: a 29 mm soft dome and two 125 mm (5-inch) carbon fibre cones, 8 ohms. 1,000 mm tall without spikes. Frequency range quoted at +/-6 dB. No US price yet.
The speaker has a frequency range of 32-28k Hz and a sensitivity of 89 dB.
Room Size Suitability
The size of the room where you plan to use the AE509 Mark II is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:
| Listening Environment* |
Suitability |
| Near-field | Bad |
| Small Room | Poor |
| Mid-size Room | Good |
| Large Room | Good |
| Very Large Room | Poor |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
Acoustic Energy replaced the older AE509 with this model. Follow the link to read our detailed comparison of these models:
Compare AE509 Mark II vs AE509
Acoustic Energy's AE500 Mark II Series of Loudspeakers
AE509 Mark II is a member of Acoustic Energy's AE500 Mark II series of Passive speakers. Below you can see the main specs of these speakers.
See all 4 Acoustic Energy AE500 Mark II models compared »
Acoustic Energy AE500 Mark II Series Speakers
Frequency Response of the AE509 Mark II Speaker
AE509 Mark II has a Frequency response range of 32-28k Hz at ±6dB and Power Range of up to 175 watts. With a minimum frequency of 32 Hz, AE509 Mark II delivers deep bass that will likely satisfy most listeners, especially those who enjoy music. However, movie enthusiasts and music fans who prefer a full range of sound may still benefit from adding a subwoofer.
Here we have a comparison of how AE509 Mark II's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Floor-standing Speakers
Thinking about a subwoofer for the AE509 Mark II?
Crossover frequency of the AE509 Mark II?
The crossover frequency of the AE509 Mark II is set to 3.4kHz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.
Impedance and Sensitivity
AE509 Mark II's nominal impedance level is
8 ohms and has a sensitivity of
89 dB.
Sensitivity
Floor-standing Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Acoustic Energy AE509 Mark II is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
89dB of the Acoustic Energy AE509 Mark II is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise. Work out how loud the AE509 Mark II plays in your room →
What amplifier does the AE509 Mark II need?
At normal listening levels in a medium room, about
9.5–150 W
per channel into 8 ohms.
Set your own conditions and we will rank every amplifier we cover.
Prefer to browse? See every integrated amplifier we cover.
Input Type
AE509 Mark II features type connectors.
AE509 Mark II External Dimensions and Weight
AE509 Mark II has external dimensions of (Height x Width x Depth) 39.4 x 7.3 x 10.6inch (1000.0 x 185.0 x 270.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of AE509 Mark II is approximately 499.5cm2 / 77.4inch2.
Millimetres are hard to picture, so here is the AE509 Mark II drawn to scale next to the Klipsch R-620F, the closest floor-standing to it in price that we cover.
Size, drawn to scale
Both speakers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same surface and pushed back to the same wall, so the deeper one visibly sticks out further.
Klipsch R-620F needs about 77% more floor or shelf area. Klipsch R-620F is 99mm deeper, so it stands that much further out from the wall. Klipsch R-620F is 21mm taller.
Full comparison: AE509 Mark II vs Klipsch R-620F ›
Find speakers that fit your shelf or alcove → · Work out where they should sit in the room →
WeightThe AE509 Mark II weighs 19.00kg / 41.8lbs per piece. Here is a comparison of how AE509 Mark II's weight compares with the average, max and min weights in its class.
Weight
All Floor-standing Speakers
How does the AE509 Mark II compare to the Acoustic Energy AE520 Mark II?
One of the natural alternative to the AE509 Mark II is the AE520 Mark II which is located one step higher in Acoustic Energy's Passive Floor-standing selection.
Check the Detailed Comparison of AE509 Mark II vs AE520 Mark II for more details.
Available colors
AE509 Mark II is available in Piano Gloss White, Piano Gloss Black and American Walnut wood veneer.
Does the AE509 Mark II come with a Grille?
AE509 Mark II comes with magnetic grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible. Since the included grille of the AE509 Mark II is magnetic type, it is very easy to put it on and off.
Recommended Accessories
Here is a list of accessories that we think you may need for the Acoustic Energy AE509 Mark II.
Official Product Page
Official manufacturer's product page for the Acoustic Energy AE509 Mark II speaker can be found below:
Official Product Page for AE509 Mark II