Alto Professional TS15S Active Subwoofer

Alto Professional TS15S — 2500W Powered Subwoofer for Deep Low-End Extension

Adding a dedicated subwoofer to a PA system brings the full spectrum of sound to life, delivering genuine impact and weight that smaller speakers can't achieve. The Alto Professional TS15S delivers 2500 watts of peak Class D power to a 15-inch driver reaching as low as 36 Hz. Designed and tuned in the USA, it anchors low-frequency content for bands, DJs, permanent installations, and mobile sound systems where bass truly matters.

Selectable DSP Modes and Phase Alignment for Any Setup

Three EQ tunings — Off, Live, and DJ — provide fast tonal changes on demand. For system alignment, a four-position phase switch (0°/90°/180°/270°) corrects timing mismatches between the subwoofer and tops regardless of stage layout.

Amplifier Power and Transducer Build

Low-frequency output depends directly on amplifier headroom and driver construction.

• Peak Power: 2500 W — high SPL performance is possible without risking clipping, even during extended use.
• Driver: 15-inch (381 mm) woofer with 3-inch (76 mm) high-temperature voice coil is built to handle thermal stress when running at high levels for long periods.
• Expect maximum output up to 132 dB at 1 m, which is plenty for mid-sized event spaces.

Frequency Range and Enclosure Design

Getting usable bass depends on both low extension and a well-designed cabinet.

• With a frequency response of 36 Hz – 110 Hz (−3 dB), kick drums, bass guitars, and synths all get the foundation they need.
• Enclosure: Internally braced front-ported MDF cabinet with mark-resistant splatter-spray finish suppresses panel vibration for artifact-free bass.

Input/Output Routing and System Integration

Plug into any setup without extra gear. This model provides versatile connectivity and expansion options for demanding users.

• Inputs: 2 × XLR + 1/4-inch (6.35 mm) combo jacks — accepts both balanced and unbalanced signals from mixers or processors.
• Use the 2 × XLR thru outputs for daisy-chaining to tops or additional subs, eliminating the need for external splitters.
• The 36 mm pole socket on top makes it easy to elevate satellite speakers above the sub for clear audience coverage.