Alto active subwoofers
Alto, Active Subwoofers for Sale
This page shows Alto active subwoofers, the TS315S, TX18S and TS18S 18-inch active PA subwoofers.
- TS315S active subwoofer
- TX18S 18-inch subwoofer
- TS18S 18-inch subwoofer
- Active PA low end
3 products



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How to choose
Choose based on how much low end your room or event actually needs.
Beginner
A beginner adding their first subwoofer should start with one TS315S paired under a set of active tops, rather than assuming more subs are always better. Position it close to the stage and check that it is not overpowering the vocals.
Intermediate
An intermediate user running dance-focused events can add a TX18S or TS18S for stronger low end, especially in larger rooms. Check phase alignment with the tops during soundcheck to avoid cancellation.
Expert
Experienced engineers covering larger venues may run multiple TX18S or TS18S units alongside TS315S subs for consistent low end across the room. Plan subwoofer placement to avoid uneven bass buildup and inspect power connections regularly on units that travel often.
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About Alto in Active Subwoofers
Active subwoofers add powered low frequency output to a PA system, giving music and speech more weight in bigger rooms. People buy Alto subwoofers to pair with their active speakers when a show needs more bottom end.
This page holds Alto's TS315S, TX18S and TS18S active subwoofers.
Why Trust OneStopMusic?
As the online home of Marshall Music Pretoria, we've helped countless musicians find their sound. Something small enough for a bedroom setup? No problem. Big enough for a full stage? It's here — and we deliver anywhere in South Africa.
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Buying Active Subwoofers, Alto in South Africa
Looking for Active Subwoofers, Alto? Everything on this page is priced in Rand and held in real stock at OneStopMusic — the online store of Marshall Music Pretoria. We deliver anywhere in South Africa, usually within 2–4 working days, and you are welcome to try the gear in person at our Menlo Park store. Not sure which model is right for you? Call 012 991 6077 — our team plays this gear every day and will give you honest, pressure-free advice.
