Alto Professional TS15S – Powered Subwoofer

The Alto Professional TS15S powered subwoofer delivers tight, punchy, and controlled low-end reinforcement for modern PA systems. When paired with full-range speakers, it adds the depth and weight needed for a complete and balanced sonic experience.

From concert halls to clubs and houses of worship, every performance benefits from perfectly blended highs, mids, and extended lows.

The Most Powerful Subwoofer Yet

With an impressive 2500 watts of peak power, the TS15S is Alto Professional’s most powerful subwoofer to date. Its high-efficiency Class D amplifier ensures reliable, impactful bass night after night.

Designed for professionals who demand dependable performance in changing environments.

Built for Serious Performance

The internally braced MDF cabinet minimizes unwanted resonance, delivering tight and defined bass without rattles.

Featuring a premium 15” driver with a 3” high-temperature voice coil, the TS15S is built to withstand the rigors of both permanent installations and mobile live setups.

Flexible System Integration

User-selectable EQ modes
Phase Alignment function
Dedicated input and output paths
Seamless integration with Alto Professional full-range loudspeakers

Technical Specifications

Output Power: 2500W peak @ 4Ω

Driver: 15” (381 mm) woofer, 3” voice coil

Frequency Response: 36 Hz – 110 Hz (-3 dB)

Frequency Range: 31 Hz – 123 Hz (-10 dB)

Maximum SPL: 132 dB (@1m)

Connections:

(2) XLR + 1/4” combo inputs
(2) XLR outputs
IEC power input

Protection: Electronic clip, thermal & overdrive protection

Enclosure: Internally braced MDF, 36 mm pole mount

Dimensions: 541 × 523 × 627 mm

Weight: 39.51 kg

Proel IS S115A

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