TrueSonic bi-amplified speaker with bluetooth, DSP and Alto Professional TS4 App control
louder, clearer, smarter
Where the TS3 exceeded expectations, the TS4 completely redefines them.
Building on the heritage of our best-selling TrueSonic speakers, the TS4 Series offers increased power, clearer sound and advanced Bluetooth features including streaming, speaker linking and app control.
Compact, lightweight and designed to be reliable, the new TS4 series makes it easy to get quality live sound for every event.
Real sonic power
Whether you need powerful vocal PA or club-shaking bass performance for a DJ set, TS4 speakers deliver loud, clear, room-filling sound for any application.
With an 8-inch woofer and a 1.4-inch compression driver, the TS408 delivers 2000W of power and clarity in equal measure.
FREE Alto app for remote configuration and control
Available for free on Android and iOS, the Alto App provides remote control of Bluetooth levels, speaker usage modes, custom EQ and subwoofer size selection. Plus, the True Wireless stereo link can be configured remotely 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. Mic/Line channels feature XLR/TRS combo jacks and can be used with microphones, instruments, and line-level signals without the need for additional hardware or setup. Simply plug directly into the back panel to be operational.
Simple Bluetooth streaming and pairing with speakers
The ideal high-powered streaming solution, the TS4's built-in Bluetooth connectivity makes it easy to pair your laptop, phone or tablet and stream music in no time.
Thanks to the True Wireless Stereo function, you can stream Bluetooth audio to two TS4 speakers in perfect stereo, without any cables.
DSP modes for optimal sound in every application
The TS4's three preset "Speaker Use" modes allow you to optimize the speaker for any application, so you get great sound every time, at the touch of a button. For even more control over your sound, you can set up a custom EQ in the Alto app and adjust settings remotely from any listening point in the room. You can even save your favorite custom EQ setting directly to the TS4 for easy recall whenever you need it.
Versatile and reliable
From high-quality speakers to fanless Class-D amplifiers, every aspect of the TS4 Series has been engineered for superb reliability, whether used for concerts and mobile performances or fixed installation.
Each speaker features a lightweight, sleek, black box design that can be used as needed for the application - freestanding, as a corner monitor, pole-mounted, or suspended using the built-in suspension points.
Technical characteristics
Amplification: On
Amplified: Yes
Application: Front, Back
Bluetooth: Yes
Category: PA
Controls: Bluetooth pairing button, Stereo Link button, Mic/Line switch (1 per channel), Input gain (1 per channel), Speaker Use selector, Sub size selector, Bluetooth volume
DSP: Yes
H-p diameter: 10"
Dimensions (mm): 536 x 320 x 317
Dispersion (H x V): 90° x 60°
Inputs: 2 x XLR/jack combo
Finish: Black
Cutoff frequency: 2.0 kHz
Impedance per channel: 2 ohms (LF) / 4 ohms (HF)
Base width: 36 mm
Media Player: Bluetooth
Mixer: No
Number of lanes: 2 lanes
Cutaway: Yes
Weight (kg): 11.80 kg
Max SPL pressure / peak: 130 dB
Power: 1000W
RMS / peak power: 2000 W
RMS Power: 1000W
Frequency response: 62Hz - 20kHz
Max SPL: 127dB
Outputs: XLR mix out
Speaker structure: polymer moulding
Carrying: 1 handle
Tweeter: 1"
Type: active loudspeaker
Type of enclosure protection: Power limiter, Fuse
Brand reference number:
SLT TS410
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