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Louder. Clearer. Smarter!
Where the TS3 series exceeded expectations, the TS4 completely redefines them. The TS4 series builds on the legacy of the best-selling TrueSonic speakers, delivering more power, clearer sound, and enhanced Bluetooth® features like streaming, speaker linking, and app control. The new TS4 series is compact, lightweight, and designed for reliability, making it easy to deliver great live sound at any event.
True Sonic Power
Whether you need powerful vocal reinforcement or club-shaking bass performance for a DJ set, the TS4 speakers deliver loud, clear, room-filling sound for any application. With a 15" woofer and a 1.4" compression driver, the TS415 provides 2500 watts of class-leading power and clarity alike.
Free Alto App for Remote Configuration and Control
The free Alto app, available for both Android and iOS, offers convenient remote control of Bluetooth® levels, speaker usage modes, custom EQ, and sub size selection. Additionally, the True Wireless Stereo connection can be configured via the app to save setup time.
Built-In 3-Channel Mixer
Each TS4 features an integrated 3-channel mixer with two mic/line input channels and a dedicated Bluetooth® channel. The mic/line channels have XLR/TRS combo jacks and can be used with microphones, instruments, and line-level signals without extra hardware or settings. Just plug them in at the rear and you’re ready to go.
Easy Bluetooth® Streaming and Speaker Pairing
The TS4 is the ideal high-power streaming solution. Thanks to built-in Bluetooth® connectivity, you can easily pair your laptop, phone, or tablet and enjoy music in no time. With the True Wireless Stereo feature, Bluetooth® audio signals can be transmitted in perfect stereo to two TS4 speakers without any cables.
DSP Modes for Optimal Sound in Every Application
With the TS4’s three preset "Speaker Use" modes, you can optimize the speaker for any application, ensuring great sound at the push of a button. For even more control over your sound, you can configure a custom EQ in the Alto app and remotely adjust settings from anywhere in the venue. You can even save your preferred custom EQ setting directly on the TS4 for easy recall.
Versatile and Reliable
From the premium drivers to the fanless Class-D amplifiers, every aspect of the TS4 series is designed for maximum reliability, whether for mobile gigs and performances or fixed installations. Each speaker features a lightweight, sleek black-box design that can be used in various ways—freestanding, as a wedge monitor, mounted on a stand, or flown using the integrated hanging points.
Level up your live sound!
Features
- 2500 watts for powerful performance
- Alto app (iOS/Android) for remote configuration and control
- Bluetooth audio streaming directly from the device
- Built-in DSP with 4 speaker usage modes (including custom EQ via app)
- True Wireless Stereo speaker connection via Bluetooth
- Integrated 3-channel mixer with two XLR/TRS combo inputs, mic/line switch, and independent gain controls
- XLR mix output, controls for speaker use and sub size
- 15" woofer with 2.5" high-temperature voice coil
- 1" tweeter with 1.4" voice coil
- Lightweight enclosure for easy transport, setup, and installation
- Versatile design—stand mounting, floor monitor, or flown application with integrated M10 hanging points
- Powerful and efficient fanless Class-D amplifiers for cleaner, quieter operation and higher long-term reliability
- Designed in the USA
Technical Specifications
- Output power: 2500 watts
- Woofer: 15.0" driver, 2.5" (63 mm) high-temperature voice coil. 1x 800 W RMS @ 2 Ohm
- Tweeter: 1.0" exit ceramic driver with 1.4" (35 mm) voice coil. 1x 450 W @ 4 Ohm
- Crossover frequency: 2 kHz
- Maximum sound pressure level: 135 dB (peak), 132 dB (continuous) (dB-SPL @ 1 m)
- Frequency range: 33 Hz - 20 kHz (-10 dB)
- Coverage angle: 90° horizontal x 60° vertical (nominal)
- Connections: 2x XLR/TRS combo input (balanced), 1x XLR output (left), 1x IEC power cable input
- Line input impedance: 10 kOhm balanced, 20 kOhm unbalanced; Mic: 1.2 kOhm
- Line gain/volume control range: -8 to 0 dB, +4 dBu nominal, +10 dBu max output
- Mic/instrument gain/volume control: -8 to +50 dB
- USB charging port: 5V 2.1 A
- Controls:
- Power switch
- 2x gain knobs
- 2x mic/line switches
- Bluetooth volume control
- Pairing button
- Stereo link button
- Sub size button
- Speaker use button - Indicators: Input channel signal/limit/clip LED (green = signal) (yellow = limiter) (red = clipping)
- Bluetooth LED (blue)
- Link LED (orange)
- 4x DSP presets LED (green)
- 3x sub size LED (green) - Power connection: IEC
- Voltage: 100-120V, 50/60Hz; 220-240V, 50-60Hz
- Power consumption: 900 watts
- Fuse: 100-120V T10AL AC250V; 220-240V T5AL AC250V
- Protection: Electronic clip, thermal protection, and driver overload protection
- Enclosure: Injection-molded cabinet and perforated metal grill
- Mounting/installation: Standard 36 mm speaker flange, flown application, hung with integrated M10 points or as wedge monitor
- Operating temperature: -10 °C to 45 °C
- Dimensions (HxWxD): 643 x 418 x 402 mm
- Weight: 17.2 kg
Scope of delivery
- 2 x Alto TS415 active speakers
- 2 x power cables
- 2 x software download cards
Suitable accessories (Not included in the delivery.)
Specification
- Product number 00090095
- Weight in kg 17,2
- Power RMS (Watts) 5000
- Subwoofers 15 Zoll
- Microphone input Yes, without phantom power
- Outputs XLR
- Multifunctional chassis Yes
- Speakers full range -
- Inputs 6.3mm Klinke, Bluetooth, XLR
- Tweeters 1 Zoll
- Speakers mid range -
- Colour Black
Reviews
| 5 Stars |
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7 |
| 4 Stars |
|
1 |
| 3 Stars |
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0 |
| 2 Stars |
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0 |
| 1 Star |
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0 |
A verification of the ratings has taken place as follows: Only customers who are registered in our online store and have actually purchased the product from us can submit a rating for the item in the customer account.
This rating has been translated automatically. Original language
Due to the direct radiation of the highs, a very good perception was achieved even at the end of the hall (approx. 25m). Mids and bass were not perceived as unpleasant by the audience, neither at the edge of the stage nor in the rest of the hall. Feedback with 4 headsets and a handmike did not occur. Despite the at times very loud audience, the full power of the speakers did not have to be used, so there were still reserves.
I cannot confirm a higher sensitivity for scratches. Due to the silky matt surface, a scratch is naturally easier to see than with a rough surface. I therefore use sleeves for transport. However, a top sound is important for me.
Conclusion on my part: Everything went well. Next time they are used again.
Variant Alto TS408 Stereo Set
This rating has been translated automatically. Original language
However, the wattage specifications on the speakers suggest more power than actually comes out. Unfortunately, I have not yet found a logical explanation for this anywhere.
But anyway, I give it four stars. Let's see how they perform in live operation.
Variant Alto TS412 Stereo Set
This rating has been translated automatically. Original language
Variant Alto TS408 Stereo Set
This rating has been translated automatically. Original language
Variant Alto TS412 Stereo Set
This rating has been translated automatically. Original language
Questions about product
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Financing
easyCredit Ratenkauf
- 2 to 60 months term
- Financing from 20,50 € / month
- More information about installment purchase
ConsorsFinanz Finanzierung
- 6 to 72 months term
- 0% financing for 69,75 € per month
- More information on financing
| Operating instructions / manual |
| 3 Year warranty | |
| 30 Day Money Back | |
| Price Match Guarantee | |
| Over 2.000.000 satisfied customers |
The hotline is currently not manned. You can reach us again on Friday, 22.05.2026 at 09:30.
| Friday | 09:30 - 18:00 | |
| Saturday | 09:30 - 13:30 | |
| Monday | Closed |
Different opening times |
| Tuesday | 09:30 - 18:00 | |
| Wednesday | 09:30 - 18:00 | |
| Thursday | 09:30 - 18:00 |


