PA Systems Guide
Not every office needs the same setup. The right PA system depends on how your space works, how many people use it, and what you actually need it to do. Here’s how to think through it.
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West London’s office landscape is genuinely varied. You’ve got large corporate floors in Hammersmith, busy co-working spaces in Chiswick, industrial-unit conversions in Hayes, and everything in between across Ealing, Acton, Hanwell, and Southall. The audio requirements for each of those spaces are different — sometimes quite significantly.
This guide isn’t a product list. It’s a breakdown of what different office setups actually need from a PA system, what to look for when specifying one, and how to avoid paying for things you don’t need.
The Four Main Things Offices Use PA Systems For
Most office PA installations cover one or more of these four functions. Understanding which ones apply to your space is the starting point for everything else.
Use case 01
Background music
Consistent, low-level audio across the workspace. Reduces the sense of silence in open-plan offices and masks conversation between desks.
Use case 02
Speech & conferencing
All-staff announcements, presentations, or integrated conferencing audio in meeting rooms and boardboards.
Use case 03
Zoned audio
Independent control of audio in different areas — reception plays something different from the breakout room, which can be muted entirely during meetings.
Use case 04
Emergency announcements
Integration with fire alarm or voice alarm systems so critical announcements override everything else automatically.
Most small offices only need the first one or two. Larger or multi-floor spaces almost always benefit from zoned audio. And any commercial premises with more than a handful of staff should at least consider how emergency announcements will work — it’s often a compliance requirement, not just a nice-to-have.
Background Music: What Actually Matters
For background music in an open-plan office, the goal is even coverage at a consistent level — not loud, not impressive, just reliably present. The equipment that achieves this is usually modest: ceiling-mounted speakers distributed across the space, fed from a simple amplifier with a volume control per zone.
What catches people out is speaker placement. Too few speakers means you have to push volume higher to cover the room, which creates hot spots near each speaker and dead zones in between. A well-designed system uses more speakers at lower volume — the sound is everywhere, but it’s never intrusive.
Open-plan offices with hard floors, glass partitions, and exposed ceilings are acoustically difficult. Sound bounces around rather than being absorbed. Good speaker placement and some basic DSP (digital signal processing) make a significant difference to how the system sounds in practice.
For a typical West London office floor — say, a 200–400 sq ft open-plan space — four to eight ceiling speakers is a reasonable starting point, depending on layout. Smaller enclosed offices may only need one or two.
Speech and Conferencing Audio
This is a different requirement entirely, and it’s worth treating it separately even if the same system handles both.
For all-staff announcements, you need the PA to be able to override background music and reach everyone clearly — including people in meeting rooms, kitchens, and toilets if the brief requires it. That means the system needs to be properly zoned, with a microphone input at a control point and enough amplifier headroom to speak over ambient noise.
For conferencing within meeting rooms, the conversation is usually about integrating with video conferencing platforms rather than a traditional PA setup. Ceiling microphone arrays, DSP echo cancellation, and the ability to connect to a laptop via USB or Bluetooth are what matter here — it’s a different product category, though some systems bridge both.
Worth separating out
Don’t try to solve conferencing and background music with the same single system unless it’s been specifically designed to do both. Hybrid systems exist, but they add complexity and cost. For most offices, two simpler systems that each do one thing well is a better outcome than one complicated system doing both badly.
Zoned Audio: When You Need It and What It Involves
Zoning means dividing the building into independently controllable audio areas. Reception might play branded background music. The open-plan floor has a different playlist. Meeting rooms can be muted during calls. The breakout kitchen does its own thing.
It sounds straightforward, but the technical implementation varies significantly depending on how many zones you need and how you want to control them. Here’s a rough guide.
| Setup | Zones | Control method | Best for |
|---|---|---|---|
| Basic zoned system | 2–4 | Wall-mounted volume controls | Small offices, simple requirements |
| Mid-range zoned system | 4–8 | Wall panels + app control | Multi-room offices, co-working spaces |
| Networked audio system | 8+ | Central software, remote management | Large floors, multi-storey buildings |
The jump from basic to networked isn’t just about the number of zones — it’s about how much flexibility you need day-to-day. A networked system can be adjusted remotely, scheduled automatically, and reconfigured without an engineer visiting. For a business that changes its layout regularly or has multiple people managing different areas, that flexibility is genuinely useful.
Emergency Announcements and Voice Alarm Integration
This is the area most offices don’t think about until someone raises it during a building compliance review — at which point it becomes urgent.
Depending on the size and occupancy of your premises, you may be legally required to have a voice alarm system capable of delivering intelligible emergency announcements to all occupied areas. This is separate from a fire bell or sounder — it’s a system that can broadcast a clear voice message instructing occupants what to do.
The good news is that a well-designed PA system can incorporate this from the outset. Emergency announcement inputs can be integrated so that any PA trigger from the fire alarm panel automatically overrides all zones at full volume. If you’re planning a new PA installation, it’s worth discussing this at the design stage — retrofitting it later is possible but more complicated.
If your building already has a voice alarm system installed, check whether the existing PA can integrate with it before specifying something new. Sometimes the answer is a simple input connection. Sometimes it isn’t — but it’s always worth asking.
What to Actually Look for When Specifying a System
Regardless of which use cases apply to your office, these are the things worth paying attention to when reviewing any PA specification or quote.
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Speaker coverage, not just speaker count
The number of speakers matters less than where they’re placed. Ask to see a coverage diagram showing how the system will sound across the floor plan — not just a list of equipment.
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Amplifier headroom
A system running at maximum volume to cover the space will distort and wear out faster. The amplifier should be rated comfortably above the load it’s driving — typically 1.5 to 2x the speaker load.
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DSP included or separate
Digital signal processing handles equalisation, level matching between zones, and acoustic correction for the room. Some amplifiers include it; others need a separate processor. Either is fine — just check it’s in the spec.
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Ease of daily use
Whoever manages the office should be able to operate the system without training. If the control interface requires a manual to adjust the volume in reception, it’s the wrong interface for the job.
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Future-proofing
Office layouts change. Check whether the system can accommodate additional zones, different sources, or integration with future technology — or whether adding anything means starting again.
A Note on West London Specifically
We’re based in Hanwell and have installed PA systems across West London for over ten years — from small offices above shops in Acton to large commercial floors in Hammersmith, industrial units in Southall and Hayes, and co-working spaces throughout Ealing and Chiswick.
The areas vary quite a bit in terms of building stock. Older buildings in Ealing and Chiswick often have suspended ceilings that make cable runs straightforward but acoustic challenges more complex. Industrial conversions in Southall and Hayes tend to have the opposite problem — easy acoustics, harder cable routing. Modern commercial builds in Shepherd’s Bush and Hammersmith are generally the most straightforward to work with.
None of this dramatically changes the outcome, but it does affect how a job is approached — and it’s the kind of thing worth knowing before an engineer turns up on-site.
If you’re trying to work out what your office actually needs — or you’ve already had a quote and want a second opinion on what’s been specified — we’re happy to take a look.