Alto Professional TS412 Active Loudspeaker

Alto Professional TS412 — 2,500-Watt Powered Loudspeaker for Live Sound and Mobile PA

The Alto Professional TS412 is a 12-inch two-way active loudspeaker engineered for vocalists, DJs, bands and event operators who need serious output without hauling a full rack of outboard gear. A 2,500-watt peak class-D bi-amp stage drives a 12-inch woofer and a 1.4-inch compression driver, producing 132 dB peak SPL with enough headroom to cover bars, clubs, houses of worship and small outdoor stages. The TS412 is the right choice for working musicians and mobile DJs who want a single cabinet that handles mains, monitor duty and Bluetooth playback with equal confidence.

What Sets the TS412 Apart in Its Class

Unlike many powered speakers at this tier, the TS412 ships with a built-in 3-channel mixer — two Mic/Line combo channels plus a dedicated Bluetooth channel — so a small acoustic duo or solo presenter can plug in and play without an external desk. True Wireless Stereo linking pairs any two TS4 series cabinets over Bluetooth for cable-free stereo, and the free Alto App unlocks custom six-band EQ, sub-size selection and remote Speaker Use presets from anywhere in the venue.

Power and Output — Class-Leading Wattage for the Price Tier

Headroom matters when a room fills up, and the TS412 is built to stay clean at the top of its range. The bi-amplified design dedicates separate amps to the woofer and the compression driver, which keeps vocals articulate even when the low end is working hard.

• Peak Power: 2,500 W (1,600 W LF + 900 W HF) — enough SPL for rooms up to mid-sized halls
• Continuous RMS Power: 1,250 W (800 W LF + 450 W HF) — sustained output without thermal limiting
• Maximum SPL: 132 dB peak / 129 dB continuous at 1 m — authoritative vocal projection
• Amplifier Topology: Class D, fanless cooling — quieter operation and longer component life

Drivers and Acoustic Performance — Tuned for Clarity

The driver pairing is what gives the TS412 its character: a high-temperature voice coil on the woofer for tight bass, and a ceramic compression driver for smooth, non-fatiguing highs. A 2 kHz crossover and a 90° × 60° horn deliver even coverage across the listening area.

• Low-Frequency Driver: 12-inch woofer with 2.5-inch (63 mm) high-temperature voice coil — handles kick drums and bass-heavy playback
• High-Frequency Driver: 1-inch exit ceramic compression driver with 1.4-inch (35 mm) coil — clean vocal reproduction
• Frequency Range: 44 Hz – 20 kHz (-10 dB) — full-range response without a sub for most spoken-word and music applications
• Horn Coverage: 90° horizontal × 60° vertical — wide, predictable dispersion for seated or standing audiences

Connectivity, DSP and App Control — Built for Modern Workflows

Every input a working performer needs is on the rear panel, and the DSP layer adapts the cabinet to the gig at the touch of a button. Wireless control means the engineer can walk the room and tune from the audience position.

• Inputs: 2× XLR + ¼-inch TRS combo (balanced Mic/Line) — accepts microphones, instruments and line-level sources
• Bluetooth Streaming: Yes with True Wireless Stereo linking across any TS4 series cabinet
• On-board DSP: 4 Speaker Use modes (Live, DJ, Custom, Flat) plus Sub Size selection for pairing with TS12S, TS15S or TS18S subwoofers
• Remote Control: Free Alto App for iOS and Android — custom six-band EQ, Bluetooth volume, sub size and speaker linking from the floor
• USB Charging Port: 5 V / 2.1 A — keep a phone or tablet topped up during long sets

Who the Alto Professional TS412 Is For

Solo performers, duos, mobile DJs, small bands and event hosts who want a single powered cabinet that covers mains, wedge-monitor duty and Bluetooth playback will find the TS412 a strong fit. The 15 kg molded enclosure, top-and-bottom handles and 36 mm pole socket make load-in fast for gigging musicians, while the three integrated M10 suspension points open up permanent installs in small venues and houses of worship. The TS412 is the right choice for working performers who need 132 dB of clean output, app-driven tuning and cable-free stereo linking in one road-ready box.

Alto Professional and the TrueSonic TS4 Legacy

Alto Professional built the TrueSonic line on the principle that great live sound should be accessible without a rack of outboard gear, and the TS4 Series is the next step in that evolution. Designed and tuned in the USA, the TS412 pairs a fanless class-D amp platform with Bluetooth streaming, True Wireless Stereo linking and app-based remote control — features that were reserved for higher-tier cabinets in earlier generations. Every TS4 model shares the same app, DSP architecture and cross-cabinet pairing logic, so a TS412 can be mixed into a system with TS408, TS410 or TS415 units and managed from a single phone.