PAVA and safety sound maintenance for London and the South East
Maintain everything.
Miss nothing.
Whether it is a certified voice alarm, a safety sound system or a centralised PA — every system that carries a safety message has one chance to perform. Whether it does depends entirely on what happened during every maintenance visit before that moment.
Our Manifesto
Voice alarm, safety sound and centralised PA are among the most technically demanding disciplines in building services. The standards — BS 5839-8, BS EN 50849, BS 6259, EN 54 — are detailed, specific, and genuinely complex. The test equipment required to verify a loudspeaker circuit is specialist. The fault-finding methodology takes years to develop.
Most maintenance programmes handle the control panel competently. Below that — in the loudspeaker circuits, the wiring, the coverage zones — the specialist knowledge runs out. The system is visited. Boxes are ticked. But the condition of the circuits that actually carry the safety message to the building remains unknown.
Not through any lack of professionalism.
Simply because sound system maintenance, done thoroughly,
is its own field.
That gap is where systems fail.
We exist to close that gap. For contractors who want to offer genuinely comprehensive PAVA and safety sound maintenance without building an internal capability. For facilities managers who want certainty — not reassurance — that their system will perform. For building owners who carry the accountability for what happens when the system is called upon.
These risks end here:
- ×Liability with no name on it
- ×Reports that leave every reader less certain than before
- ×Compliance gaps discovered only during an investigation
- ×Remedial work that never gets done
- ×A system whose condition nobody truly knows
- ×Circuits that pass on paper and fail in an emergency
Planned Maintenance
A maintenance visit is a snapshot. The contract is the diagnosis.
Impedance drift is how loudspeaker circuits fail — not suddenly, but gradually, measurably, across months and years. A single reading tells you where a circuit is today. The comparison with last year's reading tells you whether it is drifting, and how fast.
Because remediation work is quoted separately, there is no incentive to miss anything — and every reason to find it.
By year five, we can predict where the next fault will appear
Year-on-year impedance trending. Degradation caught before failure.
BS 5839-8 requires that all loudspeaker circuit impedances are measured and compared to the previous year's readings — ideally using the same calibrated equipment. That requirement exists for a reason: impedance drift tells you what a pass/fail check cannot.
We maintain a longitudinal impedance record for every system we look after. All measuring equipment is calibrated and traceable to National Measurement Standards.
By year three, we know a system's behaviour patterns. By year five, we can often predict where the next issue will appear. That is the difference between a compliance visit and a diagnostic Maintenance Contract — and it is what makes the relationship more valuable with every passing year.
on year
Complete transparency
Documentation that protects the whole chain.
Compliance is not a checkbox. It is a code of practice — with justified deviations, documented and owned by everyone responsible for the system.
Every deficiency we find is reported. Every deviation from BS 5839-8 and BS EN 50849 is documented with its risk level and a recommended action. Repeated issues are escalated through a structured corrective action process.
When questions are asked about a system — by a regulator, an insurer, or an incident investigator — that record is everything. Ours will be there.
What we do
One specialisation. Done properly.
Maintenance
A Maintenance Contract that grows more diagnostic every year. A minimum of two visits per year to BS 5839-8 and BS EN 50849: all loudspeakers checked for operation, orientation and condition; all circuit impedances measured and compared year-on-year with calibrated equipment; subjective intelligibility testing in every zone. Each visit builds on the record of the last.
Call Outs
When a fault is reported — a zone failure, a panel alarm, a system not performing as expected — we attend, diagnose with calibrated test equipment, and restore service where we can. Every attendance is documented: what was found, what was done, and what action follows.
Repairs
Component failure, wiring degradation, circuit faults identified during maintenance or a call out — we locate the fault, replace or rectify, and restore the system to standard. Every repair is documented with the fault cause, the work carried out, and the post-repair verification.
Upgrades
Enhancements to systems we know — because we maintain them. Technology refresh, zone amendments, controller upgrades, compliance improvements. Because we are not installation contractors, there is no conflict of interest: we recommend what the system needs, not what generates the largest project.
Compliance Planning
Not every system can reach full life-safety certification in a single budget year — and it does not need to. We build structured compliance roadmaps that move your system progressively towards BS 5839-8 or BS EN 50849 certification, year by year, within your budget cycle. Each phase is designed so the work already completed remains valid and every pound spent counts towards the end goal.
Consultancy
Acoustic modelling of spaces. System specification development. Tender management and contractor selection. Expert witness and compliance advisory. When you need an independent opinion on a complex PAVA, safety sound or ESS installation — at design stage, during procurement, or after an incident — we are the specialists you call.
The Right Scope
Maintenance, repairs, improvements. The full service life of your system.
Our value is in the long-term relationship — knowing a system, tracking its condition over time, and ensuring it performs when it matters. We do not compete for large installation projects. That focus is precisely what makes us useful.
Levels of protection
Three levels of maintenance. One question: how much are you willing to leave to chance?
Every programme includes work carried out by a named specialist technician, standards-referenced reporting, and a documented audit trail. The difference between them is the depth of testing and the frequency of visits.
Comprehensive
Recommended
Essential
Who we work with
PAVA expertise that works for everyone in the chain.
Fire & security contractors
PAVA expertise that makes your service offer stronger.
PAVA is a profitable discipline — maintenance, repairs, and upgrade work all carry good margin. But that value depends on the underlying service being genuinely comprehensive. Clients who receive thorough PAVA maintenance generate more remediation work, more upgrade opportunities, and fewer reactive call-outs.
We provide the specialist capability that makes your PAVA service credible, compliant, and commercially productive. You retain the client relationship. We handle the discipline that requires dedicated equipment, standards depth, and focused experience.
- More billable workThorough loudspeaker circuit testing surfaces repairs and upgrades that incomplete maintenance contracts miss. That work flows back to you.
- Standards-grade documentationReports referencing BS 5839-8, BS EN 50849, and the EN 54 product standards — audit-ready and professionally presented.
- Specialist equipment on every visitLine impedance testing, continuity verification, and coverage checks — done properly, every time.
- Your brand, our depthWe integrate with your workflow and reporting. Your client sees a seamless, professional service.
Acoustic Modelling & LiDAR
See exactly what your system will do — before a single loudspeaker is installed.
We build full 3D acoustic models of your space using measured noise data, reverberation times, and surface properties from the actual building — not assumptions from a datasheet. You see colour-mapped STI predictions before any physical work begins. You compare alternative layouts. You choose with evidence.
LiDAR scanning
We scan your space with LiDAR to produce a millimetre-accurate 3D model of the building as it actually is — not as the drawings say it should be. Built spaces vary from their original drawings and change over time. Even where drawings exist, the scan is more accurate. Where drawings are incomplete, outdated, or do not exist at all, the scan makes acoustic modelling possible where it otherwise would not be.
Acoustic modelling
We collect real ambient noise levels and reverberation measurements from your space and feed them into the 3D model alongside the acoustic properties of every surface. The output is colour-mapped STI predictions across the entire listening plane — not estimates, but evidence-based predictions built on measured data from your actual building. We can then test alternative layouts — different loudspeaker types, different positions, different configurations — so you choose the design based on predicted performance versus cost, with the evidence in front of you.
3D walkthroughs
The LiDAR scan produces a fully navigable 3D walkthrough of your building. This is yours to keep — for facilities records, insurance documentation, or your own marketing. It is a complete digital twin of your space, delivered as a by-product of the acoustic design process.
"We commissioned a full acoustic model based on measured noise and reverberation data from the space. Two alternative loudspeaker layouts were simulated and compared on predicted intelligibility and cost before we committed to a design."
What you can say to your board, your insurer, and your auditor.
Documentation is only as good as the moment it is captured. AllLogged is used by our technicians on every visit to photograph, annotate, and record each loudspeaker as it is tested.
Every photo is tagged with location, status, and job reference. Every record is stored to the cloud the moment it is taken. Nothing is written up later from memory. Nothing is estimated or filled in back at the office.
The result is a time-stamped photographic record of every loudspeaker on your site — exportable, auditable, and available whenever you need it.
- Photo capture on siteEach loudspeaker photographed and logged at the point of testing, not reconstructed afterwards.
- Location & status taggingEvery record carries zone, location, and pass/fault status — linked directly to the maintenance report.
- Cloud-backed recordsAll data is stored securely to the cloud the moment it is captured. No local-only records that can be lost.
- Exportable evidenceFull photographic exports available per job — ready for your compliance file, insurer, or regulator.
What choosing ProAudium allows you to say
You are not just choosing a maintenance provider. You are choosing the position you will defend to your colleagues.
When your manager asks why you did not go with the cheapest option, you need an answer that makes you look informed, credible, and professionally responsible. We give you that answer — in writing, in plain language, ready to share upward.
"We appointed an ISO 9001 certified PAVA specialist who tests every loudspeaker circuit — not just the panel. Our compliance documentation now meets BS 5839-8 in full."
"We transferred the PAVA risk to a specialist contractor with 15 years of experience and the equipment to test what our own technicians cannot. The audit trail is complete."
"I selected a provider whose reporting includes an executive summary I can present directly to senior management. The system is compliant and the evidence is documented."
The venues that trust us
Organisations in environments like yours already work with us.
Gatwick Airport
Emergency sound systems across one of the UK's busiest international airports — where system failure during an incident is not an abstract risk.
London Olympia
Voice alarm and PA systems at one of London's most iconic exhibition venues, serving complex multi-zone event environments with high and variable occupancy.
Fulham Football Club
Emergency sound and PA systems at Craven Cottage — a Premier League venue where crowd safety, intelligibility and zoned evacuation capability are critical.
Brighton Centre
Safety sound and legacy infrastructure compliance for Brighton's principal conference and entertainment venue — progressive system enhancement, seasonal calibration and BS 6259 compliance across large-format spaces with high public footfall.
Drusillas Zoo Park
Site-wide safety sound system using Bosch Praesensa — centralised PA with supervised zones, building the technical foundation for progressive BS 5839-8 compliance across a mixed indoor-outdoor visitor attraction.
We also maintain systems across commercial office estates, maritime and offshore facilities, education, healthcare, and retail — for facilities managers, M&E contractors, fire and security companies, and building owners.
Legislation
Martyn's Law: what should your venue be considering?
Ten questions, two minutes, no email required to see your result. The Terrorism (Protection of Premises) Act 2025 requires qualifying venues to have four procedures: evacuation, invacuation, lockdown and communication. This tool gives you a steer on your likely tier and on the question most venues have not yet asked: whether your building can actually deliver the communication those procedures depend on.
Prefer to read first? Read the full Martyn's Law guide.
What type of venue is this?
Knowledge Hub — free expert content
We publish the things most companies keep behind a sales call.
Technical guides, testing advice, and honest analysis — written for the people who actually maintain and manage these systems. No gate, no form, no follow-up call. Use it.
7 PAVA Loudspeaker Circuit Testing Tips Fire Techs Cannot Afford to Miss
The No B.S. Guide to Speech Transmission Index (STI PA) for Fire Techs
Demystifying 100 V Line for PAVA Systems
3 Vital Emergency PA System Tests Every Stadium Should Perform
Fault Find Any PAVA System with the Zircle Impedance Meter
Unlock up to 35% Savings on Your PAVA Quotation
Get in touch
Our interest is the same as yours — a system that works when it has to.
We maintain a controlled client base across London and the South East. This is deliberate — it ensures we can provide the response times, the reporting depth, and the continuity of named personnel that we commit to.
Whether your system needs full PAVA certification or a structured path to get there over time — we meet you where you are and guide you to where you need to be, at a pace your budget allows.