SpeakerDecision
  • SPEAKERS
    • By Type
      Passive Bookshelf Speakers Passive Floor-standing Speakers Passive Center Channel Speakers Passive In-wall Speakers All Passive Speakers Powered Subwoofers Powered Stereo Speakers
      By Feature
      HDMI Input Room Correction Subwoofer Output Front Firing Port Handheld Remote Roon Ready
      By Brand
      Acoustic Energy Aperion ATC Audio-Technica Audioengine Bluesound Bowers Wilkins Buchardt Cambridge Audio Canton DALI Definitive Technology Dynaudio ELAC Emotiva Fluance Focal Fyne Audio Genelec GoldenEar Harbeth Jamo JBL Kanto KEF KLH Klipsch Leak Mackie Magnepan MartinLogan McIntosh Mission MoFi Monitor Audio Nuvo Onkyo OSD Paradigm Perlisten Polk Audio PS Audio PSB Q Acoustics REL Revel Russound Sennheiser Sonos Sonus faber Sony Spendor SVS Tannoy Technics Triangle Velodyne Victrola Wharfedale Wilson Audio Yamaha
  • AMPLIFIERS
    • By Type
      All Amplifiers Integrated Amplifiers Stereo Receivers Streaming Amplifiers Power Amplifiers Compact Amplifiers
      By Power
      Up to 60 watts 61 to 90 watts 91 to 120 watts 121 to 180 watts Over 180 watts
      By Feature
      HDMI Input Room Correction Subwoofer Output Handheld Remote Roon Ready
      Home Theater
      All Home Theater Receivers Anthem ARCAM Denon Integra JBL Marantz McIntosh NAD Onkyo Sony Yamaha
      Headphone Amps
      All Headphone Amplifiers Cambridge Audio iFi Audio McIntosh Naim Pro-Ject Rotel Schiit Audio Sennheiser Yamaha
      Multi-Zone
      All Multi-Zone Amplifiers JBL McIntosh OSD Rotel Russound Sonos
      By Brand
      Accuphase Advance Paris Anthem Arcam Audio Research AudioControl Audioengine Audiolab Bluesound Bose Buchardt Cambridge Audio Denon Devialet ELAC Emotiva Eversolo FiiO Fosi Audio Hegel HiFi Rose Integra JBL LEAK Luxman Marantz Mark Levinson McIntosh Michi MISSION MOON Musical Fidelity NAD Naim Onkyo OSD Parasound Pass Labs Peachtree PrimaLuna Primare PS Audio Rega Rogue Audio Roksan Rotel Schiit Audio Sonos Sony SVS T+A TEAC Technics Vincent WiiM Yamaha
  • SMART FIND
  • TOOLS
  • BLOG
  1. Home
  2. Acoustic Energy Speakers
  3. Passive Floor-standing Speakers
  4. Acoustic Energy AE509
Acoustic Energy AE509 Review
AE509 - Front View

Compare To

Main Features

  • 1" dome with waveguide Tweeter
  • 2 x 5" carbon fibre cone Woofer
  • 32Hz - 28kHz Frequency Response
  • 89 dB Sensitivity
  • Impedance: 6ohms
  • Power Range: up to 175 watts
  • Weight: 48.40 lbs / 22.00 kg
  • Dimensions(HxWxD): 39.4"x7.3"x10.6" / 1000.0 x 185.0 x 270.0mm
MSRP: $3,499 (list price)
Check price atAmazon›
x
Add a Speaker for comparison
AE509 Review
AE509 AE509
Check price atAmazon›

Made by Acoustic Energy · United Kingdom · since 1987 · sold through dealers

Acoustic Energy AE509 is a 2-way Passive Bass Reflex Floor-standing speaker by Acoustic Energy. It was released in 2019. It features a 1" dome with waveguide Tweeter and 2 x 5" carbon fibre cone Woofer. The speaker has a frequency range of 32Hz - 28kHz and a sensitivity of 89 dB. AE509 has an MSRP of 3499$ per pair.

Room Size Suitability

The size of the room where you plan to use the AE509 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-fieldBad
Small RoomPoor
Mid-size RoomGood
Large RoomGood
Very Large RoomPoor

(* 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's AE500 Series of Loudspeakers

AE509 is a member of Acoustic Energy's AE500 series of Passive speakers. The AE500 is Acoustic Energy's flagship standmount range, using premium drivers and a slot-loaded port for a refined, full-bodied sound. Below you can see the main specs of these speakers.

Acoustic Energy AE500 Series Speakers
Model Frequency SensitivityImpedance Woofer
AE500
Compare
45-28k Hz 87 dB6Ω 1 x 5"
AE520
Compare
30-28k Hz 90 dB6Ω 4 x 5"
AE509
32-28k Hz 89 dB6Ω 2 x 5"

Frequency Response of the AE509 Speaker

AE509 has a Frequency response range of 32Hz - 28kHz and Power Range of up to 175 watts. With a minimum frequency of 32 Hz, AE509 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's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Floor-standing Speakers
AE509
Min
Average
Median
Thinking about a subwoofer for the AE509?
  • Work out the crossover setting - it follows from this speaker's 32 Hz low end
  • Powered subwoofers under $5,000 - a similar price range to these speakers
  • Every powered subwoofer we cover, whatever the budget
AE509 Woofer
AE509's carbon fibre cone Woofer

Among the speakers in our database with a max MSRP price of 5000$ (Pair), these are the 5 Passive Floor-standing speakers that have the deeper bass levels than the AE509's 32Hz:

  • KLH Kendall with Low Frequency of 25 Hz (Compare w/ AE509)
  • GoldenEar Triton Five with Low Frequency of 26 Hz (Compare w/ AE509)
  • Monitor Audio Silver 500 7G with Low Frequency of 27 Hz (Compare w/ AE509)
  • KLH Concord with Low Frequency of 28 Hz (Compare w/ AE509)
  • SVS Ultra Tower with Low Frequency of 28 Hz (Compare w/ AE509)

Crossover frequency of the AE509?

The crossover frequency of the AE509 is set to 2800Hz. 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.

AE509 driver frequency bands32-2.8kWoofer 5"2.8k-28kTweeter 1"20501002005001k2k5k10k20k40kHz, log scale

Impedance and Sensitivity

AE509's nominal impedance level is 6 ohms and has a sensitivity of 89 dB.

Sensitivity
Floor-standing Speakers
AE509
Min
Average
Median

Nominal Impedance of the 6 Ohms makes the Acoustic Energy AE509 a relatively difficult to drive speaker compared to more frequently found 8 ohms speakers from nominal Impedance perspective.

Sensitivity

89dB of the Acoustic Energy AE509 is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise. Work out how loud the AE509 plays in your room →

Running more than one pair from a single amplifier? Check the load it would present →

What amplifier does the AE509 need?

At normal listening levels in a medium room, about 13–175 W per channel into 6 ohms. Set your own conditions and we will rank every amplifier we cover.

We check power, impedance safety and current delivery - not just watts.

Prefer to browse? Integrated amplifiers under $5,000, or every amplifier we cover.

Input Type

AE509 features type connectors.

AE509 Terminals
AE509's terminals

AE509 External Dimensions and Weight

AE509 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 is approximately 499.5cm2 / 77.4inch2.

Find speakers that fit your shelf or alcove →  ·  Work out where they should sit in the room →

Weight

The AE509 weighs 22.00kg / 48.4lbs per piece. Here is a comparison of how AE509's weight compares with the average, max and min weights in its class.

Weight
All Floor-standing Speakers
AE509
Min
Average
Median
Weight
Floor-standing Speakers under $5000
AE509
Min
Average
Max

How does the AE509 compare to the Acoustic Energy AE520?

One of the natural alternative to the AE509 is the AE520 which is located one step higher in Acoustic Energy's Passive Floor-standing selection.

Check the Detailed Comparison of AE509 vs AE520 for more details.

Cabinet type and Materials

AE509 has a Bass Reflex type cabinet and a Resonance Suppression Composite (RSC) finish. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.

AE509  Feet
AE509 Feet

Port Position

AE509 is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe.

Available colors

AE509 is available in Piano Gloss Black, Piano Gloss White and American Walnut wood veneer.

Does the AE509 come with a Grille?

AE509 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 is magnetic type, it is very easy to put it on and off.

AE509  with Grille
AE509 with Grille

Recommended Accessories

Here is a list of accessories that we think you may need for the Acoustic Energy AE509.

  • Speaker Cable and Connectors
    • Speaker Cables with Banana Plugs: If you know the lenght of the cable you need, this is the easier option to connect your speakers with your amp.
    • Speaker Cables without Connectors: If you are not sure about the lenght or need longer than standard cables with plugs, choose this option.
    • Banana Connectors and Plugs: If you chose the cables without connectors option or already have some cable around, pick the banana plugs separately.
  • Vibration Isolators: IsoAcoustics isolators are our favorite isolators but you may find more affordable options too.
  • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.

User's Manual

For more information about how to setup, use and maintain the Acoustic Energy AE509, use the direct link below to download the official manual document:
Download User Manual for AE509

Official Brochure

Here is a link to download the official brochure for the Acoustic Energy AE509 speaker:
Official Brochure for AE509

Official Product Page

Official manufacturer's product page for the Acoustic Energy AE509 speaker can be found below:
Official Product Page for AE509

Acoustic Energy AE509 Alternatives in Passive Floor-standing Speakers
Model Type Sensitivity Impedance Frequency
AE520
Compare
3-way 90 dB 6 ohms 30Hz - 28kHz
B&W 603
Compare
3-way 88.5 dB 8 ohms 48-28k Hz
AE309
Compare
3-way 89 dB 6 ohms 38Hz - 30kHz
AE320
Compare
3-way 90 dB 8 ohms 35Hz - 30kHz
AE500
Compare
2-way 87 dB 6 ohms 45Hz - 28kHz
B&W 702 S3
Compare
3-way 90 dB 8 ohms 46-28k Hz
DALI Opticon 8 II
Compare
3-way 88 dB 4 ohms 38-30k Hz
Monitor Audio Silver 500 7G
Compare
3-way 90.5 dB 8 ohms 27-35k Hz
Frequently Asked Questions about Acoustic Energy AE509

What amplifier do you need for the AE509?

Acoustic Energy rates the AE509 for up to 175 watts of amplifier power. It is a 6-ohm speaker, which most amplifiers and receivers handle without trouble.

Is the AE509 easy to drive?

The AE509 has a sensitivity of 89 dB. That is about average for a home speaker, so it is neither hard nor especially easy to drive.

Does the AE509 need a subwoofer?

The AE509 reaches down to 32Hz (full range 32Hz - 28kHz). That is genuinely deep bass - a subwoofer is optional unless you want home-theatre effects below that.

What drivers does the AE509 use?

The AE509 is a 2-way design using a 1" dome with waveguide tweeter and 2 x 5" carbon fibre cone woofers.

Is the AE509 sealed or ported?

The AE509 uses a Ported enclosure. A ported design uses a tuned vent to get more low-end output from the same driver, but it wants some breathing room behind it.

Does the AE509 come with grilles?

Yes. The AE509 comes with removable grilles.

How big and heavy is the AE509?

The AE509 weighs 22.00kg / 48.4lbs each and measures 39.4 x 7.3 x 10.6inch (HxWxD).

How much does the AE509 cost?

The AE509 has a manufacturer's list price (MSRP) of $3,499 per pair.


AE509 Detailed Specifications

General
BrandAcoustic Energy
Full Model NameAcoustic Energy AE509
Speaker Type2-way Floor-standing
Power Rangeup to 175 watts
Sensitivity89 dB
Impedance6 ohms
Max SPL115 dB
Frequency Response32Hz - 28kHz
Release Date2019
DRIVERS
Woofer Size5-inch
Woofer Compositioncarbon fibre cone
Tweeter Size1-inch
Tweeter Typedome with waveguide
Crossover freq2800Hz
Port Positionrear

CONNECTIONS
Port Positionrear
PHYSICAL SPECS
Height1000.0mm ( 39.4-inch)
Width185.0mm ( 7.3-inch)
Depth270.0mm ( 10.6-inch)
Height1000.0mm ( 39.4-inch)
Weight22 kg (48.4 lbs)
EnclosureBass Reflex
FinishResonance Suppression Composite (RSC)
Available ColorsPiano Gloss Black, Piano Gloss White, American Walnut wood veneer
GrilleYes
Moisture ResistanceNo
OTHER
Handheld RemoteNo
Parts Warranty
Labor Warranty
Was this review useful?
Tell us what is missing or wrong and we will fix it.
Thanks. Anything you would add?
Optional, and it goes straight to the person who maintains this page.
Thanks - noted.
LATEST BLOG POSTS

Triangle's Solstice Range Replaces the Esprit, and Every Cabinet Got Bigger
Yamaha's NX-70A Takes Our HDMI Speaker Count to 31, and 15 of Them Do eARC
Five of the 294 Amplifiers We List Still Have a CD Player. None of the 113 Released Since 2023 Do.
KEF's New 250 Watt Amplifier Is a 135 Watt Amplifier When All Eight Channels Are Running
Sonos Built an Eight-Channel Amp and Then Did the Rare Thing: Rated It With All Eight Running
Klipsch Reference Premiere III: Nine Models, Cheaper Than Gen II, and Two Centre Prices That Look Swapped


Latest Passive Floor-standing Speakers
Klipsch Reference Premiere RP-6203F
Klipsch RP-6203F
2-way Floor-standing | 96 dB | 8 ohms
Klipsch Reference Premiere RP-8203F
Klipsch RP-8203F
2-way Floor-standing | 98 dB | 8 ohms
Klipsch Reference Premiere RP-8263FA
Klipsch RP-8263FA
2-way Floor-standing | 98 dB | 8 ohms
Triangle Solstice 8
Triangle Solstice 8
3-way Floor-standing | 91 dB | 8 ohms
Wharfedale Elysian 3 R
Wharfedale Elysian 3 R
3-way Floor-standing | 89 dB | 4 ohms
Revel Performa4 F346
Revel Performa4 F346
2-way Floor-standing | 88 dB | 6 ohms
Revel Performa4 F345
Revel Performa4 F345
2-way Floor-standing | 87 dB | 6 ohms
DALI SONIK 9
DALI SONIK 9
3-way Floor-standing | 90 dB | 6 ohms
DALI SONIK 7
DALI SONIK 7
3-way Floor-standing | 88.5 dB | 6 ohms
DALI SONIK 5
DALI SONIK 5
2-way Floor-standing | 88 dB | 6 ohms


This site contains affiliate links. We may be compensated if you make a purchase after clicking through one of them. As an Amazon Associate we earn from qualifying purchases.
Copyright © 2026 by SpeakerDecision
About Privacy Contact US Camera Decision