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Audio Pro Addon C3 Review | 130 Data compared

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  • Avg. price in UK: ~£180
  • Avg. price in US: ~$250
  • Audio output power: 25.00 W
  • Battery life: 15 hours
  • IP rating: IPX4
  • Bluetooth version: 4.0
  • Weight: 2100 g

Audio Pro Addon C3 review. Compare 130 technical specifications and user reviews to see how this product ranks in the Portable Speakers category and whether it is worth buying.

7.5

Overall score

What it is: An overall evaluation of products in the Portable Speakers category, based on technical analysis and user reviews.

When it matters: When you need a quick reference for identifying the best products in the Portable Speakers category.

Score components:

80.0%

7.1

Technical Score

20.0%

9.0

User score

Very good
7.1

Technical Score

What it is: An assessment of technical performance for products in the Portable Speakers category across these key areas: Audio, Connectivity, Battery, Durability, Controls, Design, Smart features.

When it matters: When you want to compare products in the Portable Speakers category by technical performance, specifications, and available features.

Score components:

32.0%

7.1

Audio

20.0%

8.6

Battery

18.0%

5.7

Durability

16.0%

6.0

Connectivity

8.0%

8.1

Controls

3.0%

7.4

Design

3.0%

8.5

Smart features

Very good
9.0

User score

What it is: A rating that combines user reviews with the total review volume for products in the Portable Speakers category.

When it matters: When you want to know how products in the Portable Speakers category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

8.6

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(288)
United States
Amazon_logo.png
3.9
(281)

(Reviews last updated: August 2026)

Exceptional
  • 7.8
    Outdoor durability

    Score components:

    40.0%

    10

    Water resistance

    25.0%

    4.9

    IP rating

    20.0%

    7.9

    Weight

    15.0%

    7.0

    Battery life

  • 6.1
    Powerful sound

    Score components:

    45.0%

    3.8

    Audio output power

    25.0%

    7.0

    Battery life

    15.0%

    7.9

    Weight

    15.0%

    10

    Party mode

  • 8.4
    Home listening

    Score components:

    35.0%

    10

    Multi-room support

    30.0%

    10

    Wi-Fi connectivity

    20.0%

    3.8

    Audio output power

    15.0%

    7.9

    Weight

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Best prices in UK

Best rankings

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Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Audio Pro Addon C3 is a compact, portable wireless multiroom speaker equipped with a 25W Class D digital amplifier, two 0.75-inch textile dome tweeters, and a single 3.5-inch long-throw woofer that deliver a 60–20,000 Hz frequency range. Its standout features include dual-band multiroom Wi-Fi, Apple AirPlay, Spotify Connect, Bluetooth 4.0, a physical Ethernet port, a 3.5mm auxiliary input, and a built-in rechargeable battery providing up to 15 hours of playback at half volume. Prominent pros are its refined, award-winning sound quality, sleek Scandinavian aesthetic with a leather carrying handle, and convenient top-panel preset buttons for instant playlist access. However, its primary cons include a lack of an official IP water-resistance rating for rugged outdoor use, the absence of modern smart assistants like native Google Assistant or Alexa, and a slightly finicky proprietary app interface.

Technical Specifications of portable speaker Audio Pro Addon C3

Technical Score

What it is: An assessment of technical performance for products in the Portable Speakers category across these key areas: Audio, Connectivity, Battery, Durability, Controls, Design, Smart features.

When it matters: When you want to compare products in the Portable Speakers category by technical performance, specifications, and available features.

Score components:

32.0%

7.1

Audio

20.0%

8.6

Battery

18.0%

5.7

Durability

16.0%

6.0

Connectivity

8.0%

8.1

Controls

3.0%

7.4

Design

3.0%

8.5

Smart features

7.1
Audio Pro Addon C3 has a technical score of 7.1 points, which is higher than 66.7% of products in this category.
User score

What it is: A rating that combines user reviews with the total review volume for products in the Portable Speakers category.

When it matters: When you want to know how products in the Portable Speakers category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

8.6

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(288)
United States
Amazon_logo.png
3.9
(281)

(Reviews last updated: August 2026)

9.0
Audio Pro Addon C3 has a user score of 9.02 points, which is higher than 75.5% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by products in the Portable Speakers category.
When it matters: When you prefer products in the Portable Speakers category that have been chosen and reviewed by many other buyers.
10
Audio Pro Addon C3 has a popularity of 10 points, which is higher than 66.6% of products in this category.
Ratio quality/price

What it is: An indicator that combines the overall score of products in the Portable Speakers category with their prices.

When it matters: When you are comparing products in the Portable Speakers category and want a good balance between quality and price.

Score components:

60.0%

7.5

Overall score

40.0%

9.6

Price

8.1
Audio Pro Addon C3 has a quality-to-price ratio of 8.1 points, which is higher than 76.4% of products in this category.
Audio output power
What it is: The maximum continuous power the speaker system can deliver.
When it matters: When you need enough output to fill a larger or noisier space.

Importance: HIGH

Good value: >= 20 W

25.00 W
Audio Pro Addon C3 has an audio output power of 25.00 W which is higher than that of 59.6% of portable speakers and equal to that of 2% of portable speakers.
Total RMS output: 25.00 W.
Driver unit size
What it is: The diameter of each main speaker driver.
When it matters: When the size of the main driver influences bass reach and output capability.

Importance: HIGH

Good value: >= 50 mm

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Number of drivers
What it is: The total number of speaker drivers built into the unit.
When it matters: When fuller driver arrays and broader sound coverage matter.

Importance: MEDIUM

Good value: >= 2

3
Audio Pro Addon C3 has 3 drivers, which is more than 70.1% of portable speakers and equal to the number in 11.5% of portable speakers.
Acoustic drivers: 3.
Frequency response tolerance
What it is: The allowed deviation around the stated frequency response curve.
When it matters: When a flatter and more accurate frequency response matters.

Importance: MEDIUM

Good value: <= 3 dB

?
Lowest frequency
What it is: The lowest audible frequency the speaker can reproduce.
When it matters: When deeper bass extension matters.

Importance: HIGH

Good value: <= 60 Hz

60.00 Hz
Audio Pro Addon C3 has a lowest frequency of 60.00 Hz which is lower than that of 43.8% of portable speakers and equal to that of 9.2% of portable speakers.
Lower frequency-response endpoint: 60.00 Hz.
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Bluetooth connectivity
What it is: Indicates whether the speaker can receive audio over Bluetooth.
When it matters: When wireless playback from phones, tablets, or computers matters.

Importance: MEDIUM

Good value: yes

yes
Audio Pro Addon C3 supports Bluetooth audio. 5.4% of portable speakers offer this feature.
Bluetooth version
What it is: The generation of Bluetooth supported by the speaker hardware.
When it matters: When compatibility and efficiency with newer Bluetooth devices matter.

Importance: LOW

Good value: >= 5.0

4.0
Audio Pro Addon C3 supports Bluetooth version 4.0 which is older than that of 76.7% of portable speakers and equal to that of 8.7% of portable speakers.
Bluetooth version: 4.0.
Maximum Bluetooth range
What it is: The farthest distance at which the Bluetooth link can remain usable.
When it matters: When the source device may be far from the speaker.

Importance: MEDIUM

Good value: >= 10 m

10.00 m
Audio Pro Addon C3 has a maximum Bluetooth range of 10.00 m which is longer than that of 4.3% of portable speakers and equal to that of 70.2% of portable speakers.
Maximum Bluetooth range: 10.00 m.
Bluetooth profiles supported
What it is: The Bluetooth operating profiles available for playback, control, or calls.
When it matters: When Bluetooth playback, control, and call compatibility depend on specific profiles.

Importance: LOW

?
Bluetooth LE Audio
What it is: Shows whether the speaker supports the low-energy Bluetooth audio standard.
When it matters: When newer low-power Bluetooth audio features matter.

Importance: LOW

Good value: yes

no
Audio Pro Addon C3 does not support Bluetooth LE Audio. 2.5% of portable speakers offer this feature.
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Battery life
What it is: The playback time available from one full battery charge.
When it matters: When you need longer playback between charges.

Importance: HIGH

Good value: >= 20 h

15 hours
Audio Pro Addon C3 has a battery life of 15 hours which is longer than that of 67% of portable speakers and equal to that of 6.5% of portable speakers.
Battery capacity
What it is: The amount of electrical charge the internal battery can store.
When it matters: When longer untethered playback or power-bank use needs more stored charge.

Importance: HIGH

Good value: >= 5000 mAh

?
Charging time
What it is: The time needed to recharge the battery fully.
When it matters: When the speaker needs to be ready again quickly.

Importance: MEDIUM

Good value: <= 4 h

2 hours
Audio Pro Addon C3 has a charging time of 2 hours which is shorter than that of 72.9% of portable speakers and equal to that of 22.6% of portable speakers.
Maximum charging input power
What it is: The maximum charging power the speaker can accept from a compatible power source.
When it matters: When faster charging requires the speaker to accept more input power.

Importance: LOW

Good value: >= 20 W

?
Built-in rechargeable battery
What it is: Indicates whether the speaker uses a battery that can be recharged.
When it matters: When portable use without disposable batteries or continuous mains power matters.

Importance: LOW

Good value: yes

yes
Audio Pro Addon C3 has a built-in rechargeable battery. 18.7% of portable speakers offer this feature.
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IP rating
What it is: The ingress protection code for dust and water resistance.
When it matters: When dust and water protection need to match the intended environment.

Importance: HIGH

Good value: IP67+

IPX4
Audio Pro Addon C3 has an IP rating of IPX4 which provides worse ingress protection than 77.7% of portable speakers and the same ingress protection as 21% of portable speakers.
Water resistance
What it is: Indicates whether the enclosure can resist water exposure.
When it matters: When the speaker may be used near pools, rain, or splashes.

Importance: MEDIUM

Good value: yes

yes
Audio Pro Addon C3 is water resistant. 38.3% of portable speakers offer this feature.
Dust resistance
What it is: Shows whether the enclosure is protected against dust ingress.
When it matters: When the speaker may be exposed to sand, soil, or dusty environments.

Importance: MEDIUM

Good value: yes

no
Audio Pro Addon C3 is not rated as dust resistant. 51.5% of portable speakers offer this feature.
Waterproof depth rating
What it is: The maximum water depth the speaker is rated to withstand.
When it matters: When the speaker may be submerged or used very close to water.

Importance: MEDIUM

Good value: >= 1 m

0 m
Audio Pro Addon C3 is not rated for underwater use. 47.6% of cameras have a native waterproof depth rating.
Drop resistance
What it is: Indicates whether the housing is designed to survive accidental drops.
When it matters: When the speaker may be bumped or suffer an accidental fall during outdoor or travel use.

Importance: LOW

Good value: yes

?
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On-device controls placement
What it is: The physical area of the speaker where its controls are located.
When it matters: When you want controls that are easy to reach in the speaker intended placement.

Importance: LOW

top
Touchscreen
What it is: Indicates whether a touch-sensitive screen is integrated.
When it matters: When direct visual control is more convenient than buttons or an app.

Importance: LOW

Good value: yes

no
Audio Pro Addon C3 does not have a touchscreen. 0.3% of portable speakers offer this feature.
The speaker does not have an integrated touchscreen.
Smartphone app control
What it is: Shows whether the speaker can be controlled from a phone app.
When it matters: When remote settings, updates, or sound adjustment from a phone matter.

Importance: LOW

Good value: yes

yes
Audio Pro Addon C3 supports smartphone app control. 46.1% of portable speakers offer this feature.
Compatible mobile app provides speaker control or settings.
Remote control
What it is: Indicates whether a dedicated remote control is supplied or supported.
When it matters: When you want to control playback from across the room.

Importance: LOW

Good value: yes

no
Audio Pro Addon C3 does not include a remote control. 15% of portable speakers offer this feature.
No dedicated remote control is documented.
Fast pairing
What it is: Shows whether setup with compatible devices can be completed more quickly.
When it matters: When quick setup with compatible devices matters.

Importance: LOW

Good value: yes

no
Audio Pro Addon C3 does not support fast pairing. 22.5% of portable speakers offer this feature.
No qualifying fast-pair capability; initial pairing is manual or standard.
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Weight
What it is: The total mass of the portable speaker.
When it matters: When carrying the speaker frequently or packing light matters.

Importance: LOW

Good value: <= 1000 g

2100 g
Audio Pro Addon C3 weighs 2100 g which is heavier than that of 73% of portable speakers and equal to that of 0.5% of portable speakers.
Height
What it is: The vertical external dimension of the speaker body.
When it matters: When the speaker must fit beneath shelves or in a compact bag.

Importance: LOW

Good value: <= 20 cm

11.5 cm
Audio Pro Addon C3 has a height of 11.5 cm which is shorter than that of 52.5% of portable speakers and equal to that of 1.3% of portable speakers.
Width
What it is: The side-to-side external dimension of the speaker body.
When it matters: When the speaker must fit a narrow shelf, bag, or tabletop.

Importance: LOW

Good value: <= 25 cm

21.5 cm
Audio Pro Addon C3 has a width of 21.5 cm which is wider than that of 61.5% of portable speakers and equal to that of 0.6% of portable speakers.
Depth
What it is: The front-to-back depth of the speaker housing.
When it matters: When the speaker should take up less front-to-back space.

Importance: LOW

Good value: <= 10 cm

13.5 cm
Audio Pro Addon C3 has a depth of 13.5 cm which is deeper than that of 73.9% of portable speakers and equal to that of 0.7% of portable speakers.
Carry options
What it is: The available ways to carry, hang, or attach the speaker.
When it matters: When a handle, strap, or attachment point changes how you carry the speaker.

Importance: LOW

handle
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Companion app name
What it is: The official app used to control settings and functions of the speaker.
When it matters: When app compatibility and the available control features depend on the official app.

Importance: LOW

Audio Pro Control
Firmware updates
What it is: Indicates whether the speaker can receive firmware revisions after purchase.
When it matters: When post-purchase fixes and feature improvements matter.

Importance: LOW

Good value: yes

yes
Audio Pro Addon C3 supports firmware updates. 52.9% of portable speakers offer this feature.
Supports user-accessible firmware updates.
Firmware update method
What it is: The path used to install firmware updates on the speaker.
When it matters: When the convenience and reliability of installing updates matters.

Importance: LOW

OTA; App
Voice assistant support
What it is: Indicates whether the speaker can work with supported voice assistants.
When it matters: When hands-free control through a compatible assistant matters.

Importance: LOW

Good value: yes

yes
Audio Pro Addon C3 supports voice assistants. 73.6% of portable speakers offer this feature.
Supports direct voice-assistant control.
Spotify Connect
What it is: Shows whether Spotify can stream directly to the speaker over the network.
When it matters: When Spotify should stream directly without keeping phone audio active.

Importance: LOW

Good value: yes

yes
Audio Pro Addon C3 supports Spotify Connect. 89.3% of portable speakers offer this feature.
Supports native Spotify Connect.
Show more

Audio Pro Addon C3 vs the average portable speaker

  • Supports Wi-Fi connectivity
    Audio Pro Addon C3 supports Wi-Fi connectivity, while the average portable speaker does not support Wi-Fi connectivity.
    What it is: Indicates whether the speaker can connect to wireless local networks.
    When it matters: When direct network streaming or smart multi-room features matter.

    Importance: MEDIUM

    Good value: yes

    Audio Pro Addon C3 supports Wi-Fi connectivity, while the average portable speaker does not support Wi-Fi connectivity.
  • Supports AirPlay
    Audio Pro Addon C3 supports AirPlay, while the average portable speaker does not support AirPlay.
    Supports Apple AirPlay.
    What it is: Indicates whether Apple AirPlay streaming is supported.
    When it matters: When wireless playback from Apple devices and multi-room setups matters.

    Importance: LOW

    Good value: yes

    Audio Pro Addon C3 supports AirPlay, while the average portable speaker does not support AirPlay.
  • 1 hours shorter charging time
    Audio Pro Addon C3 has a shorter charging time than the average portable speaker (2 hours vs 3 hours).
    What it is: The time needed to recharge the battery fully.
    When it matters: When the speaker needs to be ready again quickly.

    Importance: MEDIUM

    Good value: <= 4 h

    Audio Pro Addon C3 has a shorter charging time than the average portable speaker (2 hours vs 3 hours).2 hours vs 3 hours
  • Has built-in stereo speakers
    Audio Pro Addon C3 has built-in stereo speakers, while the average portable speaker does not have built-in stereo speakers.
    Provides true stereo output within the unit.
    What it is: Shows whether the device uses separate left and right audio channels.
    When it matters: When true left-and-right channel playback matters without pairing a second speaker.

    Importance: LOW

    Good value: yes

    Audio Pro Addon C3 has built-in stereo speakers, while the average portable speaker does not have built-in stereo speakers.
  • Has an equalizer
    Audio Pro Addon C3 has an equalizer, while the average portable speaker does not have an equalizer.
    Offers user-selectable EQ, tone adjustment, or sound presets.
    What it is: Shows whether the sound balance can be adjusted across frequency ranges.
    When it matters: When you want to adjust bass, midrange, or treble balance.

    Importance: LOW

    Good value: yes

    Audio Pro Addon C3 has an equalizer, while the average portable speaker does not have an equalizer.
  • Has a power bank function
    Audio Pro Addon C3 has a power bank function, while the average portable speaker does not have a power bank function.
    What it is: Shows whether the speaker can send power to charge another device.
    When it matters: When the speaker should also charge a phone or another device.

    Importance: LOW

    Good value: yes

    Audio Pro Addon C3 has a power bank function, while the average portable speaker does not have a power bank function.
  • 1 more speaker drivers
    Audio Pro Addon C3 has more speaker drivers than the average portable speaker (3 vs 2).
    Acoustic drivers: 3.
    What it is: The total number of speaker drivers built into the unit.
    When it matters: When fuller driver arrays and broader sound coverage matter.

    Importance: MEDIUM

    Good value: >= 2

    Audio Pro Addon C3 has more speaker drivers than the average portable speaker (3 vs 2).3 vs 2
  • Supports party mode
    Audio Pro Addon C3 supports party mode, while the average portable speaker does not support party mode.
    Supports synchronized multi-speaker party/group playback.
    What it is: Indicates whether multiple speakers can play the same audio together.
    When it matters: When several compatible speakers should play together.

    Importance: LOW

    Good value: yes

    Audio Pro Addon C3 supports party mode, while the average portable speaker does not support party mode.
  • Has built-in stereo speakers
    Audio Pro Addon C3 has built-in stereo speakers, while the average portable speaker does not have built-in stereo speakers.
  • 1 more speaker drivers
    Audio Pro Addon C3 has more speaker drivers than the average portable speaker (3 vs 2).
  • 5 W more audio output power
    Audio Pro Addon C3 has more audio output power than the average portable speaker (25 W vs 20.00 W).
  • Supports Wi-Fi connectivity
    Audio Pro Addon C3 supports Wi-Fi connectivity, while the average portable speaker does not support Wi-Fi connectivity.
  • Supports AirPlay
    Audio Pro Addon C3 supports AirPlay, while the average portable speaker does not support AirPlay.
  • Supports DLNA media sharing
    Audio Pro Addon C3 supports DLNA media sharing, while the average portable speaker does not support DLNA media sharing.
  • Has Ethernet support
    Audio Pro Addon C3 has Ethernet support, while the average portable speaker does not have Ethernet support.
  • 1 hours shorter charging time
    Audio Pro Addon C3 has a shorter charging time than the average portable speaker (2 hours vs 3 hours).
  • Has a power bank function
    Audio Pro Addon C3 has a power bank function, while the average portable speaker does not have a power bank function.
  • 3 hours longer battery life
    Audio Pro Addon C3 has a longer battery life than the average portable speaker (15 hours vs 12 hours).
  • Has a removable battery
    Audio Pro Addon C3 has a removable battery, while the average portable speaker does not have a removable battery.
  • Includes a power adapter
    Audio Pro Addon C3 includes a power adapter, while the average portable speaker does not include a power adapter.
  • Has an equalizer
    Audio Pro Addon C3 has an equalizer, while the average portable speaker does not have an equalizer.
  • Supports party mode
    Audio Pro Addon C3 supports party mode, while the average portable speaker does not support party mode.
  • Has a programmable button
    Audio Pro Addon C3 has a programmable button, while the average portable speaker does not have a programmable button.
  • Has a sleep timer
    Audio Pro Addon C3 has a sleep timer, while the average portable speaker does not have a sleep timer.
  • Supports multi-room audio
    Audio Pro Addon C3 supports multi-room audio, while the average portable speaker does not support multi-room audio.
  • Supports Spotify Connect
    Audio Pro Addon C3 supports Spotify Connect, while the average portable speaker does not support Spotify Connect.
  • Supports voice assistants
    Audio Pro Addon C3 supports voice assistants, while the average portable speaker does not support voice assistants.
  • Supports firmware updates
    Audio Pro Addon C3 supports firmware updates, while the average portable speaker does not support firmware updates.

Total
Overall
Audio
Connectivity
Battery
Controls
Smart features
  • 1 fewer microphones
    Audio Pro Addon C3 has fewer microphones than the average portable speaker (0 vs 1).
    Built-in microphones: 0.
  • Does not include a passive radiator
    Audio Pro Addon C3 does not include a passive radiator, while the average portable speaker includes a passive radiator.
  • 1 Bluetooth levels older
    Audio Pro Addon C3 has an older Bluetooth version than the average portable speaker (4 vs 5.0).
    Bluetooth version: 4.0.
  • Fewer Wi-Fi band options
    Audio Pro Addon C3 lists 2.4 GHz for Wi-Fi bands, while the average portable speaker lists 2.4 GHz/5 GHz.
    Wi-Fi bands: 2.4 GHz.
  • 1 fewer USB ports
    Audio Pro Addon C3 has fewer USB ports than the average portable speaker (0 vs 1).
    Physical USB ports: 0.
  • Alternative Wi-Fi standard
    Audio Pro Addon C3 supports Wi-Fi 1 (802.11b), while the average portable speaker supports Wi-Fi 4 (802.11n).
    Wi-Fi standard: Wi-Fi 1 (802.11b).
  • Is not rated as dust resistant
    Audio Pro Addon C3 is not rated as dust resistant, while the average portable speaker is dust resistant.
  • 5 °C higher minimum operating temperature
    Audio Pro Addon C3 has a higher minimum operating temperature than the average portable speaker (5 °C vs 0 °C).
  • Worse ingress protection
    Audio Pro Addon C3 has worse ingress protection than the average portable speaker (IPX4 vs IPX5).
  • 1,300 g heavier
    Audio Pro Addon C3 is heavier than the average portable speaker (2100 g vs 800 g).
  • 5.2 cm deeper
    Audio Pro Addon C3 is deeper than the average portable speaker (13.5 cm vs 8.3 cm).
  • 3.4 cm wider
    Audio Pro Addon C3 is wider than the average portable speaker (21.5 cm vs 18.1 cm).
  • Is not rated as dust resistant
    Audio Pro Addon C3 is not rated as dust resistant, while the average portable speaker is dust resistant.
    What it is: Shows whether the enclosure is protected against dust ingress.
    When it matters: When the speaker may be exposed to sand, soil, or dusty environments.

    Importance: MEDIUM

    Good value: yes

    Audio Pro Addon C3 is not rated as dust resistant, while the average portable speaker is dust resistant.
  • 1 fewer microphones
    Audio Pro Addon C3 has fewer microphones than the average portable speaker (0 vs 1).
    Built-in microphones: 0.
    What it is: The number of microphones built into the speaker.
    When it matters: When voice pickup, calls, or beamforming performance matter.

    Importance: LOW

    Good value: >= 1

    Audio Pro Addon C3 has fewer microphones than the average portable speaker (0 vs 1).0 vs 1
  • Does not include a passive radiator
    Audio Pro Addon C3 does not include a passive radiator, while the average portable speaker includes a passive radiator.
    What it is: Shows whether passive radiators are used to reinforce bass output.
    When it matters: When enhanced bass response from a compact enclosure matters.

    Importance: LOW

    Good value: yes

    Audio Pro Addon C3 does not include a passive radiator, while the average portable speaker includes a passive radiator.
  • 1 Bluetooth levels older
    Audio Pro Addon C3 has an older Bluetooth version than the average portable speaker (4 vs 5.0).
    Bluetooth version: 4.0.
    What it is: The generation of Bluetooth supported by the speaker hardware.
    When it matters: When compatibility and efficiency with newer Bluetooth devices matter.

    Importance: LOW

    Good value: >= 5.0

    Audio Pro Addon C3 has an older Bluetooth version than the average portable speaker (4 vs 5.0).4.0 vs 5.0
  • 5 °C higher minimum operating temperature
    Audio Pro Addon C3 has a higher minimum operating temperature than the average portable speaker (5 °C vs 0 °C).
    What it is: The lowest ambient temperature recommended for normal operation.
    When it matters: When the speaker must work reliably in colder conditions.

    Importance: LOW

    Good value: <= -10 °C

    Audio Pro Addon C3 has a higher minimum operating temperature than the average portable speaker (5 °C vs 0 °C).5 °C vs 0 °C
  • Fewer Wi-Fi band options
    Audio Pro Addon C3 lists 2.4 GHz for Wi-Fi bands, while the average portable speaker lists 2.4 GHz/5 GHz.
    Wi-Fi bands: 2.4 GHz.
    What it is: The wireless frequency bands the speaker can use over Wi-Fi.
    When it matters: When the speaker must connect to both older and newer Wi-Fi networks.

    Importance: LOW

    Good value: 2.4 GHz / 5 GHz

    Audio Pro Addon C3 lists 2.4 GHz for Wi-Fi bands, while the average portable speaker lists 2.4 GHz/5 GHz.2.4 GHz vs 2.4 GHz/5 GHz
  • 1 fewer USB ports
    Audio Pro Addon C3 has fewer USB ports than the average portable speaker (0 vs 1).
    Physical USB ports: 0.
    What it is: The number of USB ports available on the speaker.
    When it matters: When several wired accessories or storage devices need USB connections.

    Importance: LOW

    Good value: >= 1

    Audio Pro Addon C3 has fewer USB ports than the average portable speaker (0 vs 1).0 vs 1
  • Worse ingress protection
    Audio Pro Addon C3 has worse ingress protection than the average portable speaker (IPX4 vs IPX5).
    What it is: The ingress protection code for dust and water resistance.
    When it matters: When dust and water protection need to match the intended environment.

    Importance: HIGH

    Good value: IP67+

    Audio Pro Addon C3 has worse ingress protection than the average portable speaker (IPX4 vs IPX5).IPX4 vs IPX5
Total
Overall
Audio
Connectivity
Durability
Design

Graphic comparison of Audio Pro Addon C3 and other products in the Portable Speakers category

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Third-party reviews

United Kingdom
amazon
4.3
288 Reviews
United States
Amazon_logo.png
3.9
281 Reviews

(Reviews last updated: August 2026)

What customers like about Audio Pro Addon C3?

  • Excellent sound quality with deep, punchy bass, crisp highs, and clear mids for its size.
  • Dual connectivity with support for both stable Wi-Fi streaming and Bluetooth playback.
  • Integrated multi-room functionality allows seamless linking with other Audio Pro speakers.
  • Good battery life offering up to 15 hours of playback at half volume.
  • Convenient top-panel physical preset buttons for quick access to radio stations and playlists.
  • Premium Scandinavian design featuring a genuine leather carrying handle and aluminium controls.

What customers dislike about Audio Pro Addon C3?

  • Lacks an IP water or dust resistance rating, making it risky to use near pools or in bad weather.
  • The official Audio Pro control app can be clunky, unintuitive, or difficult to configure.
  • Uses older Bluetooth 4.0 technology rather than modern, longer-range Bluetooth versions.
  • Missing a built-in USB charging port to power smartphones, unlike its predecessor (the T3).
  • Noticeably less sub-bass impact and raw power when compared directly to the larger, mains-powered C5 or C10 models.
  • Non-linear volume steps where the audio output level only seems to ramp up drastically past the 50% mark.

Expert reviews

W
whathifi.com
12/10/2022
Summary of the review
Audio Pro Addon C3Go to product viewer dialogue for this item. review - What Hi-Fi?
L
loudersound.com
08/11/2018
Summary of the review
Audio Pro Addon C3 speaker review - Louder Sound
H
hifitest.de
14/08/2026
Summary of the review
Technical Specifications Stereo Speaker - Audio Pro Addon C3
(Translated)Show original
A
afdigitale.it
09/07/2018
Summary of the review
Audio Pro Addon C3: The Multi-Room Speaker Done Right
(Translated)Show original

Video reviews

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