Lightweight enclosure for easy transport, set up and installation
Versatile design - pole-mountable, wedge monitor or flown application with integral M10 suspension points
Powerful and efficient class D amplifiers with fanless cooling design to run cleaner, quieter and with greater long-term reliability
Designed and tuned in the USA
TrueSonic TS4 from Alto Professional
Louder. Clearer. Smarter.
Where TS3 exceeded expectations, TS4 redefines them completely.
Building on the legacy of our best-selling TrueSonic speakers, the TS4 Series delivers increased power, clearer sound, and advanced Bluetooth functions including streaming, speaker linking, and App control.
Compact, lightweight, and designed for reliability, the new TS4 Series makes it simple to get great live sound at every event.
True Sonic Power
Whether you need a powerful vocal PA or club-shaking bass performance for a DJ set, TS4 speakers deliver loud, clear, room-filling sound for any application.
With a 12-inch woofer, and a 1.4-inch compression driver, TS412 delivers 2500W of class-leading power and clarity in equal measure.
FREE Alto App for remote configuration and control
Available free for both Android and iOS, the Alto App gives hands-on remote control over Bluetooth levels, Speaker Use Modes, Custom EQ and Sub Size selection. Further, True Wireless Stereo linking can be configured remotely via the app to save time during setup.
Built-In 3-channel mixer
Every TS4 features an integrated 3-channel mixer, with two Mic/Line input channels and a dedicated Bluetooth channel. The 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 adjustment. Just plug straight into the rear panel and you're up and running.
Simple Bluetooth Streaming & Speaker Linking
The ideal high-powered streaming solution, TS4's built-in Bluetooth connectivity makes it easy to pair your laptop, phone or tablet and get the music pumping in no time at all.
With the True Wireless Stereo function you can stream Bluetooth audio to two TS4 speakers in perfect stereo without the need for any cables.
DSP Modes for the best sound in every application
TS4's three preset "Speaker Use" modes let you optimize the speaker for any application, so you'll get great sound every time at the touch of a button. For even more control over your sound, you can configure a Custom EQ within the Alto App and remote adjust the settings from any listening point in the venue. You can even save your favorite Custom EQ setting direct to the TS4 for easy recall whenever you need it.
Versatile and Reliable
From the high-quality drivers to the fanless class D amplifiers, every aspect of the TS4 Series has been designed for superb reliability, whether used for mobile gigs and performances or fixed installation.
Each speaker features a lightweight, sleek, black box design that can be used as the application demands - freestanding, as a wedge monitor, pole-mounted or suspended via the integrated suspension points.
Level up your live sound. Choose Alto Professional's TS4 Series.
1 inch (25.4 mm) titanium diaphragm compression driver, 1.4 inch (35 mm) coil
Peak Power Capacity
2500 W peak (1600 LF + 900 HF)
Power-handling nominal (RMS)
1250 W continuous RMS (800 LF + 450 HF)
Impedance
LF: 2 ohm, HF: 4 ohm
Maximum Peak SPL
132 dB peak @ 1m
Frequency Response
53 Hz – 20 kHz (±3 dB)
Frequency Range
44 Hz – 20 kHz (-10 dB)
Crossover Frequency
2 kHz
Horizontal Coverage Angle
90°
Vertical Coverage Angle
60°
Enclosure Material
Injected Molded Enclosure and Perforated Metal Grille
Mounting Options
Standard 36 mm pole socket, flown application with integral M10 suspension points, wedge monitor position
Setup Configuration
Integrated 3-channel mixer with dual XLR 1/4-inch combo inputs, mic/line switches and independent level controls. XLR Mix output, Speaker Use, and Sub Size Controls. True Wireless Stereo linking via Bluetooth. Alto App (iOS/Android) for remote control.
Connectors
(2) XLR+1/4" (6.35 mm) TRS combo inputs (Balanced), (1) XLR output (Link), (1) IEC power cable input, USB charging port 5V 2.1A
Inputs
2 × XLR+1/4" (6.35 mm) TRS combo inputs (Balanced), 1 × USB charging port 5V 2.1A
Inputs
2 × Mic/Line combo inputs (XLR/TRS), 1 × Bluetooth 5.0 (A2DP), Input Impedance: Line 10 KΩ balanced / 20 KΩ unbalanced, Mic 1.2K
Outputs
1 × XLR output (Link)
Outputs
1 × XLR Mix output, 1 × XLR Link output
Specification
2500 W peak (1600 LF + 900 HF), 1250 W continuous RMS (800 LF + 450 HF). 12" driver, 2.5" (63 mm) high-temp voice coil. 1" exit ceramic driver with 1.4" (35 mm) coil. 2 kHz crossover. 132 dB peak SPL. 53 Hz – 20 kHz freq response. 90°H × 60°V coverage. Class D amp with fanless cooling. M10 suspension points. 36 mm pole socket. Alto App control. Bluetooth 5.0 TWS linking. 3 Speaker Use modes + Custom EQ via App.
Indicators
Input Channel Signal/Limit/Clip LED (Green=Ch1/2 Signal, Yellow=Ch1/2 Limiter, Red=Ch1/2 Output Clipped), Bluetooth LED (Blue), Link LED (Orange), 4 DSP Presets LED (Green), 3 HPF LED (Green)
Amplifier Type
Class D, fanless cooling
Controls
Power switch, 2 gain control knobs (1 per input), 2 Mic/Line switches, Bluetooth volume control encoder, Pairing button, Stereo Link button, Sub Size button, Speaker Use button
LF Driver Power Amp
1 × 800 W RMS @ 2 Ω
HF Driver Power Amp
1 × 450 W @ 4 Ω
Consumption
1100 W
Power Requirements
100-120V, 50/60Hz; 220-240V, 50-60Hz
Power Supply
IEC
Height
23.9 inch (606.5 mm)
Width
13.9 inch (353.5 mm)
Depth
13.8 inch (350.5 mm)
Weight
33 lbs (15 kg)
Dimensions
23.9 × 13.9 × 13.8 inch / 606.5 × 353.5 × 350.5 mm (H × W × D)
