Alto TS415 15-Inch Powered PA Speaker

Alto TS415 15-Inch Powered PA Speaker

The Alto TS415 is a 15-inch two-way powered loudspeaker built for performers, DJs and venues that need serious output from a single, easy-to-carry cabinet. A bi-amped Class D amplifier delivers 2,500 watts of peak power — 1,250 watts continuous RMS — driving a 15-inch woofer and a 1-inch ceramic compression driver with headroom to spare. Maximum SPL reaches 135 dB peak, yet the enclosure weighs 17.2 kg and needs no cooling fan, so it runs quietly between songs and announcements.

Key features

• 2,500 W peak (1,600 W LF + 900 W HF) bi-amped Class D power, fanless cooling
• 15-inch woofer with 2.5-inch high-temperature voice coil
• 1-inch exit ceramic compression driver with 1.4-inch voice coil
• Maximum SPL of 135 dB peak and 132 dB continuous at 1 m
• Built-in 3-channel mixer with two XLR/TRS combo inputs and mic/line switches
• Bluetooth streaming with True Wireless Stereo linking to a second TS4 speaker
• Onboard DSP with Speaker Use modes and Custom EQ via the free Alto App

Power and drivers

The low-frequency section uses an 800 W RMS amplifier behind a 15-inch driver, while a separate 450 W RMS amplifier handles the ceramic high-frequency driver. Splitting the power this way keeps vocals clear when the bass is working hard. Frequency response runs from 44 Hz to 20 kHz within +/-3 dB, with usable extension down to 33 Hz, and the 2 kHz crossover hands over cleanly between the drivers. A 90 by 60 degree horn spreads that output evenly across the audience instead of concentrating it in a narrow beam.

Mixer, Bluetooth and app control

Two combo inputs accept microphones or line-level sources, each with its own gain control, and the third channel streams audio over Bluetooth. A pair of TS415 cabinets can link in True Wireless Stereo, so a phone becomes the music source for a complete stereo rig without a cable run. The Alto App for iOS and Android adds remote control of the Custom EQ, Sub Size settings and Speaker Use modes from the listening position, which makes tuning a room far quicker than walking back to the cabinet. An XLR link output passes the mix on to another speaker, and a 5 V USB port charges a phone or tablet during the show.

Built for the road and the install

The injection-moulded enclosure works three ways: upright on a 36 mm pole socket, tilted back as a wedge monitor, or flown from integral M10 suspension points. Electronic clip, thermal and transducer overdrive protection guard the drivers during long sets, and the fanless design removes a common failure point while keeping stage noise down. Whether the job is a wedding, a club night, a place of worship or a rehearsal room, the TS415 covers it with one box per side and a mixer built in.

For buyers comparing 15-inch powered speakers, the TS415 stands out for combining high clean output, a genuine three-channel mixer and app-based DSP in a cabinet one person can load in and set up alone.