Alto TS318S Active Subwoofer


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With an impressive 1000w of continuous power and six discreet output modes for ideal matching, Alto build on their successful subwoofers with the brand new and improved 3 series.




Add a Rock-Solid Foundation to Your Music

There are times when your sound system needs additional low-frequency output and “punch.” For those situations, Alto
Professional proudly offers the Alto TS318S Active Subwoofer. This subwoofer extends the bass response of virtually any full range
speaker, relieving that speaker of the difficult task of having to reproduce the low bass frequencies. The result? A
system with stunning wide-range response characterised by dramatic, impactful low frequencies and effortless, undistorted
mids and highs. The listening audience will hear everything with perfect clarity, from the lowest bass synth tones to the
highest percussion bells and everything in between.

Premium Components

TS318S features a rugged, long-excursion woofer mounted in a solidly-braced ported enclosure, computer-optimised for
powerful low-frequency performance. The enclosure itself is made from a dense wood composite. This strong, resonant free
material has virtually perfect acoustic characteristics, which ensures that the subwoofers’ output is always clear and
impactful. Conventional enclosures with flex-prone thin metal or plastic walls actually rob the speaker of acoustic impact by
dissipating the driver’s energy as cabinet vibration. A sturdy, braced wood composite enclosure doesn’t waste the driver’s
motion as cabinet resonance.

The Perfect Match

Strong, clear output is only half the battle, however in order for a subwoofer to be part of an ideal speaker system, it has to
blend seamlessly with the companion speaker. This is where the Alto Professional’s TS318S truly excels. All TS300-series
subwoofers have a choice of six selectable DSP output modes so the subwoofer’s frequency response and crossover
frequency are perfectly-matched to the speaker it’s being used with. Two of these six output options match the subwoofer
perfectly with Alto 3 and TS3 full-range speakers, while the other four output options ensure a perfect match even if you
are using non-Alto full-range speakers. For the ultimate in system configuration flexibility, you can also choose Hi-Pass or
Bypass mode.
All information subject to change

Precision-Engineered for Performance

Our computer design techniques feature advancements such as Finite Element Analysis (FEA), which enables us to optimise
the speaker’s magnetic structure and maintain a tight voice coil gap for maximum sensitivity. Our voice coils themselves
have extremely tight windings that ensure maximum utilisation of the input signal and our adhesives exhibit unrivalled
consistency and durability under high temperature conditions for unsurpassed system reliability. TS318S features an onboard
2000-watt amplifier (1000 watts continuous) with proprietary limiting circuitry that provides electronic clip, thermal and
transducer overload protection, ensuring that the system always sounds clean and clear, no matter how hard it’s pushed.


• Driver: 18-inch with high-temperature, long-throw voice coil
• Amplifier: 1000W continuous, 2000W peak Class D power
• XLR outputs, with six discreet output modes for ideal matching with companion speaker
• Extended LF switch for increased EQ control
• Electronic clip, thermal and transducer overdrive protection
• Integrated 35mm pole socket
• M10 suspension points
• Rugged, mar-resistant splatter-spray finish always looks good, even with heavy use
• Designed and tuned in the USA


Output Power 2000W peak, 1000W continuous
Transducer Low 18” (457mm) woofer
Frequency Response 44Hz – 86Hz (- 3dB)
Frequency Range 37Hz – 97Hz (-10dB)
Maximum SPL 133dB (@ 1m)
Connections (2) XLR+¼” (6.35mm) inputs; (2) XLR outputs; (1) IEC power cable input
External Controls Volume control, signal/clip limiter with LED, DSP output mode switch with LED, polarity-reverse switch with LED, extended
low-frequency switch with LED, power switch with LED
Electronic Protections Electronic clip, thermal and transducer overdrive protection
Enclosure Internally braced MDF cabinet; 36mm mounting pole socket on top panel
Power Connection Standard IEC cable
Input Voltage 110–120, 220–240 VAC; 50/60Hz
Consumption 1000W
Fuse T10AL AC250V (110–120V) or T5AL AC250V (220–240V)
(height x width x depth)
26.8” x 21” x 24.7” / 680 x 533 x 628mm
Weight 86.4 lbs. / 39.2kg